无机材料学报2012，Vol.27Issue(10)：1017-1022,6.DOI:10.3724/SP.J.1077.2012.11735
锂离子电池正极材料Li3V2-2x/3Mnx(PO4)3的溶胶-凝胶法合成和电化学性能
Sol-Gel Synthesis and Electrochemical Performance of Li3V2-2x/3Mnx(PO4)3 Cathode Material for Lithium-ion Batteries
摘要
Abstract
Novel cathode material LisV2-2x/3Mnx(PO4)3/C was successfully synthesized by Sol-Gel method using CH3COOLi·2H2O, V2O5, Mn(CH3COO)2·4H2O, (NH4)2HPO4 and sucrose as raw materials. The as-prepared products were characterized by XRD, XPS, SEM.The results show that a small amount of Mn2+doping do not alter the structure of Li3V2(PO4)3 materials with a monoclinic structure (space group P21/n), and the valence states of V and Mn in Li3V1.94Mn0.09(PO4)3/C are +3 and +2, respectively. The Li3V1.94Mn0.09(PO4)3 particle with uniform shape of sphere and diameter less than 200 nm, shows the best cyclic stability and rate performance. Controlling the charge and discharge voltage range from 3.0 to 4.8 V at the rate of 0.1C, the first charge and discharge capacity of Li3V1.94Mn0.09(PO4)3 are up to 182.1 and 168.8 mAh/g, respectively, and its discharge efficiency is up to 92.69%. After 100 cycles, its discharge capacity can also retain 77.4% of the first one.关键词
正极材料/锂离子电池/Li3V2-2x/3Mnx(PO4)3/溶胶-凝胶法Key words
cathodic materials/ lithiumion batteries/ LisV2-2x/3Mnx(PO4)3/ Sol-Gel method分类
信息技术与安全科学引用本文复制引用
刘国聪,刘又年,刘素琴,董辉..锂离子电池正极材料Li3V2-2x/3Mnx(PO4)3的溶胶-凝胶法合成和电化学性能[J].无机材料学报,2012,27(10):1017-1022,6.基金项目
国家自然科学基金(51162026) （51162026）
中国博士后基金(20100480949,201104509) （20100480949,201104509）
中南大学博士后基金 （）
