温度对LiMn_2O_4正极材料嵌锂动力学的影响  

Effect of temperature on kinetics of lithium ion insertion for Li-ion battery positive electrode material

作　　者：朱彦荣[1] 夏继才 伊廷锋[1] 岳彩波[1] 诸荣孙[1] 贾志刚[1] 

机构地区：[1]安徽工业大学化学与化工学院,安徽马鞍山243002 [2]广州天赐高新材料股份有限公司,广东广州510600

出　　处：《电池工业》2010年第4期202-204,共3页Chinese Battery Industry

基　　金：国家自然科学基金(50902001);安徽高校省级优秀青年人才基金重点项目(2010SQRL033ZD)

摘　　要：采用传统方法成功制备了LiMn2O4正极材料,并利用微分电容和电化学阻抗谱研究了储存温度对LiMn2O4正极材料锂离子嵌脱动力学的影响。微分电容曲线表明LiMn2O4中锂离子的两步嵌脱机制是完全不同的。电化学阻抗谱表明,随着储存温度的升高,Li+在电极活性物质中的扩散变得困难,从而导致电荷转移电阻迅速增大。LiMn2O4 positive electrode material was successfully synthesized by conventional method,and the effect of storage temperatures on kinetics of lithium ion insertion for LiMn2O4 positive electrode material was investigated by differential capacitance and electrochemical impedance spectroscopy（EIS）.The differential capacitance curve showed that the two-stage mechanism of the lithium insertion-extraction in LiMn2O4 was completely different.EIS indicated that the diffusion of Li^＋ in the active material became difficult with increasing of storage temperatures,therefore resulting in a rapid increase of charge transfer resistance.

关 键 词：锂离子电池 正极材料 动力学 LIMN2O4 

分 类 号：TM912.9[电气工程—电力电子与电力传动]