具有良好高温循环性能的Li(Li_(0.15)Ni_(0.21)Fe_(0.21)Mn_(0.45))O_2阴极材料的合成与性能表征  

Synthesis and Performance Characterization of Li(Li_(0.15)Ni_(0.21)Fe_(0.21)Mn_(0.45))O_2 Cathode Material with Good High Temperature Cyclibility

作　　者：郑曦[1] 曹林[1] 朱文涛[1] 邱新平[1] 

机构地区：[1]清华大学化学系有机光电子与分子工程实验室

出　　处：《化学学报》2007年第7期571-574,共4页Acta Chimica Sinica

基　　金：国家973计划(No.2002CB211800)资助项目.

摘　　要：利用高温固相法制备了具有层状结构的Li(Li0.15Ni0.21Fe0.21Mn0.45)O2阴极材料,通过ICP-AES测定了各金属含量,XRD研究表明该材料在充放电过程中发生了结构变化.进一步的电化学表征说明材料在结构转变后具有突出的高温循环性能(55℃),以300mA/g(2C)的电流密度循环428周后,仍然能够保持80%的初始放电容量.Layered cathode material Li（Li0.15Ni0.21Fe0.021Mn0.45）O2 was synthesized by a solid-state reaction with high temperature. ICP-AES was used to determine the exact content of every metal. The structure change was found during the charge-discharge processes via XRD. The good cyclibility at 55 ℃ was confirmed by electrochemical characteristics. It is particular that 80% of the initial capacity was kept after 428 cycle charge and discharge under a current density of 300 mA/g （2C）.

关 键 词：高温 阴极材料 锂离子电池 层状结构 循环性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动]