Updated on 2026/03/10

写真a

 
TAKESHITA Hiroyuki
 
Organization
Faculty of Chemistry, Materials and Bioengineering Professor
Title
Professor
Contact information
メールアドレス
Other name(s)
TAKESHITA, T. Hiroyuki
External link

Degree

  • Doctor of Engineering ( 1995.3 )

Research Areas

  • Nanotechnology/Materials / Structural materials and functional materials

Education

  • Kyoto University   Graduate School, Division of Engineering

    - 1995

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  • Kyoto University   Faculty of Engineering

    - 1989

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    Country: Japan

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  • Kyoto University   Graduate School, Division of Engineering

    1995

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    Country: Japan

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Research History

  • National Institute of Advanced Industrial Science and Technology (Osaka National Research Institute), Senior Research Scientist

    1995.4 - 2002.3

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Professional Memberships

Papers

  • Hydrogen storage properties and Mg2FeH6 formation in single-core and multicore Mg/Fe composite wires

    Ryota Kondo, Mamoru Miyatake, Tsuneo Akiura, Kaisei Sumihi, William Mark Rainforth, Hiroyuki T. Takeshita

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   178   2025.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijhydene.2025.151490

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  • Surface Structures and Hydrogenation Properties of Ti–Pd Alloys Immersed in Hydrogen Peroxide Reviewed

    Ryota Kondo, Yoshihiro Myokai, Yasushi Obora, Hiroyuki T. Takeshita

    MATERIALS TRANSACTIONS   64 ( 11 )   2615 - 2621   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Institute of Metals  

    DOI: 10.2320/matertrans.mt-m2023089

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  • Elucidation of Microstructure Formation Mechanism through Competitive Reactions during Initial Hydrogenation in Mg/Cu Super-Laminate Composites Reviewed

    Koji Tanaka, Ryota Kondo, Hiroyuki T. Takeshita

    JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS   85 ( 6 )   213 - 222   2021

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/jinstmet.J2021011

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  • Ti−Pd Alloys as Heterogeneous Catalysts for the Hydrogen Autotransfer Reaction and Catalytic Improvement by Hydrogenation Effects Reviewed

    Yuya Takahashi, Ryota Kondo, Masayoshi Utsunomiya, Takeyuki Suzuki, Hiroyuki T. Takeshita, Yasushi Obora

    ChemCatChem   11 ( 10 )   2432 - 2437   2019.5

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    DOI: 10.1002/cctc.201900318

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  • Bulk Ti-Pd Alloys as Easily Recyclable and Preactivation-Free Heterogeneous Catalysts for Cross-Coupling Reactions Reviewed

    Azuma, Ryusei, Takahashi, Yuya, Kondo, Ryota, Suzuki, Takeyuki, Takeshita, Hiroyuki T., Obora, Yasushi

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   92 ( 3 )   710 - 715   2019.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1246/bcsj.20180363

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  • Elucidation of Microstructure Formation Mechanism through Competitive Reactions during Initial Hydrogenation in Mg/Cu Super-Laminate Composites Reviewed

    Tanaka, Koji, Kondo, Ryota, Takeshita, Hiroyuki T.

    MATERIALS TRANSACTIONS   60 ( 5 )   642 - 651   2019

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    DOI: 10.2320/matertrans.MB201807

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  • Relationship between initial hydrogen absorption properties and microstructures of Mg/Cu super-laminate composites with different accumulative roll bonding cycles Reviewed

    K. Tanaka, D. Nishino, R. Kondo, H. T. Takeshita

    IOP Conference Series: Materials Science and Engineering   375   012032-1 - 012032-9   2018.10

  • Surface Properties of Air-Exposed alpha-Ti-Pd Alloys via XPS and Cross-Coupling Reaction Reviewed

    Kondo, Ryota, Nakamichi, Seiya, Azuma, Ryusei, Takahashi, Yuya, Obora, Yasushi, Takeshita, Hiroyuki T.

    MATERIALS TRANSACTIONS   59 ( 12 )   1911 - 1914   2018

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    DOI: 10.2320/matertrans.M2018240

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  • Competitive Reactions and Formation Mechanism of Microstructures in Mg/Cu Super-Laminate Composites during Initial Hydrogenation Reviewed

    Tanaka, Koji, Kondo, Ryota, Takeshita, Hiroyuki T.

    THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS   941   1927 - 1932   2018

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    DOI: 10.4028/www.scientific.net/MSF.941.1927

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  • Rechargeable organic batteries using chloro-substituted naphthazarin derivatives as positive electrode materials Reviewed

    Masaru Yao, Shinji Umetani, Hisanori Ando, Tetsu Kiyobayashi, Nobuhiko Takeichi, Ryota Kondo, Hiroyuki T. Takeshita

    JOURNAL OF MATERIALS SCIENCE   52 ( 20 )   12401 - 12408   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10853-017-1368-z

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  • Formation of Mg2Cu at low temperature in Mg/Cu super-laminate composites during initial hydrogenation Reviewed

    Koji Tanaka, Daiji Nishino, Kousei Hayashi, Shuki Ikeuchi, Ryota Kondo, Hiroyuki T. Takeshita

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   42 ( 35 )   22502 - 22510   2017.8

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    DOI: 10.1016/j.ijhydene.2017.02.193

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  • Effect of Tiny Pd Addition to Ti for Their Hydrogenation Properties Reviewed

    Ryota Kondo, Hiroyuki T. Takeshita

    PROCEEDINGS OF THE 3RD ANNUAL INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL ENGINEERING (AME 2017)   110   59 - 61   2017

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    DOI: 10.2991/ame-17.2017.10

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  • Transport Phenomena of Nonaqueous Electrolyte Solutions at High Concentrations: A Comparison between the Li- and Na-Systems Reviewed

    Kentaro Kuratani, Iori Kishimoto, Yasuhiro Nishida, Ryota Kondo, Hiroyuki T. Takeshita, Hiroshi Senoh, Tetsu Kiyobayashi

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY   163 ( 6 )   H417 - H425   2016

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/2.0931606jes

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    Other Link: http://orcid.org/0000-0002-7223-2295

  • Relationship Between Incubation Period and Specific Surface Area of Magnesium Hydride for Dehydrogenation Reviewed

    Shintaro Yui, Tatutaka Aoyama, Ryota Kondo, Koji Tanaka, Hiroyuki T. Takeshita

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   80 ( 12 )   740 - 744   2016

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/jinstmet.JD201604

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  • A New Bio-based Battery Material: Effect of Rate of Anthraquinone Skeleton Incorporation into Polyglycidol on Battery Performance Reviewed

    Atsushi Tsuzaki, Hisanori Ando, Masaru Yao, Tetsu Kiyobayashi, Ryota Kondo, Hiroyuki T. Takeshita

    COE ON SUSTAINABLE ENERGY SYSTEM (THAI-JAPAN)   89   207 - 212   2016

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1016/j.egypro.2016.05.027

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  • Improving the cycle-life of naphthoquinone-based active materials by their polymerization for rechargeable organic batteries Reviewed

    Masaru Yao, Tatsuhiro Numoto, Hisanori Ando, Ryota Kondo, Hiroyuki T. Takeshita, Tetsu Kiyobayashi

    COE ON SUSTAINABLE ENERGY SYSTEM (THAI-JAPAN)   89   213 - 221   2016

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1016/j.egypro.2016.05.028

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  • Formation mechanism of micro/nano-structures through competitive reactions in Mg/Cu super-laminate composites during initial hydrogenation Reviewed

    Koji Tanaka, Kazuya Shibata, Kosuke Kurumatani, Shuki Ikeuchi, Shiomi Kikuchi, Ryota Kondo, Hiroyuki T. Takeshita

    JOURNAL OF ALLOYS AND COMPOUNDS   645   S72 - S75   2015.10

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    DOI: 10.1016/j.jallcom.2015.01.196

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  • Micro/Nano-Structural Transition and Hydrogen Absorption Mechanism in Mg/Cu Super-Laminate Composites

    Koji Tanaka, Hiroyuki T. Takeshita, Ho Shin, Kosuke Kurumatani, Tetsu Kiyobayashi, Nobuhiko Takeichi, Hiroshi Miyamura, Shiomi Kikuchi

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   79 ( 12 )   644 - 650   2015

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/jinstmet.J2015034

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  • A variety of microstructures in Mg/Cu super-laminate composites caused by competitive reactions during hydrogenation Reviewed

