Li diffusion in LiCoO_2 thin films prepared by pulsed laser deposition

摘要

Preferred c-axis oriented LiCoO_2 thin films were prepared on a Si substrate by pulsed laser deposition (PLD). The chemical diffusion coefficients, D_(li), of Li in these films were measured by electrochemical impedance spectroscopy (EIS) and potentiostatic intermittent titration technique (PITT). Du was found to be in the range of 10~(-11) to 10~(-13) cm~2 s~(-1) depending on Li concentration and on the characterization method used.