Reaction Mechanism and Hydrogen Storage Properties of LiAlH4 and LiNH2

被引：0
|
作者：
Ren Xiao [1 ]
Wang Xin-Hua [1 ]
Li Shou-Quan [1 ]
Ge Hong-Wei [1 ]
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
来源：
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2011年 / 32卷 / 06期
关键词：
Hydrogen storage material; Hydrogen storage property; Complex hydride; Chemical hydride; Metal-nitrogen-hydride; LI-AL-N; H SYSTEM; NITRIDES;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Mixture of LiAlH4 and LiNH2 with a molar ratio of 1: 2 was ball-milled to form Li-Al-N-H composite. The prepared composite was heated for dehydrogenation, and the fully dehydrogenated sample was re-hydrogenated. The dehydrogenation/re-hydrogenation processes were studied by means of XRD, DSC and FTIR analysis. The experimental results show that the dehydrogenation process of LiAlH4/2LiNH(2) composite was a three-step reaction, and Li3AlN2 was finally formed after releasing 8.65% (mass fraction) hydrogen. Furthermore, the derived LiAlH4 can be re-hydrogenated to LiNH2, AlN and LiH under conditions of 10 MPa H-2 and 400 degrees C, and 5.0% (mass fraction) hydrogen can be reversibly stored by Li3AlN2. The dehydrogenation/re-hydrogenation mechanism of LiAlH4/2LiNH(2) composite was also discussed.
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页码：1330 / 1333
页数：4
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