Porous α-Fe2O3 nanoparticles encapsulated within reduced graphene oxide as superior anode for lithium-ion battery

A facile route for the controllable synthesis of porous alpha-Fe2O3 supported by three-dimensional reduced graphene oxide (rGO) is presented. The synergistic effect between alpha-Fe2O3 and rGO can increase the electrolyte infiltration and improve lithium ion diffusion as well. Moreover, the combination of rGO nanosheets can increase the available surface area to provide more active sites and prevent alpha-Fe2O3 nanoparticles from agglomeration during the cycling process to ensure its long-term cycle performance. Consequently, the alpha-Fe2O3/rGO nanocomposites exhibit higher reversible specific capacity (1418.2 mAh g(-1) at 0.1 A g(-1)), better rate capability (kept 804.5 mAh g(-1) at 5.0 A g(-1)) and cycling stability than the alpha-Fe2O3 nanoparticles. Owing to the superior electrochemical performance, the alpha-Fe2O3/rGO nanocomposites might have a great potential as anode for lithium-ion batteries.