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| LiFePO_4/CNT复合正极材料的制备与性能研究 | |
| 引用本文： | 吕霄,王天民,罗绍华,惠乐,张中太,唐子龙,张俊英.LiFePO_4/CNT复合正极材料的制备与性能研究[J].稀有金属材料与工程,2009,38(Z2). |
| 作者姓名： | 吕霄 王天民 罗绍华 惠乐 张中太 唐子龙 张俊英 |
| 作者单位： | 1. 北京航空航天大学,北京,100083 2. 东北大学秦皇岛分校,河北,秦皇岛,066004 3. 清华大学,北京,100084 |
| 摘 要： | 以柠檬酸为碳源和螯合剂,通过溶胶-凝胶法制备了LiFePO_4/CNT复合正极粉体材料.利用XRD和SEM表征了复合粉体的结构.复合材料含有单一的磷酸铁锂相,碳纳米管在正极材料中将颗粒与颗粒相连,为颗粒之间提供了附加的导电通路.通过添加碳纳米管的方法对正极材料导电通路进行改善.在低速率下容量可以达到135 mAh/g,在1 C充放电速率下容量保持在110 mAh/g,2 C时容量保持在80 mAh/g.随着碳纳米管含量的增加,锂离子电池的容量也增加. |
| 关 键 词： | 磷酸铁锂 碳纳米管 溶胶-凝胶工艺 正极材料 锂离子电池 |
Preparation and Properties of LiFePO_4/CNT Composite Cathode Material |
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| Lü Xiao,Wang Tianming,Luo Shaohua,Hui Le,Zhang Zhongtai,Tang Zilong,Zhang Junying.Preparation and Properties of LiFePO_4/CNT Composite Cathode Material[J].Rare Metal Materials and Engineering,2009,38(Z2). | |
| Authors: | Lü Xiao Wang Tianming Luo Shaohua Hui Le Zhang Zhongtai Tang Zilong Zhang Junying |
| Abstract: | LiFePO4/CNT composite cathode material was prepared by sol-gel method with citric acid as carbon source and chelator. Structure and morphology of the cathode materials were analyzed by XRD and SEM. The single LiFePO4 phase and amorphous carbon can be found in the products. CNT connects grains in the cathode material,providing the electric conduction channel among grains. The capacity can reach 135 mAh/g under the low charge-discharge rate,keep 110 mAh/g at 1 C and 80 mAh/g at 2 C. As the content of CNT incr... |
| Keywords: | LiFePO_4 carbon nanotube (CNT) sol-gel synthesis cathode material lithium-ion battery |
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