Effect of substituting Al for Co on the hydrogen-storage performance of La(0.7)Mg(0.3)Ni(2.6)Al(x)Co(0.5-x) (x=0.0-0.3) alloys

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	Effect of substituting Al for Co on the hydrogen-storage performance of La(0.7)Mg(0.3)Ni(2.6)Al(x)Co(0.5-x) (x=0.0-0.3) alloys
	Y. X. Liu; L. Q. Xu; W. Q. Jiang; G. X. Li; W. L. Wei; J. Guo
	2009
发表期刊	International Journal of Hydrogen Energy
ISSN	0360-3199
卷号	34 期号:7 页码:2986-2991
摘要	La(0.7)Mg(0.3)Ni(2.6)Al(x)Co(0.5-x) (x = 0.0-0.3) alloys were prepared by induction melting, and the effects of partially substituting Al for Co on the structure and hydrogen-storage properties of the alloys were investigated systematically. It is found that La(Ni, Co, Al)(5) phase with hexagonal CaCu(5)-type structure, LaNi(3) phase with PuNi(3) Structure and MgNi(2) phase exist as the main phases in La(0.7)Mg(0.3)Ni(2.6)Al(x)Co(0.5-x) (x = 0.0-0.3) alloys, and the cell volume of the La(Ni, Co, AI)5 phase increases with the amount of Al added. The results show that the substitution of Al for Co can reduce the plateau pressure and the hysteresis between hydrogen absorption and desorption, and improve the hydrogen-absorption capacity and thermal stability of the hydride. Moreover, the addition of Al can delay the oxidation of the surface layer of the alloy electrodes in electrolyte, slow down the capacity degradation and prolong the cycling lifetime, and enhance the electrocatalytic activity of the hydrogen-storage electrodes for hydrogen oxidation. (C) 2009 Published by Elsevier Ltd on behalf of international Association for Hydrogen Energy.
部门归属	[liu, yixin; xu, liqin; jiang, weiqing; li, guangxu; wei, wenlou; guo, jin] guangxi univ, coll phys sci & technol, minist nonferrous met & mat proc technol, key lab natl educ, nanning 530004, peoples r china. [guo, jin] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;guo, j (reprint author), guangxi univ, coll phys sci & technol, minist nonferrous met & mat proc technol, key lab natl educ, 100 daxuelu, nanning 530004, peoples r china;guojin@gxu.edu.cn
关键词	Hydrogen-storage Alloy Hydrogen-storage Performance Thermal Stability Electrode Materials Lani3.55mn0.4al0.3co0.75
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32139
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. X. Liu,L. Q. Xu,W. Q. Jiang,et al. Effect of substituting Al for Co on the hydrogen-storage performance of La(0.7)Mg(0.3)Ni(2.6)Al(x)Co(0.5-x) (x=0.0-0.3) alloys[J]. International Journal of Hydrogen Energy,2009,34(7):2986-2991.
APA	Y. X. Liu,L. Q. Xu,W. Q. Jiang,G. X. Li,W. L. Wei,&J. Guo.(2009).Effect of substituting Al for Co on the hydrogen-storage performance of La(0.7)Mg(0.3)Ni(2.6)Al(x)Co(0.5-x) (x=0.0-0.3) alloys.International Journal of Hydrogen Energy,34(7),2986-2991.
MLA	Y. X. Liu,et al."Effect of substituting Al for Co on the hydrogen-storage performance of La(0.7)Mg(0.3)Ni(2.6)Al(x)Co(0.5-x) (x=0.0-0.3) alloys".International Journal of Hydrogen Energy 34.7(2009):2986-2991.