La-Mg-Ni ternary hydrogen storage alloys with Ce2Ni7-type and Gd2Co7-type structure as negative electrodes for Ni/Mh batteries

doi:10.1016/j.jallcom.2006.05.010

	La-Mg-Ni ternary hydrogen storage alloys with Ce2Ni7-type and Gd2Co7-type structure as negative electrodes for Ni/Mh batteries
	Zhang, Fa-Liang; Luo, Yong-Chun; Chen, Jiang-Ping; Yan, Ru-Xu; Chen, Jian-Hong
	2007-03-14
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	430 期号:1-2 页码:302-307
摘要	Hydrogen strorage alloys with formula La1.5Mg0.5Ni7 were prepared by induction melting followed by different annealing treatments (1073, 1123 and 1173 K) for 24 h. The alloy composition, alloy microstructure and electrochemical properties were investigated, respectively. The results showed that the multi-phase structure of as-cast alloy was converted into a double-phase structure (Gd2Co7-type phase and Ce2Ni7-type phase) through annealing treatments. Mg atoms were mainly located in Laves unit of Gd2Co7-type unit cell and Ce2Ni7-type unit cell. The electrochemical capacity of alloy electrodes after annealing treatment could be up to 390 m-Ah/g. The cyclic stability of alloy electrodes was significantly improved by annealing treatments; After 150 charge/discharge cycles, the capacity retention ratio of alloy annealed at 1173 K was the highest (81.9%). The high rate dischargeability of alloy electrodes was also improved due to annealing treatment. (c) 2006 Elsevier B.V. All rights reserved.
关键词	hydrogen storage materials crystal structure and symmetry electrochemical reactions X-ray diffraction
DOI	10.1016/j.jallcom.2006.05.010
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000244826200053
出版者	ELSEVIER SCIENCE SA
EI入藏号	20070610418146
EI主题词	Ternary systems
EI分类号	933.1.1 Crystal Lattice - 804 Chemical Products Generally - 801.4.1 Electrochemistry - 801 Chemistry - 704.1 Electric Components - 702.1.2 Secondary Batteries - 547.2 Rare Earth Metals - 537.1 Heat Treatment Processes - 531.1 Metallurgy
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/35615
专题	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材料科学与工程学院_特聘教授组
通讯作者	Zhang, Fa-Liang
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, Fa-Liang,Luo, Yong-Chun,Chen, Jiang-Ping,et al. La-Mg-Ni ternary hydrogen storage alloys with Ce2Ni7-type and Gd2Co7-type structure as negative electrodes for Ni/Mh batteries[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2007,430(1-2):302-307.
APA	Zhang, Fa-Liang,Luo, Yong-Chun,Chen, Jiang-Ping,Yan, Ru-Xu,&Chen, Jian-Hong.(2007).La-Mg-Ni ternary hydrogen storage alloys with Ce2Ni7-type and Gd2Co7-type structure as negative electrodes for Ni/Mh batteries.JOURNAL OF ALLOYS AND COMPOUNDS,430(1-2),302-307.
MLA	Zhang, Fa-Liang,et al."La-Mg-Ni ternary hydrogen storage alloys with Ce2Ni7-type and Gd2Co7-type structure as negative electrodes for Ni/Mh batteries".JOURNAL OF ALLOYS AND COMPOUNDS 430.1-2(2007):302-307.