capacitance properties of electrochemically synthesised poly-bithiophenegraphene exfoliated composite films

The graphene (gr) has attracted intensive interest due to its two-dimensional and unique physical properties. in the present study, the graphene sheets were synthesized by electrochemical exfoliation of graphite in sulfuric acid solution. the polybithiophene-graphene (pbth-gr) composite films deposited onto indium tin oxide substrate (ito/pbth-gr) have been prepared by the incorporation of graphene sheets into the pbth matrix during electropolymerization under magnetic stirring from the liclo4/ch3cn electrolyte containing the bithiophene (bth) monomer and graphene sheets. the incorporation of graphene sheets at different masses (1, 2 and 3 mg) is ensured by the effect of the stirring of the electrolyte. the characterisation of films is effected by electrochemical methods (cyclic voltammetry and impedance spectroscopy), spectroscopic technics (ft-ir, uv-visible), x ray diffraction, thermogravimetric analysis, and scanning electron microscopy. it was observed that the electrochemical performance measurements of the ito/pbth-gr (3 mg) film show a specific capacity of around 65 f/g, which is six times higher than that of ito/pbth films, 11 f/g.