LiFePO4 thin films were prepared by radio frequency magnetron sputtering and

were characterized by X-ray diffraction, scanning electron microscopy and atomic

force microscope. Li-ion chemical diffusion coefficients, DLi, were measured by

potentiostatic intermittent titration technique, electrochemical impedance

spectroscopy, and cyclic voltammetry. The effects of Ag content, film thickness,

and film orientation on the electrochemical performance and Li-ion chemical

diffusion coefficients of the LiFePO4 thin films were investigated. The DLi values were measured using the liquid electrolyte and the solid electrolyte, and the

obtained values were discussed. The DLi values by potentiostatic intermittent

titration technique and electrochemical impedance spectroscopy were in the range

of 10−14 to 10−12 and 10−15 to 10−12cm2/s, respectively and that by cyclic

voltammetry was of the order of 10−14cm2/s.

Li-Ion Diffusion Kinetics in LiFePO4 Thin Film Prepared by Radio Frequency

Magnetron Sputtering. J.Xie, N.Imanishi, T.Zhang, A.Hirano, Y.Takeda,

O.Yamamoto: Electrochimica Acta, 2009, 54[20], 4631-7