Sulfur Substituted LiFePO4/C with Improved Rate Performance for Lithium Ion Batteries

被引：4

作者：

Yu, Tao ^{[1
]}

Wang, Zhao ^{[1
]}

Fu, Yao ^{[1
]}

Xiong, Yachao ^{[1
]}

Guan, Shiyou ^{[1
]}

机构：

[1] East China Univ Sci & Technol, Sch Mat Sci & Engn, Mei Long Rd 130, Shanghai 200237, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2016年 / 11卷 / 07期

关键词：

Sulfur substitution; Lithium iron phosphate; Solid state reaction; Rate performance; ELECTROCHEMICAL PROPERTIES; CATHODE MATERIALS; PHOSPHO-OLIVINES; IRON PHOSPHATE; DOPED LIFEPO4; CONDUCTIVITY; COMPOSITE; ELECTRODE;

D O I：

10.20964/2016.07.47

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Sulfur substituted LiFePO4/C sample was successfully synthesized by solid state method. The importation of sulfur ion can slightly increase the lattice parameters of LiFePO4 while maintaining the original orthorhombic olivine structure. Electrochemical tests show the rate capacity of sulfur substituted LiFePO4/C was significantly improved comparing with LiFePO4/C. The improvement of the rate performance is attributed to the importation of sulfur ion which may expand the Li+ ion diffusion pathway to facilitate charge transfer and Li+ ion diffusion. The results indicate that sulfur substitution can be an effective approach to improve the electrochemical performance of LiFePO4/C cathode materials for lithium ion batteries.

引用

页码：5999 / 6008

页数：10

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