Synthesis and hydriding properties of Li2Mg(NH)2

被引：18

作者：

Markmaitree, Tippawan ^{[1
]}

Shaw, Leon L. ^{[1
]}

机构：

[1] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 07期

关键词：

Hydrogen storage materials; Li-Mg ternary imide; Kinetics; Hydrogenation; MG-N-H; HYDROGEN STORAGE PROPERTIES; SYSTEM; LINH2-MGH2; LIH;

D O I：

10.1016/j.jpowsour.2009.09.067

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase pure Li2Mg(NH)(2) has been synthesized via a dehydriding treatment of a ball milled 2LiNH(2) + MgH2 mixture. This phase pure Li2Mg(NH)(2) has been utilized to investigate its hydriding kinetics at the temperature range 180-220 degrees C. It is found that the hydriding process of Li2Mg(NH)(2) is very sluggish even though it has favorable thermodynamic properties for near the ambient temperature operation. Holding at 200 degrees C for 10h only results in 3.75wt.% H-2 uptake. The detailed kinetic analysis reveals that the hydriding process of Li2Mg(NH)(2) is diffusion-controlled. Thus. this study unambiguously indicates that the future direction to enhance the hydriding kinetics of this promising hydrogen storage material system should be to minimize the diffusion distance and increase the diffusion rate. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1984 / 1991

页数：8

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