An effective and simple way to synthesize LiFePO4/C composite

被引：85

作者：

Yan, Xuedong ^{[1
,2
]}

Yang, Guiling ^{[1
]}

Liu, Jing ^{[1
]}

Ge, Yucui ^{[1
]}

Xie, Haiming ^{[1
,2
]}

Pan, Xiumei ^{[1
]}

Wang, Rongshun ^{[1
,2
]}

机构：

[1] NE Normal Univ, Dept Chem, Inst Funct Mat, Changchun 130024, Jilin, Peoples R China

[2] Ctr Mat Sci & Technol, LIB Engn Lab, Changchun 130024, Jilin, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2009年 / 54卷 / 24期

关键词：

Li-ion batteries; Lithium iron phosphate; Citric acid; Cathode; Solid-state reaction; ELECTROCHEMICAL PERFORMANCE; PHOSPHO-OLIVINES; CARBON; CATHODE;

D O I：

10.1016/j.electacta.2009.05.048

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The cathode material is synthesized from FeC2O4 center dot 2H(2)O and LiH2PO4 by a solid-state reaction using citric acid as a carbon source. The electric conductivity of the synthesized LiFePO4 has been raised by eight orders of magnitude from 10(-9) S cm(-1). The LiFePO4/C composite shows a greatly enhanced rate performance and the cyclic stability at room temperature. It delivers an initial discharge capacity of 128 mAh g(-1) at 4C, which is retained as high as 92% after 1000 cycles. In addition, the tested low temperature character is attractive. At -20 degrees C, the composite exhibits a discharge capacity of 110 mAh g(-1) at 0.1 C. The homogenous morphology, the porous surface, the small particles inside and the conductive carbon observed contribute much to obtain the favorable electrochemical performance. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：5770 / 5774

页数：5

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