A two-step process was applied to synthesize the cobalt ferrite-graphene composite materials in a one-pot hydrothermal reaction process. Graphene Oxide (GO) was synthesized by a modified Hummer’s method. The synthesized composite materials were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and Fourier-transform infrared spectroscopy (FTIR). The XRD and FTIR results were in good agreement with the TGA/DTG observations. SEM and TEM disclosed the spherical shape of the nanoparticles in 4–10 nm. The optimized CoFe2O4-G (1–5 wt.%) composite materials samples were tried for their conductivity, supercapacity, and corrosion properties. The CV results demonstrated a distinctive behavior of the supercapacitor, while the modified CoFe2O4-G (5 wt.%) electrode demonstrated a strong reduction in the Rct value (~94 Ω). The highest corrosion current density valves and corrosion rates were attained in the CoFe2O4-G (5 wt.%) composite materials as 5.53 and 0.20, respectively. The high conductivity of graphene that initiated the poor corrosion rate of the CoFe2O4-graphene composite materials could be accredited to the high conductivity and reactivity.

Cobalt ferrite/graphene nanocomposite materials were prepared by a one-pot hydrothermal method. Graphene oxide (GO) was synthesized by a modified Hummers method. The surface morphologies and structures of CoFe 2 O 4 /graphene nanocomposite materials were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), thermogravimetric analyzer (TGA), and fourier transform infrared spectroscopy (FTIR). SEM and TEM investigations unveiled that graphene sheets were uniformly well decorated by spherical cobalt ferrite nanoparticles (~ 3-6 nm). Electrochemical studies on CoFe 2 O 4 /graphene nanocomposite revealed the decline in the charge transfer resistance (~ 27 Ω), while on the other hand, higher corrosion current density (0.3837) and corrosion rates (0.00446) were observed. Cyclic voltammograms (CV) outcomes confirmed supercapacitor performance. The poor corrosion performance of the nanocomposite materials could be attributed to its higher conductivity.

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