Electrochemical impedance spectra were measured at various electrode potentials, and the chemical diffusivity of Li ions in oxide films was determined as a function of the Li content. Variations in the chemical diffusivity were explained in terms of electrostatic interactions between intercalated Li ions, and a change in electronic conductivity with changing Li content.

S.I.Pyun, J.S.Bae: Journal of Alloys and Compounds, 1996, 245[1-2], L1-4