The diffusion coefficient of lithium ions in fullerene-coated silicon thin film electrodes, prepared by the plasma-assisted deposition technique, was estimated by a specific electrochemical measurement known as cyclic voltammetry and then compared with that of a bare silicon film used as the anode in lithium ion batteries. Based upon the present experimental range, the diffusion coefficient of the fullerene-coated Si thin film was found to be ~10−9cm2/; two orders of magnitude higher than that of the bare Si thin film (~1011cm2/s). It was concluded that the fullerene film acted as an artificial solid electrolyte interphase layer during charging–discharging tests.

A Study of Li-Ion Diffusion Kinetics in the Fullerene-Coated Si Anodes of Lithium Ion Batteries. A.A.Arie, J.K.Lee: Physica Scripta, 2010, T139, 014013