锂离子电池正极材料 LiFe（MoO4）2的制备及其电化学性质

摘要

采用固相法合成纯相的 LiFe(MoO 4)2材料.利用 X 射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和超导量子干涉仪(SQUID)对其晶体结构及其磁学性质进行研究,并采用恒流充放电测试研究该材料在3.0~1.0 V 内的电化学性质.电化学测试表明,LiFe(MoO 4)2作为正极材料具有良好的循环性能,稳定比容量为200 mA·h/g,充放电效率为98.5%.%LiFe (MoO 4 )2 was synthesized by solid state reaction and its structural and magnetic property were investigated by X-ray diffraction (XRD ), scanning electron microscopy (SEM), transmission electron microscopy (TEM ) and superconducting quantum interference device (SQUID).Furthermore,its electrochemical properties were tested between 3.0 V and 1.0 V.The electrochemical tests show that,as a positive electrode material,LiFe(MoO 4 )2 demonstrates good cycle performance with a reversible capacity of 200 mA·h/g and high coulombic efficiency of 98.5%, respectively.