0.5Li_2MnO_3-0.5LiMn_(1/3)Ni_(1/3)Co_(1/3)O_2正极材料的制备与性能  

Synthesis and performance of 0.5Li_2MnO_3-0.5LiMn_(1/3)Ni_(1/3)Co_(1/3)O_2 cathode material

作　　者：王力臻[1,2] 席菲[1] 谷书华[1] 高海丽[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002 [2]河南省表界面重点实验室,河南郑州450002

出　　处：《电池》2014年第4期206-209,共4页Battery Bimonthly

基　　金：河南省基础与前沿技术研究重点项目(112300413216)

摘　　要：采用球磨流变相辅助高温固相反应法制备0.5Li2MnO3-0.5LiMn1/3Ni1/3Co1/3O2材料,利用恒流充放电、循环伏安、SEM和X射线能谱（EDS）等技术对产物进行分析。材料属于R-3m空间群的α-NaFeO2型层状结构,颗粒结晶完整,95%的颗粒粒径在18.39μm以内。在4.8-2.0 V充放电,材料的0.05 C首次放电比容量为250.9 mAh/g,库仑效率为70.1%,并在首次充电过程中完成结构重整;0.20 C首次放电比容量为214.4 mAh/g,2.00 C放电比容量为136.2 mAh/g。0.5Li2MnO3-0.5LiMn1/3Ni1/3Co1/3O2 material was synthesized by ball-milling rheological phase assisted with high temperature solid-state method. The product was analyzed via galvanostatic charge-discharge, cyclic voltammetry （ CV ）, SEM and energy dispersive spectroscopy（EDS） techniques. The material belonged to α-NaFeO2 type layered structure with R-3m space group, the particles possessed complete crystallization, the diameter of 95% of the particle was smaller than 18.39 μm. When charged- discharged in 4. 8 - 2. 0 V, the 0. 05 C initial specific discharge capacity of the material was 250. 9 mAh/g, the coulombic efficiency was 70. 1% ,the structural realignment completed in the initial charge process, the 0. 20 C initial specific discharge capacity was 214.4 mAh/g,the 2. 00 C specific discharge capacity was 136. 2 mAh/g.

关 键 词：0 5Li2MnO3-0 5LiMn1 3Ni1 3Co1 3O2 流变相 倍率性能 循环性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]