Harnessing the potential of NiMn<sub>2</sub>O<sub>4</sub> nanoparticle: a next-generation supercapacitor electrode material
Mohammad Shariq, A.Z. AlZahrani, Eman Almutib, Abdulrahman F. Alharbi, Saud A. Algarni, Majed Y. Almashnowi, Souhail Mohammed Bouzgarrou, W.A. Ghaly, Syed Kashif Ali, K. F. Hassan
Abstract
Abstract This research addresses the pressing demand to enhance energy density and power in energy storage devices, including batteries, fuel cells, and supercapacitors. Here, NiMn 2 O 4 is synthesized using the urea combustion method. Characterization techniques, including powder x-ray diffraction, field emission scanning electron microscopy, and BET analysis, are employed to investigate its properties. The diffraction peaks showed that NMO had a face-centered tetragonal structure, and the Scherrer equation was used to figure out the average crystallite size (t) as 8.73 nm. Its electrochemical behavior is extensively evaluated through cyclic voltammetry and galvanic charge–discharge measurements. The findings indicate that the fabricated NiMn 2 O 4 electrodes exhibited remarkable specific capacitance and exceptional cycling stability, retaining 97% of their initial performance over 10000 cycles. The specific capacitance of the electrode from GCD was obtained 80 F g −1 at a current density of 0.25 A g –1 . This study highlights the potential of NiMn 2 O 4 as an electrode material for high-performance electrochemical supercapacitors, offering a viable solution for advancing energy storage technologies.