Abstract
The current study involved a two-step process to create nanocomposites (NCs) of Zinc oxide (ZnO)/Copper manganite (CuMn2O4). Pure ZnO, CuMn2O4 nanoparticles, and ZnO/CuMn2O4 NCs were synthesized through co-precipitation and hydrothermal techniques. The Power X-ray Diffraction (PXRD) pattern indicates the existence of hexagonal wurtzite and spinel cubic phase structures of ZnO and CuMn2O4 in ZnO/CuMn2O4NCs. The appearance of three peaks at 542 cm−1, 634 cm−1, and 439 cm−1 in ZnO/CuMn2O4 NCs can be attributed to the stretching and bending vibration bands of Mn–O, Cu–O, and Zn–O metal oxides as revealed by the FTIR studies. FESEM analysis revealed that the ZnO, CuMn2O4 and ZnO/CuMn2O4 NCs had a spherical morphology, while EDAX analysis identified the elemental composition of Zn, Cu, Mn, and O in the prepared materials. Cyclic voltammetry (CV), galvanostatic charge discharge (GCD), and electrochemical impedance spectroscopy (EIS) measurements were used to investigate the electrochemical performance of the prepared material. According to the electrochemical findings, the ZnO/CuMn2O4 electrode exhibited Faradic behavior similar to that of a battery, and at a current density of 0.4 Ag−1 in a 2 M KOH electrolyte, it recorded the highest specific capacitance value of 562.36 Fg−1 compared to ZnO and CuMn2O4. Based on the observed results, prepared ZnO/CuMn2O4 NCs are well suited for ultrafast redox kinetics due to their improved ionic conductivity and electrochemical stability.
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KA (First & Corresponding author): Investigation, Writing—original draft & supervision, AS: Methodology, conceptualization, Writing—Review & editing, SM: Validation & formal analysis, TRC: Writing—Review & editing, conceptualization, software. All authors commented on the previous version of the manuscript and after reading it they have approved the final manuscript.
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Ambujam, K., Sridevi, A., Meivel, S. et al. Studies on electrochemical properties of ZnO/CuMn2O4 NCs as electrode material for supercapacitor application. J Mater Sci: Mater Electron 35, 578 (2024). https://doi.org/10.1007/s10854-024-12228-w
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DOI: https://doi.org/10.1007/s10854-024-12228-w