Solution aging effects on the poly(3-methylthiophene) electrochemical properties

The effect of multiple polymerizations of poly(3-methylthiophene) using the same solution on its electrochemical properties was systematically investigated. After each polymer preparation, using always 475 mCcm−2 of formation charge, the electrochemical behavior of the films was investigated with cyclic voltammetry. It was observed a decrease in the current density during the polymer growth, in the current density peak and a displacement of the anodic peak potencials to more positive values of the voltammetric curves. These effects could be associated with a variation in the nucleation process which modify the polymer properties as the preparation solutions are used several times.