| Li3VO4修饰富镍LiNi0.8Co0.1Mn0.1O2正极材料的电化学性能 |
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| 引用本文： | 宋刘斌,唐福利,肖忠良.Li3VO4修饰富镍LiNi0.8Co0.1Mn0.1O2正极材料的电化学性能[J].化工学报,2018,69(12):5332-5338. |
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| 作者姓名： | 宋刘斌 唐福利 肖忠良 |
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| 作者单位： | 长沙理工大学化学与生物工程学院, 湖南 长沙 410114 |
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| 基金项目： | 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）。 |
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| 摘 要： | 采用湿法融合技术及高温固相法合成Li3VO4包覆的LiNi0.8Co0.1Mn0.1O2正极材料。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）等方法研究材料的结晶相、形貌、微观结构。研究表明，Li3VO4均匀地包覆在LiNi0.8Co0.1Mn0.1O2表面，未改变原材料的材料结构和形貌，包覆层厚度为1～2 nm。不同含量的Li3VO4对LiNi0.8Co0.1Mn0.1O2正极材料进行修饰研究表明，3%（质量）Li3VO4包覆的LiNi0.8Co0.1Mn0.1O2在1 C下100次循环后容量保持率为94.13%，具有最佳的倍率性能和循环性能。此外，循环伏安（CV）和交流阻抗（EIS）分析表明，Li3VO4能提高Li+电导率，抑制活性材料与电解液之间的副反应，提高材料的电化学性能。
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| 关 键 词： | LiNi0.8Co0.1Mn0.1O2 包覆 Li3VO4 电化学 稳定性 表面 |
| 收稿时间： | 2018-06-19 |
| 修稿时间： | 2018-09-06 |
Electrochemical performance of Li3VO4 modified Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode materials |
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| SONG Liubin,TANG Fuli,XIAO Zhongliang.Electrochemical performance of Li3VO4 modified Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode materials[J].Journal of Chemical Industry and Engineering(China),2018,69(12):5332-5338. |
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| Authors: | SONG Liubin TANG Fuli XIAO Zhongliang |
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| Affiliation: | School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China |
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| Abstract: | The Li3VO4 coated LiNi0.8Co0.1Mn0.1O2 cathode material was synthesized by wet fusion technology and high temperature solid phase method. The crystalline phase, morphology and microstructure of materials were studied by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that Li3VO4 is evenly coated on the surface of LiNi0.8Co0.1Mn0.1O2 without changing the material structure and morphology of the raw materials. The coating thickness is 1-2 nm. The modification of LiNi0.8Co0.1Mn0.1O2 cathode material with different content of Li3VO4 shows that 3%(mass) Li3VO4 coated LiNi0.8Co0.1Mn0.1O2 has a capacity retention rate of 94.13% after 100 cycles under 1 C, which has the best multiplier performance and cycling performance. In addition, cyclic voltammetry (CV) and alternating current impedance (EIS) analysis show that Li3VO4 can increase Li+ conductivity, inhibit the side-effect between active material and electrolyte, and improve the electrochemical properties of materials. |
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| Keywords: | LiNi0 8Co0 1Mn0 1O2 coated Li3VO4 electrochemistry stability surface |
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