Effect of Sm on performance of Pr/NW/Mg-free and low-cobalt AB(4.6) alloys in nickel-metal hydride battery electrode
作者:Tan, C (Tan, Cheng)[ 1,2 ] ; Ouyang, LZ (Ouyang, Liuzhang)[ 1,2,4,5 ] ; Chen, M (Chen, Min)[ 1,2 ] ; Jiang, WB (Jiang, WenBin)[ 1,2 ] ; Min, D (Min, De)[ 3 ] ; Liao, CH (Liao, CanHui)[ 3 ] ; Zhu, M (Zhu, Min)[ 1,2 ]
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JOURNAL OF ALLOYS AND COMPOUNDS
卷: 829
文献号: 154530
DOI: 10.1016/j.jallcom.2020.154530
出版年: JUL 15 2020
文献类型:Article
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摘要
In this study, Sm-doped Pr/Nd/Mg-free low-cobalt La3.0xCexSm0.98-4xZr0.02Ni3.91Co0.14Mn0.25Al0.30(x = 0.08; 0.12; 0.16; 0.20; 0.245) metal hydride electrodes were synthesized for the first time in the literature, and their structural characteristics and electrochemical performance were investigated. The CaCu5-type main phase and Ce2Ni7-type minor phase were found to coexist in the electrodes via XRD analysis. A large volume of the unit cell with increasing values of x led to a lower desorption plateau pressure, and high thermodynamic stability of the hydride and a maximum discharge capacity of 331.2 mA h g(-1) were obtained at x = 0.245. The HRD 3000 of the electrode alloy exhibited 81.40% at x = 0.245, and this contributed to excellent catalytic performance of the CaCu5-type phase and provided phase boundary layers in the Ce2Ni7-type phase. The retention capacity was maintained at 78.30% at x = 0.12 after 100 cycles owing to the combined effect of Ce and Sm. The mechanisms of the related electrochemical thermodynamics and kinetics were also systematically investigated. (C) 2020 Elsevier B.V. All rights reserved.
关键词
作者关键词:Nickel metal hydride battery; Sub-stoichiometry AB(4.6)-type alloy; Sm effect; High-rate discharge capacity
KeyWords Plus:HYDROGEN-STORAGE ALLOYS; ELECTROCHEMICAL PROPERTIES; AS-CAST; PHASE-STRUCTURE; LOW-TEMPERATURE; HIGH-POWER; SURFACE MODIFICATION; CYCLING STABILITY; CO CONTENT; NI
作者信息
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.
通讯作者地址: Ouyang, LZ (通讯作者)
显示更多South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China.
地址:
显示更多[ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
显示更多[ 2 ] South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China
[ 3 ] Sihui City Double Win Ind CO LTD, Sihui, Guangdong, Peoples R China
[ 4 ] China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Peoples R China
[ 5 ] Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, 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
2018YFB1502101
National Natural Science Foundation of China
NSFC51621001
National Natural Science Foundation of China
51771075
National Natural Science Foundation of Guangdong Province
2016A030312011
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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