担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acs.jpcc.3c02992

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acsami.3c06624

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記述言語：日本語   掲載種別：研究論文（その他学術会議資料等）  

http://iartkasen.com/2023/07/5763/

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Electrochemical Society of Japan  

DOI： 10.5796/electrochemistry.23-00037

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acs.jpcc.3c01961

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担当区分：責任著者   記述言語：日本語   掲載種別：研究論文（研究会，シンポジウム資料等）   出版者・発行元：キャパシタフォーラム  

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担当区分：責任著者   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.22-00090

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.electacta.2022.141000

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担当区分：責任著者  

DOI： 10.1016/j.ceramint.2022.07.093

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担当区分：責任著者  

DOI： 10.1016/j.elecom.2022.107333

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担当区分：責任著者  

DOI： 10.1016/j.ensm.2022.04.030

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.21-00075

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/acsaem.0c02063

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.matchemphys.2020.123619

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1039/d0ra08299f

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2020.115374

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.carbon.2020.03.016

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1149/1945-7111/aba1a7

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/acsomega.0c02111

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/batt.202000061

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.20-63009

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.elecom.2020.106705

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.19-00027

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1155/2019/2501039

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijbiomac.2018.12.006

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2018.04.148

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2018.05.081

Scopus

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担当区分：責任著者   記述言語：日本語   出版者・発行元：日本油化学会  

総説論文

DOI： 10.5650/oleoscience.18.185

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.17-00089

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s11164-018-3348-6

Scopus

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

平成30年度電気化学会論文賞受賞

DOI： 10.5796/electrochemistry.85.650

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.85.671

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/acsami.7b12340

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2017.05.090

Web of Science

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.85.490

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：NATURE PUBLISHING GROUP  

A comprehensive understanding of the charge/discharge behaviour of high-capacity anode active materials, e.g., Si and Li, is essential for the design and development of next-generation high-performance Li-based batteries. Here, we demonstrate the in situ scanning electron microscopy (in situ SEM) of Si anodes in a configuration analogous to actual lithium-ion batteries (LIBs) with an ionic liquid (IL) that is expected to be a functional LIB electrolyte in the future. We discovered that variations in the morphology of Si active materials during charge/discharge processes is strongly dependent on their size and shape. Even the diffusion of atomic Li into Si materials can be visualized using a back-scattering electron imaging technique. The electrode reactions were successfully recorded as video clips. This in situ SEM technique can simultaneously provide useful data on, for example, morphological variations and elemental distributions, as well as electrochemical data.

DOI： 10.1038/srep36153

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE INC  

The effect of Li+ addition at the interface of a 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)amide ([C(2)mim][FSA]) room-temperature ionic liquid (RTIL) and a Pt electrode is investigated by infrared-visible sum-frequency generation (IV-SFG) vibrational spectroscopy. Addition of Li+ to the Pt vertical bar[C(2)mim1[FSA] system results in the extension of the electrochemical window (EW) by >1.0 Vat its negative edge. The potential dependence of the SF signal reveals that the [FSA](-) anion of neat [C2mim][FSAI is desorbed at 1.5 V while it remains in place even at 2.0 V when Li+ is added. The SFG spectra indicate that the [FSA](-) anion at the Pt vertical bar[C(2)mim][FSA] interface interacts with Li+ at the interface with the negatively-charged Pt electrode. This [FSA](-) anion layer anchored through Li+ suppresses [C(2)mirr](+) cation adsorption on the negatively-charged Pt electrode, resulting in a wider electrochemical window. (C) 2016 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.elecom.2016.09.003

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

We propose novel hybrid capacitors (HCs) with electrolyte-involved redox reactions of bromide or iodide species by pretreatment of an activated carbon positive electrode. The treatment is simple; impregnation of pores at an activated carbon fiber cloth (ACFC) as a positive electrode with bromine- or iodine-containing water before cell assembly. The treated positive electrode is applied to a HC cell with a non-treated negative electrode of ACFC and its electrochemical performance is investigated by galvanostatic cycling and leakage current tests. Few studies on such "electrolytic" charge storage systems have provided acceptable capacitor performance because of inevitable self-discharge caused by diffusion of charged species form an electrode to the other one through an electrolyte. Nevertheless, our electrolyte-redox-based HCs show excellent performance without undesirable diffusion of charged species. Moreover, the present HC utilizing a bromide redox system fulfills a practical cell voltage of 1.8 V in spite of an aqueous electrolyte system. This high voltage provides excellent energy density, which is 5 times higher than that in a conventional aqueous electric double-layer capacitor (EDLC), and 1.2 times higher even than that in a 2.7 V-class non-aqueous EDLC, while keeping high charge discharge rate capability. (C) 2016 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jpowsour.2016.04.021

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER INST PHYSICS  

The electrochemical and structural properties of the electrical double layers for two-component electrolytes were studied by Monte Carlo simulations using simple models. When the electrolyte contains two species of cations that have different diameters, the capacitance on the cathode dramatically increases as a large negative potential is applied. This behavior is qualitatively similar to the one reported in an experimental work that has used Li-containing ionic liquid as the electrolyte [M. Yamagata et al., Electrochim. Acta 110, 181-190 (2013)], in which it has also been reported that addition of Li ions to the electrolyte enhances the potential window to the negative side. The analysis of the ionic structure showed that the electrical double layer on the cathode is dominantly formed by the larger cations under small negative potentials, while they are replaced by the smaller cations under large negative potentials. This transition of the ionic structure with electrode potential is also consistent with the enhancement of the potential window that was found in the experimental work, which suggests that the organic cations are expelled from the electrical double layer under large negative potentials and the chance of decomposition is reduced. (C) 2016 AIP Publishing LLC.

DOI： 10.1063/1.4944927

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.pnsc.2015.11.011

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

平成28年度電気化学会論文賞受賞

DOI： 10.5796/electrochemistry.83.918

Web of Science

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

J-GLOBAL

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/06418.0013ecst

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2015.01.144

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2015.01.070

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1149/2.0581503jes

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1093/jmicro/dfv003

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2014.09.096

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1149/2.029406jes

Web of Science

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記述言語：日本語   出版者・発行元：The Electrochemical Society of Japan  

DOI： 10.5796/electrochemistry.82.622

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2013.06.051

Scopus

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2013.06.040

Web of Science

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/05329.0093ecst

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.81.857

Web of Science

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.81.867

Web of Science

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/05026.0317ecst

Web of Science

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記述言語：日本語   出版者・発行元：The Surface Science Society of Japan  

DOI： 10.1380/jsssj.34.389

CiNii Books

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2012.05.073

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/05043.0027ecst

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1039/c2ra22188h

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記述言語：日本語   出版者・発行元：THE CARBON SOCIETY OF JAPAN  

We propose a novel electrochemical capacitor (EC) that used electrolyte-based redox reactions of halogen species, which are induced by a novel pretreatment of an activated carbon positive electrode. This treatment, consisting of an impregnation of pores at a positive electrode of activated carbon fiber cloth (ACFC) with a halogenated solution such as bromine water before cell assembly, is simple and convenient. An aqueous sodium bromide solution is applied to an EC cell containing the treated positive electrode and a non-treated negative electrode of ACFC. Few studies have so far obtained ECs using an "electrolyte" charge storage system with practical performance due to diffusive loss of charged species from an electrode into an electrolyte or its shuttle migration between electrodes. Nonetheless, we have attained excellent capacitor performance with such a concept by suppressing an undesirable diffusion of electrolyte reactive species. This concept, electrolyte-based charge storage, is applicable to not only the above aqueous EC but also non-aqueous EC and lithium-ion capacitor application with dramatically improved performance.

DOI： 10.7209/tanso.2013.15

CiNii Books

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その他リンク： https://jlc.jst.go.jp/DN/JALC/10015100886?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2012.11.013

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2012.01.031

Web of Science

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

H25年度電気化学会論文賞 受賞

DOI： 10.5796/electrochemistry.80.808

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.80.825

Web of Science

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3693060

Web of Science

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3693061

Web of Science

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担当区分：責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

J-GLOBAL

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記述言語：日本語   出版者・発行元：電気化学会溶融塩委員会  

CiNii Books

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1149/2.020111esl

Web of Science

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3563087

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2010.01.011

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2010.02.037

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.78.345

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ELECTROCHEMICAL SOC INC  

Non-aqueous gel electrolytes based on an alginate (Alg) and 1-ethyl-3-methylimidazolim tetrafluoroborate (EMImBF(4)) were prepared for electric double layer capacitors (EDLCs). The transparent colorless gel sheet has high mechanical intensity and high retentivity of ionic liquids enough to construct EDLC cells. According to charge/discharge measurements, the model EDLC cell with an Alg/EMImBF(4) gel shows high discharge capacitance in spite of using a gel-state electrolyte, implying that high affinity of alginate for an activated carbon electrode leads to a decrease in the electrode/electrolyte interfacial resistance. A test cell with Alg(3%)/EMImBF(4) maintains its coulombic efficiency over 99.8 % during 4,000 cycles.

