| 尖晶石型LiMn2O4阴极材料电化学性能研究 |
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| 引用本文： | 刘烈炜,赵新强,辛富东. 尖晶石型LiMn2O4阴极材料电化学性能研究[J]. 材料开发与应用, 2002, 17(4): 4-7 |
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| 作者姓名： | 刘烈炜 赵新强 辛富东 |
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| 作者单位： | 华中科技大学化学系,武汉,430074;中原油田公安处,濮阳,457000 |
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| 摘 要： | 利用柠檬酸络合法制备锂离子电池正极材料尖晶石型LiMn2 O4,利用X射线衍射、循环伏安、充放电测试、交流阻抗等手段对它进行了研究。发现活性物质在不同的电位下具有不同的电化学特征 ,电位处在平台区时与处在非平台区时相比 ,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 ,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 |
| 文章编号： | 1003-1545(2002)08-0004-04 |
| 修稿时间： | 2001-12-07 |
Study of Electrochemical Behavior of Spinel LiMn2O4 Cathode Material |
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| Liu Liewei ) Zhao Xinqiang ) Xin Fudong ). Study of Electrochemical Behavior of Spinel LiMn2O4 Cathode Material[J]. Development and Application of Materials, 2002, 17(4): 4-7 |
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| Authors: | Liu Liewei ) Zhao Xinqiang ) Xin Fudong ) |
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| Affiliation: | Liu Liewei 1) Zhao Xinqiang 1) Xin Fudong 2) |
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| Abstract: | The positive material spinal LiMn 2O 4 of lithium ion battery is prepared by a modified citric acid complexation method. Its crystalline type and electrochemical properties are measured through XRD, cyclic voltammetry, charge discharge at constant current and AC impedance test. The results show that active material has different characteristic at different potential. The AC impedance spectrum is different in and off platform. Off the platform, the graph of high frequency stand for the solid diffusing of Li + in the electrode material, and in the platform, the graph of high frequency stand for the impedance of the passage the electron moving to. |
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| Keywords: | Lithium ion battery Spinel LiMn 2O 4 AC impedance |
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