| 尖晶石型LiMn2O4电极材料交流阻抗的研究 |
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| 引用本文： | 刘烈炜,赵新强,聂进,辛富东.尖晶石型LiMn2O4电极材料交流阻抗的研究[J].华中科技大学学报(自然科学版),2002,30(5):108-110. |
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| 作者姓名： | 刘烈炜 赵新强 聂进 辛富东 |
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| 作者单位： | 1. 华中科技大学化学系
2. 中原油田公安处 |
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| 摘 要： | 利用柠檬酸络合法制备锂离子正极材料尖晶石型LiMn2O4，利用X衍射，循环伏安，冲放电测试，交流阻抗等手段对其进行了研究，发现活性物质在不同的电位下具有不同的电化学特征，当电位处在平台区时和处在非平台区时，交流阻抗谱明显不同，电位处于非充放电平台区时，高频表现为锂离子电极材料中的固态扩散，处在充放电平台区时，高频表现为电子到达活性物质的通道的阻抗。
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| 关 键 词： | 锂离子电池 尖晶石型LiMn2O4 交流阻抗 柠檬酸络合法 |
| 文章编号： | 1671-4512(2002)05-0108-03 |
| 修稿时间： | 2001年9月26日 |
Study of AC impedance of spinel LiMn2O4 electrode material |
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| Liu Liewei Zhao Xinqiang Nie Jin Xin Fudong Assoc. Prof., Dept. of Chemistry, Huazhong Univ. of Sci. and Tech.,Wuhan ,China..Study of AC impedance of spinel LiMn2O4 electrode material[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2002,30(5):108-110. |
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| Authors: | Liu Liewei Zhao Xinqiang Nie Jin Xin Fudong Assoc Prof Dept of Chemistry Huazhong Univ of Sci and Tech Wuhan China |
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| Institution: | Liu Liewei Zhao Xinqiang Nie Jin Xin Fudong Assoc. Prof., Dept. of Chemistry, Huazhong Univ. of Sci. and Tech.,Wuhan 430074,China. |
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| Abstract: | The positive material spinel LiMn 2O 4 of lithium ion battery was prepared by a modified citric acid complexation method. Its crystalline type and electrochemical properties were measured by XRD, cyclic voltammetry, and charge discharge at constant current and ac impedance. The results showed that active material had different characteristics at different potential. When in platform or not in platform, the ac impedance spectrum was different. When not in platform, the graph of high frequency stands for the solid diffusing of Li + in the electrode material, while in the platform, the graph of high frequency stands for the passage impedance of the electron moving to. |
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| Keywords: | lithium ion battery spinel LiMn 2O 4 AC impedance |
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