Effects of annealing treatment on microstructure and electrochemical properties of La0.68Gd0.2Mg0.12 Ni3.3Co0.3Al0.1 hydrogen storage alloys

	Effects of annealing treatment on microstructure and electrochemical properties of La0.68Gd0.2Mg0.12 Ni3.3Co0.3Al0.1 hydrogen storage alloys
	Fang, Xiao-Fei 1; Luo, Yong-Chun 1,2; Gao, Zhi-Jie 1; Zhang, Guo-Qing 1; Kang, Long 1,2
刊名	Gongneng Cailiao/Journal of Functional Materials
	2012-10-30
卷号	43 期号:20 页码:2751-2756
关键词	Aluminum Cerium Cerium alloys Electrochemical properties Gadolinium Hydrogen storage alloys Inductively coupled plasma Lanthanum Lithium compounds Microstructure X ray diffraction A5B19-type phase Alloy electrodes Annealed alloys Annealing temperatures Annealing treatments Charge-discharge cycle Cycle stability Discharge capacities Electrochemical measurements Electrode capacity Induction melting
ISSN号	10019731
英文摘要	La0.68Gd0.2Mg0.12 Ni3.3Co0.3Al0.1 hydrogen storage alloys were prepared by induction melting and then annealed at different temperature(1173-1273K) in the closed container for 16h. The effect of annealing temperature on the microstructure and electrochemical properties of La0.68Gd0.2Mg0.12 Ni3.3Co0.3Al0.1 were investigated by means of inductively coupled plasma(ICP), X-ray diffraction (XRD), electron probe micro-analysis (EPMA) and electrochemical measurements. The results showed that the A5B19 alloys mainly consisted of Ce5Co19-type (Pr5Co19-type), PuNi3-type and CaCu5-type phase. Meanwhile, with increasing annealing temperature, Pr5Co19-type phase abundance in annealed alloys increased, and Ce5Co19-type phase abundance decreased. The Pr5Co19-type phase abundance was 87.75wt%, and Ce5Co19-type phase abundance was only 0.78wt% when annealing temperature was 1273K. The electrochemical measurements showed that these alloys had little effects on activation performance under different annealing temperature, but it was great impact on electrode capacity and cycle stability. The discharge capacity of the alloys reached 373.01mAh/g when annealing temperature was 1273K. After 100 charge-discharge cycles, the discharge capacity retention rate(S100) of the alloy electrode(T=1273K) reached 90.2%.
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/110989]
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	Fang, Xiao-Fei,Luo, Yong-Chun,Gao, Zhi-Jie,et al. Effects of annealing treatment on microstructure and electrochemical properties of La0.68Gd0.2Mg0.12 Ni3.3Co0.3Al0.1 hydrogen storage alloys[J]. Gongneng Cailiao/Journal of Functional Materials,2012,43(20):2751-2756.
APA	Fang, Xiao-Fei,Luo, Yong-Chun,Gao, Zhi-Jie,Zhang, Guo-Qing,&Kang, Long.(2012).Effects of annealing treatment on microstructure and electrochemical properties of La0.68Gd0.2Mg0.12 Ni3.3Co0.3Al0.1 hydrogen storage alloys.Gongneng Cailiao/Journal of Functional Materials,43(20),2751-2756.
MLA	Fang, Xiao-Fei,et al."Effects of annealing treatment on microstructure and electrochemical properties of La0.68Gd0.2Mg0.12 Ni3.3Co0.3Al0.1 hydrogen storage alloys".Gongneng Cailiao/Journal of Functional Materials 43.20(2012):2751-2756.