LiMn_2O_4改性材料的性能研究  

The studies on the performance of modified LiMn_2O_4 materials

作　　者：金维华[1] 卢世刚[1] 蔡振平[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《电池》2005年第3期176-177,共2页Battery Bimonthly

基　　金：国家自然科学基金资助项目(50074012)

摘　　要：利用高温固相反应,制备出由含Al化合物、LiF改性的锂锰氧化物。对材料进行了XRD分析及电化学测试,结果表明:改性材料保持了尖晶石结构;由Al3+、F-共同改性材料的高温循环性能得到改善,改性前的LiMn2O4,在50℃下10次循环后,容量衰减率为24 4%,而由Al2(C2O4)3与LiF改性的材料则为6 2%。<Abstrcat>The lithium manganese oxides modified by aluminum composites and LiF were prepared by high-temperature solid state reaction. The materials were investigated by XRD analysis and electrochemical test. The results indicated that the modified materials kept spinel structure. The high temperature cyclic performance of material modified with both Al^(3+) and F^- was improved. The capacity loss of LiMn_2O_4 before modification after 10 cycles at 50 ℃ was 24.4% and the material modified by Al_2(C_2O_4)_3 and LiF was 6.2%.

关 键 词：LIMN2O4 锂离子电池 固相反应 改性 

分 类 号：TM911[电气工程—电力电子与电力传动]