Study of Super Capacitive Behavior of Polyaniline/manganese Oxide-Carbon Black Nanocomposites Based Electrodes

Hosseini, M.G.; Shahryari, E.; Najjar, R.; Ahadzadeh, I.

Study of Super Capacitive Behavior of Polyaniline/manganese Oxide-Carbon Black Nanocomposites Based Electrodes

Document Type : Research Paper

Authors

M.G. Hosseini ¹

E. Shahryari ¹

R. Najjar ¹

I. Ahadzadeh ²

¹ Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Tabriz, I. R. Iran

² Department of organic Chemistry, University of Tabriz, Tabriz, I. R. Iran.

Abstract

The supercapacitive behavior of polyaniline/MnO₂-carbon black (PANI/MnO₂-CB), MnO₂-CB nanocompositesand CB was studied. MnO₂-CB made by the in situ direct coating method to deposit MnO₂ onto CB; then PANI coating was coated on it. Morphology of the nanocomposite was studied by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The electrochemical properties of electrodes were investigated by cyclic voltammetry (CV), galvanostatic charge–discharge and electrochemical impedance spectroscopy (EIS) techniques in 0.5 M Na₂SO₄. The specific capacitance of 179.8 F. g^-1 was obtained for PANI/MnO₂-CB compared with 121 F. g^-1 for MnO₂-CB and 44.87 F. g^-1 for CB. The EIS results also revealed improved capacitive properties of CB by the addition of MnO₂ and PANI.

Keywords

Chemical polymerization

Cycle stability

life time

PANI/MnO2-CB

Supercapacitor