电源技术2012，Vol.36Issue(5)：636-638,698,4.
多孔结构Li3V2(PO4)3/C正极材料的制备及电化学性能
Preparation and electrochemical performance of macporous Li3V2(PO4)3/C cathode material
摘要
Abstract
The macporous Li3V2(PO4)3C composite was synthesized by solid-state reaction using Li2CO3, NH4H,PO4, V2O5,oxalic acid and starch. The influence of calcination temperature on the material morphology and electrochemical performance was also investigated. The samples prepared at different temperatures were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).The results show that the sample synthesized at 800℃ presents the best macporous morphology and electrochemical performance. The initial discharge specific capacity of the sample is 130.0 mAh/g at 0.1 Cand after 20 cycles the discharge specific capacity is 124.9 mAh/g with 96.1% retention of the initial capacity. Even at 2 C after 50 cycles the discharge specific capacity is still up to 91.5 mAh/g with the capacity loss of only 7%. The reasons for the excellent electrochemical performance of the macporous Li3V2 (PO4)3c sintered at 800℃ cathode material were discussed.关键词
锂离子电池/正极材料/磷酸钒锂/多孔结构Key words
lithium-ion battery/ cathode material/ lithium vanadium phosphates/ macporous分类
信息技术与安全科学引用本文复制引用
张新,刘素琴,黄可龙,房雪松,程凤..多孔结构Li3V2(PO4)3/C正极材料的制备及电化学性能[J].电源技术,2012,36(5):636-638,698,4.基金项目
中南大学研究生学位论文创新基金(2010ssxt014) （2010ssxt014）
