【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%.更多还原

【Abstract】 Y2O3-coated Li1/3Ni1/3Co1/3MnO2 were prepared by citric acid assisted sol-gel process.The capacity fade of the cells with Y2O3-coated Li1/3Ni1/3Co1/3MnO2 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 Li1/3Ni1/3Co1/3MnO2 prepared by no citric acid assisted process as cathode material is 96.72%.Meanwhile,the capacity retention of the cells with uncoated Li1/3Ni1/3Co1/3MnO2 as cathode material is only 91.03%.更多还原