【作者】 王佳伟； 刘静； 杨桂玲； 王荣顺；

【Author】 WANG Jia-wei,LIU Jing,YANG Gui-ling,WANG Rong-shun (Institute of Functional Materials,Department of Chemistry,Northeast Normal University, Changchun 130024,China)

【机构】 东北师范大学化学学院功能材料研究所；

【摘要】 以聚乙烯醇（PVA）为碳源,采用碳热还原法原位合成了Li₃V₂（PO₄）₃/C复合正极材料。XRD结果表明Li₃V₂（PO₄）₃结晶完整为单斜结构,属于P2₁/n空间群。Raman测试结果表明PVA裂解碳中石墨碳（sp²-碳）含量较多,从而大大提高了材料的电导率。电化学测试结果表明该复合材料的电化学性能优异,容量为121.4mAh/g（0.3C）、110.8mAh/g（1C）、103.2mAh/g（3 C）和95.3mAh/g（5C）,并具有良好的循环性能。更多还原

【Abstract】 The Li₃V₂（PO₄）₃/C composite cathode material is synthesized via a simple carbothermal reduction reaction route using polyvinyl alcohol（PVA） as both reduction agent and carbon source.The XRD pattern shows that the as-prepared Li₃V₂（PO₄）₃/C composite has a monoclinic structure with space group P2₁/n.The Raman spectrum reveals that the residual carbon contains much amounts of sp²-type carbon.The sp²-type carbon can largely enhance the electronic conductivity of the Li₃V₂（PO₄）₃/C composite.This cathode material exhibits excellent electrochemical performance.The initial discharge capacities are as high as 121.4mAh/g（0.3C）,110.8 mAh/g（1C）,103.2mAh/g（3C） and 95.3mAh/g（5C）.The cycle ability of this material is perfect.更多还原