    K. Tanaka, K. Shibata, Y. Nishida, K. Kurumatani, R. Kondo, S. Kikuchi, H. T. Takeshita

    17TH INTERNATIONAL CONFERENCE ON TEXTURES OF MATERIALS (ICOTOM 17)   82   2015

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1088/1757-899X/82/1/012078

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  • Formation of MgCu2 from MgH2 and Cu in Pressurized Hydrogen Atmosphere

    Kazuya Shibata, Koji Tanaka, Kosuke Kurumatani, Yasuki Nishida, Ryota Kondo, Hiroyuki T. Takeshita

    MATERIALS TRANSACTIONS   56 ( 6 )   785 - 789   2015

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.M2014426

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  • Micro/Nano-Structural Transition and Hydrogen Absorption Mechanism in Mg/Cu Super-Laminate Composites Reviewed

    Koji Tanaka, Hiroyuki T. Takeshita, Ho Shin, Kosuke Kurumatani, Tetsu Kiyobayashi, Nobuhiko Takeichi, Hiroshi Miyamura, Shiomi Kikuchi

    MATERIALS TRANSACTIONS   55 ( 8 )   1122 - 1128   2014.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.MG201413

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  • Long cycle-life organic electrode material based on an ionic naphthoquinone derivative for rechargeable batteries Reviewed

    Masaru Yao, Tatsuhiro Numoto, Miho Araki, Hisanori Ando, Hiroyuki T. Takeshita, Tetsu Kiyobayashi

    11TH ECO-ENERGY AND MATERIALS SCIENCE AND ENGINEERING (11TH EMSES)   56   228 - 236   2014

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1016/j.egypro.2014.07.153

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  • Hydrogen absorption and desorption behavior of magnesium hydride: Incubation period and reaction mechanism

    Nobuhiko Takeichi, Yasuhiro Sakaida, Tetsu Kiyobayashi, Hiroyuki T. Takeshita

    Materials Transactions   55 ( 8 )   1161 - 1167   2014

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Institute of Metals (JIM)  

    DOI: 10.2320/matertrans.MG201405

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  • The effect of initial structures of Mg/Cu super-laminates on hydrogen absorption/desorption properties

    Koji Tanaka, Hiroyuki T. Takeshita, Kosuke Kurumatani, Hiroshi Miyamura, Shiomi Kikuchi

    JOURNAL OF ALLOYS AND COMPOUNDS   580   S222 - S225   2013.12

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    DOI: 10.1016/j.jallcom.2013.03.155

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  • Conductivity, viscosity and density of MClO4 (M = Li and Na) dissolved in propylene carbonate and gamma-butyrolactone at high concentrations

    K. Kuratani, N. Uemura, H. Senoh, H. T. Takeshita, T. Kiyobayashi

    JOURNAL OF POWER SOURCES   223   175 - 182   2013.2

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    DOI: 10.1016/j.jpowsour.2012.09.039

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  • Hydrogenation Properties of MgCu2: Mechanism of Formation of MgCu2 in Hydrogenation of Mg/Cu Super-Laminate Composites

    Shibata, Kazuya, Tanaka, Koji, Kurumatani, Kosuke, Kondo, Ryota, Takeshita, Hiroyuki T.

    JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS   77 ( 12 )   631 - 635   2013

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/jinstmet.JC201308

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  • Thermodynamic evaluation for formation of MgCu2 from MgH 2 and Cu

    Kazuya Shibata, Koji Tanaka, Kosuke Kurumatani, Yasuki Nishida, Hiroyuki T. Takeshita

    8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8   1   221 - 226   2013

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:John Wiley and Sons Inc.  

    DOI: 10.1007/978-3-319-48764-9_28

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  • Evidence for existence and generality of competitive reactions during hydrogenation of Mg/Cu super-laminate composites

    Koji Tanaka, Hiroyuki T. Takeshita, Kazuya Shibata, Yasuki Nishida, Kosuke Kurumatani, Hiroshi Miyamura, Shiomi Kikuchi

    8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8   1   95 - 101   2013

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:John Wiley and Sons Inc.  

    DOI: 10.1007/978-3-319-48764-9_13

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  • Thermodynamic Property Change in Li-N-H Hydrogen Storage System by Melting Lithium Amide

    Toshihisa Izuhara, Hiroyuki T. Takeshita, Hidekazu Miyake

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   75 ( 2 )   115 - 121   2011.2

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  • Promotional Effect of Aluminum on MgH2+LiBH4 Hydrogen Storage Materials Reviewed

    Young Li, Toshihisa Izuhara, Hiroyuki T. Takeshita

    Materials Transactions   52, (4), pp. 641-646   2011.1

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    The effect of Al addition on the reversibility of a MgH2+2LiBH4 hydrogen storage mixture was examined in order to improve the mixture’s requirement for a hydrogen atmosphere even in dehydrogenation. The experiments using high pressure differential scanning calorimetry and X-ray powder diffraction confirmed that a MgH2+Al+4LiBH4 mixture can reversibly dehydrogenate and rehydrogenate below 773K under mild conditions of 0.1 MPa H2 for dehydrogenation and 4.0 MPa H2 for rehydrogenation. Moreover, thermogravimetry tests revealed that this mixture starts hydrogen desorption at about 530 K, which is 80K lower than the corresponding temperature for the MgH2+2LiBH4 mixture, and desorbs 9.5 mass% of hydrogen below 773 K. Thus, the addition of Al improves not only the reversibility of the reaction but also dehydrogenation kinetics. The hydrogen desorption of the mixture occurs by three steps, which includes the formation of Mg-Al alloys by the reaction of MgH2 and metallic Al followed by the formation of Mg1-xAlxB2 by the reaction of the Mg-Al alloys and LiBH4. Al in this mixture suppresses the formation of metallic Mg and accelerates the formation of Mg1-xAlxB2 from B produced by dehydrogenation of LiBH4. Mg1-xAlxB2 is derived from partial substitution of Al for Mg in MgB2, which contributes to reversible hydrogenation and dehydrogenation of MgH2+2LiBH4.

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  • Multimode hydriding/dehydriding reactions of CaPd

    Kazutaka Ikeda, Noriki Okuda, Kenji Ohoyama, Hai-Wen Li, Hiroyuki T. Takeshita, Toshiya Otomo, Shin-ichi Orimo

    CHEMICAL COMMUNICATIONS   46 ( 44 )   8380 - 8382   2010

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c0cc02626c

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  • 1H and 27AlNMR study of Li[AlH 4] + Ti compounds in solution

    Shou Takeuchi, Hiroshi Senoh, Shu Zhang, Hiroyuki T. Takeshita, Tetsu Kiyobayashi, Qiang Xu, Nobuhiro Kuriyama

    Bulletin of the Chemical Society of Japan   82 ( 6 )   709 - 711   2009

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    DOI: 10.1246/bcsj.82.709

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  • Effect of Ball-Milling on the Properties of Mg2Cu Hydrogen Storage Alloy

    M. X. Tanaka, N. Takeichi, H. T. Takeshita, T. Kiyobayashi

    MATERIALS TRANSACTIONS   49 ( 11 )   2698 - 2701   2008.11

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    DOI: 10.2320/matertrans.MRA2008183

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  • Dehydrogenation kinetics of Ti-doped NaAlH4 - Influence of Ti precursors and preparation methods

    M. Onkawa, S. Zhany, H. T. Takeshita, N. Kuriyama, T. Kiyobayashi

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   33 ( 2 )   718 - 721   2008.1

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    DOI: 10.1016/j.ijhydene.2007.10.002

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  • Observation of hydrogen absorption/desorption reaction processes in Li-Mg-N-H system by in-situ X-ray diffractmetry

    Nakagawa, Tessui, Ichikawa, Takayuki, Iida, Ryo, Leng, Haiyan, Takeichi, Nobuhiko, Kiyobayashi, Tetsu, Takeshita, Hiroyuki, Fujii, Hironobu

    JOURNAL OF ALLOYS AND COMPOUNDS   430 ( 1-2 )   217 - 221   2007

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    DOI: 10.1016/j.jallcom.2006.04.060

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  • Understanding the effect of titanium species on the decomposition of alanates in homogeneous solution

