Preparation of Boron Doped Fullerene Film by a Thermal Evaporation Technique using Argon Plasma Treatment and Its Electrochemical Application

Boron doped fullerene $C₆₀$ ($B:C₆₀$) films were prepared by the thermal evaporation of $C₆₀$ powder using argon plasma treatment. The morphology and structural characteristics of the thin films were investigated by scanning electron microscope (SEM), Fourier transform infra-red spectroscopy (FTIR) and x-ray photo electron spectroscopy (XPS). The electrochemical application of the boron doped fullerene film as a coating layer for silicon anodes in lithium ion batteries was also investigated. Cyclic voltammetry (CV) measurements were applied to the $B:C₆₀$ coated silicon electrodes at a scan rate of $0.05\;mVs^-1$. The CV results show that the $B:C₆₀$ coating layer act as a passivation layer with respect to the insertion and extraction of lithium ions into the silicon film electrode.