Аннотация:The primary goal of the current study is to improve the specifc capacitance of electric double-layer (EDLC) device usingbiomass (Tribulus Terrestris) derived activated carbon electrodes synthesized by chemical activation method. Furthermore,high surface area carbon electrodes are characterized using X-ray difraction (XRD), RAMAN spectroscopy, and scanningelectron microscopy (SEM) to confrm the morphological structure. Finally, the electrochemical performance of fabricatedEDLC proves a good agreement data using Cyclic Voltammetry (CV), Low Impedance Spectroscopy (LIS), and Galvanostatic Charge–Discharge (GCD) analysis showing the high specifc capacitance of 115 Fg−1 for the optimized 1:2 activatedcarbon material.