Effect of the potential on the electrochemically induced ageing of polyaniline films

► The ageing process of Pani depends on the ageing potential. ► This dependence is measured by the changes of the voltammetric peak current. ► As the ageing potential increases the amount of reduced polymer decreases. ► The rate of ageing decreases as the ageing potential increases. ► The movements of reduced polymer units are inhibited by units of oxidized polymer.