Design and fabrication of iron-doped nickel oxide-based flexible electrode for high-performance energy storage applications

In this study, we report on the synthesis of pristine and iron (Fe)-doped nickel oxide nanoparticles (NPs) using a precipitation method. The optical, magnetic, and supercapacitor properties of NPs were investigated via ultraviolet-visible absorption, vibrating sample magnetometer (VSM), and cyclic voltammetry (CV). The effect of Fe doping on the optical bandgap of NiO nanoparticles demonstrates that the bandgap increases with increasing doping concentration (x = 0.02 M, 0.04 M, and 0.06 M). The VSM exhibits ferromagnetic behavior at room temperature. Fe doped sample shows promising supercapacitor electrode material properties ensuring that NiO: Fe could act as an enhanced working electrode for the future generation of supercapacitors.

Automated summary

This study demonstrates the synthesis of pristine and iron-doped nickel oxide nanoparticles using a precipitation method and investigates their optical, magnetic, and supercapacitor properties. The findings show that the optical bandgap of NiO nanoparticles increases with increasing doping concentration of iron, and the doped sample exhibits ferromagnetic behavior at room temperature. The iron-doped sample shows promising properties as a supercapacitor electrode material, suggesting potential for future supercapacitor applications.