STUDY OF THE REDOX PROPERTY OF POLYPYRROLE FILM DOPED WITH HEXAFLUOROTITANATE ANION TiF62-

Abstract

Polypyrrole (PPy) has been paid much more attention in the recent years due to their special properties such as high conductivity, stability, being easy to synthesis. Many dopants have been used for improving the properties of PPy. Anion hexafluorotitanate TiF62- has not been paid much attention as a dopant of PPy film to improve its protective ability. During redox process the resistance and capacitance of polymer film will be changed due to the incorporation/release of anions and cations to/from the polymer film. Cyclicvoltammetry and Electrochemical Impedance Spectroscopy were used to study the redox process of PPy film in a large and a small cation solution, 0.1 M tetrabutylammoniumbromide (C4H9)4NBr and 0.1M NaCl, respectively. The results showed that anion TiF62- could be released from the polymer film during the reduction. The capacitance and resistance of PPy film were changed a little bit during reduction. The redox property of the film has not been affected so much with cation and anion of solution.