Abstract

Transition metal ion doped poly-aniline (PANI)/ multiwall carbon nanotube (MWCNT) composite was successfully prepared by in-situ oxidative polymerization of aniline monomer for supercapacitor application. The Co-doped PANI/MWCNTs composite showed improved capacitive behavior and lower electrical resistance compared to HCl doped PANI (DPANI)/MWCNT composite. By using carbon nano tube with conducting polymer offer exceptional power andhigh performance by supplying high surface area, high conductivity and high retention of mechanical strength under charge-discharge cycle. All the materials were characterized by Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM). The electrochemical capacitive performance of the asymmetric 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.

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