Al_2O_3掺杂对Co-Ni-Mn正极材料性能的影响

Effect of Al_2O_3 doping on the performance of Co-Ni-Mn cathode material

采用XRD分析和充放电测试,研究氧化铝（Al_2O_3）掺杂量x对锂离子正极材料LiNi_（1/3）Co_（1/3-x）Mn_（1/3）Al_xO_2（x=0、1/40、1/20和1/10）性能的影响。当Al_2O_3掺杂量为1/20时,所得LiNi_（1/3）Co_（1/3-1/20）Mn_（1/3）Al_（1/20）O_2材料的结晶度较好且完整,混排度较低。以0.1 C在2.0~4.8 V充放电,正极材料的首次放电比容量为264.47 mAh/g,第20次循环的容量保持率为93.01%,库仑效率为98.37%。

XRD analysis and charge-discharge test were applied to investigate the effect of doped amount of aluminium oxide （AI203 ）on the performance of L-ion battery cathode material LiNil/3Co1/3-xMn1/3 Alx O2 （x = 0,1/40,1/20 and 1/10）. When the doped amount of AI203 was 1/20, the obtained material LiNil/3 COl/3-1/20 Mnl/3 All/20 02 had better crystallinity, the more complete crystal shape and the lower cation mixing. When charged-discharged in 2. 0 - 4. 8 V with 0. 1 C, its initial specific discharge capacity of the cathode material was 264.47 mAh/g, the capacity retention rate was 93.01% at the 20th cycle, the coulombic efficiency was 98. 37%.