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

时间:2021-04-23作者:浏览量:479


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

 

: 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

查看基金资助信息  

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