Li[Ni1/3Co1/3Mn1/3]O2正极材料的合成及其性能表征  

Synthesis and Performance Characterization of Li[Ni1/3Co1/3Mn1/3]O2 Cathode Material

作　　者：武玉玲[1,2] 李武[1] 贾永忠[1] 

机构地区：[1]中国科学院青海盐湖研究所,西宁810008 [2]中国科学院研究生院,北京100039

出　　处：《材料导报（网络版）》2006年第1期46-49,共4页Materials Review

摘　　要：采用共沉淀法合成Ni1/3Co1/3Mn1/3（OH）2前驱体，再以该前驱体和Li2CO3为原料制备了锂离子电池正极材料摘要Li[Ni1/3Co1/3Mn1/3]O2。通过XRD、SEM和电化学性能测试对材料的结构、形貌及电化学性能进行了表征。结果表明，合成的Li[Ni1/3Co1/3Mn1/3]O2样品的层状结构明显，且样品颗粒粒径分布均匀。Li[Ni1/3Co1/3Mn1/3]O2样品的首次放电容量达到144mAh·g^–1，循环50次的平均容量衰减为0.65%/次，表形出良好的电化学循环性能。In attempt to prepare layered Li[Ni1/3Co1/3Mn1/3]O2, hydroxide co-precipitation method was employed. The physical properties of the synthesized cathode materials are discussed on the basis of structural analysis. From X-ray diffraction（XRD）and scanning electron microscopic （SEM） studies, it is found that Li[Ni1/3Co1/3Mn1/3]O2 were crystallized to layered α–NaFeO2 structure, and the particle size distribution is uniform. The electrochemical properties of these materials such as the charge and dis-charge performance and cyclic voltammetry are systematically measured. The first discharge capacity of Li[Ni1/3Co1/3Mn1/3]O2 is as high as 144 mAh？g–1, and the average capacity loss was only 0.65% per cycle within 50 cycles in the voltage range of 3.0～4.4V. It indicates that the electrochemical cycle properties are well.

关 键 词：锂离子电池 正极材料 Li[Ni1/3Co1/3Mn1/3]O2 共沉淀法 

分 类 号：TB332[一般工业技术—材料科学与工程]