锂离子电池正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2的制备及研究  

Preparation and Property of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 as Cathode Material for Lithium Ion Batteries

作　　者：刘俊杰[1] 冯永来 吴雄伟[1] LIU Jun-jie;FENG Yong-lai;WU Xiong-wei(College of Science,Hunan Agricultural University,Changsha 410128,China)

机构地区：[1]湖南农业大学理学院,湖南长沙410128

出　　处：《广州化学》2018年第6期36-40,共5页Guangzhou Chemistry

摘　　要：采用水热法合成了LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2作为锂离子电池的正极材料,采用X-射线衍射仪(XRD)、X-射线能谱仪(EDX)、扫描电子显微镜(SEM)对其进行了表征,通过循环伏安(CV)测试、阻抗测试(EIS)和充放电测试探究了其作为正极材料的电化学性能。结果表明:该材料表现出了良好的循环性能和倍率性能,在0.2C(1C=170 mA/g)的电流密度下,其容量为160 mAh/g以上,在0.5C下,首次放电容量为143 mAh/g以上,200个循环后容量仍然有121.5 mAh/g,容量保持率在84%以上。LiNi1/3Co1/3Mn1/3O2was synthesized by hydrothermal method as cathode of lithium ion battery,and itwas characterized by X-ray diffraction(XRD),X-ray spectroscopy(EDX)and scanning electron microscope(SEM).Electrochemical performances were tested by cyclic voltammetry(CV),impedance(EIS)and charge-dischargetests,which exhibited good cycle performances and rate performances.The cathode delivers discharge capacity ofabove160mAh/g at0.2C(1C=170mA/g),and initial discharge capacity of143mAh/g at0.5C respectively,remained121.5mAh/g after200cycles,capacity retention rate kept above84%.

关 键 词：正极材料 LINI1/3CO1/3MN1/3O2 锂离子电池 循环寿命 

分 类 号：O646.541[理学—物理化学]