ScholarWorks@중앙대학교

초록

The zinc oxide (ZnO) nanostructures are widely regarded as promising candidates for advanced energy storage systems owing to their outstanding electrochemical behaviour. ZnO nanostructures are fabricated through an eco-conscious bottom-up synthesis route using night jasmine leaf extract as a natural reducing and stabilizing medium. The synthesis is carried out without the use of any additional catalysts, highlighting the green and sustainable nature of the process. The synthesized ZnO nanostructures are systematically characterized by X-ray diffraction to determine the crystalline phase, Fourier transform infrared spectroscopy to identify the surface functional groups, scanning electron microscopy to examine morphological features, and energy-dispersive X-ray spectroscopy to confirm elemental composition. Electrochemical performance is evaluated using cyclic voltammetry in a three-electrode configuration, where the ZnO electrode exhibits pronounced pseudocapacitive behaviour. The night jasmine-derived ZnO coated on a stainless steel substrate delivers a high specific capacitance of 480 F/g at a scan rate of 2 mV/s, while maintaining stable performance during repeated measurements. These results demonstrate that green-synthesized ZnO nanostructures provide a low-cost, sustainable, and efficient pathway for supercapacitor applications.

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