Preparation and Characterization of the Cobalt Doped Polyaniline/MWCNT Nanocomposites for Supercapacitor Application

Abstract

Transition metal ion doped polyaniline (PANI)/ multiwall carbon nanotube (MWCNT) composite was successfully prepd. by in-situ oxidative polymn. of aniline monomer for supercapacitor application. The Co-doped PANI/MWCNTs composite showed improved capacitive behavior and lower elec. resistance compared to HCl doped PANI (DPANI)/MWCNT composite. By using carbon nanotube with conducting polymer offer exceptional power and high performance by supplying high surface area, high cond. and high retention of mech. strength under charge-discharge cycle. All the materials were characterized by Fourier transform IR spectroscopy (FT-IR), Raman spectroscopy, field emission SEM (FESEM), transmission electron microscopy (TEM). The electrochem. capacitive performance of the asym. supercapacitor was tested by cyclic voltammetry (CV), impedance spectroscopy (EIS) and cyclic charge-discharge (CCD) test in a three-electrode system. The highest specific capacitance value (576 F/g) was obtained at a scan rate of 2 mV/s in 1 (M) KOH electrolyte for Co-PANI/MWCNTs composite. [on SciFinder(R)]