Electrochemical quartz crystal microbalance study of ion transport accompanying charging-discharging of poly(pyrrole) films

Electrochemical quartz crystal microbalance studies on poly(pyrrole) electr odes revealed a complex nature of the potential-dependent sorption of ionic substances. It is found that the relative contribution of anions and catio ns to the overall charge transport process depends upon several factors! su ch as the oxidation state of the polymer, the composition of the supporting electrolyte as well as on the film thickness. The phenomena observed are d iscussed in terms of morphological transformations arising as a result of i nteractions between the polymer and the mobile substances.