Electrochemical polymerization of pyrrole in electrolyte‐free aqueous suspension of resulted in polypyrrole films containing ca. 83 weight percent of the oxide. The reduction of the resulting polypyrrole films caused the insertion of electrolyte cations into the films, indicating that the incorporated worked as a fixed charge compensator for the oxidized polypyrrole. The amount of the incorporated was diminished by adding to the deposition bath, the degree being dependent on the concentration of relative to that of the suspended . The electrochromic properties of the polypyrrole were investigated as a function of the amount incorporated to achieve dual electrochromism due to polypyrrole and the incorporated .