Phase Structure, Hydrogen Storage and Electrochemical Performance of La-Nd-Y-Ni Based A5B19 Type Hydrogen Storage Alloys

doi:10.11785/S1000-4343.20220208

	Phase Structure, Hydrogen Storage and Electrochemical Performance of La-Nd-Y-Ni Based A5B19 Type Hydrogen Storage Alloys
	Zhao, Liuqiang 1; Deng, Anqiang 1; Yang, Yang 1; Kang, Xiaoyan 1; Luo, Yongchun 1,2
刊名	Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society
	2022-04-01
卷号	40 期号:2 页码:250-260
关键词	Aluminum alloys Aluminum coatings Aluminum corrosion Electric discharges Electrochemical electrodes Hydrogen storage Hydrogen storage alloys Lanthanum alloys Morphology Neodymium alloys Nickel alloys Phase structure Rare earths Ternary alloys Alloy electrodes Cycling stability Electrochemical analysis Electrochemical performance High rate discharge ability Hydrogen storage behaviors La-Y-ni based hydrogen storage alloy Microstructure and phase structure Storage performance Superlattice structures
ISSN号	1000-4343
DOI	10.11785/S1000-4343.20220208
英文摘要	Rare earth elements have an important influence on the electrochemical performance of RE-Mg(Y)-Ni system AB3.0-4.0 hydrogen storage alloy with superlattice structure. In this work, a new type of La-Y-Ni-based A5B19-type annealed alloys La0.4-xNdxY0.6Ni3.52Mn0.18Al0.1 (x=0~0.4) were prepared, the influence of rare earth Nd on the phases structure, hydrogen storage and electrochemical properties of the alloy was studied by XRD, SEM, XPS, gas-solid reaction and electrochemical analysis. The corrosion morphology and product composition of the electrode surface were observed and analyzed. The results show that with the increase of the Nd element, the phase abundance of A5B19-type increases gradually, and the phase abundance of 3R-Ce5Co19 type phase reaches 70%. The alloy has excellent gas hydrogen absorption kinetics and hydrogen storage PCT curve platform characteristics. With the increase of Nd element, the maximum hydrogen storage capacity of the alloy reaches 1.38%~1.46%, and the hydrogen absorption plateau pressure of the alloy increases from 0.02 MPa to 0.064 MPa. Electrochemical analyses shows that the alloy electrodes with Nd have superior cycling stability and high-rate discharge-ability (HRD). The maximum discharge capacity of alloy electrodes was 342.5~382.8 mAhg-1, and the capacity retention of alloy electrodes after 100 cycles (S100) increases from 82.9% (x=0) to 93.7% (x=0.4), and the HRD at discharge current density of 900 mAhg-1 increases from 48.7% (x=0) to 87.8% (x=0.4). After adding Nd element, the surface of the alloy electrode forms a fine and compact coating of rare earth oxide, which inhibits the oxidation and dissolution of Y, Mn and Al to a certain extent, thus improves the cycling stability of alloy electrodes. © 2022, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.
语种	中文
出版者	Editorial Office of Chinese Rare Earths
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158459]
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.The State Key Laboratory of Advanced Processing and Reuse of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhao, Liuqiang,Deng, Anqiang,Yang, Yang,et al. Phase Structure, Hydrogen Storage and Electrochemical Performance of La-Nd-Y-Ni Based A5B19 Type Hydrogen Storage Alloys[J]. Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society,2022,40(2):250-260.
APA	Zhao, Liuqiang,Deng, Anqiang,Yang, Yang,Kang, Xiaoyan,&Luo, Yongchun.(2022).Phase Structure, Hydrogen Storage and Electrochemical Performance of La-Nd-Y-Ni Based A5B19 Type Hydrogen Storage Alloys.Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society,40(2),250-260.
MLA	Zhao, Liuqiang,et al."Phase Structure, Hydrogen Storage and Electrochemical Performance of La-Nd-Y-Ni Based A5B19 Type Hydrogen Storage Alloys".Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society 40.2(2022):250-260.