不同铝盐对LiMn_2O_4改性材料性能的影响  

Performance!of LiMn_2O_4 Materials Modified by Different Alumium Salts

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矿物资源与冶金材料所,北京100088

出　　处：《稀有金属》2005年第4期530-533,共4页Chinese Journal of Rare Metals

基　　金：国家自然科学基金资助项目(50074012)

摘　　要：采用铝盐与尖晶石LiMn2O4的高温固相反应, 制备出改性的尖晶石锂锰氧化物材料.对材料进行了XRD和SEM分析及电性能等测试. 结果表明: 改性材料均基本保持了尖晶石主体结构;材料表面形貌与铝盐阴离子根极性强弱有关, 改性前的LiMn2O4在50 ℃下10次循环后, 容量衰减率为24.4%,而由铝盐酸性后材料的在8.3%～16%, 其中草酸铝对材料高温循环性能改善最为明显.The lithium manganese oxides modified by different aluminum composites were prepared by high-temperature solid-state reaction. The properties of the modified materials were investigated by X-ray diffraction analysis, SEM and electrochemical tests. The XRD analysis indicate that all the modified products possess a cubic spinel structure with a space group Fdm. The morphology of modified materials is related to anions of the aluminum salts. The capacity loss of LiMn_2O_4 before modification after ten cycles a...

关 键 词：LIMN2O4 锂离子电池 高温固相反应 

分 类 号：TM911[电气工程—电力电子与电力传动]