In order to improve the properties of vanadium oxide as cathodes, Fe(x)V2O5(x=0.002, 0.02, 0.05) xerogel was synthesized by adding small amount of Fe to V2O5 sol that was derived via a sol-gel process. Coating processes, such as a spin coating and a dip coating, and a heat treatment technique were employed to investigate the effectiveness of each technique by testing the cell performance using the Fe(x)V2O5 as the cathode. The results showed that the spin coated Fe(x)V2O5 xerogel had a higher capacity and a better reversibility than both the dip coated Fe(x)V2O5 xerogel and the heat treated Fe(x)V2O5 at 400 ℃. The capacity of sp-Fe0.05V2O5 xerogel was greatly enganced by more than 370 mAh/g. In general, as the thickness of the Fe(x)V2O5 xerogel was decreased and the added amount of doped Fe in the V2O5 increased, the electrochemical properties such as the reversibility and cell capacity were enhanced.