Structural, BET and EPR properties of mixed zinc-manganese spinel ferrites nanoparticles for energy storage applications

X-ray diffraction data (XRD) validated the characteristic crystalline spinel cubic structure and a Field-emission scanning electron microscope/energy dispersive spectroscopy (FE-SEM/EDS) validated the proper stoichio-metric element ratio of the prepared materials. By using X-ray photoelectron spectroscopy (XPS), the oxidation state of the elements in the prepared materials was verified. An electron paramagnetic resonance (EPR) spec-trometer confirmed that Lande factor (g) values decreased as Zn2+ concentration in MnFe2O4 increased. The electrochemical (EC) characteristics of the materials were verified during production using a three electrode instrument. The EC performances confirm the EC behavior of the electrode materials. We investigated the EC properties of the electrodes using cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) methods. The Mn0.85Zn0.15Fe2O4 (code as: MZF1) electrode material has a specific capacitance (Cs) of 62.96 F/g compared to Mn0.75Zn0.25Fe2O4 (code as: MZF2) and Mn0.65Zn0.35Fe2O4 (code as: MZF3) electrode at a current density (CD) of 0.5 A/g. According to recent research, electrode materials should be made with the necessary form and size for great act supercapacitor (SC) applications.