材料科学与工程学报2012，Vol.30Issue(5)：757-760,774,5.
Bi和F复合掺杂对LiMn2O4结构及电化学性能的影响
Influence of Bi and F Co-doping on the Structural and Electrochemical Properties of LiMn2O4
摘要
Abstract
Spinel LiMn2-xBixO4-yFy(x=0,0.03;y=0,0.05,0.1) were synthesized by solid state reaction.The synthesized materials were characterized by X-ray diffraction,scanning electron microscope,galvanostatic charge-discharge and cyclic voltammetry techniques to study the structure,surface morphology and electrochemical performance.The results show that all the synthesized materials are of pure spinel phase with smooth surface and uniform size.When cycled for 30 times at the charge-discharge rate of 0.2 C,LiMn1.97Bi0.03O3.95F0.05 with the capacity retentions of 90.88%,which is much higher than 86.51% of LiMn2O4.When cycled for 100 times at room temperature and 55℃ at the charge-discharge rate of 1 C,the capacity retention of LiMn1.97Bi0.03O3.95F0.05 are 91.81% and 83.69%,respectively,which are much higher than 78.65% and 71.82% for LiMn2O4.Bi and F co-doping can enhance the stability and cycling behavior of LiMn2O4,especially the cyclability at elevated temperature.关键词
锂离子电池/锰酸锂/掺杂/电化学性能Key words
lithium ion battery/lithium manganese oxide/doping/electrochemical performance分类
信息技术与安全科学引用本文复制引用
刘金练,麦发任,吴显明,李雷勇,施雯..Bi和F复合掺杂对LiMn2O4结构及电化学性能的影响[J].材料科学与工程学报,2012,30(5):757-760,774,5.基金项目
吉首大学校级科研资助项目 （）
湘西州科研资助项目 （）