DOI： 10.1149/1.3414018

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2009.09.049

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.elecom.2010.01.012

Scopus

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1149/1.3270498

Web of Science

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2009.07.043

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3334797

Web of Science

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.77.696

Web of Science

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3123129

Scopus

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2008.07.053

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3109629

Scopus

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.77.51

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.elecom.2008.10.039

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

We demonstrate the effect of bundle structure, composed of multiwalled carbon nanotube (MWCNT) material in disordered MWCNT electrodes, on electric double-layer capacitor (EDLC) performance (i.e., their rate capability and specific capacitances). This is done by applying two types of MWCNTs with low (50-100) and high (2500-10,000) aspect ratios of their length to diameter. The use of these physically opposite values elucidates how the electronic pathways, pore distribution, and sidewall/edge balance of MWCNTs contribute to these electrodes' kinetic and capacitive performance for EDLC. (C) 2008 The Electrochemical Society. [DOI: 10.1149/1.3049907] All rights reserved.

DOI： 10.1149/1.3049907

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

We demonstrate the effect of bundle structure, composed of multiwalled carbon nanotube (MWCNT) material in disordered MWCNT electrodes, on electric double-layer capacitor (EDLC) performance (i.e., their rate capability and specific capacitances). This is done by applying two types of MWCNTs with low (50-100) and high (2500-10,000) aspect ratios of their length to diameter. The use of these physically opposite values elucidates how the electronic pathways, pore distribution, and sidewall/edge balance of MWCNTs contribute to these electrodes' kinetic and capacitive performance for EDLC. (C) 2008 The Electrochemical Society. [DOI: 10.1149/1.3049907] All rights reserved.

DOI： 10.1149/1.3049907

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担当区分：責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.76.886

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2008.08.086

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2008.09.020

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.2985636

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2008.05.036

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

A variety of vertically aligned multiwalled carbon nanotube (MWCNT) electrodes, which maintain their original morphology prepared by a chemical vapor deposition technique, has been successfully fabricated by a transfer methodology from a seedbed substrate to a current collector. No ohmic potential drop on a galvanostatic discharge was observed for an electric double-layer capacitor (EDLC) containing electrodes with not only a MWCNT length of 10 mu m but also a length of 200 mu m. Cyclic voltammograms for electrodes with MWCNT lengths of both 10 and 200 mu m showed no distorted current response, even at an extremely high scan rate of 50 V s(-1). These results demonstrate that the present EDLC with the MWCNT electrodes can provide an outstanding rate capability irrespective of the MWCNT length when prepared by our transfer methodology. To find suitable MWCNT electrodes for high-performance EDLCs, we investigated several relationships among the specific capacitances of aligned MWCNT electrodes and their major properties, i.e., their gravimetric and volumetric capacitances, length, diameter, and number density. (c) 2008 The Electrochemical Society. [DOI: 10.1149/1.2988743] All rights reserved.

DOI： 10.1149/1.2988743

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

A variety of vertically aligned multiwalled carbon nanotube (MWCNT) electrodes, which maintain their original morphology prepared by a chemical vapor deposition technique, has been successfully fabricated by a transfer methodology from a seedbed substrate to a current collector. No ohmic potential drop on a galvanostatic discharge was observed for an electric double-layer capacitor (EDLC) containing electrodes with not only a MWCNT length of 10 mu m but also a length of 200 mu m. Cyclic voltammograms for electrodes with MWCNT lengths of both 10 and 200 mu m showed no distorted current response, even at an extremely high scan rate of 50 V s(-1). These results demonstrate that the present EDLC with the MWCNT electrodes can provide an outstanding rate capability irrespective of the MWCNT length when prepared by our transfer methodology. To find suitable MWCNT electrodes for high-performance EDLCs, we investigated several relationships among the specific capacitances of aligned MWCNT electrodes and their major properties, i.e., their gravimetric and volumetric capacitances, length, diameter, and number density. (c) 2008 The Electrochemical Society. [DOI: 10.1149/1.2988743] All rights reserved.

DOI： 10.1149/1.2988743

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：応用物理学会  

DOI： 10.11470/oubutsu.76.10_1150

CiNii Books

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.75.592

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.75.586

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.75.589

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：電気化学会溶融塩委員会  

CiNii Books

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2007.01.068

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Electrochemical Society of Japan  

DOI： 10.5796/electrochemistry.75.379

CiNii Books

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00292194227?from=CiNii

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1149/1.2437665

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担当区分：責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.75.273

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2006.02.077

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Surface Science Society of Japan  

学術研究助成基金 2004-2005

DOI： 10.1380/jsssj.27.461

CiNii Books

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00283174016?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/bcsj.68.2207

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2006.01.022

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担当区分：筆頭著者   記述言語：日本語   出版者・発行元：The Society of Polymer Science, Japan  

高性能蓄電デバイスとして最近注目されている電気二重層キャパシタと,高分子との技術的な関わりについて概括し,今後の展望を与える。すなわちキャパシタの原理,非水系ならびに水系の高分子ゲル電解質,疑似容量キャパシタ用途の電子導入性高分子材料について解説する。さらに最近の研究動向についても興味深いものを取り上げて紹介する。

DOI： 10.1295/kobunshi.54.874

CiNii Books

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00271901044?from=CiNii

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2005.03.007

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5796/electrochemistry.73.600

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記述言語：日本語   掲載種別：研究論文（その他学術会議資料等）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jpowsour.2004.07.028

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2004.02.053

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2004.01.128

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

The anodic behavior of aluminum (Al) current collector of Li-ion batteries has been investigated in organic electrolyte solutions containing lithium bis[trifluoromethylsulfonyl]imide (Li(CF3SO2)(2)N:LiTFSI) with different compositions of solvents. The Al anode was subjected to anodic corrosion in the LiTFSI solution, but the degree of the corrosion depended on the solvent composition. The surface of Al pre-treated by mechanical polishing has suffered serious corrosion in the mixed solvent solution of ethylene carbonate (EC) and dimethyl carbonate (DMC), whereas the Al surface pre-treated by electro-polishing was relatively stable in the mixed solvent of gamma-butyrolactone (GBL) and DMC. The results of electrochemical quartz crystal microbalance (EQCM) experiments showed that the mass change of the Al surface during the potential cycling in GBL + DMC was much different from that in the EC + DMC solution. Scanning electron microscope (SEM) observation proved that the corrosion pits evolved on the electro-polished Al surface after potential cycling, but GBL resulted in a smaller amount of the corrosion product on the Al surface. (C) 2003 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0378-7753(03)00253-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Novel polymeric gel electrolytes consisting of poly(ethylene oxide)-modified poly(methacrylate) (PEO-PMA) with magnesium imide (Mg[(CF3SO2)(2)N](2)) as the electrolytic salt and mixed alkyl carbonates as the plasticizer have been prepared by photo-induced radical polymerization. The polymeric gel film was flexible and self-standing with proper mechanical strength. The ionic conductivity of the polymeric gel film was about 10(-3) S cm(-1) at room temperature. The ionic conductivity increased with the content of the plasticizer, ethylene carbonate (EC) and dimethyl carbonate (DMC), in the complex, while the mechanical strength of the gel film decreased with the increase in the plasticizer. The highest conductivity was obtained for the composition of 75 wt.% of the plasticizing component, EC+DMC dissolving Mg[(CF3SO2)(2)N](2) in the gel. The applicability of the present gel film to a rechargeable battery system was examined by a prototype cell consisting of Mg-doped V2O5 and V2O5 (or MnO2) as the negative and positive electrodes, respectively. (C) 2003 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(03)00221-4

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

Nonaqueous proton-conducting gel electrolyte has been prepared by incorporating anhydrous H3PO4 in poly(ethylene oxide)-modified poly(methacrylate) (PEO-PMA) plasticized by poly(ethylene glycol) dimethyl ether (PEGDE). Optically transparent polymeric gel membranes were obtained in a wide range of the component ratio. The sample membranes have been characterized by AC conductivity, FTIR, and DSC measurements. High conductivity of 1.3 x 10(-4)S cm(-1) was obtained at room temperature for the composition of the (PEO-PMA)/PEGDE mass ratio 32:68. The ionic conductivity was enhanced by the addition of small amounts of the second plasticizer, dimethylformamide (DMF). The DC polarization experiments of the gel membranes with Pt blocking electrodes revealed that the charge transport in the gel was mainly ionic (t(ion) > 0.99), where the type of the major mobile species was considered to be H+ cation with mobility mu = 2.5 x 10(-4) cm(2) V-1 s(-1). The FTIR spectroscopy proved that hydrogen-bonding and protonic interactions exist between the dopant H3PO4 and the PEO-PMA matrix and/or entrapped plasticizer in the gel. In all cases, the Arrhenius plots of the conductivity showed linear relations in the temperature range of 22-90 degreesC. The mechanism of the ion transport in the nonaqueous gel is briefly discussed.

