Microemulsion synthesis of LiFePO4/C and its electrochemical properties as cathode materials for lithium-ion cells

被引：48
|
作者：
Xu, Zhihui
Xu, Liang
Lai, Qiongyu [1 ]
Ji, Xiaoyang
机构：
[1] Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China
[2] Nanjing Agr Univ, Coll Sci, Nanjing 210095, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 105卷 / 01期
关键词：
lithium iron phosphate; microemulsion synthesis; cathode material; lithium-ion cells; electrochemical performance;
D O I：
10.1016/j.matchemphys.2007.04.039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The clectroactive LiFePO4/C nano-composite powders have been synthesized by a microemulsion method. The material were characterized by X-ray powder diffraction, X-ray photoelectron spectroscopic, scanning electron microscopy and its electrochemical properties were investigated by cyclic voltammetry, AC impedance and charge-discharge tests. The as-prepared LiFePO4/C composite had a high capacity of 163 mAb g(-1) at the C/10 rate, i.e. 95.9% of the theoretical capacity. The composite also display a good rate capability and stable cycle-life. The improved electrode performance originates mainly from the fine particle of nanometric dimension and the uniform size distribution in the product as well as the increase in electronic conductivity by the carbon coating. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：80 / 85
页数：6
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