Abstract: This paper reports the diffusion coefficients of various dopant counter-anions into electro synthesised polypyrrole films, the cyclic voltammetry behaviour of the doped polymers and the effects of the electrolyte on the morphology of the polymer. The diffusion properties of electrochemically-prepared poly (N-dodecylpyrrole) and polypyrrole films were investigated in electrochemical cells containinglithium perchlorate, tetra methyl ammonium chloride and sodium dodecyl benzene sulfonate, and the effects of the size of the ions on their diffusion coefficients are discussed.

Keywords: Polypyrrole, Cyclic Voltammetry, Dopant Diffusion.