Role of Magnetic Field on Supercapacitive Properties of Electrospun NiCo₂O₄ Nanofiber

The ever-growing demand for high power and energy density in electrical vehicles has triggered an interest in the development of supercapacitor due to its long cyclibility, high power density and environment friendly nature. Recently, effect of magnetic field on electrochemical performance of magnetic material has attracted much attention due to its great impact on improving capacitive performance. To understand the effect of magnetic field on supercapacitive performance of NiCo₂O₄ (Ni-Co) nanofiber, it has been first fabricated by electrospinning technique and then the material is characterized by TGA, XRD, FE-SEM and BET. The magnetic properties of Ni-Co has also been evaluated. The electrochemical measurements like cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) have been performed in 2M KOH electrolyte solution in the presence/absence of 3 mT external magnetic field. In the presence of 3 mT magnetic field, Ni-Co nanofiber displays a change in capacitance value from 245 F g^-1 to 270 F g^-1 at 0.25 A g^-1. A number of studies have been carried out to understand this change in supercapacitive properties. The results will be discussed in detail at the time of presentation.