Hydrogen absorption properties of Li-Mg-N-H system

Journal of Alloys and Compounds 400 巻 1-2 号 245-248 頁 2005-09-01 発行
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タイトル ( eng )
Hydrogen absorption properties of Li-Mg-N-H system
作成者
Tokoyoda Kazuhiko
Leng Haiyan
Fujii Hironobu
収録物名
Journal of Alloys and Compounds
400
1-2
開始ページ 245
終了ページ 248
抄録
Isothermal hydrogen absorption properties of the ball milled mixture of 3Mg(NH2)2 and 8LiH after dehydrogenation at 200 °C under high vacuum were investigated at two different temperatures of 150 and 200 °C. The pressure –composition isotherm (PCT) curve at 200 °C revealed a two-plateaus-like behavior, while the PCT curve at 150 °C showed a single-plateau-like behavior. The hydrogenated phases were composed of LiH and Mg(NH2)2 under 9 MPa at 200 °C, while those were observed as mixed phases of LiH and LiNH2 at 150 °C without any trace of Mg(NH2)2 in XRD measurements. These results indicate that there are 2 step hydrogenation processes corresponding to high and low pressures at 200 °C, but the kinetics at 150 °C is too slow to proceed with the second hydrogenating step at high pressure region.
著者キーワード
Hydrogen storage materials
Gas-solid reactions
High-energy ball milling
Mechanochemical synthesis
Thermal analysis
NDC分類
物理学 [ 420 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Elsevier B.V.
発行日 2005-09-01
権利情報
Copyright (c) 2005 Elsevier B.V.
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0925-8388
[DOI] 10.1016/j.jallcom.2005.03.068
[NCID] AA10817249
[DOI] http://dx.doi.org/10.1016/j.jallcom.2005.03.068