| 尖晶石型LiMn2O4的制备和性能研究 |
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| 引用本文： | 刘烈炜,田炜,赵新强,赵志祥,沈晓虹.尖晶石型LiMn2O4的制备和性能研究[J].电池工业,2003,8(4):147-150. |
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| 作者姓名： | 刘烈炜 田炜 赵新强 赵志祥 沈晓虹 |
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| 作者单位： | 华中科技大学化学系,武汉,430074 |
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| 摘 要： | 利用溶胶-凝胶法制备镧掺杂的锂离子电池正极材料尖晶石型LiLa0.005Mn1.995O4,利用X衍射、循环伏安、充放电测试、交流阻抗等手段对其进行了研究。结果表明样品呈良好的尖晶石结构，在0．3mA／cm^2和3．0～4．1V条件下恒流充放电，其首次放电容量大于110mAh／g，并具有较好的循环可逆性。活性物质在不同的电位下有不同的电化学特征，交流阻抗谱明显不同，并对其进行了合理的解释。
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| 关 键 词： | 锂离子电池 尖晶石型LiMn2O4 交流阻抗 掺杂 |
| 文章编号： | 1008-7923(2003)04-0147-04 |
| 修稿时间： | 2002年11月9日 |
Studies on preparation and electrochemical properties of La-doped spinel LiMn2O4 electrode material |
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| LIU Lie - wei,TIAN wei,ZHAO Xinq - qiang,ZHAO Zhi - xiang,SHEN Xiao - hong.Studies on preparation and electrochemical properties of La-doped spinel LiMn2O4 electrode material[J].Chinese Battery Industry,2003,8(4):147-150. |
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| Authors: | LIU Lie - wei TIAN wei ZHAO Xinq - qiang ZHAO Zhi - xiang SHEN Xiao - hong |
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| Abstract: | The positive material made of spinel LiLao.oosMni. 99564 of lithium ion battery was prepared by a sol - gel method. Its crystalline type and electrochemical properties were measured by XRD, cyclic voltam-metry, charge - discharge at constant current and AC impedance methods. The results revealed that the sample exhibited good single - phase spinel structure. Under the condition of 0. 4mA/cm2 and 3.0-4. IV, charge and discharge is carried out galvanostaically, the sample had the first discharge capacity of more than 110mh/g, and had better cyclability. The active material had different characteristics at different potential, and the AC impedance spectrum was different. And a reasonable explanation was showed at the same time. |
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| Keywords: | Lithium - ion battery Spinel LiMn2O4 AC impedance Doped |
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