Electrochemical Synthesis of Interconnected Nanofiber Network of Polyaniline Electrode and Its Supercapacitive Properties

Abstract

In the present work, polyaniline (PANI) electrode material is synthesized by simple electrodeposition method on stainless steel (SS) substrate. The crystal structure and morphological characterizations of the obtained electrode material were carried out by using X-ray diffraction (XRD) technique and field emission-scanning electron microscopy (FE-SEM), respectively. The FE-SEM micrographs show interconnected nanofiber network like morphology. The electrochemical properties of PANI electrode like cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) were studied in a 1 M H2SO4 solution as electrolyte. The maximum specific capacitance is 277 F/g at scan rate 5 mV/sec obtained from CV. The electrochemical stability of PANI electrode was investigated using CV for 500 cycles. The PANI electrode exhibits good cycling stability for 500 cycles at scan rate 100 mV/sec. From all the electrochemical properties of PANI electrode, it indicates that it will be promising electrode material for supercapacitor application.