A One-Step Process Synthesized α-Fe2O3/CuO Composite Material Utilized in Supercapacitor Applications

In this study, α-Fe2O3/CuO composite materials intended for supercapacitor applications were successfully synthesized in a one-step process using Cu(NO3)2 and Fe(NO3)3 as precursors. The synthesized materials underwent rigorous characterization using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetry and differential scanning calorimetry, and Brunauer–Emmett–Teller surface area measurements. The supercapacitive performance of the α-Fe2O3/CuO composite materials in 1 M Na2SO4 aqueous electrolyte was evaluated using cyclic voltammetry and galvanostatic charge/discharge techniques. Notably, the α-Fe2O3/CuO composites demonstrated a remarkable specific capacitance of 670.6 F g1 at a current density of 2 A g1, accompanied by exceptional long-term stability. These outstanding performance characteristics can be attributed to the high power density, robust stability, excellent conductivity, and reversible reaction dynamics of the α-Fe2O3/CuO composite materials.