    S Zhang, A Taniguchi, Q Xu, N Takeichi, HT Takeshita, N Kuriyama, T Kiyobayashi

    JOURNAL OF ALLOYS AND COMPOUNDS   413 ( 1-2 )   218 - 221   2006.3

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    DOI: 10.1016/j.jallcom.2005.04.211

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  • Relation between melting and dehydrogenation temperatures of LiAlH4

    HT Takeshita, Y Kamada, A Taniguchi, T Kiyobayashi, K Ichii, T Oishi

    MATERIALS TRANSACTIONS   47 ( 2 )   405 - 408   2006.2

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  • Formation of perovskite-type hydrides and thermal desorption processes in Ca-T-H(T=3d transition metals)

    K. Ikeda, S. Kato, K. Ohoyama, Y. Nakamori, H. T. Takeshita, S. Orimo

    SCRIPTA MATERIALIA   55(9), 827-830.   2006

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  • Hydrogenation properties and structural change of HfxZr7-xNi10 (x=0-7)

    HT Takeshita, N Fujiwara, N Takeichi, H Senoh, T Oishi

    JOURNAL OF ALLOYS AND COMPOUNDS   404   609 - 612   2005.12

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    DOI: 10.1016/j.jallcom.2005.02.080

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  • Studies of p-c isotherms in RNi5-H (R : La, Pr, Nd, Sm, Gd, Tb and Dy) systems

    H Senoh, N Takeichi, T Kiyobayashi, H Tanaka, HT Takeshita, T Oishi, N Kuriyama

    JOURNAL OF ALLOYS AND COMPOUNDS   404   47 - 50   2005.12

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    DOI: 10.1016/j.jallcom.2004.11.112

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  • Structure of nano-crystalline FeTiDx by neutron and X-ray diffraction

    K Itoh, H Sasaki, HT Takeshita, K Mori, T Fukunaga

    JOURNAL OF ALLOYS AND COMPOUNDS   404   95 - 98   2005.12

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    DOI: 10.1016/j.jallcom.2005.01.122

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  • Hydrides with the perovskite structure: General bonding and stability considerations and the new representative CaNiH3

    T Sato, D Noreus, H Takeshita, U Haussermann

    JOURNAL OF SOLID STATE CHEMISTRY   178 ( 11 )   3381 - 3388   2005.11

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    DOI: 10.1016/j.jssc.2005.08.026

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  • Hydrogenation and dehydrogenation properties for DyNi5-H system

    H Senoh, N Takeichi, H Tanaka, T Kiyobayashi, M Toyouchi, HT Takeshita, T Oishi, N Kuriyama

    JOURNAL OF ALLOYS AND COMPOUNDS   389 ( 1-2 )   182 - 185   2005.3

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    DOI: 10.1016/j.jallcom.2004.05.087

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  • Appearance of a novel pressure plateau in RNi5-H (R = rare earth) systems

    H Senoh, T Yonei, HT Takeshita, N Takeichi, H Tanaka, N Kuriyama

    MATERIALS TRANSACTIONS   46 ( 2 )   152 - 154   2005.2

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  • Rare earth-nickel hydrides for high-pressure hydrogen storage materials Reviewed

    Hiroshi Senoh, Nobuhiko Takeichi, Hideaki Tanaka, Nobuhiro Kuriyama, Tasuku Yonei, Hiroyuki T. Takeshita

    Transactions of the Materials Research Society of Japan, Vol 30, No 4   30 ( 4 )   975 - 978   2005

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  • Synthesis of CaNiH3 based hydrides by mechanical alloying Reviewed

    H. T. Takeshita, T. Furuya, H. Miyamura, N. Kuriyama

    Transactions of Materials Research Society of Japan   29(5), 2049-2051   2004.8

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  • Re-examination of Zr7Ni10 single-phase region

    HT Takeshita, S Kondo, H Miyamura, N Takeichi, N Kuriyama, T Oishi

    JOURNAL OF ALLOYS AND COMPOUNDS   376 ( 1-2 )   268 - 274   2004.8

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    DOI: 10.1016/j.jallcom.2004.01.064

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  • Hydrogenation of nanostructured graphite by mechanical grinding under hydrogen atmosphere

    T Kiyobayashi, K Komiyama, N Takeichi, H Tanaka, H Senoh, HT Takeshita, N Kuriyama

    MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   108 ( 1-2 )   134 - 137   2004.4

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    DOI: 10.1016/j.mseb.2003.10.093

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  • Systematic investigation on hydrogen storage properties of RNi5 (R : rare earth) intermetallic compounds with multi-plateau

    H Senoh, N Takeichi, HT Takeshita, H Tanaka, T Kiyobayashi, N Kuriyama

    MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   108 ( 1-2 )   96 - 99   2004.4

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    DOI: 10.1016/j.mseb.2003.10.055

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  • Hydrogenation properties and structure of Ti-Cr alloy prepared by mechanical grinding

    N Takeichi, H Senoh, HT Takeshita, T Oishi, H Tanaka, T Kiyobayashi, N Kuriyama

    MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   108 ( 1-2 )   100 - 104   2004.4

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    DOI: 10.1016/j.mseb.2003.10.057

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  • Hydrogenation and dehydrogenation properties of RHNi5 (R-H = heavy rare earth) binary intermetallic compounds

    H Senoh, T Kiyobayashi, N Takeichi, H Tanaka, Q Xu, HT Takeshita, M Toyouchi, T Oishi, N Kuriyama

    MATERIALS TRANSACTIONS   45 ( 2 )   292 - 295   2004.2

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  • Dehydrogenation process of titanium and zirconium doped alanates Reviewed

    T Kiyobayashi, T Akita, SS Srinivasan, D Sun, S Sangawa, HT Takeshita, CM Jensen, N Kuriyama

    ADVANCED MATERIALS FOR ENERGY CONVERSION II   157 - 164   2004

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  • "Hybrid hydrogen storage vessel", a novel high-pressure hydrogen storage vessel combined with hydrogen storage material

    N Takeichi, H Senoh, T Yokota, H Tsuruta, K Hamada, HT Takeshita, H Tanaka, T Kiyobayashi, T Takano, N Kuriyama

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   28 ( 10 )   1121 - 1129   2003.10

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  • Another unusual phenomenon for Zr7Ni10: structural change in hydrogen solid solution and its conditions

    HT Takeshita, N Fujiwara, T Oishi, D Noreus, N Takeichi, N Kuriyama

    JOURNAL OF ALLOYS AND COMPOUNDS   360 ( 1-2 )   250 - 255   2003.10

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    DOI: 10.1016/S0925-8388(03)00358-X

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  • Hydrogenation properties of RNi5 (R : rare earth) intermetallic compounds with multi pressure plateaux

    H Senoh, N Takeichi, HT Takeshita, H Tanaka, T Kiyobayashi, N Kuriyama

    MATERIALS TRANSACTIONS   44 ( 9 )   1663 - 1666   2003.9

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  • Deterioration behavior of a multi-phase vanadium-based solid solution alloy electrode

    N Kuriyama, M Tsukahara, K Takahashi, H Yoshinaga, HT Takeshita, T Sakai

    JOURNAL OF ALLOYS AND COMPOUNDS   356   738 - 741   2003.8

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    DOI: 10.1016/S0925-8388(03)00163-4

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  • Phase transformation in Ti-Cr alloys by mechanical grinding

    N Takeichi, HT Takeshita, H Tanaka, T Kiyobayashi, N Kuriyama

    MATERIALS LETTERS   57 ( 8 )   1395 - 1399   2003.2

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  • Synthesis of CaNi1-xPdx (0.1 <= x <= 1) alloys and hydrogenation properties of CaPd

    HT Takeshita, Y Sakamoto, N Takeichi, T Kiyobayashi, H Tanaka, N Kuriyama, H Senoh

    JOURNAL OF ALLOYS AND COMPOUNDS   347 ( 1-2 )   231 - 238   2002.12

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  • Hydrogenation of body-centered-cubic titanium-chromium alloys prepared by mechanical grinding

    N Takeichi, HT Takeshita, T Oishi, T Kaneko, H Tanaka, T Kiyobayashi, N Kuriyama

    MATERIALS TRANSACTIONS   43 ( 8 )   2161 - 2164   2002.8

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  • X-ray diffraction studies of titanium and zirconium doped NaAlH4: elucidation of doping induced structural changes and their relationship to enhanced hydrogen storage properties

