柠檬酸协助的Y_2O_3包覆LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2材料性能研究  

SYNTHESIS AND ELECTROCHEMICAL PERFORMANCE OF CITRIC ACID ASSISTED Y_2O_3 COATED LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2

作　　者：刘浩涵[1] 张建[1] 张熙贵[1] 谢晓华[1] 李佳[1] 夏保佳[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所纳米技术研究室,上海200050

出　　处：《华南师范大学学报（自然科学版）》2009年第A02期52-53,共2页Journal of South China Normal University(Natural Science Edition)

基　　金：中国科学院创新基金资助项目(CXJJ-09-M41);国家自然科学基金资助项目(20773157);上海市科学技术委员会资助项目(08ZR1422500)

摘　　要：采用溶胶凝胶法,以硝酸钇和柠檬酸为原料对LiNi1/3Co1/3Mn1/3O2进行包覆.室温下,在2.8～4.3 V和1 C充放电条件下,以柠檬酸协助的Y2O3包覆LiNi1/3Co1/3Mn1/3O2材料作为正极,锂片作为负极,制成的电池50次循环容量没有衰减,而未加柠檬酸的Y2O3包覆LiNi1/3Co1/3Mn1/3O2材料50次循环容量保持率为96.72%,未经过包覆的材料只有91.03%.Y2O3 -coated LiNi1/3Co1/3Mn1/3O2 were prepared by citric acid assisted sol- gel process. The capacity fade of the cells with Y2O3 -coated Li1/3Ni1/3 Co1/3 MnO2 prepared by citric acid assisted sol -gel process as cathode material is neglectable after 50 cycles（2.8 -4.3 V, 1 C）. The capacity retention of the cells with Y2O3 -coated Li1/3Ni1/3 Co1/3 MnO2 prepared by no citric acid assisted process as cathode material is 96.72%. Meanwhile, the capacity retention of the cells with uncoated Li1/3 Ni1/3Co1/3 MnO2 as cathode material is only 91.03%.

关 键 词：柠檬酸 正极材料 Y2O3 LINI1/3CO1/3MN1/3O2 容量保持率 

分 类 号：TM912.9[电气工程—电力电子与电力传动]