Lithium intercalation to titanium dioxide films from propylene carbonate solutions

The lithium intercalation from the LiClO4 propylene carbonate solution into the thin TiO2 (rutile) films, obtained through the titanium substrate thermal oxidation, is studied by the methods of the cyclic voltamperometry and impedometry within the wide frequency range (10-2-105 Hz). The electrochemical characteristics of the film electrodes, reversibility of the intercalation - deintercalation process, the surface passivation effect on the lithium transfer velocity. The electrical, kinetic and diffusion parameters dependence on the electrode potential (composition) are discussed. The lithium diffusion coefficient order in the LixTeO2, evaluated through the impedance method, constituted 10-12 cm2/s