Improved hydrogen storage of LiBH4 catalyzed magnesium

被引：57

作者：

Mao, J. F.

Wu, Z.

Chen, T. J.

Weng, B. C.

Xu, N. X.

Huang, T. S.

Guo, Z. P. ^{[1
]}

Liu, H. K.

Grant, D. M.

Walker, G. S.

Yu, X. B.

机构：

[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Energy Sci & Technol Lab, Shanghai 200050, Peoples R China

[2] Univ Wollongong, Inst Superconduct & Elect Mat, Wollongong, NSW 2522, Australia

[3] Univ Nottingham, Sch Mech Mat & Mfg Engn, Nottingham NG7 2RD, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 33期

关键词：

D O I：

10.1021/jp072803f

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 effect of LiBH4 on the hydrogen sorption performance of magnesium was investigated. It was found that the hydrogen storage properties of LiBH4/Mg mixtures exhibit a dramatic improvement as compared to plain magnesium powder. For example, at 250 degrees C, a LiBH4/Mg (mass ratio 1:4) composite can absorb 6.7 wt % hydrogen in 60 min, while only less than 1 wt % hydrogen was absorbed by pure magnesium in the same period under similar conditions. The hydrogen desorption properties of the composite at 350 degrees C were also improved significantly as compared to the plain magnesium powder. Furthermore, highly activated magnesium hydride was synthesized directly by ball milling LiBH4/Mg mixtures under high hydrogen pressure. The synthesized magnesium hydride exhibits superior kinetics, absorbing 5.78 wt % hydrogen at the relatively low temperature of 200 degrees C within 100 min.

引用

页码：12495 / 12498

页数：4

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