Micro/Nano-Structures and Hydrogen Absorption/Desorption Properties of Mg/Cu Super-Laminates

Koji Tanaka; Tetsu Kiyobayashi; Nobuhiko Takeichi; Hiroshi Miyamura; Shiomi Kikuchi

doi:10.4028/www.scientific.net/MSF.638-642.1143

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HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Micro/Nano-Structures and Hydrogen...

Micro/Nano-Structures and Hydrogen Absorption/Desorption Properties of Mg/Cu Super-Laminates

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 Mg/Cu 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 sub-micrometer thick composed of Mg and Cu layers with dense lattice defects. The super-laminates after initial activation keep laminated structure and have uniformly distributed pores sub-micrometer in 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 638-642)

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1143-1147

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.1143

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Online since:

January 2010

Authors:

Koji Tanaka, Tetsu Kiyobayashi, Nobuhiko Takeichi, Hiroshi Miyamura, Shiomi Kikuchi

Keywords:

Absorption, Desorption, Hydrogen, Mg₂Cu, Microstructure, Nanostructure, Storage, Super-Laminates

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