Facile synthesis of bimetallic CuFe2O4 based ternary hybrid composites for supercapacitor electrodes and optimization of weight ratio of the individuals on the basis of their electrochemical performances

Abstract

Electrochemical characterisations like cyclic voltammetry, charge-discharge, electrochemical impedance spectroscopy are performed to find out the best ratio of aniline, acetylene black, and copper ferrite. Polyaniline-acetylene black-CuFe2O4 (PACF1) based two-electrode cell having the weight ratio of 4:1:2 had the highest specific capacitance of 279.48 F/g at 1 mA. It exhibits the highest coulombic efficiency value of 99.5%. PACF1 offers the maximum specific energy and specific power values of 38.81 Wh/kg and 125 W/kg, respectively, at a current of 1 mA. So, PACF1 holds the best weight ratio of aniline, acetylene black, and copper ferrite, i.e. 4:1:2. It exhibits a reasonably low charge transfer resistance of 1.7 Ω. It also has quite good capacitance retention of 85% after 6000 cycles. © 2022 Informa UK Limited, trading as Taylor & Francis Group.