Influence of annealing treatment on the hydrogen storage properties of La(2-x)Ti(x)MgNi(9) (x=0.2, 0.3) alloys

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	Influence of annealing treatment on the hydrogen storage properties of La(2-x)Ti(x)MgNi(9) (x=0.2, 0.3) alloys
	W. Q. Jiang; Z. Q. Lan; W. L. Wei; Y. X. Liu; J. Guo
	2010
发表期刊	International Journal of Hydrogen Energy
ISSN	0360-3199
卷号	35 期号:20 页码:11016-11024
摘要	La(2-x)Ti(x)MgNi(9) (x = 0.2, 0.3) alloys have been prepared by magnetic levitation melting under an Argon atmosphere, and the as-cast alloys were annealed at 800 degrees C, 900 degrees C for 10 h under vacuum. The effects of annealing on the hydrogen storage properties of the alloys were investigated systematically by XRD, PCT and electrochemical measurements. For the La(2-x)Ti(x)MgNi(9) (x = 0.2, 0.3) alloys, LaNi(5), LaMg(2)Ni(9) and LaNi(3) are the main phases and a Ti(2)Ni phase appears at 900 degrees C. The effective hydrogen storage capacity increases from 1.10, 1.10 wt.% (as-cast) to 1.22, 1.16 wt.% (annealed 800 degrees C) and 1.31, 1.27 wt.% (annealed 900 degrees C), respectively. The annealing not only improves the hydrogen absorption/desorption kinetics but also increases the maximum discharge capacity and enhances the cycling stability. The La(1.8)Ti(0.2)MgNi(9) alloy annealed at 900 degrees C exhibits good electrochemical properties, and the discharge capacities decrease from 366.1 mA h/g to 219.6 mA h/g after 177 charge-discharge cycles. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
部门归属	[jiang, weiqing; lan, zhiqiang; wei wenlou; liu yixin; guo, jin] guangxi univ, coll phys sci & technol, key lab, natl educ minist nonferrous met & mat proc techno, 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, key lab, natl educ minist nonferrous met & mat proc techno, nanning 530004, peoples r china;guojin@gxu.edu.cn
关键词	Hydrogen Storage Alloy Annealing Hydrogen Storage Property Electrochemical Properties Electrode Alloys Absorption System
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31182
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Q. Jiang,Z. Q. Lan,W. L. Wei,et al. Influence of annealing treatment on the hydrogen storage properties of La(2-x)Ti(x)MgNi(9) (x=0.2, 0.3) alloys[J]. International Journal of Hydrogen Energy,2010,35(20):11016-11024.
APA	W. Q. Jiang,Z. Q. Lan,W. L. Wei,Y. X. Liu,&J. Guo.(2010).Influence of annealing treatment on the hydrogen storage properties of La(2-x)Ti(x)MgNi(9) (x=0.2, 0.3) alloys.International Journal of Hydrogen Energy,35(20),11016-11024.
MLA	W. Q. Jiang,et al."Influence of annealing treatment on the hydrogen storage properties of La(2-x)Ti(x)MgNi(9) (x=0.2, 0.3) alloys".International Journal of Hydrogen Energy 35.20(2010):11016-11024.