Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi(2.6-x)Mn(x)Co(0.9) alloys

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	Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi(2.6-x)Mn(x)Co(0.9) alloys
	L. Jiang; G. X. Li; L. Q. Xu; W. Q. Jiang; Z. Q. Lan; J. Guo
	2010
发表期刊	International Journal of Hydrogen Energy
ISSN	0360-3199
卷号	35 期号:1 页码:204-209
摘要	ReNi(2.6-x)Mn(x)Co(0.9) (x = 0.0, 0.225, 0.45, 0.675, 0.90) alloys were prepared by induction melting. The effects of partially substituting Mn for Ni on the phase structure and electrochemical properties of the alloys were investigated systematically. In the alloys, (La, Ce)(2)Ni(7) phase with a Ce(2)Ni(7)-type structure, (Pr, Ce)Co(3) phase with a PuNi(3)-type structure, and (La, Pr)Ni(5) phase with a CaCu(5)-type structure were the main phases. The (La,Pr)Ni phase appeared when x increased to 0.45, and the (La, Pr)Ni(5) phase disappeared with further increasing x (x > 0.45). The hydrogen-storage capacity of the ReNi(2.6-x)Mn(x)Co(0.9) (x = 0.0, 0.225, 0.45, 0.675, 0.90) alloys initially increased and reached a maximum when Mn content was x = OAS, and then decreased with further increasing Mn content. The ReNi(2.6-x)Mn(x)Co(0.9) (x = 0.0, 0.225, 0.45, 0.675, 0.90) alloy exhibited a hydrogen- storage capacity of 0.81, 0.98, 1.04, 0.83 and 0.53 wt.%, respectively. Electrochemical studies showed that the maximum discharge capacity of the alloy electrodes initially increased from 205 mAh/g (x 0.0) to 352 mAh/g (x = 0.45) and then decreased to 307 mAh/g (x = 90). The hydrogen absorption rate first increased and then decreased with addition of Mn element. The ReNi(2.15)Mn(0.45)Co(0.9) alloy showed faster hydrogen absorption kinetics than that of the other alloys. The presence of Mn element slowed hydrogen desorption kinetics. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
部门归属	[jiang, long; li, guangxu; xu, liqin; jiang, weiqing; lan, zhiqiang; guo, jin] guangxi univ, coll phys sci & technol, nanning 530004, peoples r china. [jiang, long] yangtze univ, sch phys sci & technol, jinzhou 434023, 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, 100 daxuelu, nanning 530004, peoples r china;guojin@gxu.edu.cn
关键词	Hydrogen Storage Alloy Hydrogen Storage Property Electrochemical Characteristic Electrode Alloys Absorbing Alloys Metal-hydrides Batteries Behavior Pr La
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31177
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Jiang,G. X. Li,L. Q. Xu,et al. Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi(2.6-x)Mn(x)Co(0.9) alloys[J]. International Journal of Hydrogen Energy,2010,35(1):204-209.
APA	L. Jiang,G. X. Li,L. Q. Xu,W. Q. Jiang,Z. Q. Lan,&J. Guo.(2010).Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi(2.6-x)Mn(x)Co(0.9) alloys.International Journal of Hydrogen Energy,35(1),204-209.
MLA	L. Jiang,et al."Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi(2.6-x)Mn(x)Co(0.9) alloys".International Journal of Hydrogen Energy 35.1(2010):204-209.