    DL Sun, T Kiyobayashi, HT Takeshita, N Kuriyama, CM Jensen

    JOURNAL OF ALLOYS AND COMPOUNDS   337   L8 - L11   2002.5

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  • High pressure experiments on the Mg2Ni and Mg2NiH4-H systems Reviewed

    J Chen, T Sakai, N Kitamura, H Tanaka, T Kiyobayashi, H. T. Takeshita, N Kuriyama

    Journal of Alloys and Compounds   330-332   162 - 165   2002.1

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    DOI: 10.1016/S0925-8388(01)01478-5

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  • Evaluation of methods to improve reproducibility in charge/discharge measurements of metal hydride battery electrodes Reviewed

    N. Kuriyama, T. Sakai, H. T. Takeshita, H. Tanaka, T. Kiyobayashi, N. Takeichi, I. Uehara

    Journal of Alloys and Compounds   330-332   771 - 775   2002.1

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    DOI: 10.1016/S0925-8388(01)01433-5

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  • Hydrogen adsorption in carbonaceous materials - How to determine the storage capacity accurately

    T Kiyobayashi, HT Takeshita, H Tanaka, N Takeichi, A Zuttel, L Schlapbach, N Kuriyama

    JOURNAL OF ALLOYS AND COMPOUNDS   330   666 - 669   2002.1

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  • Hydrogenation characteristics of Ti2Ni and Ti4Ni2X (X = O, N, C)

    HT Takeshita, H Tanaka, T Kiyobayashi, N Takeichi, N Kuriyama

    JOURNAL OF ALLOYS AND COMPOUNDS   330   517 - 521   2002.1

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  • Disproportionation of CaNi3 hydride: Formation of new hydride, CaNiH3 Reviewed

    H. T. Takeshita, T. Oishi, N. Kuriyama

    Journal of Alloys and Compounds   333(1-2), pp. 266-273   2002.1

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  • High Pressure Experiments on Hydrogen Storage Materials Reviewed

    J. Chen, T. Sakai, N. Kitamura, H. Tanaka, H. T. Takeshita, T. Kiyobayashi, N. Kuriyama, D. Harimoto, H. Nagai, Y. Fukai

    Journal of Alloys and Compounds   330-332, pp. 162-165   2002.1

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  • Reproducible Evaluation of Characteristics of a Metal Hydride Electrode Composed of MH Powder and Copper Powder Reviewed

    N. Kuriyama, T. Sakai, H. T. Takeshita, H. Tanaka, T. Kiyobayashi, N. Takeichi, I. Uehara

    Journal of Alloys and Compounds   330-332, pp.771-775   2002.1

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  • Activation behavior of AB(2)-type metal hydride electrodes Reviewed

    N Kuriyama, Y Endo, T Sakai, HT Takeshita, H Tanaka, Uehara, I

    FUNDAMENTALS OF ADVANCED MATERIALS FOR ENERGY CONVERSION   55 - 63   2002

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  • Titanium catalyzed mechanism of lithium aluminum hydrides as hydrogen storage materials Reviewed

    J Chen, N Kuriyama, T Kiyobayashi, HT Takeshita, H Tanaka, N Takeichi, T Sakai

    FUNDAMENTALS OF ADVANCED MATERIALS FOR ENERGY CONVERSION   153 - 159   2002

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  • Reversible hydrogen storage via titanium-catalyzed LiAlH4 and Li3AlH6

    J Chen, N Kuriyama, Q Xu, HT Takeshita, T Sakai

    JOURNAL OF PHYSICAL CHEMISTRY B   105 ( 45 )   11214 - 11220   2001.11

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    DOI: 10.1021/jp012127w

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  • Nanocrystalline Ti-doped Li3AlH6 as a reversible hydrogen storage material

    J Chen, N Kuriyama, HT Takeshita, T Sakai

    ADVANCED ENGINEERING MATERIALS   3 ( 9 )   695 - 698   2001.9

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  • A novel thermic process for producing V-based solid solution type hydrogen storage alloy

    A Kawabata, H Yoshinaga, M Tsukahara, T Sakai, S Sakurai, Y Kamiya, K Takahashi, H Takeshita, N Kuriyama, J Shi

    MATERIALS TRANSACTIONS   42 ( 8 )   1794 - 1799   2001.8

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  • High-pressure synthesis of amorphous MgNi1.02H2.2

    J Chen, T Sakai, N Kitamura, HT Takeshita, N Kuriyama

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   123 ( 25 )   6193 - 6194   2001.6

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    DOI: 10.1021/ja010170r

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  • Synthesis and characterization of nanocrystalline Mg2CoH5 obtained by mechanical alloying

    J Chen, HT Takeshita, D Chartouni, N Kuriyama, T Sakai

    JOURNAL OF MATERIALS SCIENCE   36 ( 24 )   5829 - 5834   2001

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  • High pressure synthesis of Mg0.90Al0.08Ni0.94V0.08H1.6

    J Chen, T Sakai, N Kitamura, HT Takeshita, N Kuriyama

    METALS AND MATERIALS-KOREA   6 ( 6 )   605 - 608   2000.12

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  • Reversible hydrogen absorption and desorption achieved by irreversible phase transitions Reviewed

    H. T. Takeshita, T. Kiyobayashi, H. Tanaka, N. Kuriyama, M. Haruta

    Journal of Alloys and Compounds   311(1-2), L1-L4   2000.9

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  • Hydrogenation characteristics of ternary alloys containing Ti4Ni2X (X=O, N, C) Reviewed

    H. T. Takeshita, H. Tanaka, N. Kuriyama, T. Sakai, I. Uehara, M. Haruta

    Journal of Alloys and Compounds   311(1-2), 188-193   2000.9

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  • Hydrogen storage and electrode properties of V-based solid solution type alloys prepared by a thermic process Reviewed

    M. Tsukahara, T. Kamiya, K. Takahashi, A. Kawabata, S. Sakurai, J. Shi, H. T. Takeshita, N. Kuriyama, T. Sakai

    Journal of the Electrochemical Society   147 ( 8 )   2941 - 2944   2000.8

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    DOI: 10.1149/1.1393628

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  • Hydrogen storage alloys with PuNi3-Type structure as metal hydride electrodes

    J Chen, N Kuriyama, HT Takeshita, H Tanaka, T Sakai, M Haruta

    ELECTROCHEMICAL AND SOLID STATE LETTERS   3 ( 6 )   249 - 252   2000.6

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  • A high pressure observation of the Mg2NiH4-H system Reviewed

    J.Chen, T. Sakai, N. Kitamura, H. T. Takeshita, H. Tanaka, N. Kuriyama, D. Harimoto, N. Nagai, Y. Fukai

    Journal of Alloys and Compounds   307(1-2), L1-L5   2000.6

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  • A novel thermic process for producing V-based solid solution type hydrogen storage alloy Reviewed

    A Kawabata, H Yoshinaga, S Sakurai, M Tsukahara, Y Kamiya, K Takahashi, T Sakai, H Takeshita, N Kuriyama, J Shi

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   64 ( 4 )   221 - 226   2000.4

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  • アルミノテルミットプロセスによる高性能V基水素吸蔵合金の製造 Reviewed

    川端章夫, 吉永英雄, 櫻井星児, 塚原誠, 神谷良久, 高橋国男, 境哲男, 竹下博之, 栗山信宏, 石軍

    日本金属学会誌   64(4), 221-226   2000.4

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  • Hydriding properties of LaNi3 and CaNi3 and their substitutes with PuNi3-type structure

    J Chen, HT Takeshita, H Tanaka, N Kuriyama, T Sakai, Uehara, I, M Haruta

    JOURNAL OF ALLOYS AND COMPOUNDS   302 ( 1-2 )   304 - 313   2000.4

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  • Hydrogenation characteristics of Ti4Cu2O

    HT Takeshita, H Tanaka, N Kuriyama, T Sakai, Uehara, I, M Haruta

    JOURNAL OF ALLOYS AND COMPOUNDS   298 ( 1-2 )   114 - 118   2000.2

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  • Rare-earth-based hydrogen storage alloy for batteries Reviewed

    N Kuriyama, T Sakai, H Tanaka, HT Takeshita, Uehara, I

    SECOND INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES   913 - 916   2000

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  • Hydrogen storage and electrode properties of V-based solid solution type alloy prepared by thermic process

    M Tsukahara, Y Kamiya, K Takahashi, A Kawabata, S Sakurai, J Shi, HT Takeshita, N Kuriyama, T Sakai

