锂电池正极材料CuCrO_4的合成及表征  

Synthesis and characterization of CuCrO_4 as cathode material of lithium battery

作　　者：李琳[1] 李益孝[1] 杨勇[1] 

机构地区：[1]厦门大学固体表面物理化学国家重点实验室化学化工学院化学系,福建厦门361005

出　　处：《电源技术》2010年第1期48-50,共3页Chinese Journal of Power Sources

基　　金：国家自然科学基金(29925310;20473060);"973"计划资助课题(2007CB209702)

摘　　要：采用沉淀方法制备了一次锂电池CuCrO4正极材料。电化学性能测试结果表明:该材料以10mA/g的电流密度放电到1.5V,比容量达到460mAh/g(相当于每个分子有三个电子的交换),放电电压平台约在2.5V。该材料表现的良好倍率性能可能与材料的亚微米级棒状形态和在放电过程中形成的金属铜有关。另外,采用非原位X射线衍射技术(XRD)和傅里叶反射红外光谱(FTIR)的方法对CuCrO4正极材料放电机理进行了探讨。CuCrO4 as cathode material of primary lithium batteries was prepared by precipitation method. The electrochemical performance test results show that the material delivers a discharge capacity as high as 460 mAh/g at a current density of 10 mA/g, corresponding to exchange of about three electrons per formula of the compound. This material shows an excellent rate capability, which is possibly related to its rod-like morphology, and formation of metal copper during the discharging process. In addition, the discharge mechanism of CuCrO4was investigated by ex-situ XRD and FTIR methods.

关 键 词：锂离子电池 铬酸铜 正极材料 放电机理 

分 类 号：TM912.9[电气工程—电力电子与电力传动]