Issue 32, 2011
From the journal:

Dalton Transactions

Correlation between composition and hydrogen storage behaviors of the Li2NH-MgNH combination system†

Yongfeng Liu,a   Bo Li,a   Fangfang Tu,a   Chu Liang,a   Mingxia Gao,a   Hongge Pan*a  and  Qidong Wanga  

* Corresponding authors

a State Key Laboratory of Silicon Materials & Department of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
E-mail: hgpan@zju.edu.cn
Fax: +86 571 87952615
Tel: +86 571 87952615

Abstract

Hydrogen storage performances of a Li2NH-xMgNH combination system (x = 0, 0.5, 1 and 2) are investigated for the first time. It is found that the hydrogenated samples with MgNH exhibit a significant reduction in the dehydrogenation temperatures. Mechanistic investigations reveal that there is a strong dependence of the hydrogen storage reaction process on the molar ratio between MgNH and Li2NH. As a consequence, tuning of thermodynamics is achieved for hydrogen storage in the Li2NH-xMgNH system by changing the reaction routes, which is ascertained to be the primary reason for the reduction in the operating temperature for hydrogen desorption. Specifically, it is found that under 105 atm hydrogen (140–280 °C) 5.6 wt% hydrogen is reversibly stored in the Li2NH-0.5MgNH combination system, which is greater than in the well-investigated Mg(NH2)2-2LiH system.

Graphical abstract: Correlation between composition and hydrogen storage behaviors of the Li2NH-MgNH combination system

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Article information

DOI
https://doi.org/10.1039/C1DT10108K
Article type
Paper
Submitted
19 Jan 2011
Accepted
24 May 2011
First published
04 Jul 2011

Dalton Trans., 2011,40, 8179-8186

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Correlation between composition and hydrogen storage behaviors of the Li2NH-MgNH combination system

Y. Liu, B. Li, F. Tu, C. Liang, M. Gao, H. Pan and Q. Wang, Dalton Trans., 2011, 40, 8179 DOI: 10.1039/C1DT10108K

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