文献类型：期刊文献

英文题名：Sulfur Substituted LiFePO4/C with Improved Rate Performance for Lithium Ion Batteries

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

年份：2016

卷号：11

期号：7

起止页码：5999

外文期刊名：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000384905600055)】；

语种：英文

外文关键词：Sulfur substitution; Lithium iron phosphate; Solid state reaction; Rate performance

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.