Abhimanyu SinghGaurav NathPawan Singh DhapolaSushant KumarTejas SharmaYee Hang SooH. K. JunPramod K. SinghSunanda KakrooAalia FaridMarium KhanSerguei V. SavilovM. Z. A. YahyaBhawana Joshi2024-10-152024-10-152023-01-2010.1007/s40243-023-00227-6https://dspace-cris.utar.edu.my/handle/123456789/2163The primary goal of the current study is to improve the specific capacitance of electric double-layer (EDLC) device using biomass (Tribulus Terrestris) derived activated carbon electrodes synthesized by chemical activation method. Furthermore, high surface area carbon electrodes are characterized using X-ray diffraction (XRD), RAMAN spectroscopy, and scanning electron microscopy (SEM) to confirm the morphological structure. Finally, the electrochemical performance of fabricated EDLC proves a good agreement data using Cyclic Voltammetry (CV), Low Impedance Spectroscopy (LIS), and Galvanostatic Charge–Discharge (GCD) analysis showing the high specific capacitance of 115 Fg⁻¹ for the optimized 1:2 activated carbon material.journal-article