| 正极材料LiFePO4的电化学性能的改进 |
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| 引用本文： | 胡环宇,仇卫华,李发喜,赵海雷,王碧燕.正极材料LiFePO4的电化学性能的改进[J].北京科技大学学报,2003,25(6):549-552. |
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| 作者姓名： | 胡环宇 仇卫华 李发喜 赵海雷 王碧燕 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金(No.50272012) |
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| 摘 要： | 采用固相反应法合成了LiFePO4正极材料，在20mA／g的电流密度下进行恒电流充放电，比容量可以达到135mAh/g，为了改进LiFePO4的性能，提高其高倍率性能，尝试了两种途径并合成出Li(Fe0．8Mn0．2)PO4和LiFePO4/C。低倍率充放电实验得出的两个样品的比容量分别可达到145mAh／g和144mAh／g，而且表现出了良好的循环性能和平坦的电压平台，以上两种方法制备出的材料均具有较好的高倍率性能。
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| 关 键 词： | 正极材料 电化学性能 锂离子电池 磷酸铁锂 固相反应法 |
| 修稿时间： | 2003年5月28日 |
Improving Electrochemical Performance of LiFePO4 as a Cathode Material |
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| HU Huanyu,QIU Weihua,LI Faxi,ZHAO Hailei,WANG Biyan
Materials Science and Engineering School,University of Science and Technology Beijing,Beijing ,China.Improving Electrochemical Performance of LiFePO4 as a Cathode Material[J].Journal of University of Science and Technology Beijing,2003,25(6):549-552. |
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| Authors: | HU Huanyu QIU Weihua LI Faxi ZHAO Hailei WANG Biyan
Materials Science and Engineering School University of Science and Technology Beijing Beijing China |
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| Institution: | HU Huanyu,QIU Weihua,LI Faxi,ZHAO Hailei,WANG Biyan
Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China |
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| Abstract: | LiFePO4 was synthesized by solid state reaction. A reversible capacity of 125-138 mAh/g was achieved under a low current density of 20 mA/g at room temperature. In order to improve the electrochemical performance of the material, Li(Fe0.8Mn0.2)PO4 and LiFePO4/C were prepared, respectively. The charge-discharge experiment of the samples showed that the capacities were 145 mAh/g and 144 mAh/g, respectively. They both had a good voltage plateau and exhibited wonderful high current properties. |
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| Keywords: | lithium ion battery positive electrode material lithium iron phosphate |
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