锂离子电池正极材料Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2电极过程动力学研究  

Electrode Kinetic of Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2 Cathode Material for Lithium Ion Battery

作　　者：刘伶[1] 关昶[1] 张乃庆[2] 孙克宁[2] 

机构地区：[1]吉林化工学院化工与材料工程学院,吉林市132022 [2]哈尔滨工业大学科学研究院,哈尔滨150001

出　　处：《人工晶体学报》2012年第1期200-203,220,共5页Journal of Synthetic Crystals

摘　　要：采用共沉淀法制备锂离子电池正极材料Li(Ni1/3Co1/3Mn1/3)O2,通过循环伏安法和电化学交流阻抗分析,探讨了锂离子在LiNi1/3Co1/3Mn1/3O2中嵌入和脱出的机制。循环伏安测试结果表明,LiNi1/3Co1/3Mn1/3O2材料结构中不存在John-teller效应,从而抑制了电极材料和电解液之间的副反应。电化学交流阻抗测试结果表明,随着电压的升高Rct(电荷转移电阻)值逐渐减小,而随着循环次数的增加Rct值逐渐增大。The compound of Li（Ni1/3Co1/3Mn1/3）O2 was synthesized by co-precipitation method.Its electrode kinetic was investigated by cyclic voltammety（CV） and electrochemical impedance spectroscopy（EIS）.The results of CV showed that there was no John-teller effect and reaction between electrode material and electrolyte in the Li（Ni1/3Co1/3Mn1/3）O2.The results of EIS showed that the charge transfer resistance Rct was decreased when the voltage increased and increased when the cycling number increased.

关 键 词：锂离子电池 正极材料 LI(NI1/3CO1/3MN1/3)O2 电极过程动力学 

分 类 号：TM912.9[电气工程—电力电子与电力传动]