Nickel ferrite coated on carbon felt for asymmetric supercapacitor

Abstract

Nickel ferrite (NiFe2O4) is one of the nanostructures that has been the focus of researchers in the field of energy in recent years as an electrode, is conductive, stable, and cheap. In this research, for the first time, we have synthesized it using a felt carbon substrate. The synthesized electrode (NiFe2O4/CF) was evaluated by CV, GCD, and EIS in a three-electrode system using a KOH electrolyte. The results showed a specific capacity of 490 F/g at a current density of 1 A/g and a stability of 91.3 % after 5000 consecutive GCD cycles. Subsequent investigations were carried out in a two-electrode system for constructing an Asymmetrical supercapacitor using the NiFe2O4/CF and Active carbon electrodes. GCD analyses were conducted in a potential window of 1.5 V. The energy density and power density were determined as 39 Wh/kg and 410 W/kg Also, the use of activated carbon in the construction of the supercapacitor device improved the stability so that after 5000 consecutive charges and discharges, the constructed device showed 94.2 % stability. Finally, we examined the application of the supercapacitor made to keep the LED lamp on. We were able to keep the lamp on for 71 s.

Keywords

• Nickel ferrite
• Carbon felt
• Supercapacitor device
• Energy storage