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Proceedings Paper

X-ray characterization of short-pulse laser illuminated hydrogen storage alloys having very high performance
Author(s): Hiroyuki Daido; Hiroshi Abe; Takahisa Shobu; Takuya Shimomura; Shinnosuke Tokuhira; Yusuke Takenaka; Takehiro Furuyama; Akihiko Nishimura; Hirohisa Uchida; Takeshi Ohshima
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Paper Abstract

Hydrogen storage alloys become more and more important in the fields of electric energy production and stage and automobiles such as Ni-MH batteries. The vacancies introduced in hydrogen absorption alloy by charged particle beams were found to be positive effect on the increase in the initial hydrogen absorption reaction rate in the previous study. The initial reaction rates of hydrogen absorption and desorption of the alloy are one of the important performances to be improved. Here, we report on the characterization of the hydrogen absorption reaction rate directly illuminated by a femtosecond and nanosecond lasers instead of particle beam machines. A laser illuminates the whole surface sequentially on a tip of a few cm square LaNi4.6Al0.4 alloy resulting in significant improvement in the hydrogen absorption reaction rate. For characterization of the surface layer, we perform an x-ray diffraction experiment using a monochromatized intense x-ray beam from SPring-8 synchrotoron machine.

Paper Details

Date Published: 22 September 2015
PDF: 6 pages
Proc. SPIE 9589, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI, 95890K (22 September 2015); doi: 10.1117/12.2186898
Show Author Affiliations
Hiroyuki Daido, Japan Atomic Energy Agency (Japan)
Hiroshi Abe, Japan Atomic Energy Agency (Japan)
Takahisa Shobu, Japan Atomic Energy Agency (Japan)
Takuya Shimomura, Japan Atomic Energy Agency (Japan)
Shinnosuke Tokuhira, Tokai Univ. (Japan)
Yusuke Takenaka, A-Tech Co., Ltd. (Japan)
Takehiro Furuyama, A-Tech Co., Ltd. (Japan)
Akihiko Nishimura, Japan Atomic Energy Agency (Japan)
Hirohisa Uchida, Tokai Univ. (Japan)
Takeshi Ohshima, Japan Atomic Energy Agency (Japan)

Published in SPIE Proceedings Vol. 9589:
X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI
Annie Klisnick; Carmen S. Menoni, Editor(s)

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