Transparent Fe2O3(1 - x)-TiO2(x) (x = 0, 0.3, 0.5, 0.6, 0.7, 0.8, and 0.9 in molar fraction) thin films on indium-tin oxide (ITO)/glass substrates were made by sol-gel dip-coating. The iron-ion-containing sols were prepared from Fe(NO3)(3) . 9H(2)O and Ti(OC4H9)(4) precursors. The electrochemical investigation of the Li+ ion storage process in Fe2O3-TiO2 films has been made in a Pt/LiClO4-PC(1 M)/Fe2O3-TiO2/ITO cell between -1.5 and 1.0 V potential range vs. saturated calomel electrode (SCE). The total electric charge inserted and extracted during a cycle has been determined by the cyclic voltammetry. The electric charge transition ability is mainly influenced by the composition and thickness of films, heat-treatment temperature, and the precursor concentration of sols. In a pure iron oxide system, amorphous Fe2O3 exhibited better Li+ ion storage behavior than alpha-Fe2O3 phase. In the Fe2O3-TiO2 composite systems, Fe2O3(0.3)-TiO2(0.7) films showed the best reversibility of the insertion-deinsertion process while their maximal Q/d value is about 0.12 mC cm(2) nm(1).