Investigation of micro-structural transition through disproportionation and recombination during hydrogenation and dehydrogenation in Mg/Cu super-laminates View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2008-03-06

AUTHORS

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

ABSTRACT

Micro/nano-structures and hydrogen storage properties of Mg/Cu super-laminates were investigated. Mg/Cu super-laminates showed reversible hydrogenation and dehydrogenation at 473 K. In order to clarify the process of hydrogenation and dehydrogenation at 473 K, we performed TEM observations of micro/nano-structures of the Mg/Cu super-laminates and Mg2Cu powder prepared by conventional casting method. TEM observations revealed that the as-rolled Mg/Cu super-laminates had laminated structures in size of sub-micrometer thickness composed of Mg and Cu layers with dense lattice defects. The super-laminates after initial activation kept laminated structures and had uniformly distributed pores with a sub-micrometer diameter. On the other hand, the cast Mg2Cu powder after initial activation had pores only beneath the surface oxide layers. 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. More... »

PAGES

3812-3816

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10853-007-2134-4

DOI

http://dx.doi.org/10.1007/s10853-007-2134-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1041712102


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