Fabrication of Bimetallic NiFe-Oxide Electrode Using Self-Templated Method and Its Electrochemical Properties

The increasing global demand for efficient, sustainable, and high-performance energy storage systems has intensified research into advanced materials for supercapacitors. Due to the limitation of the energy density of supercapacitors, the exploration of novel electrode materials with enhanced electrochemical performance is necessary. Nickel–iron (NiFe) oxides are considered highly suitable electrode materials for supercapacitors due to their high specific capacitance, high energy and power density, and excellent structural stability. This study focuses on the preparation of NiFe oxide using a self-template method. NiFe oxide was synthesized using a bimetallic NiFe glycerate as a precursor, involving solvothermal synthesis and calcination, to create a structure with high surface area and porosity. The characterization of NiFe oxides involved x-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, field-emission scanning electron microscopy (FESEM), and Brunauer–Emmett–Teller (BET) and cyclic voltammetry (CV) analyses. From the XRD spectra, amorphous pattern appeared before the calcination process, however, after the calcination, crystal formation occurred. FESEM and BET analyses showed significant changes in surface morphology and pore size distribution, indicating successful synthesis. The electrochemical CV analysis demonstrated high specific capacitance, good rate capability, and excellent stability. In conclusion, NiFe oxide is a promising material for supercapacitor electrodes, balancing high energy and power density. The calcination process during synthesis improves the morphological, structural, and electrochemical properties of NiFe oxide, enhancing its efficiency as an electrode material for supercapacitor application.