    INTERCALATION COMPOUNDS FOR BATTERY MATERIALS, PROCEEDINGS   99 ( 24 )   432 - 439   2000

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  • Influence of carbon on electrode properties of V-Ti-Ni type hydrogen storage alloy

    J Shi, M Tsukahara, HT Takeshita, N Kuriyama, T Sakai

    JOURNAL OF ALLOYS AND COMPOUNDS   293   716 - 720   1999.12

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  • Influence of carbon impurity on microstructures and electrode properties for V-based battery alloys

    Jun Shi, Tetsuo Sakai, Hiroyuki T. Takeshita, Nobuhiro Kuriyama, Makoto Tsukahara

    Journal of Alloys and Compounds   290 ( 1-2 )   267 - 272   1999

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    DOI: 10.1016/S0925-8388(99)00210-8

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  • Scanning Tunneling Microscopy In-Situ Observation of Phase-Selective Cathodic Hydrogenation of a V-Ti-Ni-Based Multiphase Alloy Electrode Reviewed

    N. Kuriyama, D. Chartouni, M. Tsukahara, K. Takahashi, H. T. Takeshita, H. Tanaka, L. Schlapbach, T. Sakai, I. Uehara

    Electrochemical and Solid-State Letters   1, 37-38   1998.6

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  • Hydrogenation characteristics of TiFe1 - XPdx (0.05≤x≤0.30) alloys

    I. Yamashita, H. Tanaka, H. Takeshita, N. Kuriyama, T. Sakai, I. Uehara

    Journal of Alloys and Compounds   253-254   238 - 240   1997.5

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    DOI: 10.1016/S0925-8388(96)02925-8

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  • Electrochemical activity enhancement of a LaNi4.7Al0.3 electrode treated with an alkaline solution containing H2O2

    N Kuriyama, T Sakai, H Miyamura, H Tanaka, HT Takeshita, Uehara, I

    JOURNAL OF ALLOYS AND COMPOUNDS   253   598 - 600   1997.5

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  • Quantitative SIMS Analysis of Mo in Ti-Dilute Mo Alloys Using Isotopic Abundance Reviewed

    SUDO Yuichiro, TAKESHITA Hiroyuki T., SUZUKI Ryosuke O., TOMII Yoichi, ONO Katsutoshi

    60(4), 406-411 ( 4 )   406 - 411   1996.4

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  • Quantitative SIMS Analysis of Trace Metallic Impurities in High Purity Copper Reviewed

    TAKESHITA Hiroyuki, KAGAWA Takuya, SUZUKI Ryosuke, OISHI Toshio, ONO Katsutoshi

    60(3), 290-294 ( 3 )   290 - 294   1996.3

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  • Local Quantitative SIMS Analysisi of Small Amount of Oxygen in Titanium Reviewed

    TAKESHITA Hiroyuki T., TOMII Yoichi, SUZUKI Ryosuke O., ONO Katsutoshi

    59(9), 973-977 ( 9 )   973 - 977   1995.9

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  • SIMS Analysis of Light Elements in the Metals.

    Takeshita Hiroyuki, Suzuki Ryosuke, Ono Katsutoshi

    Bulletin of the Japan Institute of Metals   33 ( 4 )   356 - 361   1994

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    Language:Japanese   Publisher:The Japan Institute of Metals and Materials  

    DOI: 10.2320/materia.33.356

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  • 二次イオン質量分析法によるチタン中の微量酸素の定量 Reviewed

    竹下博之, 冨井洋一, 大石敏雄, 小野勝敏

    日本金属学会誌   57(12), 1421-1425 ( 12 )   p1421 - 1425   1993.12

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Books

  • Developement of Hydrogen Storage Materials and its Applications

    TAKESHITA, Hiroyuki T.( Role: Contributor)

    2016.4 

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  • 水素と自動車

    竹下 博之( Role: Sole author)

    工学と技術  2002.11 

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  • SIMSによる金属中の軽元素分析 Reviewed

    竹下博之, 鈴木亮輔, 小野勝敏( Role: Joint author)

    まてりあ  1994.4 

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Presentations

  • Long cycle-life organic electrode material based on an ionic naphthoquinone derivative for rechargeable batteries

    Masaru Yao, Tatsuhiro Numoto, Miho Araki, Hisanori Ando, Hiroyuki T. Takeshit, Tetsu Kiyobayashi

    11th Eco-Energy and Materials Science and Engineering (11th EMSES)  2014.9 

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    The applicability of the redox reactions of 5,8-dihydroxy-1,4-naphthoquinone (1) and its lithium salt, 5,8-dihydroxy-1,4-naphthoquinone dilithium salt (2), as positive electrode active materials for rechargeable lithium batteries was investigated. Theprepared electrodes showed initial discharge capacities of 170 mAh g(1)-1 with an average voltage of 2.2 V vs. Li+/Li, and 247 mAh g(2)-1 with an average voltage of 2.1 V vs. Li+/Li for 1 and 2, respectively. The obtained discharge capacities correspond to their two-electron redox behaviors. While the electrode using 1 suffered from a poor cycle-stability, the one using 2 underwent many cycles; i.e., after a small drop in the capacity at the first cycle, the capacity of the latter electrode hardly decayed during the subsequent 100 cycles. The effects of the introduction of ionic groups on the physical properties including the cycle stability were discussed along with quantum chemistry calculation results.

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  • 加 工 度 が 及 ぼ す Mg-Al 基 合 金 の 水 素 化 層 の 厚 さ へ の 影 響

    佐竹 俊祐, 小田垣 健佑, 近藤 亮太, 竹下 博之, 田中 孝治

    日本金属学会 2014年春期講演大会  2014.3 

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    Venue:東京工業大学 大岡山キャンパス  

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  • Mg/Cu 超 積 層 体 の 水 素 化 時 に お け る 組 織 形 成 に つ い て

    池内 秀規, 柴田 和也, 田中 孝治, 近藤 亮太, 竹下 博之

    日本金属学会 2014年春期講演大会  2014.3 

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    Venue:東京工業大学 大岡山キャンパス  

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  • Pd を (0-1.0)mol% 添 加 し た Ti の 水 素 化 特 性

    近藤 亮太, 宮崎 雄平, 竹下 博之

    日本金属学会 2014年春期講演大会  2014.3 

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    Venue:東京工業大学 大岡山キャンパス  

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  • Long cycle-life organic electrode material based on an ionic naphthoquinone derivative for rechargeable batteries

    YAO Masaru, NUMOTO Tatsuhiro, ARAKI Miho, ANDO Hisanori, TAKESHITA,Hiroyuki T., KIYOBAYASHI Tetsu

    11th Eco-Energy and Materials Science and Engineering (11th EMSES)  2013.12 

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    Venue:Phuket, THAILAND  

    The applicability of the redox reactions of 5,8-dihydroxy-1,4-naphthoquinone (1) and its lithium salt, 5,8-dihydroxy-1,4-naphthoquinone dilithium salt (2), as positive electrode active materials for rechargeable lithium batteries was investigated. Theprepared electrodes showed initial discharge capacities of 170 mAh g(1) -1 with an average voltage of 2.2 V vs. Li+/Li, and 247 mAh g(2) -1 with an average voltage of 2.1 V vs. Li+/Li for 1 and 2, respectively. The obtained discharge capacitiescorrespond to their two-electron redox behaviors. While the electrode using 1 suffered from a poor cycle-stability, the one using 2 underwent many cycles; i.e., after a small drop in the capacity at the first cycle, the capacity of the latter electrode hardly decayed during the subsequent 100 cycles. The effects of the introduction of ionic groups on the physical properties including the cycle stability were discussed along with quantum chemistry calculation results.