DOI： 10.1021/cm021076s

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Proton-conducting polymeric gels have been prepared by swelling a polymethacrylate-based polymer matrix in aqueous solutions of inorganic and organic acids such as sulfuric (H2SO4), hydrochloric (HCl), phosphoric (H3PO4), acetic (HAc), and succinic acids (HSc). The polymer matrix was composed of cross-linked poly(ethylene oxide)-modified polymethacrylate (PEO-PMA) with different plasticizing components of poly(ethylene glycol) dimethylether (PEGDE), dimethylformamide (DMF), and propylene carbonate (PC). The polymeric gels were characterized by conductometric and spectroscopic measurements. High ionic (proton) conductivity in the range of 6.4 × 10-4 -4.2 × 10-2 S cm-1 were obtained at room temperature (22 °C), depending on the dopant acids, the type of plasticizers, and the polymer composition. The H3PO4- and HAc-doped films exhibited thermal stability in the temperature range of 20-80 °C. Possible proton transport mechanisms in the PEO-PMA-based gels were discussed based on the spectroscopic results of FT-IR, UV/VIS, X-ray diffraction (XRD), and fluorescence spectroscopy. The effects of water molecule absorbed in the polymer, together with the entrapped plasticizer (PEGDE, DMF, and PC), play important roles in obtaining the high ionic conductivity, through the reduction in the local viscosity of the gel films. © 2003 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0167-2738(02)00691-4

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

Polymeric electrolytes consisting of oligo(ethylene oxide)-grafted polymethacrylate (PEO-PMA) matrix, linear polyether and magnesium salts have been prepared, and their electrochemical behavior as solid Mg2+ ion conductors has been examined. Thermal analyses showed that the obtained polymeric electrolytes are homogeneous and amorphous over a wide temperature range. The conductivity depended much on the kind of the dissolved magnesium salt. The highest conductivity was obtained for the polymeric electrolyte containing Mg[(CF3SO2)2N]2 (&gt
10-4 S cm-1 at room temperature). The dc polarization of a Pt/Mg cell using the polymeric electrolyte proved that Mg2+ is mobile in the present polymeric system. A prototype cell was constructed using the polymeric electrolyte with a Mg (or Li) anode and a V2O5 cathode, where the intercalation-deintercalation of Mg2+ occurred reversibly. © 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0167-2738(02)00308-9

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

A novel polymer matrix containing carbonyl groups in its network structure has been examined as the base component of polymeric gel electrolytes for rechargeable lithium batteries. The gel electrolyte was prepared by solidification based on photo-induced radical polymerization of a mixture of ethylmethacrylmethyl carbonate (EMMC) and diethyleneglycol dimethacrylate (DEGDM) that contains LiPF6 as the electrolytic salt with a liquid component of ethylene carbonate (EC) and dimethyl carbonate (DMC). The obtained gel film was flexible and self-standing with proper mechanical strength. The ionic conductivity of the polymeric film was about 1 mS cm-1 at room temperature. The introduction of carbonyl groups to the polymer matrix was effective to hold the liquid component as homogeneous gel phase. The applicability of the present gel system to rechargeable battery was examined by cyclic voltammetry and constant-current polarization of metallic lithium and lithium titanate electrodes. © 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0167-2738(02)00295-3

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

A proton conducting polymeric gel membrane was first developed from poly(ethylene oxide)-modified poly(methacrylate) (PEO-PMA) containing poly(ethylene glycol) dimethylether (PEGDE). Acetic acid (HAc) was doped by immersing the polymeric film directly in the aqueous solution of HAc. Characterization by FT-IR, XRD and AC conductivity measurements were carried out on the film electrolytes consisting of different gel compositions. The ionic conductivity of the membrane showed a sensitive variation with the immersion time and concentration of the acid in the doping solution through the changes in the contents of acid and water in the gel. The ionic conductivity also depended on the PEGDE content in the polymer. The proton conductivity was 6.2 x 10(-4) S cm(-1) at 20 degreesC and 1.0 x 10(-3) S cm(-1) at 80 degreesC for the gel prepared from HAc concentration of 3.0 mol l(-1). The temperature dependence of the conductivity was found to be consistent with Arrhenius-type relationship at a temperature range from 20 to 80 degreesC, except for the films with low PEGDE contents. The apparent activation energy for the proton conduction was in the range of 5-30 kJ mol(-1), depending on the HAc concentration and the polymer matrix composition. The FT-IR spectra of the polymeric membranes showed that HAc does not protonate the carbonyl or ester groups of the polymer matrix, but interacts with them by the hydrogen bonding interaction or weak molecular interactions. (C) 2002 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(02)00280-3

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

The anodic polarization behavior of aluminum (Al) as a current collector of lithium (Li) ion battery has been investigated in organic electrolyte solutions containing different lithium salts. The Al current collector has suffered serious corrosion in the solution containing Li(CF3SO3)(2)N (LiTFSI) under an anodic polarization condition, whereas, it was anodically stable in the LiPF6 solution. In the solution of Li(C2F5SO2)(2)N (LiBETI), the Al anode showed an intermediate character between those in the LiPF6 and LiTFSI solutions. The corrosion behavior of the Al electrode was much influenced by its surface condition. The addition of LiPF6 in the imide-salts (LiTFSI and LiBETI) solutions suppressed the anodic corrosion of Al. The results of electrochemical quartz crystal microbalance (EQCM) experiments proved that the anodic processes on Al in the organic electrolytes consist of the formation of surface films and their dissolution. The X-ray photoelectron spectroscopy (XPS) analysis suggests that the anodic stability of the Al electrode in the imide-salts solutions containing LiPF6 is associated with the formation of a fluoride (AlF3)-rich film on the Al surface. (C) 2002 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(02)00164-0

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記述言語：日本語   出版者・発行元：The Surface Finishing Society of Japan  

DOI： 10.4139/sfj.53.219

CiNii Books

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ELECTROCHEMICAL SOCIETY INC  

A novel polymeric gel electrolyte system for electrochemical devices has been developed and its proton conducting behavior was investigated at an ambient temperature range. The get system consists of a poly(ethylene oxide)-modified polymethaerylate (PEO-PMA) matrix with linear polyether (PEGDE) doped with inorganic and organic acids from aqueous solutions. About 2 x 10(-2) cm(-1) of the conductivity was obtained for the H3PO4 doped gel film at room temperature. The contents of acid and water in the gel, which depend on the doping conditions, gave critical influences on the conductance behavior of the resulting get. Applicability of the gel system was briefly examined by cyclic voltammetry using a cell with a gel electrolyte film.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ELECTROCHEMICAL SOCIETY INC  

Gel electrolytes of poly-(fluorovinylidene-hexafluoropropylene) and (PVdF-HFP) with propylene carbonate (PC) as a plasticizer and the asymmetric ammonium salt triethylmethylammonium tetrafluoroborate (TEMABF(4)), have been applied to electric double layer capacitors (EDLCs), Ac impedance measurements show that the gel-type capacitors with TEMABF(4) have not only lower electrolyte-bulk resistances but also lower electrolyte/electrode-interface resistances in comparison with capacitors with a typical electrolytic salt tetraethylammoniurn tetrafluoroborate (TEABF(4)). The capacitors with TEMABF(4) have a higher capacitance than that with TEABF(4) especially under a high-rate cycling condition; the former capacitance is comparable to that observed in non-gel (usual liquid) systems with PC and TEMABF(4) even under a high-rate cycling condition.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

Solid-state magnesium (Mg) batteries have been constructed with a novel polymeric electrolyte that conducts Mg2+ ion at ambient temperature. The polymeric electrolyte consisting of oligo(ethylene oxide)-grafted polymethacrylate and a linear polyether dissolving an Mg salt showed as high ionic conductivity as 0.4 mS cm(-1) at 60 degreesC. A test cell made of a V2O5 cathode and an Mg metal anode (Mg/V2O5) with the Mg2+-conducting polymeric electrolyte showed the first discharge capacity of about 100 mAh g (V2O5)(-1). The discharge capacity and the rechargeability of the cell were improved when Mg metal was substituted by Li metal. The discharge and recharge profile of the cell using an Mg-doped V2O5 anode (MgxV2O5/V2O5) proved that the present polymeric Mg2+-ion conductor will help to develop an all-solid rechargeable Mg-ion battery. (C) 2001 The Electrochemical Society.

