【作者】 蔡振平； 李文忠； 张向军； 卢世刚；

【Author】 CAI Zhen-ping, LI Wen-zhong, ZHANG Xiang-jun, LU Shi-gang (General Research Institute of Nonferrous Metasl,Beijing 100088,China)

【机构】 北京有色金属研究总院；

【摘要】 通过对原料进行造粒的预处理方式固相反应合成了高密度的LiFePO4/C锂离子电池正极材料。采用XRD、SEM等对合成样品进行了表征并测试了其电化学性能。结果表明,造粒处理对材料的形貌和振实密度有很大影响。经过造粒处理后700℃煅烧15h合成的LiFePO4/C复合材料的振实密度达1.446g/cm3;在0.1、0.5、1C充放电倍率下,首次放电比容量分别为146、131、128mAh/g。更多还原

【Abstract】 High-density LiFePO4/C as cathode materials for ion battery was synthesized via solid state reaction. The crystal structure, morphology and electrochemical properties were investigated by XRD,SEM and electrochemical tests. Results showed that the tapped density of the LiFePO4/C composite materials could reached 1.446g/cm3. LiFePO4/C synthesized at 700℃ for 15h exhibited the best performance. The initial specific discharge capacity were 146,131 and 128mAh/g at 0.1,0.5 and 1C, respectively.更多还原