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Microscopic characterization of metal-carbon-hydrogen composites (metal = Li, Mg)

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Title: Microscopic characterization of metal-carbon-hydrogen composites (metal = Li, Mg)
Authors: Isobe, Shigehito Browse this author →KAKEN DB
Yamada, Sumito Browse this author
Wang, Yongming Browse this author
Hashimoto, Naoyuki Browse this author
Ohnuki, Somei Browse this author →KAKEN DB
Miyaoka, Hiroki Browse this author
Ichikawa, Takayuki Browse this author →KAKEN DB
Kojima, Yoshitsugu Browse this author
Issue Date: 7-Sep-2013
Publisher: American Institute of Physics
Journal Title: Journal of applied physics
Volume: 114
Issue: 9
Start Page: 093509-1
End Page: 093509-7
Publisher DOI: 10.1063/1.4820455
Abstract: Li-C-H system, which can store about 5.0 mass% of rechargeable H-2, has been reported as a promising hydrogen storage system by Ichikawa et al. [Appl. Phys. Lett. 86, 241914 (2005); Mater. Trans. 46, 1757 (2005)]. This system was investigated from the thermodynamic and structural viewpoints. However, hydrogen absorption/desorption mechanism and the state of hydrogen atoms absorbed in the composite have not been clarified yet. In order to find new or better hydrogen storage system, graphite powder and nano-structural graphite ball-milled under H-2 and Ar atmosphere were prepared and milled with Li and Mg under Ar atmosphere in this study. Microstructural analysis for those samples by transmission electron microscope revealed that LiC6 and/or LiC12 were formed in Li-C-H system. On the other hand, MgC2 was found in Mg-C-H system ball-milled under H-2 atmosphere, but not in the system ball-milled under Ar atmosphere. These results indicated that nano-structure in composites of nano-structural graphite is different from that of alkali (-earth) metal. For these reasons, metal-C-H system can be recognized to be a new family of hydrogen storage materials. (C) 2013 AIP Publishing LLC.
Rights: Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics 114, 093509 (2013) and may be found at
Type: article
Appears in Collections:創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 礒部 繁人

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