DOI： 10.1149/1.1403195

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記述言語：日本語   出版者・発行元：The Surface Finishing Society of Japan  

DOI： 10.4139/sfj.52.581

CiNii Books

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

The charge and discharge characteristics of chromium-substituted lithium manganate spinel, LiCr0.1Mn1.9O4, have been studied in organic electrolyte solutions with different compositions. The rate capability and the cycle performance of the oxide cathode depended much on the electrolyte composition. Higher initial capacity was observed in the electrolyte solution showing higher ionic conductivity. Good cycle performance was obtained in LiBF4 solutions with ternary solvent systems containing 1,2-dimethoxyethane (DME). Addition of Li2CO3 to the LiPF6 solution improved the cycleability of the oxide cathode. The electrolyte composition giving lower impedance at the oxide/solution interface showed less capacity degradation during the charge/discharge cycles. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0378-7753(01)00752-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

Precycling of lithium (Li) metal on a nickel substrate at a low-temperature (-20 degreesC) in propylene carbonate (PC) mixed with dimethyl carbonate (DMC) and Li hexafluorophosphate (LiPF6) (LiPF6-PC/DMC) enhanced Li cyclcability in the subsequent cycles at a room temperature (25 degreesC). In LiPF6-PC/DMC, not only the low-temperature precycling in the initial 10 cycles was effective in the improvement of Li cycle life but also the first low-temperature Li deposition followed by room temperature cycling enhanced the: Li cycle life. Such a precycling effect was observed with various current densities at the initial Li deposition and the subsequent cycling. When the current density of the cycling was high, improved cycling efficiency was observed and the efficiency of the Li electrode undergoing the precycling was dose to that at a constant temperature of -20 degreesC. (C) 2001 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0378-7753(01)00621-8

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Polymeric electrolytes consisting of poly(ethylene oxide)-grafted polymethacrylates, lithium salts and ceramic filler (LiAlO2) have been prepared. The addition of a small amount of LiAlO2 increased the ionic conductivity of the polymeric electrolyte system containing LiClO4 salt over an ambient temperature range. Conductivity of 3.5 x 10(-5) S cm(-1) at 333 K (60 degreesC) was obtained for the composite without any low molecular weight liquid component. The addition of the ceramic filler scarcely influenced the thermal properties of the polymeric electrolyte. XRD and Li-7 NMR experiments showed that the ionic mobility can be enhanced in the composites by adding LiAlO2,. For the polymeric electrolyte system containing LiCF3SO3 sail, however, the addition of the ceramic filler showed little influence on the ionic conductivity. (C) 2001 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(00)00754-4

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

A novel polymeric electrolyte system has been developed using oligo(ethylene oxide)-grafted polymethacrylate matrix and linear polyether which dissolves magnesium salts. Thermal analyses showed that the obtained polymeric electrolytes have homogeneous and amorphous phases over a wide temperature range. The ionic structure of the polymeric system was examined by Raman spectroscopy. The ionic conductance behavior of the polymeric electrolyte was investigated as solid Mg2 + -ion conductors. The conductivity depended mostly on the kind of the dissolved magnesium salt. The highest conductivity was obtained for the polymeric electrolytes containing Mg[(CF3SO3),N](2) (about 10 (- 4) S cm (- 1) at room temperature). Addition of dimethyl formamide as a complex-forming liquid component in the polymeric electrolyte system enhanced the ionic conductivity. The de polarization of an Mg/Mg cell using the polymeric electrolyte proved that Mg2+ is mobile in the present polymeric system. (C) 2001 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(00)00705-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier Science Publishers B.V.  

Polymeric ion conductors consisting of poly(ethylene oxide)-grafted poly(methylmethacrylate) (PEO-PMMA) matrices that dissolve lithium salts and rare earth salts have been prepared by photo-induced radical polymerization of methacrylate monomers with a linear polyether (PEGDE). The ionic structure and conductance behaviour of the resulting electrolyte systems were investigated as a function of the electrolyte composition. Polymeric electrolytes containing lithium salts with rare earth cations showed higher ionic conductivity than that containing lithium salts only. The conductance behaviour of the mixed salt system is discussed from the experimental results of thermal analysis, Raman spectroscopy, transport number measurements and 7Li NMR.

DOI： 10.1016/S0167-2738(00)00613-5

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記述言語：日本語   出版者・発行元：電気化学会電池技術委員会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Polymeric electrolytes consisting of oligo(ethylene oxide)-grafted poly(methylmethacrylate), organic plasticizer and inorganic salts of multivalent cations (Mg2+, La3+, Ce3+ and Yb3+) have been prepared. Their behavior as solid ion conductors has been examined. Thermal and X-ray analyses showed that the polymeric electrolytes were homogeneous and amorphous over a wide temperature range. Ionic conductivities of 10(-4) and 10(-5) S cm(-1) were obtained at room temperature for the polymeric films containing Mg(ClO4)(2) and Ce(ClO4)(3), respectively. The ionic conductivity depends critically on the composition of the polymer electrolytes. The ionic coordination in the polymeric electrolytes, as determined by Raman spectroscopy, is discussed in relation to the conductance behavior. (C) 2000 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(99)00341-2

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ELECTROCHEMICAL SOCIETY INC  

The electrochemical behavior of an LiCr0.1Mn1.9O4 positive electrode (cathode) has been studied in organic electrolyte solutions with different compositions. The results of cyclic voltammetry (CV) and constant current polarization (CCP) indicated that the redox response and the discharge capacity of the LiCr0.1Mn1.9O4 cathode depended much on the electrolyte composition. Higher initial capacity and rate capability were observed in the electrolyte compositions showing higher ionic conductivity. Good cathode performance was obtained in an LiBF4 solution with a mixed ternary solvent system of ethylene carbonate, dimethyl carbonate and 1,2-dimethoxyethane (EC+DMC+DME).

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

The electrochemical behavior of an LiMn2O4 electrode in organic electrolytes, consisting of mixed carbonate solvents with lithium (Li) salts, has been studied by constant current polarization and electrochemical impedance spectrometry. The discharge capacity and the impedance response of the electrode depended on the electrolyte composition. The state of charge, namely the Li content in the metal oxide, varied the impedance response. The interfacial resistance was more influenced by the electrolytic salt than the solvent. The apparent diffusion coefficient of Li in the oxide was evaluated from the impedance response. The relationship between the impedance response and the electrolyte composition is discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(00)00315-7

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：MATERIALS RESEARCH SOCIETY  

Polymer gel electrolytes consisting of poly(vinylidene fluoride) (PVdF), tetraethylammonium tetrafluoroborate (TEABF(4)), and propylene carbonate (PC) as a plasticizer have been investigated for electric double layer capacitors. The PVdF gel electrolytes showed high ionic conductivity (ca. 6 mS cm(-1) at 298 K). To assemble model capacitors with the PVdF gel electrolytes and activated carbon fiber cloth electrodes, a pair of the fixed electrodes was soaked in a precursor solution containing PC, PVdF, and TEABF(4), followed by evaporation of the PC solvent in a vacuum oven. The resulting gel electrolytes were in good contact with the electrodes. The model capacitors with the PVdF gel electrolytes showed a large value of capacitance and high coulombic efficiency in operation voltage ranges of 1-2 and 1-3 V. It is worth noting that the capacitors with the PVdF electrolytes showed long voltage retention in a self-discharge test. These good characteristics of our gel capacitors were comparable to those of typical double layer capacitors with a liquid organic electrolyte containing PC and TEABF(4); rather, the voltage retentivity of the PVdF gel capacitors was much superior to that of the capacitors with the organic electrolyte.

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   出版者・発行元：The Surface Finishing Society of Japan  

DOI： 10.4139/sfj.50.839

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

Precycling of lithium (Li) metal on a nickel substrate at low temperatures (0 and - 20 degrees C) in propylene carbonate (PC) mixed with dimethyl carbonate (DMC) and Li hexafluorophosphate (LiPF6) (LiPF6-PC/DMC) was found to enhance Li cycleability in the subsequent cycles at a room temperature (25 degrees C). In contrast when the precycling at the low temperatures was performed in PC mixed with 2-methyltetrahydrofuran (2MeTHF) and LiPF6 (LiPF6-PC/2MeTHF), no improvement in the Li cycling efficiency was observed in the subsequent cycles at 25 degrees C. These results suggest that the low-temperature precycling effect on the Li cycleability depends on a co-solvent used in the PC-based electrolytes. Ac impedance analysis revealed that the precycling in the low-temperature LiPF6-PC/DMC electrolyte provided a compact Li interface with a low resistance. In marked constant to this, a Li anode interface formed by the precycling in the LiPF6-PC/2MeTHF system was irregular and resistive to Li-ion diffusion. The origins of the low-temperature precycling effect dependent on the co-solvents were discussed. (C) 1999 Elsevier Science S.A. All rights reserved.

