Effect of Annealing Treatment on the Phase Structure and Electrochemical Properties of La0.63(Pr0.1Nd0.1Y0.6Sm0.1Gd0.1)0.2Mg0.17Ni3.1Co0.3Al0.1 A2B7-type Hydrogen Storage Alloys

doi:10.11896/j.issn.1005-023X.2018.15.005

	Effect of Annealing Treatment on the Phase Structure and Electrochemical Properties of La0.63(Pr0.1Nd0.1Y0.6Sm0.1Gd0.1)0.2Mg0.17Ni3.1Co0.3Al0.1 A2B7-type Hydrogen Storage Alloys
	Deng, Anqiang 1,2; Luo, Yongchun 1,2; Wang, Hao 1; Zhao, Lei 1; Luo, Yuankui 1
刊名	Cailiao Daobao/Materials Review
	2018-08-10
卷号	32 期号:8 页码:2565-2570
关键词	Annealing Charge transfer Corrosion Electric discharges Electrochemical electrodes Electrochemical properties Hydrogen storage Phase structure Structural properties A2B7-type Activation property Annealing treatments Corrosion potentials Effect of annealing Electrochemical charge/discharge High frequency induction High rate dischargeability
ISSN号	1005023X
DOI	10.11896/j.issn.1005-023X.2018.15.005
英文摘要	La0.63(Pr0.1Nd0.1Y0.6Sm0.1Gd0.1)0.2Mg0.17Ni3.1Co0.3Al0.1 hydrogen storage alloys were prepared by high frequency induction melting, and the as-cast alloy was annealed at 900 for 24 h. A structural analysis of the alloys showed that the as-cast alloy was composed of CaCu5-type, Ce5Co19-type and Ce2Ni7-type phases, while the annealed alloy was a single phase Ce2Ni7-type structure. Both the as-cast and annealed alloy electrodes had good activation properties. Discharge curve platform became flatter and wider after annealing treatment. The corrosion potential of the two alloy electrode was basically the same, but the as-cast alloy electrode bear higher corrosion current. The cycle stability of the annealed alloy electrode (S100=83.5%) was obviously better than that of the as-cast alloy electrode (S100=69%). In 100 electrochemical charge/discharge cycles, when the charge capacity was low, the capacity of the alloy electrodes did not degraded. 90% Cmax was the charging capacity critical point of alloy electrode capacity attenuation. The kinetic properties of both the as-cast and annealed alloy electrodes were almost the same. High rate dischargeability characteristics of as-cast alloy electrode was controlled by the hydrogen diffusion rate in alloy bulk, while the annealed alloy electrode was controlled by the charge transfer on alloys surface. © 2018, Materials Review Magazine. All right reserved.
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114194]
专题	材料科学与工程学院
作者单位	1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Deng, Anqiang,Luo, Yongchun,Wang, Hao,et al. Effect of Annealing Treatment on the Phase Structure and Electrochemical Properties of La0.63(Pr0.1Nd0.1Y0.6Sm0.1Gd0.1)0.2Mg0.17Ni3.1Co0.3Al0.1 A2B7-type Hydrogen Storage Alloys[J]. Cailiao Daobao/Materials Review,2018,32(8):2565-2570.
APA	Deng, Anqiang,Luo, Yongchun,Wang, Hao,Zhao, Lei,&Luo, Yuankui.(2018).Effect of Annealing Treatment on the Phase Structure and Electrochemical Properties of La0.63(Pr0.1Nd0.1Y0.6Sm0.1Gd0.1)0.2Mg0.17Ni3.1Co0.3Al0.1 A2B7-type Hydrogen Storage Alloys.Cailiao Daobao/Materials Review,32(8),2565-2570.
MLA	Deng, Anqiang,et al."Effect of Annealing Treatment on the Phase Structure and Electrochemical Properties of La0.63(Pr0.1Nd0.1Y0.6Sm0.1Gd0.1)0.2Mg0.17Ni3.1Co0.3Al0.1 A2B7-type Hydrogen Storage Alloys".Cailiao Daobao/Materials Review 32.8(2018):2565-2570.