MOF-derived dessert rose like ZnMn₂O₄ electrode material for high-performance supercapacitors

This report describes the use of an easy and economical two-step hydrothermal technique to produce metal organic framework-derived dessert rose like ZnMn₂O₄. Field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) were used to analyse the structure properties of the prepared sample. Electrochemical impedance spectroscopy (EIS), galvanostatic charge–discharge (GCD), and cyclic voltammetry (CV) were used to examine the electrochemical performance. After 5000 GCD cycles in an aqueous electrolyte (3 M-KOH) at a current density of 10 A/g, the constructed MOF-derived ZnMn₂O₄ electrode exhibits an exceptional capacitance retention of about 98%. The material shows a high specific capacity of 1040 F/g at a current density of 1 A/g than pure ZnMn₂O₄ (630 F/g at a current density of 1 A/g) within the high potential range of − 0.2 to 0.4 V. The findings are suggested that spinel oxide material produced from metal organic framework serves as a promising electrode material for high-performance supercapacitors.