▎ 摘 要
Nanocomposite of graphene/alpha-Fe2O3 (G/alpha-Fe2O3) nanospindles was synthesized by a simple hydrothermal assembly method followed by thermal treatment. The alpha-Fe2O3 nanospindles were evenly enwrapped by the graphene nanosheets. When evaluated as an anode for Li-ion batteries (LIBs), the G/alpha-Fe2O3 nanocomposite showed enhanced cycling performance and rate capability compared to pure alpha-Fe2O3. G/alpha-Fe2O3 retained a reversible capacity of 607 mAh g(-1) after 100 cycles at 100 mA g(-1), which is far higher than that (160 mAh g(-1)) of alpha-Fe(2)O(3)3. The superior electrochemical performance of G/alpha-Fe2O3 can be attributed to the protection effect of graphene nanosheets to accommodate the volume change of alpha-Fe2O3 during lithiation/delithiation.