高首效富镍正极材料LiNi0.6Co0.2Mn0.2O2的合成及电化学性能研究

doi:10.13208/j.electrochem.170317

电化学（中英文） ›› 2018, Vol. 24 ›› Issue (1): 56-62. doi: 10.13208/j.electrochem.170317

• 电镀与表面精饰近期研究专辑( 哈尔滨工业大学安茂忠教授主编) • 上一篇下一篇

高首效富镍正极材料LiNi_0.6Co_0.2Mn_0.2O₂的合成及电化学性能研究

关小云，洪朝钰，朱建平，王伟立，李益孝，杨勇^*

厦门大学固体表面物理化学国家重点实验室，化学化工学院化学系，福建厦门 361005

收稿日期:2017-03-17 修回日期:2017-04-20 出版日期:2018-02-28 发布日期:2017-04-24
通讯作者: 杨勇 E-mail:yyang@xmu.edu.cn
基金资助:
国家自然科学基金项目（No. 21233004, No. 21428303）资助

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

GUAN Xiao-yun, HONG Chao-yu, ZHU Jian-ping, WANG Wei-li, LI Yi-xiao, YANG Yong^*

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China

Received:2017-03-17 Revised:2017-04-20 Published:2018-02-28 Online:2017-04-24
Contact: YANG Yong E-mail:yyang@xmu.edu.cn

摘要/Abstract

摘要：

采用共沉淀—高温固相烧结的方法合成了富镍正极材料LiNi_0.6Co_0.2Mn_0.2O₂(简称NCM622)，通过X射线粉末衍射（XRD）/Rietveld精修法、扫描电子显微镜（SEM）及电化学测试，对不同温度下合成材料的结构、形貌、电化学性能进行表征. 结果表明，800℃下，NCM622阳离子混排程度最低(~1.97%)，首圈库伦效率高达92.2%，100圈容量保持率为81.4%.

关键词: 锂离子电池, 正极材料, LiNi_0.6Co_0.2Mn_0.2O₂ , 首周库仑效率

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.

Key words: lithium-ion battery, cathode material; LiNi_0.6Co_0.2Mn_0.2O₂, initial Coulombic efficiency

中图分类号:

O646

关小云，洪朝钰，朱建平，王伟立，李益孝，杨勇. 高首效富镍正极材料LiNi_0.6Co_0.2Mn_0.2O₂的合成及电化学性能研究[J]. 电化学（中英文）, 2018, 24(1): 56-62.

GUAN Xiao-yun, HONG Chao-yu, ZHU Jian-ping, WANG Wei-li, LI Yi-xiao，YANG Yong. 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.

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https://electrochem.xmu.edu.cn/CN/Y2018/V24/I1/56

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高首效富镍正极材料LiNi_0.6Co_0.2Mn_0.2O₂的合成及电化学性能研究

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

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