▎ 摘　　要

The fast capacity fading at high current density turns out to be one of the key challenges limiting the broad applications of transition metal oxide-based electrodes. Herein, Fe2O3 nanoparticles with well-defined mesopores wrapped by reduced graphene oxide (RGO) have been synthesized via a facile hydrothermal strategy. The as-prepared nanocomposites were systematically characterized. XPS and Raman analyses confirm the co-existence of Fe2O3 and RGO in the nanocomposite system. SEM and TEM reveal that the mesoporous Fe2O3 nanoparticles have a size of 20-60 nm and are uniformly dispersed and tightly wrapped by RGO. When used as the anode in lithium ion batteries, the mesoporous-Fe2O3/RGO electrode exhibits excellent cycling stability (1098 mA h g(-1) after 500 cycles at 1 A g(-1)) and superior rate capability (574 mA h g(-1) at 5 A g(-1)). The excellent electrochemical performance can be mainly ascribed to the unique mesoscopic architecture that serves as a cushion to alleviate volume change of Fe2O3 during discharge/charge cycles, provides a sustainably large contact area with the electrolyte, and improves electrical conductivity. This unique nanocomposite electrode holds great potential as an anode material for advanced lithium ion batteries.