Electrochemical incorporation of poly(pyrrole) into Nafion and comparison of the electrochemical properties of Nafion-poly(pyrrole) and poly(pyrrole) films

Electrochemical incorporation of poly(pyrrole) (PP) into Nafion polymer film is described. Electrochemical properties of Nafion-PP composite and PP films are compared. The D/L/sup 2/ values of Nafion-PP composite and PP films are 3.96 and 4.91 s/sup -1/, respectively, where D is the diffusion coefficient of the mobile species inside the polymer film and L is the wet thickness of the polymer. While the electrochemical properties of PP depend upon the type of anion, that of Nafion-PP are apparently influenced by the cation type, which suggests that although anion incorporation during PP inclusion into Nafion is likely, the predominant dopant is the Na/sup +/-excluded Nafion polymer itself. The chronocoulometric behavior of Nafion-PP composite is similar for TBAP and TBABF/sub 4/ supporting electrolytes but differs, however, significantly from that for TEApTS.