DOI： 10.1016/S0378-7753(98)00213-4

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

The addition of aluminum iodide (AlI(3)) to a mixed electrolyte, consisting of propylene carbonate (PC) and dimethyl carbonate (DMC), containing lithium hexafluorophosphate (LiPF(6)), was found to reduce the charge-discharge cyclability of a Li metal electrode. In contrast, addition of magnesium iodide (MgI(2)) improved the Li cycling efficiency in the same electrolyte. The origin of the addition effects on the cyclability was investigated by electrochemical and chemical analyses; ac impedance and X-ray photoelectron spectroscopy revealed that the addition of MgI(2) to the electrolyte provided a low-resistance interface on the Li anode while in the presence of AlI(3) the decomposition products of PF(6)(-) at the Li interface impeded the charge-discharge cycling of Li. (C) 1999 Elsevier Science S.A. All rights reserved.

DOI： 10.1016/S0022-0728(99)00170-9

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

The charge and discharge characteristics of LiNiO(2) and LiMn(2)O(4) have been investigated in mixed carbonate-based electrolyte solutions. The discharge capacity depended on the electrolytic salt. The order of the capacity, LiCF(3)SO(3) < LiPF(6) less than or equal to LiClO(4), which is common to both electrodes, is partly consistent with that of the ionic conductivity of the solution. The solvent composition also affected the charge and discharge behavior. However, the order in the capacity did not strictly coincide with that of the ionic conductivity of the electrolyte. Moreover the details of the influence of the electrolyte composition was somewhat different between the oxide electrodes. The ac impedance at the electrode/electrolyte interface varied with the electrolyte composition. It showed that higher discharge capacities are obtained in electrolyte solutions which show lower interfacial resistances. (C) 1999 Elsevier Science S.A. All rights reserved.

DOI： 10.1016/S0378-7753(99)00225-6

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

The a.c. impedance of the LiNiO2 electrode was measured in organic electrolyte solutions based on mixed carbonate solvents containing inorganic lithium salts. The electrolyte composition influenced the impedance response of the oxide electrode as well as the charge and discharge characteristics under constant-current polarization conditions. The impedance responses changed with the state of the charge of the oxide, i.e, the x value in Li1-xNiO2. The impedance diagrams were analyzed using three equivalent circuit models. The interfacial resistance and the apparent diffusion coefficient of lithium, evaluated from the impedance responses. varied with the sort of solvent and salt. The interfacial resistance showed a minimum value around x = 0.5 in Li1-xNiO2 for every electrolyte system, while the apparent diffusion coefficient decreased with decreasing x value. The relation between the electrolyte composition and the impedance response of the oxide is discussed. The electrolyte composition influences the effective cross section of the diffusion process in the solid phase through its effect on the surface chemistry of the oxide cathode. (C) 1999 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0013-4686(98)00284-9

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

Lithium ion conductors with novel polymeric matrices have been developed for rechargeable lithium batteries operating at ambient temperature. The polymeric electrolytes were prepared by photo-induced radical co-polymerization of mixtures of ethylmethacryl-methyl carbonate (EMMC) and diethyleneglycol dimethacrylate (DEGDM) dissolving LiClO4 with propylene carbonate (PC) as plasticizing solvent. The resulting composite films were homogeneous, flexible and self-standing. The ionic conductivity depended much on the polymer matrix structure. The conductivity increased with decreasing the degree of cross-linking and with increasing the PC content in the composite. A high conductivity of about 10(-3) S cm(-1) at room temperature was obtained for the composite containing 70 wt.% of PC-LiClO4. The Li+ transport number was measured as a function of the electrolyte composition. The electrochemical and thermal stabilities of the composites also depended on the polymer matrix structure as well as the PC content. (C) 1998 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0167-2738(98)00399-3

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

The ionic structure of organic electrolyte solutions has been investigated, by means of Raman spectroscopy for mixed aprotic solvents that dissolve lithium salts. The solutions consisted of binary solvent systems of a high permittivity solvent (ethylene carbonate, EC) mixed with low viscosity alkyl carbonates (dimethyl carbonate, DMC, and diethyl carbonate, DEC) or a linear alkyl ether (1,2-dimethoxyethane, DME) and of LiCF3SO3, LiPF6 and LiN(C2F5SO2)(2) as the solute. The Raman shifts based on the solvents varied with the sort of dissolved lithium salts and their concentration. The ion solvation was estimated from the side-bands of the Raman scattering for the C-O stretch of single bonds of the carbonate groups and for the symmetric ring deformation of EC. The number of EC molecules interacting with the lithium cation (Li+) was higher than that of DMC in a mixed EC + DMC (50 : 50 by volume) system. The apparent solvation number of Li+ in 1.5 mol dm(-3) LiCF3SO3 solution was about 2.8 in EC + DMC, whereas that in 1.5 M LiPF6 solution was about 3.9. Specific solvation of Li+ was distinguished in EC + DME (50 : 50), where DME predominantly coordinates to Li+. However, it was also confirmed that EC, which has a lower donicity, interacts with Li+ even in the EC + DME system. That is, the solvation number of EC in LiCF3SO3/(EC + DME) remained ca. 1.0 even in high salt concentrations.

DOI： 10.1039/A806278A

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：KLUWER ACADEMIC PUBL  

Charge and discharge behaviour of LiNiO2 positive electrode has been examined in organic electrolytes with different compositions. The discharge capacity of the oxide electrode at a moderate cycling rate varied with the electrolyte composition. Redox responses in potential sweep voltammetry also depended on the kind of lithium salt and solvent of the electrolyte. Electrolyte solutions of relatively low ionic conductivity generally gave lower voltammetric responses and rate capability. A.c. impedance analysis of the LiNiO2 electrode before and after the charge and discharge demonstrated that the surface chemistry of the oxide, depending on the electrolyte composition, has an important influence on the rate capability of the oxide electrode in organic electrolyte solutions.

DOI： 10.1023/A:1003239027232

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：MATERIALS RESEARCH SOCIETY  

Activated carbon fiber cloth (ACFC) electrodes whose surface was modified by "pulsed cold plasma", i.e., low-temperature plasma generated by a pulsed electric power in argon-oxygen mixed gas at a reduced pressure, were applied to electric double layer (EDL) capacitors with an organic electrolyte composed of propylene carbonate and tetraethylammonium tetrafluoroborate (TEPLBF4). The treatment of the ACFC electrodes with the pulsed cold plasma increased total capacitance in the EDL capacitors. The observed increase in the total capacitance was ascribed mainly to an ascertained increase in capacitance of a negative ACFC electrode involving TEA(+) cation adsorption/desorption with the cold plasma treatment. No obvious increase in capacitance of a positive ACFC electrode involving BF4- anion adsorption/desorption was observed with the plasma treatment. The chemical and electrochemical characteristics of a treated ACFC interface were found to be favorable for TEA(+) cation adsorption/desorption.

DOI： 10.1557/PROC-496-655

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

Electrochemical lithium intercalation into graphite and related carbonaceous materials has been investigated in ethylene carbonate (EC)-based organic electrolytes using electrochemical quartz crystal microbalance (EQCM). During constant-current charging (cathodic polarization), changes in the resonance frequency indicated the mass of the electrode increasing generally with an increase in charge passed. The mass change of the graphite per quantity of electricity (Delta m Delta Q(-1)) depended on the electrolyte composition in the potential range of 0.0-0.2 V versus Li/Li+ as well as in the more positive potential range. Variations in Delta m Delta Q(-1) with electrode potential revealed that the relative rate of electrolyte decomposition yielding precipitation on the graphite surface changes with electrode potential. For the artificial graphite, the mass change in EC + DMC (dimethyl carbonate) containing LiClO4, was larger than that in EC + PC (propylene carbonate) containing LiClO4, which suggested that the process in EC + DMC is somewhat different from that in EC + PC. These results are discussed in connection with those obtained from conventional electrochemical and X-ray diffraction measurements. (C) 1997 Elsevier Science S.A.

DOI： 10.1016/S0378-7753(96)02558-X

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

The effect of the inorganic additives to electrolytes, aluminum iodide (AlI3) and tin(II) iodide, on the charge/discharge coulombic efficiency of a lithium (Li) metal anode has been investigated in binary solvent systems, i.e., propylene carbonate (PC) mixed with 2-methyltetrahydrofuran (2Me-THF) containing lithium perchlorate (:LiClO4), PC + 2Me-THF/LiClO4,, and PC mixed with 1,2-dimethoxyethane (DME) containing LiClO4,, PC + DME/LiClO4,,. AlI3 improved the coulombic efficiency of the Li metal anode in both the binary solvent systems. Two-dimensional Li ionic currents at the interface of the Li metal anode were monitored by using in situ scanning vibrating electrode technique (SVET) in the representative binary system, PC + 2Me-THF/LiClO4,, in;he absence and presence of the additives. The relationship between the coulombic efficiency and the Li ionic current distribution on the anode was discussed. (C) 1997 Published by Elsevier Science S.A.

