Electrochemical Performance of Li3V2 (PO4)3/C Cathode Material Prepared by Soft Chemistry Route

摘要：

Monoclinic Li3V2 (PO4)3/C cathode material has been synthesized by soft chemistry route and the electrochemical performance of this material was investigated. The structure of the particles was characterized by X-ray diffraction (XRD). The Li3V2 (PO4)3/C composite exhibits good cycling performance and excellent rate capabilities when cycled between 3.0 and 4.3 V. At 1C rate, the cell displays a reversible capacity of 117 mAh/g and retains 98.1 ％ of its initial discharge capacity after 50 cycles. At the high rate of 5C, the capacity could reach 109 mAh/g, corresponding to 93 ％ of that at 0.5C. Electrochemical impedance spectroscopy (EIS) technique was used to analyze the chemical diffusion coefficient of Li.

关键词： Lithium vanadium phosphate Cathode material EIS Lithium-ion batteries

作者: Feng Wang Feng Wu Chuan Wu Ying Bai Lian Wang

作者单位: School of Chemical Engineering and the Environment,Beijing Institute of Technology,Beijing 100081,Ch Chongqing Academy of Science and Technology,Chongqing 401123,China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 521-525

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）