LiFePO_4正极材料的熔盐-碳热还原法合成  

Synthesis of LiFePO_4 cathode materials by molten salt-carbothermal reduction method

作　　者：郅晓科[1] 叶学海[1] 何爱珍[1] 王旭阳[1] 章甦[1] 

机构地区：[1]中海油天津化工研究设计院,天津300131

出　　处：《电源技术》2013年第7期1123-1125,共3页Chinese Journal of Power Sources

摘　　要：采用熔盐-碳热还原法制备了LiFePO4正极材料。采用X射线衍射(XRD)、扫描电镜(SEM)、交流阻抗(EIS)和充放电测试对粉末样品进行了表征。结果表明,合成材料具有完整的橄榄石结构,颗粒粒径约1μm且粒度分布均匀,材料0.2 C首次放电比容量为156.4 mAh/g,1 C首次放电比容量为141.2 mAh/g,循环50次后1 C比容量增至141.7mAh/g,表现出优异的电化学性能。The LiFePO4 cathode materials was synthesized by molten salt-carbothermal reduction method.The prepared powders were characterized by X ray diffraction（XRD）,scanning electron microscopy（SEM）,electrochemical impedance spectroscopy（EIS） and charge-discharge tests.The results show that the prepared samples have ordered olivine structure and fine particles with an average particle size about 1 μm.The initial discharge specific capacity of LiFePO4is 156.4 mAh/g at 0.2 C rate,141.2 mAh/g is obtained at 1 C rate and the specific capacity rises to 141.7 mAh/g after 50 cycles.

关 键 词：正极材料 LIFEPO4 熔盐-碳热还原法 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]