DOI： 10.1016/S0378-7753(97)02524-X

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC INC  

Under low-temperature conditions (at -10 or 0 degrees C) the charge-discharge cycling efficiency of lithium (Li) metal on a nickel (Ni) substrate in mixed electrolytes, ethylene carbonate and dimethyl carbonate, containing Li hexafluorophosphate ar Li trifluoromethanesulfonate was higher than that observed in the corresponding electrolyte systems at 25 degrees C. When the charge-discharge cycling of Li in the low-temperature electrolytes was followed by cycling al 25 degrees C, the charge-discharge at 25 degrees C maintained the high cycleability observed at the low temperatures. This suggests that precycling under the low-temperature conditions improved the efficiency in the following cycles at room temperature. AC impedance analysis revealed that the precycling in the low-temperature electrolytes provided a low-resistance Li interface which remained on the Li metal even after a rise in temperature to 25 degrees C.

DOI： 10.1149/1.1837563

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ELECTROCHEMICAL SOCIETY INC  

The effect of inorganic additives to electrolytes, aluminum iodide (AlI3) and tin (II) iodide (SnI2), on charge-discharge coulombic efficiency of a lithium (Li) metal anode has been investigated in binary solvent systems, i.e., propylene carbonate (PC) mixed with dimethyl carbonate (DMC) containing lithium perchlorate (LiClO4), PC+DMC/LiClO4, and ethylene carbonate (EC) mixed with DMC containing LiClO4, EC+DMC/LiClO4. AlI3 improved the coulombic efficiency of the Li metal anode in both the binary solvent systems while no obvious improvement of the efficiency was observed for the electrolyte systems with SnI2. The relationship between the coulombic efficiency and ac impedance behavior of a Li anode interface in the presence of the additives is discussed.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier Science S.A.  

Polymeric solid electrolyte films containing rare earth metal ions (Ce3+, La3+, Yb3+) have been prepared, with a view to applying them to solid-state electrochemical devices. The films, composed of poly(ethylene oxide)-grafted poly(methylmethacrylate) (PEO-PMMA), were prepared by dissolving rare earth salts with appropriate amounts of poly(ethylene glycol) dimethyl ether (PEG) that have ethylene oxide units in their structure. The ionic conductance behaviour of the polymeric composite electrolyte systems was investigated by AC impedance and DC polarization methods in an ambient temperature range. The oligo(ethylene oxide) units in the polymer matrix and the PEG components ensured the dissociation of the salts and the high mobility of the resulting ionic species in the solid films. About 10-5 S cm-1 or above of ionic conductivity was obtained for a PEO-PMMA/PEG/Ce(ClO4)3 system at room temperature. The addition of a liquid plasticizer in the composite improved the conductivity by about two orders of magnitude.

DOI： 10.1016/S0925-8388(96)02642-4

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ELECTROCHEMICAL SOCIETY INC  

Polymer gel electrolytes consisting of poly(vinylidene fluoride) (PVDF), tetraethylammonium tetrafluoroborate, and propylene carbonate as a plasticizer have been investigated for electric double-layer capacitors. The PVDF gel electrolytes showed high ionic conductivity (ca. 6 x 10(-3) S cm(-1) at 20 degrees C) and had good stability over a wide potential range (ca. 5 V). The model capacitors with the PVDF gel electrolytes and activated carbon fiber cloth,electrodes showed large values of capacitance and high coulombic efficiency in the operation voltage ranges of 1-2 and 1.5-2.5 V. Especially, it is worth noting that the capacitors with the PVDF electrolyte showed low leakage current, and long voltage retention in self discharge tests.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier  

The suitability of organic electrolyte systems for highly graphitized carbon anodes has been discussed by considering the stability of co-solvents included in ethylene carbonate-based electrolytes and the stability of lithium salts. The side-reaction and the film formation on the graphitized anodes were found to affect the discharge capacity of the graphitized anodes. With respect to the lithium salts, lithium bistrifluoromethylsulfonyl imide offered high and stable capacity. Furthermore, the electrochemical behavior of a surface film on a lithium metal anode was investigated at various operating temperatures. It was found that the operating temperature during charge/discharge cycling influences the morphology of the film on a lithium metal anode, resulting in the variation in charge/discharge coulombic efficiency of a lithium metal anode. The results are discussed in view of the stability of electrolyte solutions and the film formation between the negative electrode and the organic electrolyte solution. © 1997 Elsevier Science S.A.

DOI： 10.1016/S0378-7753(97)02515-9

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ELECTROCHEMICAL SOCIETY INC  

Under low-temperature conditions (at 0 degrees C and -20 degrees C) the charge-discharge cycling efficiency of lithium (Lj) metal on a nickel substrate in propylene carbonate/dimethyl carbonate (1:I by vol.) with Li hexafluorophosphate was higher than that observed in the corresponding electrolyte system at 25 degrees C. When the charge-discharge cycling of Li in the low-temperature electrolyte was followed by the cycling at 25 degrees C, the charge-discharge at 25 degrees C maintained the high cycleability observed at the low temperatures. This suggests that the precycling under the low-temperature conditions improved the efficiency in the following cycles at room temperature (25 degrees C). Ac impedance analysis revealed that the precycling in the few-temperature electrolyte provided the low-resistance Li-interface which remained on the Li metal even after a rise in temperature to 25 degrees C.

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1246/cl.1996.953

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA LAUSANNE  

The suitability of Li(CF3SO2)(2)N, lithium bistrifluoromethylsuIfonyl imide, as an electrolytic salt for a graphitized mesocarbon microbeads (MCMBs) anode is investigated via charge/discharge cycling tests and a.c. impedance spectroscopy. The application of Li(CF3SO2)(2)N resulted in excellent discharge (corresponding to the de-intercalation of lithium ion from MCMBs) capacity and stable charge/discharge cycleability of the anode in a 1:1 mixture (by volume) of ethylene carbonate with dimethyl carbonate or diethyl carbonate. According to the a.c. impedance analysis, the Li(CF3SO2)(2)N electrolyte systems maintained a stable interfacial resistance between the anode and the electrolytes during charging of the anode.

DOI： 10.1016/S0378-7753(96)02413-5

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：VCH PUBLISHERS INC  

Cerium(III) species have been immobilized in Nafion films coated on a glassy carbon electrode by a dipping method. The redox activity was characterized In aqueous acidic solutions by cyclic voltammetry. The redox process was diffusion-limited, suggesting that the cerium(III) species distributed in the multilayer of Nafion and that the diffusion of the charge-compensating anion in the film was rate-controlling. The cerium(III)-immobilized Nafion films showed a mediation activity for the electrochemical oxidation of substituted benzylalcohols to yield corresponding arylaldehydes and carboxylic acids. The activity and the selectivity of the process depended an the oxidation potential of the substrate compound. Macroelectrolysis of p-nitrobenzylalcohol using cerium(III)-immobilized electrodes gave corresponding p-nitrobenzaldehyde with a high rate and selectivity.

DOI： 10.1002/elan.1140080823

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記述言語：日本語   出版者・発行元：The Surface Finishing Society of Japan  

DOI： 10.4139/sfj.47.498

CiNii Books

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00040254579?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA LAUSANNE  

Charge/discharge behavior of electric double-layer capacitors composed of activated carbon fiber cloth (ACFC) electrodes and an organic electrolyte was investigated. The modification of the ACFC electrodes was performed using cold plasma generated in argon-oxygen atmosphere. The effect of the cold plasma treatment of the ACFC electrodes on the capacitor performance was discussed on the basis of the physical and chemical properties of the ACFC surface such as pore radius distribution and surface atom concentration.

DOI： 10.1016/S0378-7753(96)80016-4

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC INC  

Electrochemical lithium intercalation into graphite has been studied in ethylene carbonate (EC) based electrolytes using x-ray diffraction (XRD) and electrochemical quartz crystal microbalance techniques. The graphite electrode after cathodic polarization in EC mixed with dimethyl carbonate (DMC) showed a different XRD pattern from that polarized in EC mixed with propylene carbonate (PC). Changes in the resonance frequency of the graphite-coated quartz crystal proved that the cathodic intercalation of lithium into graphite is accompanied by the electrochemical decomposition of the electrolyte. The mass change per quantity of electricity in the potential range of 0.0 to 0.2 V vs. Li/Li+ was higher in EC+DMC than in EC+PC.

DOI： 10.1149/1.1836445

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier  

Complexes of poly(ethylene oxide)-grafted poly(methylmethacrylate) (PEO-PMMA) and lithium (Li) salts have been prepared as polymeric solid electrolytes for rechargeable Li batteries. As high conductivities as 10-3 S cm -1 at room temperature were obtained for the PEO-PMMA-based electrolytes containing Li salts with a liquid plasticizer. Effects of the crown ethers in the electrolytes were examined on the ionic conductance behavior. The addition of 12-crown-4 (12Cr4) or 15-crown-5 (15Cr5) improved the ionic conductivity to a small extent. However, the ionic mobility of Li in the electrolyte was improved by the addition of 15Cr5. The transport number of Li+ in the electrolytes containing 15Cr5 was much higher than those in the electrolytes without crown ethers. The specific solvation of Li+-15Cr5 contributes not only to the improvement in the ionic mobility of Li+ but also to the suppression in the reaction rate of the Li electrode in the polymeric electrolytes.

