| Effects of La2O3/Li2O/TiO2- Coating on Electrochemical Performance of LiCoO2 Cathode |
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| 作者姓名： | 王洪 祝纶宇 陈鸣才 |
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| 作者单位： | [1]Key Laboratory of Polymer for Electronics, Guangdong Province, Guangzhou Institute of Chemistry, ChineseAcademy of Sciences, Guangzhou 510650, China [2]Department of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, China |
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| 基金项目： | Key Program Project of Natural Science Foundation of Guangdong Province （06105562） |
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| 摘 要： | Conventional cathode material （LiCoO2） was modified by coating with a thin layer of La2O3/Li2O/TiO2 for improving its performance for lithium ion battery. The morphology and structure of the modified cathode material was characterized by SEM, XRD, and Auger electron spectroscopy. The performance of the cells with the modified cathode material was examined, including the cycling stability, the diffusion coefficient under different voltages, and the C-rate discharge. The results showed that the cell composed of the coated cathode material discharged at a large current density, and possesses a stable cycle performance in the range from 3.0 to 4.4 V. It was explained that the rate of Li ion diffusion increased in the cell while using La2O3/Li2O/TiO2-coated LiCoO2 as the cathode and the coating layer may act as a faster ion conductor （La2O3/Li2O/TiO2）.
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| 关 键 词： | 锂离子电池 钴酸锂 阴极材料 电化学性能 三氧化二镧 二氧化锂 二氧化钛 |
| 文章编号： | 1002-0721（2007）01-0124-05 |
| 收稿时间： | 15 June 2006 |
| 修稿时间： | 2006-06-152006-12-30 |
Effects of La2O3/Li2O/TiO2-Coating on Electrochemical Performance of LiCoO2 Cathode |
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| Wang , Zhu Lunyu,Chen Mingcai.Effects of La2O3/Li2O/TiO2- Coating on Electrochemical Performance of LiCoO2 Cathode[J].Journal of Rare Earths,2007,25(1):124-128. |
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| Authors: | Wang Zhu Lunyu Chen Mingcai |
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| Affiliation: | 1. Key Laboratory of Polymer for Electronics, Guangdong Province, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China ; 2. Department of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, China |
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| Abstract: | Conventional cathode material (LiCoO2) was modified by coating with a thin layer of La2O3/Li2O/TiO2 for improving its performance for lithium ion battery. The morphology and structure of the modified cathode material was characterized by SEM, XRD, and Auger electron spectroscopy. The performance of the cells with the modified cathode material was examined, including the cycling stability, the diffusion coefficient under different voltages, and the C-rate discharge. The results showed that the cell composed of the coated cathode material discharged at a large current density, and possesses a stable cycle performance in the range from 3.0 to 4.4 V. It was explained that the rate of Li ion diffusion increased in the cell while using La2O3/Li2O/TiO2-coated LiCoO2 as the cathode and the coating layer may act as a faster ion conductor (La2O3/Li2O/TiO2). |
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| Keywords: | La2O3/Li2O/TiO2-coated LiCoO2 lithium-ion batteries diffusion coefficient fast ion conductor rare earths |
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