Electrochemical Characterization of Electronically Conductive Polypyrrole on Cyclic Voltammograms

Abstract

Experimental nd theoretical cyclic voltammograms forelectronically conducting polypyrrole film are obtained from the identical conditions and compared to each other to characterize electrochemical behavior of the polymer. A compari-son of the simulated and experimental cyclic voltammograms shows quantitative agreement. The profiles of the depend-ent variables how that the switching process is governed by the availability of the counterion to the polypyrrole lectrode and the amount of electroactive sites. Sensitivity analysis hows that the double layer effects have more influence in the cyclic voltammograms than the electrokinetic effects. Electronically conductive polypyrroles are an extremely interesting class of materials that have gained popularity in the last decade. It has been accepted that the polypyr-role films have a number of potential technological ppli-cations in the areas of energy storage (1-5), solar energy conversion (6-11), and electrochromic display devices (12-15). There is no doubt hat polypyrrole is an interesting electrode material. However, the knowledge of electro-