以Li2CO3、FeC2O4·2H2O、MnCO3和NH4H2PO4为原料,按5∶6∶4∶10的摩尔比混合,采用固相反应和水热法结合的新方法制备得到LiMn0.4Fe0.6PO4.通过XRD、SEM、TEM以及循环伏安(CV)和充放电测试对材料进行结构、形貌以及电化学性能表征.结果表明,此方法合成的产物具有单一的橄榄石晶体结构,颗粒尺寸约为120 nm,且表面均匀包覆一层无定形碳.电化学测试结果表明,样品的循环伏安曲线中有两对氧化还原峰,分别对应Fe3+/Fe2+(3.5 V)和Mn3+/Mn2+(4.0 V).LiMn0.4Fe0.6PO4/C在0.1C下的初始放电比容量为160 mAh/g,0.5C下的初始放电比容量为143 mAh/g,且具有较好的循环性能.
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