DOI： 10.1016/0167-2738(96)00160-9

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier Ltd  

The electrochemical behavior of the interface between lithium (Li) alloy electrodes containing a small amount of metal [aluminum (Al) or tin (Sn)] and a propylene carbonate (PC)-based electrolyte has been investigated. The contents of Al and Sn were below 3.0wt.%. Ac impedance analysis revealed that Li-Al electrodes showed relatively low and stable resistance at the electrode/electrolyte interface during the electrode immersion in the electrolyte as well as during charge-discharge cycling. On the other hand, a Li-Sn electrode gave higher interfacial resistance than a "pure" Li electrode. Cyclic voltammetry measurement and galvanostatic charge-discharge cycling test revealed the Li-Al electrode exhibited small polarization from the ideal redox potential of Li/Li+ during charging and discharging while the Li-Sn electrode showed relatively large polarization. The polarization behavior of the various electrodes correlated with the interfacial resistance characterized by the ac impedance measurement.

DOI： 10.1016/0013-4686(95)00445-9

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Polymer gel electrolytes consisting of poly(acrylonitrile) (PAN), propylene carbonate(PC) as a plasticizer and tetraalkylammonium salts such as tetrabutylammonium perchlorate, tetraethylammonium perchlorate and tetraethylammonium tetrafluoroborate have been investigated for electric double-layer capacitors with activated carbon fiber cloth electrodes. The PAN, PC and tetraalkylammonium composites showed high ionic conductivity (above 10(-3) Scm(-1) at 298 K). The ionic conductivity increased with an increase in the salt concentration and a decrease in the size of each ion. The composites were electrochemically stable over a wide potential range (ca. 5.O V). The application of the PAN and tetraethylammonium tetrafluoroborate composites to the electric double-layer capacitors with activated carbon fiber cloths as polarizable electrodes resulted in large values of capacitance and high coulombic efficiency. The low leakage current at constant voltage floating (2 V) and the long voltage retention in the self-discharge test were obtained in the capacitor with tetraethylammonium tetrafluoroborate.

DOI： 10.1016/0013-4686(95)00166-C

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC INC  

Polyaniline-poly[p-styrenesulfonic acid-co-methoxy-oligo(ethylene glycol)acrylate] composite (PANI-PSSA-co-MOEGA) electrode was prepared for an all-solid-state rechargeable lithium battery and a Li/PANI-PSSA-co-MOEGA model cell was fabricated by combining a cross-linked poly(ethylene oxide)-grafted poly(methylmethacrylate)RiClO(4) polymer electrolyte. PSSA-co-MOEGA dopant has anchored anion sites (benzenesulfonic acid site) for doping polyaniline and oligo-ethylene oxide side chains for improving the adhesion between the electrode and the polymer electrolyte. Li/PANI-PSSA-co-MOEGA cell exhibited good cyclability and high capacity over 40 cycles. A model cell was also assembled by using a polyaniline electrode doped with perchlorate anion, PANI-ClO4, and the capacity of Li/PANI-ClO4 cell decreases over 10 cycles. The differences are caused by two factors. First, the PANI-PSSA-co-MOEGA composite film became a partially cation-doped type polymer (by doping polymer anion). Second, the interface between the PANI-PSSA-co-MOEGA electrode and the polymer electrolyte is improved by incorporating the oligo-ethylene oxide side chains in both materials. The diffusion rate of the dopant ions in PANI-PSSA-co-MOEGA was faster than in the PANI-ClO4 film.

DOI： 10.1149/1.2048737

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記述言語：英語   出版者・発行元：ELSEVIER SCIENCE SA LAUSANNE  

Boron-carbon-nitrogen composite (BCxN) matrices (BC3N, BC7N, and BC10N) for rechargeable lithium batteries are synthesized by a thermal decomposition method. BC10NLi0.5 is prepared by the thermal decomposition of a mixture of the starting materials for BC10N and lithium hydroxide (LiOH). The charge/discharge behaviour of these layered-structure compounds is investigated in an organic electrolyte that contains lithium salts. The capacity increases with an increase in the carbon content. The LiOH treatment causes an increase in the discharge capacity of boron-carbon-nitrogen material.

DOI： 10.1016/0378-7753(94)02173-Z

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA LAUSANNE  

The structure of a polyaniline-poly(styrene-4-sulfonate) (PAn-PSS) composite film was optimized as the positive electrode for rechargeable lithium batteries to improve the charge/discharge characteristics in organic electrolyte solutions. The composite films prepared in aqueous poly(styrene-4-sulfonic acid) (PSSH) solutions containing small amounts of HClO4 showed higher charge/discharge capacities than those prepared in PSSH without HClO4. However, the utilization of Li+-ion transport in the redox process decreased with an increase in the HClO4 concentration. A stacked PAn-ClO4/PAn-PSS film, which consists of an inner PAn layer doped with smaller size anion (ClO4-) and an outer PAn-PSS composite layer, was prepared by the electrolysis of aniline in aqueous HClO4 followed by the polymerization in a PSSH solution. The resulting films gave improved charge/discharge characteristics in organic electrolyte solutions and lead to higher energy density of the full cell with lithium negative electrode.

DOI： 10.1016/0378-7753(94)02069-F

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA LAUSANNE  

New inorganic additives, tin(II) iodide and aluminum iodide (A1I(3)), improved charge/discharge cycling efficiency of a lithium (Li) electrode in propylene carbonate electrolyte containing lithium perchlorate as the electrolytic salt. The combination of different types of additive, i.e., the addition of A1I(3) together with 2-methylfuran to the electrolyte, resulted in an excellent cycling efficiency of the Li electrode. The electrochemical behavior of an Li electrolyte-organic electrolyte interface was investigated by in situ techniques such as a.c. impedance measurements and scanning vibrating electrode technique. The relation between the Li rechargeability and the interfacial behavior of the Li electrode in the organic electrolyte in the absence and the presence of the additives was discussed.

DOI： 10.1016/0378-7753(94)02088-K

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC INC  

Layered polyaniline/polyanion composite films (PAn-X/PAn-PA) we re synthesized by electrochemical oxidation of aniline in aqueous acid solutions (HCl, HClO4) followed by polymerization in poly(styrene-4-sulfonic acid) (PSSH) solutions. The films consist of inner polyaniline (PAn layers doped with smaller size anions (X) and outer PSS-doped PAn layers. The resulting films showed high redox activities with cation-transfer properties in organic electrolyte solutions. The improved charge/discharge characteristics of the composite firms gave an expectation of higher energy density for the full cell with lithium negative electrode.

DOI： 10.1149/1.2043981

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：MATERIALS RESEARCH SOC  

DOI： 10.1557/PROC-393-195

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Investigation of the electrodeposition process of rare earth composite films from organic solution.

DOI： 10.4139/sfj.46.1193

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Polyaniline-p-styrenesulfonic acid (PANI-p-SSA) composites were synthesized by electrochemical oxidation of polyaniline in the p-styrenesulfonic acid aqueous solutions. p-Styrenesulfonic acid was incorporated in the polyaniline matrix as a dopant anion. PANI-p-SSA composite film (polymer-monomer composite) was converted to polyaniline-poly(p-styrenesulfonic acid) (PANI-PSSA, polymer-polymer) composite film by the post-polymerization process. A PANI-p-SSA film was soaked in benzoyl peroxide-CCl4 solution and the film was heated at 60 °C for 12 h under Ar atmosphere for post-polymerization. The film shrank about 17% after post-polymerization. The PANI-PSSA composite showed the ability of cation doping in organic electrolyte solution. © 1995.

DOI： 10.1016/0379-6779(94)03273-9

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC JAPAN  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC JAPAN  

The indirect electrooxidation of substituted methylbenzenes to arylaldehydes by Ce(IV) mediators has been studied. The yield and selectivity of the aldehyde varied with the combination between the substrate compound and the mediator. The reaction mode was characterized by the relationship between the oxidation potential of the substrate (E(s,ox)) and the apparent redox potential of the mediator (E(m,red)). The second-order rate constant for the oxidation of the methylbenzenes with the oxidized mediators depended on the potential difference, DELTAE = E(s,ox)-E(m,red). Marcus's electron-transfer theory was apparently applied for endothermic systems. High yields of aldehydes were obtained when the systems had moderate values of DELTAE.

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC INC  

New inorganic additives, tin (II) iodide (Snl(2)) and aluminum iodide (All(3)), improved the charge/discharge cycling efficiency of lithium (Li) electrodes in propylene carbonate electrolyte containing lithium perchlorate as the electrolytic salt. The synergistic effect of All(3) with and methylfuran on the cycling efficiency is also reported. The electrochemical behavior of the Li electrode/organic electrolyte interface was investigated by an in situ scanning vibrating electrode technique. The relationship between the Li rechargeability and the interfacial behavior of the Li electrode in the organic electrolyte in the absence and the presence of the additives is discussed.

