▎ 摘　　要

alpha-Fe2O3/reduced graphene oxide (RGO) nanocomposites were synthesized by a rapid and simple microwave method. Fe(OH)(3) sol was used as the precursor of alpha-Fe2O3. Upon microwave heating, graphene oxide (GO) was reduced to RGO using hydrazine hydrate as a reductant and Fe(OH)(3) sol transformed into alpha-Fe2O3 particles attached uniformly onto RGO surfaces at the same time. The structure, morphology and composition of alpha-Fe2O3/RGO nanocomposites were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis and Raman spectroscopy. Electrochemical characteristics were evaluated by coin-type cells versus metallic lithium and cyclic voltammetry. The prepared alpha-Fe2O3/RGO nanocomposites exhibited a high reversible specific capacity of 650 mA h g(-1) after 50 cycles at a current density of 1.0 A g(-1), showing more superior rate capability than both alpha-Fe2O3 nanoparticles and RGO sheets. At the larger current density of 10.0 A g(-1), the capacity of alpha-Fe2O3/RGO nanocomposites still remained 400 mA h g(-1). The significant improvements in the electrochemical properties of alpha-Fe2O3/RGO nanocomposites could be attributed to the uniform alpha-Fe2O3 nanoparticles (30-50 nm) on the RGO substrate, which provided high electrical conductivity, confined the position and buffered the volume changes of alpha-Fe2O3 nanoparticles.