A facile method to synthesize Fe3O4/graphene composites in normal pressure with high rate capacity and cycling stability

Fe3O4/graphene composites were prepared by a facile one-step with hydrazine as reducer at 100 °C in a beaker, where the reduction process of graphite oxide sheets into graphene was accompanied by generation of Fe3O4 nanoparticles. It is easy to achieve scale production of FGC. SEM and TEM have shown that the Fe3O4 nanoparticles with a diameter of about 40 nm were embedded on graphene nanosheets. The cycling stability and rate capacity performance of obtained Fe3O4/graphene are drastically enhanced in comparison with that of the bare Fe3O4 nanoparticles. At 928 mA g−1 current density, after 50 cycles, its charge capacity still remained 504.4 mAh g−1.

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► Fe3O4/graphene composites were prepared by a facile one-step at 100° C in normal pressure in a beaker.
► It is easy to achieve scale production of FGC.
► The cycling stability and rate capacity performance are drastically enhanced in comparison with that of the bare Fe3O4 nanoparticles.