Nanoarchitectonics of GO/PANI/CoFe2O4 (Graphene Oxide/polyaniline/Cobalt Ferrite) based hybrid composite and its use in fabricating symmetric supercapacitor devices

The synthesis of graphene-based hybrid electrode material provides a prime share in supercapacitor device material application. Here, we have synthesized a new type ternary composite GO/PANI/CoFe2O4 (Graphene Oxide/polyaniline/Cobalt Ferrite) by the oxidative-polymerization method with superior electrochemical behaviour. The analysis like X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FE-SEM), and Energy-dispersive X-ray spectroscopy (EDS) confirm the successful formation of material. The hybrid composite GO/PANI/CoFe2O4 gives the highest specific capacitance value of 781.27 F/g at scan rate of 1 mV/s and 346.92 F/g at current density of 1 A/g from 3E (three-electrode) and symmetric 2E (two-electrode) device system. The system exhibits a wide 1.2 V potential window. From the symmetric system, the ternary GO/PANI/CoFe2O4 had high specific energy (Esp) of 69.38 Wh/kg at 1 A/g and high specific power (Psp) of 5989.37 W/kg at 20 A/g along with 79.03 % retention of its original capacitance after 50 0 0 cycles. The ternary material also showed a less Rct value of 8.51 & OHM; . The synergic effect of the individual components in the hybrid composite is the main factor for its excellent electrochemical behaviour. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

The synthesis of a new type ternary composite GO/PANI/CoFe2O4 with superior electrochemical behavior has been achieved, demonstrating its potential application as graphene-based hybrid electrode material in supercapacitors. The composite exhibits high specific capacitance values, wide potential window, and good energy density and power density, along with low Rct value. The synergistic effect of the individual components contributes to the excellent electrochemical behavior of the hybrid composite.