Influence of over-stoichiometry on hydrogen storage and electrochemical properties of Sm-doped low-Co AB(5)-type alloys as negative electrode materials in nickel-metal hydride batteries
作者:Chen, M (Chen, Min)[ 1 ] ; Tan, C (Tan, Cheng)[ 1 ] ; Jiang, WB (Jiang, Wenbin)[ 1 ] ; Huang, JL (Huang, Jianling)[ 1 ] ; Min, D (Min, De)[ 2 ] ; Liao, CH (Liao, Canhui)[ 2 ] ; Wang, H (Wang, Hui)[ 1 ] ; Liu, JW (Liu, Jiangwen)[ 1 ] ; Ouyang, LZ (Ouyang, Liuzhang)[ 1 ] ; Zhu, M (Zhu, Min)[ 1 ]
JOURNAL OF ALLOYS AND COMPOUNDS
卷: 867
文献号: 159111
DOI: 10.1016/j.jallcom.2021.159111
出版年: JUN 25 2021
文献类型:Article
摘要
The La0.582Ce0.191Zr0.025Sm0.202(Ni0.849Co0.032Mn0.05Al0.069)(5+x) (x = 0.00, 0.10, 0.20, 0.35 or 0.47) hydrogen storage alloys are firstly synthesized to explore the influence of over-stoichiometry on crystal structure and electrochemical performance for nickel-metal hydride (Ni-MH) battery anodes. These alloys possess major CaCu5-type AB(5) and minor BiF3-type Ni2MnAl phases. The decreasing of cell volume and charge acceptance ability of the alloy electrodes reduces capacity and peak power density. Meanwhile, the decreasing of MH stability results in the poorer charge retention rate. The enhanced anti-pulverization property of larger anisotropic factor (c/a) and the weakened electrode polarization promote the cycle stability. Moreover, the higher discharge plateau potential is beneficial to the discharge capacity at - 20 and - 40 degrees C. The high rate discharge ability (HRD) and initial voltage drop decrease at first and then increase because of the changing rate-determining factor of HRD with the shifted x. (C) 2021 Elsevier B.V. All rights reserved.
关键词
作者关键词:Ni-MH battery; Hydrogen storage alloy; Over-stoichiometry; Samarium doping
作者信息
通讯作者地址:
South China University of Technology South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.
通讯作者地址: Ouyang, LZ (通讯作者)
显示更多 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.
地址:
显示更多 [ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China
[ 2 ] Sihui City Double Win Ind CO LTD, Sihui, Peoples R China
电子邮件地址:meouyang@scut.edu.cn
基金资助致谢
基金资助机构显示详情 授权号
National Key R&D Program of China
2019YFB1505101
National Natural Science Foundation of China (NSFC)
NSFC51621001
National Natural Science Foundation of China (NSFC)
51771075
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出版商
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
Web of Science 类别:Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering