Royal Society of Chemistry, RSC Advances, 11(6), p. 9007-9012
DOI: 10.1039/c5ra22408j
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We report a liquid-solid-solution assemble strategy to fabricate Fe2O3@graphene (Fe2O3@rGO) composites at the oil/water interface, where the Fe2O3 nanoplates with thickness of about 100 nm are anchored on the crumpled graphene sheets. The in situ nucleation and growth process can ensure intimate contact between Fe2O3 nanoplates and graphene sheets, while the oil shell on Fe2O3 can prevent the aggregation of the Fe2O3@rGO composite. The crumpled structure and the relatively thin Fe2O3 nanoplates can shorten the electron diffusion path and enhanced the utilization rate of the active material. When used as the anode material, the Fe2O3@rGO anode shows a high reversible capacity of 1160 mAh g-1 at 0.2 A g-1 after 100 cycles, as well as a high cycling stability (101.3% capacity retention after 300 cycles at 1 A g-1). Moreover, with ~156 s charging time (at a current density of 12.8 A g-1), the anode can deliver a significant capacity of 552 mAh g-1, indicating its promising application as a high-rate lithium ion battery anode.