Induced symmetric 2D Mesoporous Graphitic Carbon Spinel Cobalt Ferrite (CoFe2O4/2D-C) with high porosity fabricated via a facile and swift sucrose templated microwave combustion route for an improved supercapacitive performance

Abstract

Symmetric 2D Mesoporous Graphitic Carbon spinel cobalt ferrite (CoFe2O4/2D-C) with high porosity has been fabricated via a facile and swift sucrose template microwave combustion process followed by an additional annealing treatment. The CoFe2O4/2D-C composite comprises carbon coated spinel cobalt ferrite with densely connected porous layered structure facilitating fast electron and ion transport. Benefiting from such an inimitable structure, CoFe2O4/2D-C is employed as supercapacitors electrode material and exhibited a high specific capacitance (1318.1 Fg(-1) at 2.5 A g(-1) current density) and energy density (77.3 W h kg(-1)) with an excellent electrochemical capacity retention of 97.2 % after 4000 cycles. Power law which expresses the dependence of peak CV current on scan rate at fixed potential confirmed that, the charge storage mechanism for the electrode material (CoFe2O4/2D-C) is influenced congruently by both the capacitive and diffusive controlled process which promoted an efficient energy storage for CoFe2O4/2D-C. Accordingly, this outstanding performance put forward its application as an effective material for electrochemical capacitors.