Synthesis and Electrochemical Properties of Nickel-Rich Cathode Material LiNi_0.6Co_0.2Mn_0.2O₂ with High Initial Coulombic Efficiency

Authors

Xiao-yun GUAN, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Chao-yu HONG, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Jian-ping ZHU, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Wei-li WANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Yi-xiao LI, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Yong YANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow

Corresponding Author

Yong YANG(yyang@xmu.edu.cn)

Abstract

Nickel-rich cathode materials LiNi_0.6Co_0.2Mn_0.2O₂（NCM622）were synthesized by a co-precipitation-solid state sintering method at different temperatures. The structure, morphology and electrochemical performance of the as-prepared materials were investigated by X-ray powder diffraction (XRD) /Rietveld refinement, scanning electron microscope (SEM) and electrochemical experiments. It is found that NCM622 calcined at 800 ℃ showed the lowest degree of cation disorder (~1.97%) with a high initial Coulombic effiency of 92.2% and the capacity retention of 81.4% after 100 cycles.

Graphical Abstract

Keywords

lithium-ion battery, cathode material; LiNi0.6Co0.2Mn0.2O2, initial Coulombic efficiency

DOI Link

https://doi.org/10.13208/j.electrochem.170317

Publication Date

2018-02-28

Online Available Date

2017-04-24

Revised Date

2017-04-20

Received Date

2017-03-17

Recommended Citation

Xiao-yun GUAN, Chao-yu HONG, Jian-ping ZHU, Wei-li WANG, Yi-xiao LI, Yong YANG. Synthesis and Electrochemical Properties of Nickel-Rich Cathode Material LiNi_0.6Co_0.2Mn_0.2O₂ with High Initial Coulombic Efficiency[J]. Journal of Electrochemistry, 2018 , 24(1): 56-62.
DOI: 10.13208/j.electrochem.170317
Available at: https://jelectrochem.xmu.edu.cn/journal/vol24/iss1/7