CAJ | 학술논문

用正交实验,通过XRD、SEM及电化学性能分析,优化了锂离子电池正极材料LiMn_2O_4的高温固相合成工艺.对产物性能影响的顺序为:锂锰物质的量比>烧结温度>恒温时间.在n(Li):n(Mn)=0.525:1.000、烧结温度为820 ℃及恒温时间为14 h时,合成的LiMn_2O_4的综合性能最好,尖晶石结构和表面形貌良好,1 C首次放电比容量为119.0 mAh/g,第50次循环的容量保持率为95.8%.
용정교실험,통과XRD、SEM급전화학성능분석,우화료리리자전지정겁재료LiMn_2O_4적고온고상합성공예.대산물성능영향적순서위:리맹물질적량비>소결온도>항온시간.재n(Li):n(Mn)=0.525:1.000、소결온도위820 ℃급항온시간위14 h시,합성적LiMn_2O_4적종합성능최호,첨정석결구화표면형모량호,1 C수차방전비용량위119.0 mAh/g,제50차순배적용량보지솔위95.8%.
Using the orthogonal experiment,the high-temperature solid-phase synthesizing process for Li-ion battery cathode material LiMn_2O_4 was optimized by XRD,SEM and electrochemical performance analyses. The order of influencing the performance of the products was:molar ratio of lithium to manganese>sintering temperature>thermostatic time. The LiMn_2O_4 synthesized at n(Li):n(Mn)=0.525:1.000,820 ℃ of sintering temperature and 14 h of thermostatic time had the best comprehensive performance. It had fine spinel structure and surface morphology,the initial specific discharge capacity at 1 C was 119.0 mAh/g,the capacity retention rate at the 50th cycle was 95.8%.