Production of hydrogen absorption materials under the supercritical state

• Project/Area Number: 23656384
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals
• Research Institution: Kyoto University
• Principal Investigator: FUKUNAGA Toshiharu 京都大学, 原子炉実験所, 教授 (60142072)
• Co-Investigator(Kenkyū-buntansha): MORI Kazuhiro 京都大学, 原子炉実験所, 准教授 (40362412)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 原子 / 電子構造 / ナノ化 / メカニカルミリング / 中性子散乱 / 小角散乱 / 表面構造 / ナノ構造 / Ｘ線回折 / 原子配列 / 中性子小角散乱 / X線回折

Research Abstract

This study is designed to improve the absorption and desorption properties of hydrogen in present hydrogen storage materials and to invent an out-of-the-box hydrogen storage materialby using nano-technology. In this study, the surface of the nano-porous material is a key point to improve the absorption and desorption properties of hydrogen and disperse the strain. The surface structure and its change during the hydrogen absorption and desorption process was investigated by the advantage of the neutron small angle scattering (SANS). In the ex- and in-situ SANS experiments on nano Ti0.31Cr0.33V0.36, the relationship between the surface fractal dimension Ds and the hydrogen content H/M was studied. This variation of Ds with H/M was explained by considering the volume expansion in the crystal structure. When we use D instead of H, the surface morphology became to be much different. The result allows us to get new information that the diffusion rate of H is faster than that of D in the surface of nano-particles.

Research Products

• [Journal Article] 中性子小角散乱によるTi-Cr-V水素吸蔵合金の表面構造観察 (2013)
  • Author(s): 森一広、岩瀬謙二、大場洋次郎、杉山正明、福永俊晴
  • Journal Title: 京都大学原子炉実験所「第47回学術講演会報文集」 Volume: 47 Pages: 152-155
  • URL: http://www.rri.kyoto-u.ac.jp/wp-content/uploads/houbunsyu47.pdf
• [Journal Article] 中性子小角散乱によるTi-Cr-V水素吸蔵合金の表面構造観測 (2013)
  • Author(s): 森一広、岩瀬謙二、大場洋次郎、杉山正明、福永俊晴
  • Journal Title: 京都大学原子炉実験所「第47回学術講演会報文集」 Volume: 47 Pages: 152-155
• [Journal Article] Neutron scattering studies of Ti-Cr-V bcc alloy with the residual hydrogen and deuterium (2012)
  • Author(s): K. Mori, K. Iwase, M. Sugiyama, M. Kofu, O. Yamamuro, Y. Onodera, T. Otomo, and T. Fukunaga
  • Journal Title: J. Phys: Couference Series Volume: 340 Pages: 12103-12103
  • DOI: 10.1088/1742-6596/340/1/012103
  • Peer Reviewed
• [Presentation] 中性子小角散乱によるTi-Cr-V水素吸蔵合金の表面構造観測 (2013)
  • Author(s): 森一広、岩瀬謙二、大場洋次郎、杉山正明、福永俊晴
  • Organizer: 第47回京都大学原子炉実験所学術講演会
  • Place of Presentation: 熊取、日本
• [Presentation] Surface and bulk structures of hydrogenated Ti-Cr-V alloy studied by neutron scattering (2012)
  • Author(s): K. Mori, M. Sugiyama, Y. Nishikawa, K. Iwase, M. Hartl, R. Hjelm, T. Fukunaga
  • Organizer: International Symposium on Metal-Hydrogen System (MH2012)
  • Place of Presentation: Kyoto, Japan
• [Presentation] Microstructure of hydrogen storage alloy (2011)
  • Author(s): Y. Nishikawa, M. Sugiyama, K. Mori, K. Iwase and T. Fukunaga
  • Organizer: Ti-Cr-V alloy studied by SANS1st Asia-Oceania Conference on Neutron Scattering
  • Place of Presentation: Tsukuba International Congress Center (Ibaragi Prefecture), Japan
  • Year and Date: 2011-11-23
• [Presentation] Structural and dynamics studies of hydrogen absorbing Ti-Cr-V alloy (2011)
  • Author(s): K. Mori, M. Sugiyama, T. Fukunaga, K. Iwase, M. Kofu, O. Yamamuro
  • Organizer: 21th Academic Symposium of MRS Japan 2011 (Session C, International Session)
  • Place of Presentation: Yokohama
• [Presentation] Structural and dynamics studies of hydrogen storage alloy: Ti-Cr-V (2011)
  • Author(s): K. Mori, K. Iwase, M. Sugiyama, Y. Nishikawa, M. Kofu, O. Yamamuro, M. Hartl, T. Otomo, T. Fukunaga
  • Organizer: 5th European Conference on Neutron Scattering
  • Place of Presentation: Prague, Czech Republic
• [Presentation] Microstructure of hydrogen storage alloy, Ti-Cr-V alloy studied by SANS (2011)
  • Author(s): Y. Nishikawa, M. Sugiyama, K. Mori, K. Iwase and T. Fukunaga
  • Organizer: 1st Asia-Oceania Conference on Neutron Scattering
  • Place of Presentation: Tsukuba International Congress Center (Ibaragi Prefecture), Japan
• [Remarks]
  • URL: http://www.rri.kyoto-u.ac.jp/FukunagaLab/