Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys

doi:10.1016/j.ijhydene.2009.10.041

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys
	Jiang, Long 1,2; Li, Guangxu 2; Xu, Liqin 2; Jiang, Weiqing 2; Lan, Zhiqiang 2; Guo, Jin 2,3
刊名	INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
	2010
卷号	35 期号:1 页码:204-209
关键词	Hydrogen storage alloy Hydrogen storage property Electrochemical characteristic
ISSN号	0360-3199
DOI	10.1016/j.ijhydene.2009.10.041
通讯作者	Guo, Jin(guojin@gxu.edu.cn)
英文摘要	ReNi2.6-xMnxCo0.9 (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 Ce2Ni7-type structure, (Pr, Ce)Co-3 phase with a PuNi3-type structure, and (La, Pr)Ni-5 phase with a CaCu5-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 ReNi2.6-xMnxCo0.9 (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 ReNi2.6-xMnxCo0.9 (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 ReNi2.15Mn0.45Co0.9 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.
资助项目	National Natural Science Foundation of China[50561002] ; National Natural Science Foundation of China[50861003] ; Natural Science Foundation of Guangxi[0728028] ; Guangxi University Key Program for Science and Technology Research[2004ZD04]
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000274079200024
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Guangxi ; Guangxi University Key Program for Science and Technology Research
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/101933]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guo, Jin
作者单位	1.Yangtze Univ, Sch Phys Sci & Technol, Jinzhou 434023, Peoples R China 2.Guangxi Univ, Coll Phys Sci & Technol, Nanning 530004, Peoples R China 3.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Long,Li, Guangxu,Xu, Liqin,et al. Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(1):204-209.
APA	Jiang, Long,Li, Guangxu,Xu, Liqin,Jiang, Weiqing,Lan, Zhiqiang,&Guo, Jin.(2010).Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,35(1),204-209.
MLA	Jiang, Long,et al."Effect of substituting Mn for Ni on the hydrogen storage and electrochemical properties of ReNi2.6-xMnxCo0.9 alloys".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35.1(2010):204-209.