A study on structure and electrochemical properties of (La, Ce, Pr, Nd)(2)MgNi9 hydrogen storage electrode alloys

doi:10.1016/j.electacta.2006.03.083

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	A study on structure and electrochemical properties of (La, Ce, Pr, Nd)(2)MgNi9 hydrogen storage electrode alloys
	Zhang, Faliang; Luo, Yongchun; Deng, Anqiang; Tang, Zhaohui; Kang, Long; Chen, Jianhong
刊名	ELECTROCHIMICA ACTA
	2006-10-05
卷号	52 期号:1 页码:24-32
关键词	hydrogen storage alloy PuNi3-type P-C isotherms electrochemical properties kinetic characteristics
ISSN号	0013-4686
DOI	10.1016/j.electacta.2006.03.083
英文摘要	(La, Ce, Pr, Nd)(2)MgNi9 hydrogen storage alloys were prepared through induction melting followed by a long annealing treatment. The structure and electrochemical properties of annealed alloys have been investigated by orthogonal design experiments. Both the individual effects of each substituting element and their interaction in alloys were studied systemically. It has been shown that the structure of main phase in alloys belongs to PuNi3-type with a space group R-3m. Substituting rare-earth elements have a significant effect on both the phase structure of alloys and microstructure. The anisotropic change in the crystal structure of alloys can cause the acceleration of pulverization of alloy particles and result in the deterioration of the cyclic stability of alloy electrodes. Misch metals can raise the plateau pressure of hydrogen absorption/desorption. The discharge capacity of alloy ranges from 342.97 to 380.68 mAh g(-1) depending on the sort and content of substituting elements. Both cerium and neodymium can obviously reduce the discharge capacity of alloy electrodes. When compared to the La2MgNi9 alloy electrode, mish metals can significantly improve the high rate dischargeability of alloy electrodes. The improvement of the kinetic characteristic of alloy electrodes mainly results from the increase of the hydrogen diffusion rate in alloy bulk. (c) 2006 Elsevier Ltd. All rights reserved.
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000241253100004
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35664]
专题	兰州理工大学材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Zhang, Faliang
作者单位	Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Faliang,Luo, Yongchun,Deng, Anqiang,et al. A study on structure and electrochemical properties of (La, Ce, Pr, Nd)(2)MgNi9 hydrogen storage electrode alloys[J]. ELECTROCHIMICA ACTA,2006,52(1):24-32.
APA	Zhang, Faliang,Luo, Yongchun,Deng, Anqiang,Tang, Zhaohui,Kang, Long,&Chen, Jianhong.(2006).A study on structure and electrochemical properties of (La, Ce, Pr, Nd)(2)MgNi9 hydrogen storage electrode alloys.ELECTROCHIMICA ACTA,52(1),24-32.
MLA	Zhang, Faliang,et al."A study on structure and electrochemical properties of (La, Ce, Pr, Nd)(2)MgNi9 hydrogen storage electrode alloys".ELECTROCHIMICA ACTA 52.1(2006):24-32.