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  • Effect of exposure to H2-CO2 gas on dehydrogenation of LiBH4

    Kento Ishizuka, Toyokazu Eguchi, Hiroyuki T. Takeshita

    International Symposium on Metal-Hydrogen Systems -Fundamentals ans Applications-  2012.10 

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    Venue:Kyoto TERRSA, Kyoto, Japan  

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  • About Changes of Hydrogen Absorption/desorption Properties depending on the Initial Structures of Mg/Cu Super-laminates

    Koji TANAKA, Kosuke KURUMATANI, Hiroyuki T. TAKESHITA, Hiroshi MIYAMURA, Shiomi KIKUCHI

    International Symposium on Metal-Hydrogen Systems -Fundamentals and Applications-  2012.10 

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    Venue:Kyoto TERRSA, Kyoto, Japan  

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  • Changing in cycle hydrogenation properties with MgH2/Al ratio in LiBH4-MgH2-Al mixture

    Hiroyuki NAGAI, Youhei ITO, Hiroyuki T. TAKESHITA

    International Symposium on Metal-Hydrogen Systems -Fundamentals and Applications-  2012.10 

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    Venue:Kyoto TERRSA, Kyoto, Japan  

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  • LiNH2 の融解が Li-N-H 系水素貯蔵材料の熱力学的特性に及ぼす影響

    出原稔久, 小林桂子, 竹下博之

    日本金属学会2009年春季大会  2009.3 

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    Venue:東京  

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  • アモルファス相 Mg(NH2)2 の相転移とアンモニア放出特性

    瓶子昌宏, 渡辺秀明, 竹下博之

    日本金属学会2009年春季大会  2009.3 

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    Venue:東京  

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  • 強加工が微細構造及び水素吸蔵・放出特性に与える影響

    田中孝治, 清林 哲, 竹市信彦, 竹下博之, 宮村 弘, 菊池潮美

    日本金属学会2009年春季大会  2009.3 

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    Venue:東京  

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  • 水蒸気で被毒させた錯体水素化物LiBH4の水素放出特性

    池田 誠, 竹下博之

    日本金属学会2008年秋期大会  2008.9 

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    Venue:熊本  

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  • Li-N-H系水素貯蔵材料の結晶子サイズおよび歪へのボールミルの効果

    小林桂子, 高谷将司, 出原稔久, 竹下博之

    日本金属学会2008年秋期大会  2008.9 

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    Venue:熊本  

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  • Li-N-H系水素貯蔵材料の高温での熱力学的特性の変化

    出原稔久, 竹下博之, 小林桂子, 安田 将

    日本金属学会2008年秋期大会  2008.9 

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    Venue:熊本  

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  • The Promotional Effect ofAluminum on the MgH2+LiBH4 Hydrogen Storage Materials

    李 勇, 出原稔久, 野田和俊, 高岡秀年, 佐々木勇介, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • LiBH4-NaAlH4混合物への水蒸気の影響

    池田 誠, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • Mg(NH2)2の結晶性および作製方法がその分解特性に及ぼす影響

    瓶子昌宏, 中村耕生, 出原稔久, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • 積層圧延法を用いたMg系水素貯蔵材料の熱力学的,速度論的問題の改善について

    野田和俊, 佐々木勇介, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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  • アミド・イミド系水素貯蔵材料の水素吸蔵放出特 性に及ぼすサイクル試験温度の影響

    池田慎吾, 中村耕生, 竹下博之, 清林 哲, 栗山信宏, 常世田和彦, 窪川豊之

    2008.3 

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    Venue:東京  

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  • 密度汎関数法によるLiH中のLiおよびHの拡散について

    高岡秀年, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • Li-N-H系水素貯蔵材料における混合方法の 影響Part 2

    小林桂子, 高谷将司, 出原稔久, 竹下博之

    2008.3 

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    Venue:東京  

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  • Li-N-H系水素貯蔵材料の熱力学的特性に及ぼすLiNH2とLiHの混合比の影響

    出原稔久, 三輪篤史, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • Li-N-H系水素貯蔵材料における混合方法の影響Part 2

    小林桂子, 高谷将司, 出原稔久, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • アミド・イミド系水素貯蔵材料の水素吸蔵放出特性に及ぼすサイクル試験温度の影響

    池田慎吾, 中村耕生, 竹下博之, 清林 哲, 栗山信宏, 常世田和彦, 窪川豊之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • CaPd水素化物の構造変化と水素化特性

    池田一貴, 渡辺直希, 奥田法樹, 大山研司, 中森裕子, 折茂慎一, 竹下博之

    日本金属学会2008年春季大会  2008.3 

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    Venue:東京  

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  • Influence of the air exposure in Li-N-H system

    T. H. Izuhara, K. Katayama, H. T. Takeshita

    2007.12 

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  • Li-N-H系水素貯蔵材料における繰り返し水素吸蔵放出特性とNH3発生量

    池田慎吾, 中村耕生, 竹下博之, 清林 哲, 栗山信宏

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • LiAlH4-NaBH4の擬二元系状態図について

    高岡秀年, 竹下博之

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • Li-N-H 系水素貯蔵材料における混合方法の影響

    小林桂子, 出原稔久, 片山和彦, 竹下博之

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • 錯体水素化物 NaAlH4とLiBH4の混合による融点と水素放出温度の低下

    池田 誠, 高岡秀年, 竹下博之

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • LiH, LiNH2混合物の熱分解における水素及びアンモニア放出の速度論的研究

    中村耕生, 竹下博之, 清林 哲, 池田慎吾

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • LiH中のLiOHがLi-N-H系水素貯蔵材料の水素放出特性に及ぼす影響

    出原稔久, 竹下博之, 片山和彦, 小林桂子

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • Pd含有水素吸蔵合金の水素中不純物に対する耐被毒性について

    野田和俊, 小坂和弘, 竹下博之

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • ペロブスカイト水素化物の原子・電子構造と脱水素化反応との相関

    池田一貴, 佐久山誉生, 加藤 賢, 奥田法樹, 中森裕子, 折茂慎一, 湯川 宏, 森永正彦, 竹下博之

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • Ti 添加 NaAlH4 のレーザー顕微鏡による粒状観察と反応速度に関する研究 Part 3

    安達正人, 温川正樹, 竹下博之, 池田慎吾, 清林 哲

    日本金属学会2007年春期大会  2007.3 

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    Venue:千葉  

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  • Ti添加NaAlH4のレーザー顕微鏡による粒状観察と反応速度に関する研究

    安達正人, 温川正樹, 竹下博之, 清林哲

    日本金属学会2006年春季大会  2006 

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  • LiH中のLiOHによるLiH-NH3 反応への影響

    出原稔久, 片山和彦, 小林桂子, 竹下博之

    日本金属学会2006年秋期大会  2006 

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  • メカニカルアロイングにより作製したMg2Cuの水素化特性

    田中万平, 竹下博之, 竹市信彦, 清林 哲

    日本金属学会2006年秋期大会  2006 

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  • LiAlH4とNaBH4の混合による水素放出温度の変化について

    高岡秀年, 井上義之, 竹下博之

    日本金属学会2006年秋期大会  2006 

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  • Ca2Ni7の平衡水素化特性

    野田和俊, 小坂和弘, 竹下博之

    日本金属学会2006年秋期大会  2006 

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  • LiHとNH3の反応における粒径と反応率の関係

    出原稔久, 竹下博之

    2006 

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  • Ti触媒を添加したLiNH2+LiH混合物の電子顕微鏡観察

    飯田 遼, 長峰洋一, 中村耕生, 竹下博之, 清林 哲, 竹市信彦, 田中孝治

    日本金属学会2006年秋期大会  2006 

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  • Ti添加NaAlH4のレーザー顕微鏡による粒状観察と反応速度に関する研究 Part 2

    安達正人, 温川正樹, 竹下博之, 清林 哲, 田中孝治

    日本金属学会2006年秋期大会  2006 

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  • LiH+LiNH2混合物中のTi添加物はどのような作用があるのか

    中村耕生, 飯田 遼, 竹下博之, 栗山信弘, 清林 哲

    日本金属学会2006年秋期大会  2006 

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  • LiHとNH3の反応における粒径と反応率の関係

    出原稔久, 竹下博之

    日本金属学会2006年春季大会  2006 

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  • LiNH2+LiH混合物中の触媒TiCl3は脱水素化・再水素化中にどのように変化するのか

    飯田遼, 竹市信彦, 清林哲, 竹下博之, 中川鉄水

    2006 

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  • Ca2Ni7の水素化特性に関する基礎的研究

    野田和俊, 竹下博之

    水素若手研究会キックオフミーティング  2006 

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  • LiAlH4とLiHを用いたLi3AlH6の合成および水素放出特性

    高岡秀年, 井上義之, 竹下博之

    水素若手研究会キックオフミーティング  2006 

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  • Li-N-H系水素貯蔵材料の水素放出時不純物ガス定量のためのTG-DTA-MS装置開発

