【作者】 冯季军； 唐致远； 刘祥哲；

【Author】 Ji-jun Feng 1, Zhi-yuan Tang 2, Xiang-zhe Liu (1School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022; 2School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072)

【机构】 济南大学化学化工学院； 天津大学化工学院；

【摘要】 <正>采用改进的高温固相法合成了阴阳离子复合掺杂改性的锂离子电池尖晶石结构正极材料LiMn1.98La0.02O4-yFy(y=0,0.01,0.02,0.04,0.07,0.10)。用XRD对材料的晶体结构进行了表征。从材料的晶体结构,充放电容量,循环性能和倍率放电特性等方面分析了复合掺杂在稳定晶体结构和改更多还原

【Abstract】 The co-doping modified spinel LiMn1.98La0.02O4-yFy(y=0, 0.01, 0.02, 0.04, 0.07, 0.10)as cathode for lithium ion battery were synthesized with high-temperature solid-state reaction method. X-ray diffraction were used to characterize the crystal structure of the produced materials. The effects of co-doping modification in stabilizing the crystal fram and improving the electrochemical properties were comparatively investigated in terms of crystal structure, charge and discharge capacity, cycle performance and rate performance. The investigation comes to the conclusions that the co-doping modified cathode materials held the high enough initial capacity and represented excellent cycle performance as well. In addition, the rate performance was also improved obviously.更多还原