Study on structure and electrochemical properties of the (LaGdMg)Ni3.35-xCoxAl0.15 (x=0-2.0) hydrogen storage alloys

doi:10.1016/S1002-0721(10)60280-3

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Study on structure and electrochemical properties of the (LaGdMg)Ni3.35-xCoxAl0.15 (x=0-2.0) hydrogen storage alloys
	Gao Zhijie 2; Luo Yongchun 1,2; Lin Zhen ; Li Rongfeng ; Wang Jianyi ; Kang Long 2
刊名	JOURNAL OF RARE EARTHS
	2010-12
卷号	28 页码:425-430
关键词	hydrogen storage alloy element substitution Ce2Ni7-type phase structure electrochemical properties rare earths
ISSN号	1002-0721
DOI	10.1016/S1002-0721(10)60280-3
英文摘要	Hydrogen storage alloys (LaGdMg)Ni3.35-xCoxAl0.15 (x=0, 0.1, 0.3, 0.5, 1.0, 1.5, 2.0) were prepared by induction melting followed by annealing treatment in argon atmosphere. The effects of partly replacing Ni by Co element in (LaGdMg)Ni3.35Al0.15 on the phase structure and electrochemical properties of (LaGdMg) Ni3.35-xCoxAl0.15 alloys were investigated. Structure analysis showed that the alloys consisted of Ce2Ni7-type (Gd2Co7-type), CaCu5-type, Pr5Co19-type, PuNi3-type phase structure. The addition of Co element obviously reduced the contents of CaCu5-type phase and increased the contents of Ce2Ni7-type phase. However, Pr5Co19-type and CaCu5-type phase obviously increased with the high content of Co. Rietveld analysis showed that the c-axis lattice parameters and cell volumes of the component phases increased with increasing Co content. The electrochemical measurements showed that as the Co content increased, the maximum discharge capacity and the cyclic stability of the annealed alloys both first increased then decreased. The (LaGdMg)Ni3.05Co0.3Al0.15 alloy electrode exhibited the maximum discharge capacity (392.92 mAh/g), and the (LaGdMg)Ni1.85Co1.0Al0.15 alloy electrode showed the best cyclic stability (S-100=96.1%).
资助项目	National Natural Science Foundation of China[50941019]
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000287023600097
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35171]
专题	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
通讯作者	Luo Yongchun
作者单位	1.Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Coll Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Gao Zhijie,Luo Yongchun,Lin Zhen,et al. Study on structure and electrochemical properties of the (LaGdMg)Ni3.35-xCoxAl0.15 (x=0-2.0) hydrogen storage alloys[J]. JOURNAL OF RARE EARTHS,2010,28:425-430.
APA	Gao Zhijie,Luo Yongchun,Lin Zhen,Li Rongfeng,Wang Jianyi,&Kang Long.(2010).Study on structure and electrochemical properties of the (LaGdMg)Ni3.35-xCoxAl0.15 (x=0-2.0) hydrogen storage alloys.JOURNAL OF RARE EARTHS,28,425-430.
MLA	Gao Zhijie,et al."Study on structure and electrochemical properties of the (LaGdMg)Ni3.35-xCoxAl0.15 (x=0-2.0) hydrogen storage alloys".JOURNAL OF RARE EARTHS 28(2010):425-430.