LiNi_(1-x-y)Co_xMn_yO_2正极材料的制备与电化学性能  

Preparation and electrochemical performances of ternary LiNi_(1-x-y)Co_xMn_yO_2 cathode material

作　　者：朱余银[1] 李晶[2] Zhu Yuyin;Li Jing(School of Environment and Resources,Southwest University of Science and Technology,Mianyang 621010,China;School of Material Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《强激光与粒子束》2019年第5期117-124,共8页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目(2013AA0509);西南科技大学博士基金项目(18zx712201);西南科技大学学科建设软科学研究项目(18sxb08501)

摘　　要：LiNi_(1-x-y)Co_xMn_yO_2正极材料作为最有商业化前途的锂离子电池正极材料,近年来成为研究者关注的焦点。但目前针对该材料合成工艺的研究还较少。对LiNi_(0.8)Co_(0.15)Mn_(0.05)O_2开展了不同的烧结工艺研究,并对制备出的正极材料进行了表征和性能测试。研究发现在0.1C (电池容量额定值)倍率下充放电比容量为200mA·h·g^(-1)左右,在1C倍率循环100次下,480℃@3h+780℃@5h和500℃@5h+780℃@10h两种烧结工艺下容量保持率分别为94%和86%,说明用这两种工艺制备的正极材料的综合性能最优。As the most promising commercial lithium-ion battery,the LiNi1-x-yCoxMnyO2 cathode have become the focus of researchers in recent years.However,there are less researches on the synthetic process of this material.This paper discusses various sintering processes of LiNi0.8Co0.15Mn0.05O2,and the characterization and electrochemical performances testing of the prepared cathode materials.The research shows that the material has higher specific capacity (about 200 mA·h·g^-1 ) at 0.1C ( C is battery capacity rating value) charging-discharging rate.At 1C and 100 times of charging-discharging,the capacity retention ratios of 480℃@3h + 780℃@5 h and 500 ℃@5h + 780 ℃@10 h sintering processes are 94% and 86%,respectively,which illustrates the synthetical properties of the cathode materials prepared by these two processes are optimal.

关 键 词：三元正极材料 烧结工艺 电化学性能 锂离子电池 

分 类 号：TQ152[化学工程—电化学工业]