Effects of Preparation Temperature on Pyrolytic Carbon Coated LiFePO4/Vapor-grown Carbon Fiber (PCLFP/VGCF) Composite Cathode Material

被引：2
|
作者：
Deng Fei [1 ]
Zeng Xie-Rong [2 ,3 ]
Zou Ji-Zhao [2 ,3 ]
Li Xiao-Hua [2 ,3 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China
[2] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China
[3] Shenzhen Key Lab Special Funct Mat, Shenzhen 518060, Peoples R China
来源：
JOURNAL OF INORGANIC MATERIALS | 2011年 / 26卷 / 11期
关键词：
lithium iron phosphate; pyrolytic carbon; vapor-grown carbon fiber; microwave chemical vapor deposition; lithium ion batteries; ELECTROCHEMICAL PROPERTIES; PHOSPHO-OLIVINES; DOPED LIFEPO4/C; PERFORMANCE; DEPOSITION; NANOTUBES; VGCFS;
D O I：
10.3724/SP.J.1077.2011.01141
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Pyrolytic carbon coated LiFePO4/vapor-grown carbon fiber (PCLFP/VGCF) composite cathode materials were prepared by microwave chemical vapor deposition (MCVD) process. Effects of preparation temperature on microstructures and electrochemical properties of the composites were investigated. The results show that with preparation temperature increasing from 500 degrees C to 600 degrees C, the discharge capacities of the composite electrodes are improved because of the gradual formation of conductive network of VGCF. However, it decreases when the preparation temperature is up to 700, which may be attributed. to the exaggerated grain growth of LiFePO4 and the reduction of VGCF network. In addition, the composite cathode materials prepared at 600 degrees C show better electrochemical properties, with the discharge capacity as high as 163, 159, 153 and 143mAh/g at rate of 0.2C, 0.5C, 1C, 3C, respectively (25 degrees C).
引用
收藏
页码：1141 / 1146
页数：6
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