Composite materials of Li2ZrO3 coated LiNi0.8Co0.1Mn0.1O2 and its electrochemical properties

doi:10.11949/j.issn.0438-1157.20170536

CIESC Journal ›› 2017, Vol. 68 ›› Issue (11): 4390-4397.DOI: 10.11949/j.issn.0438-1157.20170536

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Composite materials of Li₂ZrO₃ coated LiNi_0.8Co_0.1Mn_0.1O₂ and its electrochemical properties

SONG Liubin¹, LIU Jiao¹, XIAO Zhongliang¹, LI Lingjun², CAO Zhong¹, HU Chaoming¹, LI Xinyu¹, TANG Fuli¹

1 Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China;
2 College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China

Received:2017-05-02 Revised:2017-05-25 Online:2017-11-05 Published:2017-11-05
Supported by:
supported by the National Natural Science Foundation of China (21501015, 21545010, 31527803), the STS Project of the Chinese Academy of Sciences (KFJ-SW-STS-173), the Natural Science Foundation of Hunan Province (2016JJ3007) and the Hunan Provincial Scientific Program of China (2015GK1046).

Li₂ZrO₃包覆LiNi_0.8Co_0.1Mn_0.1O₂的复合材料及其电化学性能

宋刘斌¹, 刘姣¹, 肖忠良¹, 李灵均², 曹忠¹, 胡超明¹, 李新宇¹, 唐福利¹

1 长沙理工大学化学与生物工程学院, 电力与交通材料保护湖南省重点实验室, 湖南长沙 410114;
2 长沙理工大学材料科学与工程学院, 湖南长沙 410114

通讯作者: 肖忠良
基金资助:
国家自然科学基金项目（21501015，21545010，31527803）；中国科学院环境监测STS项目（KFJ-SW-STS-173）；湖南省自然科学基金项目（2016JJ3007）；湖南省科技计划项目（2015GK1046）。

Abstract

Abstract:

Li₂ZrO₃ coated LiNi_0.8Co_0.1Mn_0.1O₂ cathode material for lithium ion battery was synthesized by a wet chemical method which using Zr(NO₃)₄·5H₂O and CH₃COOLi·2H₂O as raw materials, and the influences of the different content of Li₂ZrO₃ on the electrochemical properties of LiNi_0.8Co_0.1Mn_0.1O₂ was studied. SEM, TEM and EDS spectra showed that Li₂ZrO₃ coating was uniformly coated on the surface of LiNi_0.8Co_0.1Mn_0.1O₂ with a thickness of about 8 nm. Compared with the pristine material, LiNi_0.8Co_0.1Mn_0.1O₂ coated with 1%(mass) Li₂ZrO₃ exhibited excellent cycle stability with 91.77% capacity retention rate after 100 cycles at 1.0 C(the first discharge capacity was 184.7 mA·h·g^-1, and the specific capacity after 100 cycles was 169.5 mA·h·g^-1). The results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests demonstrated that the Li₂ZrO₃ coating suppressed the side reaction between cathode material and electrolyte, and reduced the charge transfer resistance of the material during cycling, thus improved the electrochemical properties of the material.

Key words: Li₂ZrO₃, coating, LiNi_0.8Co_0.1Mn_0.1O₂, surface, composite material, electrochemistry

摘要：

以Zr（NO₃）₄·5H₂O和CH₃COOLi·2H₂O为原料，采用湿化学法，将Li₂ZrO₃包覆在LiNi_0.8Co_0.1Mn_0.1O₂锂离子电池正极材料的表面，研究Li₂ZrO₃不同包覆比例对LiNi_0.8Co_0.1Mn_0.1O₂电化学性能的影响。SEM、TEM、EDS谱图分析表明，Li₂ZrO₃层均匀地包覆在LiNi_0.8Co_0.1Mn_0.1O₂表面，其厚度约为8 nm。与纯相相比，1%（质量分数） Li₂ZrO₃包覆的LiNi_0.8Co_0.1Mn_0.1O₂复合材料在1.0 C下首次放电比容量为184.7 mA·h·g^-1、100次循环之后放电比容量为169.5 mA·h·g^-1，其容量保持率达到91.77%，表现出良好的循环稳定性。循环伏安（CV）和电化学阻抗（EIS）测试结果表明，Li₂ZrO₃包覆层抑制了正极材料与电解液之间的副反应，减小了材料在循环过程中的电荷转移阻抗，从而提高了材料的电化学性能。

关键词: Li₂ZrO₃, 包覆, LiNi_0.8Co_0.1Mn_0.1O₂, 表面, 复合材料, 电化学

CLC Number:

TM912.9

SONG Liubin, LIU Jiao, XIAO Zhongliang, LI Lingjun, CAO Zhong, HU Chaoming, LI Xinyu, TANG Fuli. Composite materials of Li₂ZrO₃ coated LiNi_0.8Co_0.1Mn_0.1O₂ and its electrochemical properties[J]. CIESC Journal, 2017, 68(11): 4390-4397.

宋刘斌, 刘姣, 肖忠良, 李灵均, 曹忠, 胡超明, 李新宇, 唐福利. Li₂ZrO₃包覆LiNi_0.8Co_0.1Mn_0.1O₂的复合材料及其电化学性能[J]. 化工学报, 2017, 68(11): 4390-4397.

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Composite materials of Li₂ZrO₃ coated LiNi_0.8Co_0.1Mn_0.1O₂ and its electrochemical properties

Li₂ZrO₃包覆LiNi_0.8Co_0.1Mn_0.1O₂的复合材料及其电化学性能

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