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Relations between Microstructure of Mg/Cu Super-laminates and Kinetics of Hydrogen Absorption/desorption

Published online by Cambridge University Press:  26 February 2011

Koji Tanaka ,
Nobuhiko Takeichi ,
Hideaki Tanaka ,
Nobuhiro Kuriyama ,
Tamotsu T. Ueda ,
Makoto Tsukahara ,
Hiroshi Miyamura  and
Shiomi Kikuchi
Koji Tanaka
Affiliation:
[email protected], National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Ubiquitous Energy Devices, 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan, +81-727-751-9061, +81-727-751-9741
Nobuhiko Takeichi
Affiliation:
[email protected], National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
Hideaki Tanaka
Affiliation:
[email protected], National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
Nobuhiro Kuriyama
Affiliation:
[email protected], National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan
Tamotsu T. Ueda
Affiliation:
[email protected], IMRA Material R&D Co.Ltd., 5-50 Hachiken-cho, Kariya, Aichi, 448-0021, Japan
Makoto Tsukahara
Affiliation:
[email protected], IMRA Material R&D Co.Ltd., 5-50 Hachiken-cho, Kariya, Aichi, 448-0021, Japan
Hiroshi Miyamura
Affiliation:
[email protected], University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
Shiomi Kikuchi
Affiliation:
[email protected], University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
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Abstract

Super-laminates have been attracting attention since co-authors Ueda et al. reported that Mg/Cu super-laminates showed reversible hydrogenation and dehydrogenation at 473K. The Mg/Cu super-laminates were prepared by a repetitive fold and roll method. Initial activation at 573 K led the super-laminates to absorb hydrogen at 473K. TEM observations of micro/nano-structures in the super-laminates were performed in order to clarify the process of hydrogenation and dehydrogenation at 473K, The as-rolled Mg/Cu super-laminates have laminated structures in size of sub-micrometer thickness composed of Mg and Cu layers with dense lattice defects. The super-laminates after initial activation keep laminated structure and have uniformly distributed pores with a sub-micrometer diameter. It is considered that these micro/nano-structures of Mg/Cu super-laminates lead to lower dehydrogenation temperature and better kinetics, which would contribute to achieve high performance hydrogen storage materials.

Keywords

microstructureMgH
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 971: Symposium Z – Hydrogen Storage Technologies , 2006 , 0971-Z07-06
Copyright
Copyright © Materials Research Society 2007

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