Comparison between Mg/Cu Super-Laminates and Mg2Cu Powder in Microstructure and Hydrogen Storage Properties

Koji Tanaka; Nobuhiko Takeichi; Hideaki Tanaka; Nobuhiro Kuriyama; Tamotsu T. Ueda; Makoto Tsukahara; Hiroshi Miyamura; Shiomi Kikuchi

doi:10.4028/www.scientific.net/MSF.561-565.1581

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Comparison between Mg/Cu Super-Laminates and Mg2Cu...

Comparison between Mg/Cu Super-Laminates and Mg₂Cu Powder in Microstructure and Hydrogen Storage Properties

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 and Mg2Cu powder 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.

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Materials Science Forum (Volumes 561-565)

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1581-1584

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.1581

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Online since:

October 2007

Authors:

Koji Tanaka, Nobuhiko Takeichi, Hideaki Tanaka, Nobuhiro Kuriyama, Tamotsu T. Ueda, Makoto Tsukahara, Hiroshi Miyamura, Shiomi Kikuchi

Keywords:

Hydrogen, Mg₂Cu, Microstructure, Storage, Super-Laminates

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