Investigation on ZnO nanoflakes as an electrode material for hybrid supercapacitor application
摘要
ZnO nanoflakes were successfully synthesized via, sol-gel method using 2-methoxyethanol as a solvent and 2-mercaptoethanol as a surfactant. X-ray diffraction confirmed the hexagonal wurtzite structure of the ZnO nanoflakes, while FTIR spectroscopy verified the presence of ZnO vibrations. Scanning electron microscopy (SEM) revealed that the nanoflake-like morphology. The three electrode measurement demonstrates the battery behavior of the ZnO electrode which was observed from the CV studies. In this electrode exhibits maximum specific capacity of 420 C g− 1, at specific currents of 2.5 A g⁻¹. AC- impedance studies reveals that low charge transfer resistance which makes the high power performance of the electrode material. Remarkably, the electrode demonstrated excellent cyclic stability, retaining its 92% capacity after 1600 charge-discharge cycles. These electrochemical findings suggest that ZnO nanoflakes are a promising electrode material for hybrid supercapacitor applications.