ZINC OXIDE BASED ELECTRODES FOR HIGH PERFORMANCE ENERGY STORAGE DEVICES: SYNTHESIS, CHARACTERIZATION, AND ELECTROCHEMICAL EVALUATION
Keywords:
ZnO nanostructures, Super capacitor electrodes, Sol–gel synthesis, electrochemical performance, Energy density(ED) and power density (PD)Abstract
Nanomaterials have attracted a large interest in sustainable electrochemical energy storage, essentially because of their capability to transform next-generation devices. Hybrid supercapacitors possess an optimistic perspective for portable and flexible energy storage systems. This is made possible by incorporating two-dimensional (2D) materials as interlayers. In this paper, we present our study on the synthesis and utilization of ZnO nanomaterials as positive electrode in hybrid supercapacitor device. ZnO has been prepared by sol-gel method, calcined and then its structural, morphological analysis done through X-ray diffraction (XRD). Electrochemical measurements like cyclic voltammetry (CV), Galvanic charge discharge (GCD) and Electrochemical spectroscopy (EIS) were used to characterize the electrochemical performance, exhibiting a maximum specific capacity of 500 C/g. The graph between specific power, specific current and specific energy demonstrated a maximum ED of 65.3 Wh/kg at a current density of 0.5 A/g, along with a maximum PD of 4000 W/kg at a current density of 5 A/g. Using Dunn’s model, we analyzed the capacitive and diffusion-controlled charge storage behaviors of our ZnO nanostructures. These findings highlight the strong electrochemical adaptability of ZnO nanostructures, confirming their potential for high-performance supercapacitor applications and offering valuable insights into advanced energy storage mechanisms.
