| Ti, F复合掺杂改进LiNi1/3Co1/3Mn1/3O2正极材料的电化学性能 |
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| 引用本文： | 丁燕怀,张平,姜勇,尹久仁,卢其斌,高德淑.Ti, F复合掺杂改进LiNi1/3Co1/3Mn1/3O2正极材料的电化学性能[J].高等学校化学学报,2007,28(10):1839-1841. |
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| 作者姓名： | 丁燕怀 张平 姜勇 尹久仁 卢其斌 高德淑 |
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| 作者单位： | 1. 湘潭大学土木工程与力学学院基础力学与材料工程研究所,湘潭,411105
2. 湘潭大学化学学院,湘潭,411105 |
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| 基金项目： | 国家自然科学基金
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湖南省科技厅科研项目 |
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| 摘 要： | 采用复合离子掺杂技术对LiNi1/3Co1/3Mn1/3O2进行改性, 并对材料的结构及电化学性能进行了考察.
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| 关 键 词： | 正极材料 电化学性能 复合掺杂 电荷转移阻抗 |
| 文章编号： | 0251-0790（2007）10-1839-03 |
| 收稿时间： | 2007-05-22 |
| 修稿时间： | 2007-05-22 |
Improvement on the Electrochemical Properties of Cathode Material LiNi1/3CO1/3Mn1/3O2 by Ti-F Co-substitution |
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| DING Yan-Huai,ZHANG Ping,JIANG Yong,YIN Jiu-Ren,LU Qi-Bin,GAO De-Shu.Improvement on the Electrochemical Properties of Cathode Material LiNi1/3CO1/3Mn1/3O2 by Ti-F Co-substitution[J].Chemical Research In Chinese Universities,2007,28(10):1839-1841. |
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| Authors: | DING Yan-Huai ZHANG Ping JIANG Yong YIN Jiu-Ren LU Qi-Bin GAO De-Shu |
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| Institution: | College of Civil Engineering &; Mechanics,
Institute of Fundamental Mechanics &; Material Engineering,
College of Chemistry, Xiangtan University, Xiangtan 411105, China |
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| Abstract: | Layered LiNi1/3Co1/3Mn1/3O2 as the cathode materials for lithium ion batteries was synthesized with the co-precipitated metal carbonate as the precursor. The effects of Ti-F co-substitution on the structure and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 were studied by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), electrochemical impedance spectroscopy(EIS) and galvanostatic charge-discharge experiments. Ti-F co-substitution leads to the change in the content of transition metal ions with a low valence, thereby induces an expansion in lattice volume. Furthermore, the increase of charge-transfer resistances during the cycling was suppressed by Ti-F co-substitution. The initial discharge capacity of substituted sample is 165.23 mA·h/g and the capacity retention rate is 94.9% up to 20 cycles. |
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| Keywords: | Cathode material Electrochemical property Co-substitution Charge-transfer resistance |
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