Facile Hydrothermal Synthesis of ZnCo2O4 Hexagonal Plate-Like Electrode for Supercapacitor Applications: Capacitive and Diffusive Mechanism of Trassati Method

Abstract

The Zinc cobaltite (ZnCo₂O₄), with its extensive redox reactions involving many ions and oxidation states, is an emerging electrode material for supercapacitors. The ZnCo₂O₄ prepared by using easy hydrothermal method. The generated material’s structural, morphological, textural, and electrochemical behaviour were analysed using XRD, FESEM, XPS, Raman, FTIR, BET, CV, GCD, and EIS. The prepared ZnCo₂O₄ material exhibits bundle of hexagonal plates (HPs) like structure. The prepared ZnCo₂O₄ HPs electrode delivers high specific capacitance of 950 Fg^− 1 at 5 mA. The prepared ZnCo₂O₄ HPs electrode exhibits capacity retention of 74.2% after 6500 cycles. ZnCo₂O₄ HPs electrode exhibits energy density of 21.1 Whkg^− 1 and power density of 446.8 Wkg^− 1at 5 mA. The findings show that ZnCo₂O₄ HPs have a great deal of promise for application as an effective supercapacitive electrode material because of their higher specific capacitance and increased cycle stability.