Electrochemical Properties of CNF/CoFe2O4 Composite for Supercapacitor Application

Abstract

This paper presents the facile technique of decoration of CoFe2O4 nanoparticles on electrospun carbon nanofibers (CNF) by two step approach via electrospinning and hydrothermal for supercapacitor. Fabrication of CNF by electrospinning process is followed by decoration of CoFe2O4 on CNF using one pot hydrothermal method. CNF/CoFe2O4 nanocomposite hybrid was characterized by x-ray diffraction, scanning electron microscopy and energy dispersive x-ray spectroscopy for their structural, surface morphological and elemental properties. The charge transfer mechanism and mass diffusion process was studied using electrochemical impedance technique using frequency range 0.01Hz to 1MHz. Electrochemical behavior was studied using cyclic voltammetry and galvanostatic charge-discharge that showed the maximum specific capacitance 188.36 Fg-1 at current density 0.5 Ag-1 with potential window -0.2 to 1.0 V. Results showed that CNF/CoFe2O4 nanocomposite is potential candidate as electrode for supercapacitor.