铷掺杂三元正极材料Li1-xRbxNi0.4Co0.2Mn0.4O2的制备及其电化学性能

doi:10.12034/j.issn.1009-606X.217296

过程工程学报 ›› 2018, Vol. 18 ›› Issue (2): 422-426.DOI: 10.12034/j.issn.1009-606X.217296

铷掺杂三元正极材料Li1-xRbxNi0.4Co0.2Mn0.4O2的制备及其电化学性能

李妍¹，汪小平²，张维民¹，何雨石¹，马紫峰^1*

1. 上海交通大学化学化工学院，上海电化学能源器件工程技术研究中心，上海 200240；2. 上海铷戈科技发展有限公司，上海 200433

收稿日期:2017-08-15 修回日期:2017-09-07 出版日期:2018-04-22 发布日期:2018-04-10
通讯作者: 马紫峰 zfma@sjtu.edu.cn

Synthesis and Electrochemical Characterization of Li1?xRbxNi0.4Co0.2Mn0.4O2 Cathode Materials

Yan LI¹, Xiaoping WANG², Weimin ZHANG¹, Yushi HE¹, Zifeng MA¹^*

1. Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. Shanghai Ruge Technology Development Co., Ltd., Shanghai, 200433, China

Received:2017-08-15 Revised:2017-09-07 Online:2018-04-22 Published:2018-04-10
Contact: Zi-Feng MA zfma@sjtu.edu.cn

摘要/Abstract

摘要： 采用共沉淀法制备了三元材料LiNi0.4Co0.2Mn0.4O2，掺杂不同比例铷进行改性，对其进行了结构表征，考察了其电化学性能. 结果表明，Li0.97Rb0.03Ni0.4Co0.2Mn0.4O2样品的结晶度较好，铷掺杂起到了稳定三元材料晶体结构的作用，有效改善了材料的电化学性能，5C倍率下放电比容量达130 mA?h/g.

关键词: LiNi0.4Co0.2Mn0.4O2正极材料, 铷掺杂, 锂离子电池

Abstract: LiNi0.4Co0.2Mn0.4O2 was prepared by coprecipitation method and different proportions of rubidium cations were doped into the materials to enhance the performance. The materials were characterized and the electrochemical performance was investigated. The results showed that the optimized formula is Li0.97Rb0.03Ni0.4Co0.2Mn0.4O2, which obtained an improved electrochemical performance. The incorporation of rubidium can stabilize the crystal structure. The specific reversible capacity of Li0.97Rb0.03Ni0.4Co0.2Mn0.4O2 electrode can still maintain about 130 mA?h/g at 5C.

Key words: LiNi0.4Co0.2Mn0.4O2 cathode material, rubidium doping, lithium-ion battery

李妍汪小平张维民何雨石马紫峰. 铷掺杂三元正极材料Li1-xRbxNi0.4Co0.2Mn0.4O2的制备及其电化学性能[J]. 过程工程学报, 2018, 18(2): 422-426.

Yan LI Xiaoping WANG Weimin ZHANG Yushi HE Zifeng MA. Synthesis and Electrochemical Characterization of Li1?xRbxNi0.4Co0.2Mn0.4O2 Cathode Materials[J]. Chin. J. Process Eng., 2018, 18(2): 422-426.

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铷掺杂三元正极材料Li1-xRbxNi0.4Co0.2Mn0.4O2的制备及其电化学性能

Synthesis and Electrochemical Characterization of Li1?xRbxNi0.4Co0.2Mn0.4O2 Cathode Materials

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