Lithium ion diffusion processes in pulsed laser-deposited TiO2 film electrodes were investigated by electrochemical and isothermal transient ionic current (ITIC) methods. Cyclic voltammogram and potential step measurements were used to examine the processes of insertion of Li ions into the TiO2 electrode. Two diffusion processes of Li ion, driven by the concentration gradient and by an applied field, were demonstrated by ITIC analysis. The diffusion constants were dependent on the measuring method and the diffusion mechanism. These results clarify the diffusion behavior of Li ion in anatase TiO2 film and prove that pulsed laser deposition was a promising method for producing TiO2 film electrodes.

Lithium Ion Diffusion Behavior in Laser-Deposited TiO2 Films. Fu, Z.W., Qin, Q.Z.: Journal of Physical Chemistry B, 2000, 104[23], 5505-10