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ID 25964
本文ファイル
著者
Isobe, Shigehito
Leng, Haiyan
Fujii, Hironobu
キーワード
Inorganic compounds
Chemical synthesis
Thermogravimetric analysis (TGA)
X-ray diffraction
Thermodynamic properties
NDC
化学
抄録(英)
Li-Mg-N-H systems composed of Mg(NH2)2 and LiH with various ratios can reversibly store a large amount of hydrogen under the temperature condition above 150 °C. These composites with 3:6, 3:8 and 3:12 ratio of Mg(NH2)2 and LiH have been independently reported by four groups as promising candidates of high performance hydrogen storage materials possessing the reversibility and the high capacity. In any cases, an interaction between NH3 and LiH plays an important role for the progress of hydrogen desorbing and absorbing reactions. For the hydrogen desorption process, the NH3 molecule generated from Mg(NH2)2 reacts with LiH, forming LiNH2 and H2. Especially, under an equilibrium condition, in-situ diffraction results indicated that the single phase of LiNH2•MgNH (LiMgN2H3) could be generated other than the separated two phases. As a next step, the NH3 molecule generated from LiNH2 reacts with LiH, desorbing H2. As a result, the dehydrogenated phase was evaluated to be Li2NH•MgNH (Li2MgN2H2) or separated two phases, in which the final phase should depend on the experimental conditions. Thus, if the amount of LiH is enough to react with NH3, the hydrogen desorption processes are described by the NH3 generation from the corresponding amides and the imide.
掲載誌名
Journal of Physics and Chemistry of Solids
69巻
9号
開始ページ
2234
終了ページ
2236
出版年月日
2008-09
出版者
Pergamon
Elsevier Science Ltd.
ISSN
0022-3697
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2008 Elsevier Ltd
関連情報URL
部局名
先進機能物質研究センター