    中村耕生, 竹下博之, 陸琤, 栗山信弘, 清林哲

    日本金属学会2006年春季大会  2006 

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  • Ca-Pd系金属間化合物の水素化特性

    松本紀彦, 竹下博之

    日本金属学会2006年春季大会  2006 

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  • Ti添加アラネート脱水素化に関する速度論的研究:試料作製及びTi前駆体の依存性について Part II

    温川正樹, 竹下博之, 安達正人, 清林哲

    日本金属学会2006年春季大会  2006 

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  • Li-N-H系水素貯蔵材料の水素放出時不純物ガス定量のためのTG-DTA-MS装置開発

    中村耕生, 竹下博之, 陸琤, 栗山信弘, 清林哲

    2006 

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  • LiNH2+LiH混合物中の触媒TiCl3は脱水素化・再水素化中にどのように変化するのか

    飯田遼, 竹市信彦, 清林哲, 竹下博之, 中川鉄水

    日本金属学会2006年春季大会  2006 

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  • Ca-Pd系金属間化合物の水素化特性

    松本紀彦, 竹下博之

    水素若手研究会キックオフミーティング  2006 

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  • Mg基合金の水素吸蔵放出特性とその相変態

    田中万平, 竹下博之, 竹市信彦

    日本金属学会2006年春季大会  2006 

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  • M―N―H系水素貯蔵材料のin situ X線回折測定

    中川鉄水, 市川貴之, 飯田 遼, 竹市信彦, 清林 哲, 竹下博之, 藤井博信

    日本金属学会2005年春期大会  2005 

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  • 錯体系水素貯蔵材料における添加物の役割~Tiは触媒か否か~

    谷口暁洋, 清林 哲, 張 庶, 竹下博之, 大石敏雄, 市井一男

    日本金属学会2005年春期大会  2005 

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  • 溶液中でのアラネート脱水素化反応に対するTiの効果

    張 庶, 徐 強, 竹市信彦, 栗山信宏, 清林 哲, 竹下博之, 谷口暁洋

    第15回日本MRS学術シンポジウム  2004 

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  • Effect of Titanium Species in the Dehydrogenation of NaAlH4-Study under Homogenous Conditions

    TAKESHITA,Hiroyuki

    2004 

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  • アラネートのPCI測定における問題点について

    谷口暁洋, 清林哲, 張庶, 竹下博之, 大石敏雄, 市井一男

    日本金属学会2004年秋期大会  2004 

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  • 中性子およびX線回折によるナノFeTiDxの構造観察

    伊藤恵司, 森一広, 福永俊晴, 竹下博之, 佐々木裕行

    日本金属学会2004年秋期大会  2004 

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  • RHNi5(RH:重希土類)合金の水素吸蔵特性

    妹尾博, 竹市信彦, 田中秀明, 栗山信宏, 米井祐, 竹下博之

    日本金属学会2004年秋期大会  2004 

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  • Zr基及びHf基金属間化合物の水素吸蔵特性

    竹市信彦, 田中秀明, 清林哲, 栗山信宏, 妹尾博, 田中万平, 竹下博之

    日本金属学会2004年秋期大会  2004 

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  • 水素雰囲気下でボールミルしたグラファイトの水素状態

    温川正樹, 竹下博之, 清林 哲, 栗山信彦

    第15回日本MRS学術シンポジウム  2004 

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  • 高圧水素貯蔵材料としての希土類―ニッケル水素化物

    妹尾 博, 竹市信彦, 田中秀明, 栗山信宏, 米井 祐, 竹下博之

    第15回日本MRS学術シンポジウム  2004 

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  • 高圧水素下におけるZr基金属間化合物の水素化特性

    竹市信彦, 妹尾 博, 田中秀明, 清林 哲, 田中万平, 竹下博之

    第15回日本MRS学術シンポジウム  2004 

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  • メカニカルグラインディングによるZr7Ni10の結晶構造の変化

    岸田卓也, 竹下博之

    第15回日本MRS学術シンポジウム  2004 

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  • Systematic investigation on hydrogen storage properties of RNi5 (R: Rare Earth) intermetallic compounds with multi-plateau

    H. Senoh, N. Takeichi, H. Tanaka, T. Kiyobayashi, N. Kuriyama, H. T. Takeshita

    E-MRS 2003 Symposium C  2003.6 

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  • Structure and Hydrogenation properties of Zr7Ni10 prepared by quenching

    S. Kondo, N. Fujiwara, H. T. Takeshita, T. Oishi, H. Miyamura, N. Takeichi, T. Kiyobayashi, H. Tanaka, N. Kuriyama

    E-MRS 2003, Symposium C  2003.6 

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  • Hydrogenation properties and structure of Ti-Cr alloy prepared by mechanical grinding

    N. Takeichi, H. Senoh, H. Takanak, T. Kiyobayashi, N. Kuriyama, H. T. Takeshita, T. Oishi

    E-MRS 2003 Symposium C  2003.6 

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  • Hydrogenation of nanostructured graphite by mechanical grinding under hydrogen atmosphere

    T. Kiyobayashi, K. Komiyama, N. Takeichi, H. Tanaka, H. Senoh, H. T. Takeshita, N. Kuriyama

    E-MRS 2003 Spring meeting, Symposium C  2003.6 

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  • Hydrogenation properties of graphite mechanically ground with non-metal mill pot and balls

    H. T. Takeshita, K. Komiyama, T. Kiyobayashi., N. Kuriyama

    International Symposium on Nanotechnology and Materials for the Environment  2003.3 

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    It was reported by Orimo and Fukunaga that mechanical grinding under hydrogen atmosphere significantly enhanced hydrogen storage capacity of graphite [1]. In order to clarify the mechanism, the effect of materials of mill pots and balls on the hydrogenation properties of graphite was investigated. Two kinds of pots and balls were used for the milling of graphite under hydrogen atmosphere of 0.6MPa; the one was made of Cr steel and the other was made of agate. The graphite prepared in Cr steel pot exhibited the hydrogen storage capacity of 2.2 mass%, indicating the enhancement of hydrogen storage capacity of graphite by ball milling, although the value was smaller than that reported (7.4 mass%) [1], whereas, interestingly, the graphite milled with agate balls in the agate pot exhibited very small hydrogen storage capacity (0.1 to 0.2 mass%). Further experiments were performed to clarify the effect of particle size and metal impurity on the hydrogen storage capacity of nano-structured graphite. The results will be reported in the Poster session in details. [1]S. Orimo, T. Matsushima, H. Fujii, T. Fukunaga, G. Majer, J. Appl. Phys., 90 (2001), 1545.

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  • 水素吸蔵合金による水素の貯蔵とその応用

    竹下 博之

    水素エネルギーの製造・貯蔵・利用と水素インフラの展望  2002.11 

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    1.水素吸蔵合金による水素の貯蔵法 (1)水素吸蔵合金の種類と特徴 ①希土類系水素吸蔵合金 ②ラーベス相水素吸蔵合金 ③BCC系水素吸蔵合金 ④その他 (2)水素吸蔵合金の技術課題と対応のポイント ①水素吸収特性に及ぼす要素 ②水素密度、安全性2.水素吸蔵合金による水素貯蔵技術の応用のポイント (1)燃料電池自動車 (2)水素ステーション (3)その他

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  • The Hydrogenation of Ti-Cr Alloys With BCC Structure Prepared By Mechanical Grinding

    N. Takeichi, H. T. Takeshtia, T. Kaneko, T. Oishi, H. Tanaka, T. Kiyobayashi, N. Kuriyama

    International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications  2002.9 

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  • X-ray Diffraction and Solid NMR Studies of Doped NaAlH4: Fundamental Insights into a Promissing New Hydrogen Storage Material

    D. Sun K, K. Kumashiro, W. Niemczura, K. Murphy, T. Kiyobayashi, H. T. Takeshita, N. Kuriyama, C. M. Jensen

    International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications  2002.9 

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  • Impedance Spectroscopy of a Vanadium-Based Solid Solution Alloy Electrode

    N. Kuriyama, M. Tsukahara, K. Takahashi, H. Yoshinaga, H. T. Takeshita, T. Sakai

    International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications  2002.9 

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  • Hydrogen Storage Properties of AB5-Type Alloys at High Hydrogen Pressure

    H. Senoh, H. T. Takeshita, N. Takeichi, H. Tanaka, T. Kiyobayashi, N. Kuriyama

    International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications  2002.9 

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  • Hydrogen Assisted Phase Transition of Zr7Ni10

    H. T. Takeshita, D. Noreus. N. Takeichi, T. Kiyobayashi, H. Tanaka, N. Kuriyama

    International Symposium on Metal-Hydrogen Systems: Fundamental and Applications  2002.9 

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  • X-ray Diffarction and Solid NMR Studies of Doped NaAlH4: Fundamental Insights into a Promising New Hydrogen Storage Material

    D. Sun, K. K. Kumashiro, W. Niemczura, K. Murphy, T. Kiyobayashi, H. T. Takeshita, N. Kuriyama, C. M. Jensen

    International Symposium on Metal-Hydrogen Systems: Fundamental and Applications  2002.9 

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  • Hydrogenation property of CaPd2: Exception to HIA criterion?

