ELECTROCHEMICAL CHARACTERISTICS OF POLYANILINE SYNTHESIZED BY VARIOUSMETHODS

The influence of polymerization conditions on the electrochemical prop erties and morphology of polyaniline are studied. It is found that the charge/discharge performance of chemically synthesized polyaniline is greatly influenced by the oxidizing reagents used for the polymerizat ion, Cu(BF4)(2) and Fe(ClO4)(3) are particularly suitable reagents. Pr otons in the reaction media exert a strong influence on the morphology and electrochemical properties of polyaniline in both chemical and el ectrochemical polymerization processes, A novel process for chemically synthesizing polyaniline is developed to obtain polyaniline with supe rior electrochemical properties. In this process, polyaniline/HBF4 sal t is oxidized with Cu(BF4)(2)/acetonitrile and produces fibrous polyan iline with good doping/undoping reversibility.