The effect of Mg on the microstructure and electrochemical properties of La0.8-xGd0.2Mgx Ni3.3Co0.3Al0.1(x=0-0.4) hydrogen storage alloys

	The effect of Mg on the microstructure and electrochemical properties of La0.8-xGd0.2Mgx Ni3.3Co0.3Al0.1(x=0-0.4) hydrogen storage alloys
	Guo, Xing-Bo 1; Luo, Yong-Chun 1,2; Gao, Zhi-Jie 1; Zhang, Guo-Qing 1; Kang, Long 1
刊名	Gongneng Cailiao/Journal of Functional Materials
	2012-09-30
卷号	43 期号:18 页码:2450-2455
关键词	Aluminum Argon Cerium Electrochemical properties Gadolinium Hydrogen Hydrogen storage Hydrogen storage alloys Lithium compounds Microstructure X ray diffraction Activation capability Annealed alloys Annealing treatments Argon atmospheres Charge-discharge cycle Discharge capacities Electrochemical measurements Equilibrium pressure High purity Hydrogen absorption Hydrogen absorption properties Hydrogen storage capacities Induction melting Mg content Plateau pressures
ISSN号	10019731
英文摘要	La0.8-x Gd0.2MgxNi3.3 Co0.3Al0.1 (x = 0-0.4) hydrogen storage alloys were prepared by induction melting followed by annealing treatment for 16 hours at 1273K under high purity argon atmosphere. The effect of Mg on the microstructure and electrochemical properties of La0.8-xGd0.2Mgx Ni3.3Co0.3Al0.1 (x = 0-0.4) were investigated systematically by means of X-ray diffraction (XRD), electron probe micro-analysis (EPMA) and electrochemical measurements. The results showed that all the annealed alloys mainly consisted of Pr5Co19-type, PuNi3-type, Ce2Ni7-type and CaCu5-type phase. The main phase of Pr5Co19-type abundance first increased and then decreased with increasing Mg contents, and the maximum main phase abundance reached 88.23wt% when x was 0.15. The equilibrium pressures of hydrogen absorption rose gradually and became flatter when x increased. The lowest plateau pressure of the alloys was about 0.02MPa and the hydrogen storage capacity was 1.334wt% when x was 0.15. The electrochemical measurements showed that all the alloys had a superior activation capability and the discharge capacity of the alloys first increased and then decreased with the increase of Mg contents. Among the alloys study, the La0.65Gd0.2 Mg0.15Ni3.3 Co0.3Al0.1 alloy(x=0.15)possessed the best electrochemical properties, the maximum discharge capacity of the alloy reached 377.9 mAh/g and the discharge capacity retention rate S100 reached 90.2% after 100 charge-discharge cycles.
语种	中文
出版者	Journal of Functional Materials, P.O. Box 1512, Chongqing, 630700, China
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/111097]
专题	材料科学与工程学院
作者单位	1.College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2.State Key Laboratory of Gansu Advanced Non-Ferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Guo, Xing-Bo,Luo, Yong-Chun,Gao, Zhi-Jie,et al. The effect of Mg on the microstructure and electrochemical properties of La0.8-xGd0.2Mgx Ni3.3Co0.3Al0.1(x=0-0.4) hydrogen storage alloys[J]. Gongneng Cailiao/Journal of Functional Materials,2012,43(18):2450-2455.
APA	Guo, Xing-Bo,Luo, Yong-Chun,Gao, Zhi-Jie,Zhang, Guo-Qing,&Kang, Long.(2012).The effect of Mg on the microstructure and electrochemical properties of La0.8-xGd0.2Mgx Ni3.3Co0.3Al0.1(x=0-0.4) hydrogen storage alloys.Gongneng Cailiao/Journal of Functional Materials,43(18),2450-2455.
MLA	Guo, Xing-Bo,et al."The effect of Mg on the microstructure and electrochemical properties of La0.8-xGd0.2Mgx Ni3.3Co0.3Al0.1(x=0-0.4) hydrogen storage alloys".Gongneng Cailiao/Journal of Functional Materials 43.18(2012):2450-2455.