DOI： 10.1149/1.2059378

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC JAPAN  

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC JAPAN  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

Poly(2,5-dihydroxyaniline) films, synthesized by elctropolymerization of 2,5-dimethoxyaniline followed by hydrolysis of methoxy groups in an acidic solution, gave a characteristic redox response like a hydroquinone/quinone couple in aqueous electrolyte solutions. The film showed electrocatalysis for a simple redox system.

DOI： 10.1246/cl.1994.1645

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記述言語：日本語   出版者・発行元：ELECTROCHEMICAL SOC JAPAN  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

Solid polymer electrolytes consisting of complexes of poly(ethylene oxide)-grafted poly(methyl)-methacrylate (PEO-PMMA) and tetraalkylammonium salts [tetrabutylammonium perchlorate, tetraethylammonium perchlorate, and tetraethylammonium tetrafluoroborate (TEABF4)] have been investigated for electric double-layer capacitors with activated carbon fiber cloth electrodes. The PEO-PMMA and tetraalkylammonium composites obtained showed high tonic conductivity (>10(-4) S cm-1 at 298 K). The tonic conductivity depended on both the concentration and the size of each ion. The composites had good stability over a wide potential range (ca. 5.0 V). When the PEO-PMMA and TEABF4 composites were used in solid-state electric double-layer capacitors with activated carbon fiber cloths as polarizable electrodes, the capacitors showed charge/discharge behavior with large values of capacitance and high coulombic efficiency. The long voltage retention was observed in the self-discharge test of the capacitor with TEABF4.

DOI： 10.1149/1.2054995

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

Polyaniline-poly(styrene sulfonate) (PAn-PSS) composite films have been synthesized by electropolymerization of aniline in aqueous media containing Poly(styrene sulfonic acid). The electrochemical behavior of the film was studied in aqueous and organic electrolyte solutions using cyclic voltammetry and constant-current polarization techniques. In acidic aqueous solutions, the PAn-PSS composite film showed a reversible redox reaction accompanied b cation transfer. The redox activity in organic electrolyte solutions depended on the composition of the solution measured. The composite film showed low redox activity during the initial cycles in 1 mol dm-3 (M) LiClO4 solution of propylene carbonate (PC). The redox activity of the film increases significantly on repeated scans in a mixed solvent system (PC + 1,2-dimethoxyethane (DME)). Electron probe microanalysis experiments proved that the redox reaction of the composite film in organic electrolytes was accompanied by a cation (Li+) transfer process between the film and the organic electrolyte. The coulombic efficiency of charge-discharge cycling under constant-current polarization was nearly 100% after the redox activity reached a steady state.

DOI： 10.1149/1.2054938

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC INC  

The electrolytic conductivities of lithium trifluoromethanesulfate (LiCF3SO3) and lithium hexafluorophosphate (LiPF6) have been investigated as a function of the solvent composition. The organic solvent tested was ethylene carbonate (EC) or propylene carbonate mixed with 1,2-dimethoxyethane, diethyl carbonate, or dimethyl carbonate (DMC). For each solvent system, the electrolytes containing LiCF3SO3 showed nearly half the values of the conductivity of the corresponding systems with LiPF6. High discharge capacities (ca. 200 mAh g-1) for charge-discharge cycling of the carbon fiber electrode with a graphite structure were obtained in LiCF3SO3/EC-based electrolytes. Especially, the highest coulombic efficiency (98%) was obtained in the LiCF3SO3/EC-DMC system. The EC-based electrolyte systems containing LiCF3SO3 were found to be more compatible with the carbon fiber electrode than the systems containing LiPF6.

DOI： 10.1149/1.2054880

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELECTROCHEMICAL SOC JAPAN  

Layered-structure compounds, BC2N have been synthesized by a vapor-phase reaction of acetonitrile (CH3CN) and borontrichloride (BCl3). The electrochemical behavior of BC2N treated under various temperatures (1000, 1500, and 2000 degrees C) as a negative electrode matrix was investigated in the organic electrolyte systems in connection with rechargeable lithium batteries, focusing on the correlation between the charge/discharge characteristics and physical properties. The influences of the grain size, interlayer spacing and crystallinity of BC2N, and the Li diffusivity in this matrix upon the charge/discharge properties were discussed. Although BC2N contains a disordered structure, the diffusivity of Li in BC2N treated at 1500 degrees C was found to be comparable to that of a typical carbon electrode with a graphite structure.

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

The hydride transfer from 1,5-dihydroriboflavin-2',3',4',5'-tetra-acetate (FlH-2) to various hydride acceptors (tetracyano-p-quinodimethane, tetracyanoethylene, and p-benzoquinone derivatives) in deaerated acetonitrile proceeds via electron transfer from FlH-2 to hydride acceptors followed by proton and electron transfer. The formation of transient radical ion pair has been detected directly in the reactions of 1,5-dihydrofiboflavin-2',3',4',5'-tetra-acetate (FlH-2) with some hydride acceptors in deaerated acetonitrile, providing unequivocal evidence for an electron transfer pathway in the overall two-electron redox reactions of FlH-2 with hydride acceptors. The formal carbanion transfer from alkylcobalt(III) complexes to cobalt(III) porphyrin has also been shown to proceed via electron transfer, followed by the cleavage of cobalt-carbon bonds of alkylcobalt (IV) complexes and the subsequent bond formation between alkyl radical and cobalt(II) porphyrin to yield alkylcobalt(III) porphyrins. The rate constants of the overall carbanion transfer from alkylcobalt (III) complexes to cobalt (III) porphyrin agree well with those predicted by the Marcus theory for the rates of outer-sphere electron transfer reactions. In contrast with the case of alkylcobalt(III) complexes, the rate constants of the carbanion transfer from tetraalkyltin compounds (R4Sn) are 10(2)-10(13) times faster than those predicted by the Marcus theory depending on the size of alkyl group of R4Sn. The polar versus ET pathway is discussed in terms of the difference between outer-sphere versus inner-sphere electron transfer mechanisms based on the Marcus theory.

DOI： 10.1016/0301-0104(93)80244-4

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC INC  

Solid electrolytes consisting of complexes of poly(ethylene oxide)-grafted poly(methyl)-methacrylate (PEO-PMMA) and tetraalkylammonium salts (tetrabutylammonium perchlorate, tetraethylammonium perchlorate, and tetraethylammonium tetrafluoroborate) have been investigated for electric double-layer capacitors. The composites obtained showed high ionic conductivity (about 10(-4) S cm-1 at 298 K). When the PEO-PMMA-tetraethylammonium tetrafluoroborate composites were used in solid-state electric double-layer capacitors with activated carbon-fiber cloths as polarizable electrodes, the capacitors showed charge/discharge behavior with large values of capacitance. The maximum capacitance was ca. 0.57 F/cm2 (of each electrode), which was comparable to that of usual liquid-type electric double-layer capacitors.

DOI： 10.1149/1.2220779

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA LAUSANNE  

The ionic association constants of lithium perchlorate, lithium trifluoromethylsulfate, lithium hexafluorophosphate, and lithium tetrafluoroborate have been determined experimentally (by Shedlovsky's method) in various mixtures of propylene carbonate and 1,2-dimethoxyethane as typical electrolyte systems for rechargeable lithium batteries. The association constants vary extensively for different mixing ratios of propylene carbonate to 1,2-dimethoxyethane and for different species of salts. These values are compared with the theoretical values as predicted by the Fuoss and Bjerrum equations. On the basis of this comparison and some physical properties of the solution, the variation in the ionic association constants may be ascribed to the change of ionic association species, i.e., a contact ion-pair and a solvent-separated ion-pair.

DOI： 10.1016/0378-7753(93)87012-R

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

The acid-catalyzed reactions of 1,5-dihydroriboflavin-2',3',4',5'-tetraacetate (FlH-2) with quinones (Q) result in the one-electron oxidation of FlH-2 to FlH-2+. and the two-electron reduction of Q to the hydroquinones (QH-2) in the presence of HClO4 in acetonitrile. In the presence of Me4NOH, the base-catalyzed reactions result in the two-electron oxidation of FlH-2 to Fl and the one-electron reduction of Q to Q-..

DOI： 10.1246/cl.1992.2269

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記述言語：英語   出版者・発行元：ELECTROCHEMICAL SOC JAPAN  

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記述言語：日本語  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

The formation of a transient radical ion pair has been detected directly in the reactions of 1,5-dihydroriboflavin-2',3',4',5'-tetraacetate (FlH2) with hydride acceptors (tetracyano-p-quinodimethane, tetracyanoethylene and p-benzoquinone derivatives) in deaerated acetonitrile, providing unequivocal evidence for an electron transfer pathway in the overall two-electron redox reactions of FlH2 with hydride acceptors.

DOI： 10.1039/C39920001008

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