Supercapacitor Applications of Polyaniline and Poly(N-methylaniline) Coated Pencil Graphite Electrode

摘要

Polyaniline (PANi) and poly(N-methylaniline) (PNMA) films have been successfully synthesized onpencil graphite electrode (PGE) using cyclic voltammetry (CV) from acetonitrile (ACN) solution of0.1 M tetraethylammonium tetrafluoroborate (TEABF4) and 0.1 M monomer. These polymers havebeen characterized by scanning electron microscopy (SEM), CV and Mott-Schottky (MS) analysis.The electrochemical storage properties of PGE coated with PANi (PGE/PANi) and PNMA(PGE/PNMA) have been evaluated using CV, potentiostatic electrochemical impedance spectroscopy(EIS) and charge-discharge measurement. In addition, the voltage range has been determined. By thisway, it is suggested for which kind of technological devices supercapacitor can be used as a circuitelement. CV and potantiostatic EIS show that the specific capacitance of the PGE/PNMA is higherthan the PGE/PANi. On the other hand, according to charge-discharge tests, the PGE/PNMA has bettercharge-discharge stability than the PGE/PANi.