Electrosynthesis and Capacitive Performance of Polyaniline-Polypyrrole Composite

The composite of polyaniline and polypyrrole (PPY-PANI) was prepared by two-step electrochemical polymerization method. Techniques of scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and thermal gravity analysis (TG/DTG) measurements were used to characterize the morphology and structure of the composite. The electrochemical properties of the composite were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS). The results indicated that the polyaniline-polypyrrole composite showed better electrochemical capacitive performance than polypyrrole (PPY) and polyaniline (PANI). The specific capacitance of the composite electrode was 523 F/g at a current of 6 mA/cm(2) in 0.5 M H2SO4 electrolyte. POLYM. COMPOS., 32:1-5, 2011. (C) 2010 Society of Plastics Engineers