针对锂离子电池体系，以提高负极材料可逆充放电容量为目的，制备了Fe2 O3‐石墨烯纳米复合材料，并利用XRD、SEM 对其结构和形貌进行了表征分析，通过恒流充放电测试对其电化学性能进行系统研究。采用水热法成功制备了二元的 Fe2 O3‐石墨烯纳米复合材料，纳米Fe2 O3分布较为均匀，形貌多为菱形块状或类球状多面体，且与石墨烯片相互交叠，有效抑制了双方的团聚，形成了有利于储锂的堆砌结构。电化学性能测试表明，Fe2 O3‐石墨烯纳米复合材料的储锂性能大大优于石墨烯和纳米 Fe2 O3，30次循环后，可逆容量仍高达1252mAh／g，循环性能优异；随着石墨烯加入量的增大，Fe2 O3‐石墨烯纳米复合材料的可逆容量越高。%The graphene and Fe2 O3‐graphene nanocomposite were prepared to improve the reversible specific ca‐pacities of anode materials for lithium‐ion batteries .The XRD and SEM were adopted to characterize the micro‐structure and morphology of the as‐prepared materials .The electrochemical performance of as‐prepared compos‐ites was investigated by galvanostatic discharged and charged test in detail .Fe2 O3‐graphene nanocomposite was prepared by hydrothermal method to improve the lithium storage capacity .The results show that Fe2 O3 nanop‐articles were successfully deposited onto the surfaces of graphene sheets ,and Fe2 O3 nanoparticles which had a uniformly cubical or spherical morphology .Electrochemical tests show that Fe2 O3‐graphene nanocomposite pos‐sesses higher reversible capacity than graphene or Fe2 O3 nanoparticles due to formation of a microporous struc‐ture between graphene and Fe2 O3 nanoparticles for lithium storage .The reversible capacity of Fe2 O3‐graphene nanocomposite still was 1 252 mAh/g after 30 cycles .The more increase of grephene ,the higher reversible ca‐pacity of Fe2 O3‐graphene nanocomposite was obtained .In addition ,Fe2 O3‐graphene nanocomposite has an ex‐cellent cycle performance and rate performance under high current density .
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