Effect of Sm on performance of Pr/NW/Mg-free and low-cobalt AB(4.6) alloys in nickel-metal hydride battery electrode

时间:2020-07-07作者:浏览量:264


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