    H. T. Takeshita, Y. Sakamoto, H. Tanaka, N. Takeichi, T. Kiyobayashi, H. Senoh, N. Kuriyama

    International Symposium on Metal-Hydrogen Systems: Fundamental and Applications  2002.9 

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  • Structural change of hydrogen solid solution phase of Zr7Ni10

    N. Fujiwara, H. T. Takeshita, K. Sakaki, T. Oishi, Y. Shirai

    International Symposium on Metal-Hydrogen Systems: Fundamental and Applications  2002.9 

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Awards

  • Best poster award

    1996.8   Committee of MH symposium  

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  • Student Award

    1993.11   Committee of symposium of SIMS-IX  

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Research Projects

  • Microstructural research of internal MgH2 in Mg for rapid responnce and high capacity Mg base hydrogen storage materials

    Grant number:17K14837  2017.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    Kondo Ryota, TAKESHITA Hiroyuki, OBORA Yasushi

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    This study revealed relationship between microstructure of MgH2 and surface treatment, hydrogenation condition, catalyst, and grain boundary of Mg. Ti-based alloys possessed catalytic effect and the effects were investigated with chemical reactions.

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  • Development of high performance laminate type hydrogen storage alloys by using extreme severe plastic deformation (ESPD) and hydrogenation disproportionation desorption recombination (HDDR)

    Grant number:15K06519  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Tanaka Koji

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    Grant amount:\4810000 ( Direct Cost: \3700000 、 Indirect Cost:\1110000 )

    It is found that the growth rate constants of Mg2Cu in Mg/Cu super-laminate composites (SLCs) is approximately ten to the second - forth order larger than that of Mg-Cu diffusion couples. It is because that extreme severe plastic deformation such as accumulative roll bonding (ARB) with more than 5 cycles can enhance atomic diffusion and promote solid-state reactions because of an increase in the density of lattice defects such as vacancies, dislocations and grain boundaries. It is also found that hydrogenation of Mg was dominant in Mg/Cu SLCs during initial hydrogenation of Mg/Cu SLCs when Mg was thick, whereas that of Mg2Cu was dominant in Mg/Cu SLCs when Mg was thin. It is considered that the average thickness of Mg + Cu layers in as-rolled Mg/Cu SLCs as a function of ARB cycles has a large influence on initial hydrogenation properties and microstructure formation processes.

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  • Comprehensive research about an extraction of improving factor for hydrogen absorption/desorption properties and high functionality of laminate type hydrogen storage alloys

    Grant number:23560794  2011 - 2013

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    KOJI Tanaka, TAKESHITA Hiroyuki, MIYAMURA Hiroshi

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    Grant amount:\5200000 ( Direct Cost: \4000000 、 Indirect Cost:\1200000 )

    3 reactions have happened during the initial hydrogenation of Mg/Cu super-laminate composites: (1) a hydrogenation of Mg, (2) an alloying Mg with Cu to Mg2Cu, (3) a hydrogenation of Mg2Cu formed through an alloying Mg with Cu. There exist 3 reaction processes depending on the timing of the reaction (1). : The reaction (1) occurs earlier than the reaction (2), earlier than the reaction (3), or later than the reaction (3). The three reaction processes make 3 types of microstructures different from each other. And about a hydrogenation of Mg, an incubation time does not appear although a clear incubation time appears during a dehydrogenation of MgH2.

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  • 水素貯蔵用錯体水素化物の反応速度改善に関する基礎的研究

    2005 - 2007

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    Grant type:Competitive

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  • Study for improvement of reaction rate of inorganic complex hydrides by forming fluid state

    2003 - 2005

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    Grant type:Competitive

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  • 触媒により活性化されたアラネート水素化物の被毒に関する研究

    Grant number:15760529  2003 - 2005

    日本学術振興会  科学研究費助成事業  若手研究(B)

    竹下 博之

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    Grant amount:\3800000 ( Direct Cost: \3800000 )

    アラネート水素化物は禁水性物質であり、水蒸気を含む雰囲気に被毒され、水素吸収、放出特性が劣化することが予想される。特に触媒を添加した状態では非常に活性であり、この傾向が顕著になると考えられる。そこで、水蒸気及び酸素を含む雰囲気下でのアラネート水素化物の劣化について検討を行った。
    昨年度はNaAlH_4を対象として検討を行ったが、今年度はより計量で水素貯蔵量の大きいLiAlH_4を対象として検討を行った。LiAlH_4試料としては、95%の純度を有する試薬を精製して純度を高めたものを使用した。まず、-87℃の露点まで乾燥させたアルゴン雰囲気中試料を3日間以上1週間以内保管した場合には、明瞭な劣化傾向は認められなかった。次に、脱水処理を行わなかったアルゴン雰囲気下でボールミルにより強制的に攪拌を行った後、被毒の効果を示差走査熱量分析計を用いて水素雰囲気下で調べたところ、乾燥雰囲気下で保管された試料には認められなかった酸化が140〜150℃の温度範囲にかけて認められた。200℃までの昇温・降温を3回ほど繰り返したが、2回目以降には装置の検出感度範囲内で被毒反応は認められなかった。次にこの試料を50cc/min.の流量の酸素を微量に含むアルゴンガス雰囲気下で200℃まで昇温した場合には、LiAlH_4の融解と水素放出反応(LiAlH_4→Li_3AlH_6)が認められ、それ以外に明瞭なピークは認められなかったが、分析後の試料の構成相を確認したところ、LiOHの存在が認められた。

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  • 触媒添加Li3AlH6の水素化特性に関する研究

    2003 - 2005

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    Grant type:Competitive

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  • Research of new X-TM-Y alloys (X=Ca, Mg, Li; TM=transition metals; Y=metals)

    2002 - 2006

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  • Study on Ca-based hydrogen storage alloys

    2002 - 2004

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    Grant type:Competitive

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  • Basic research on combined interstitial-complex hydrides

    2002 - 2003

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    Grant type:Competitive

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  • Hydrogenation properties of martensitic TiNi-based alloys

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    Grant type:Competitive

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Social Activities

  • 水素貯蔵材料研究小委員会 委員

    2002 - 2003

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  • International Energy Agency, Task 17, Expert

    2001 - 2006

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  • WE-NETタスク11 水素貯蔵材料の開発委員会 委員

    2000 - 2003

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Devising educational methods

  • より専門的な教育内容につながる基礎科目については、授業時間内に可能な限り演習の時間を取り入れることにより、受講生が、ホップ(授業)→ステップ(演習)→ジャンプ(期末試験)と無理なく内容を理解・修得できるよう配慮した。演習や宿題については、解答を公開するだけでなく、考え方や解答上の留意点なども示すことにより、受講生が内容をより深く理解するように努めた。 実験科目に関しては、その内容を検討する委員会にて定期的に検討を行うとともに、受講生に対するアンケート内容を分析評価して改善策を立て、その内容を受講生に対して説明する等、PDCAの仕組みを作り、スパイラルアップのための取り組みを継続的に行っている。

Teaching materials

  • ・マテリアル科学実験(2011年度)、マテリアル工学実験(2011年度)…共同執筆。 2年生、3年生向けの主として金属・セラミックス材料に関わる実験用のテキストである。実験だけでなく、レポート作成のための手引き等も付属し、実験の報告書の作成方法を受講生が理解できるよう配慮されている。

Teaching method presentations

  •  特になし

Special notes on other educational activities

  • 主担当のコースである「マテリアル科学コース」は、その教育プログラムがJABEEの認定を受けており、継続的に教育プログラムのPDCAに取り組んでいる。