Fe2O3 electrode materials with two-dimensional flake morphology were prepared by a facile su-crose-assisted one-step sintering method from Fe(OH)3 colloid. The effect of sintering temperature on the microstructure and lithium storage performance of Fe2O3 electrodes was investigated systematically. The results demonstrated that the sample sintered at 400 ℃ is the composites of α-Fe2O3/Fe3O4; while the samples sintered at higher temperatures (500 ℃, 600 ℃, and 700 ℃) are single phase α-Fe2O3. With the increase of sintering temperature, the tight connected irregular particles in the flake gradually get separated so that the two-dimensional flake structure tends to collapse. The results of electrochemical performance tests showed that the sample sintered at 500 ℃ has the best lithium storage performance. For example, a high specific discharge capacity of 628.6 mA·h/g can be retained after 450 cycles at a current density of 1 A/g, and a reversible capacity of 352.3 mA·h/g can be maintained even at 4 A/g. Ki-netic and the cycling stability analysis of electrode indicated that the sample sintered at 500 ℃ has the largest Li+ diffusion coefficient (the diffusion coefficient values corresponding to reduction peak and oxidation peak are 1.57×10-13 cm2/s and 4.60×10-13 cm2/s, respectively) and the best structural integrity stability among the studied samples.