Enhanced Supercapacitive Performance of FeAl2O4 Nanoparticles with Neodymium (Nd) Doping by Sonication Method

In order to meet the demands of humanity and address the global environmental situation, it is imperative that we explore alternative energy sources and advance energy storage technology. The aim of this study was to investigate the impact of Nd-doping on the structural and electrochemical performance of FeAl 2 O 4 nanoparticles (NPs). The successful synthesis of Nd-doped FeAl 2 O 4 NPs) was accomplished through a simple sonication process. An evaluation was conducted on the properties of Nd-doping FeAl 2 O 4 NPs) to determine their suitability for supercapacitor (SC) applications. Moreover, the specific capacitance (Cs) of Nd-doped FeAl 2 O 4 NPs) reaches a maximum of 1194.69 F g −1 when subjected to a current density of 1.0 A g −1 compared to FeAl 2 O 4 nanoparticles. Furthermore, Nd-doped FeAl 2 O 4 NPs exhibited excellent cyclic stability and low impedance ( R ct = 0.07 Ω), owing to their modified morphology, making a promising material for supercapacitor SC electrodes that offer high capacity, affordability, and environmental friendliness. Our research has validated that the synthesized material can enhance the capacitive properties of transition-metal oxides with spinel structures in new, generated energy storage devices.