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Chin. J. Process Eng. ›› 2018, Vol. 18 ›› Issue (2): 422-426.DOI: 10.12034/j.issn.1009-606X.217296

• Materials Engineering • Previous Articles     Next Articles

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

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

  1. 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

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. 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
  • 通讯作者: 马紫峰 zfma@sjtu.edu.cn

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

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