Optimization of Sesamum indicum oil (sesame oil) derived activated carbon soot for electric double-layer capacitor (EDLC) application

Electric double-layer capacitor (EDLC) plays a major role in the area of energy storage devices. Still, efficient and long-lasting EDLCs using sustainable carbonaceous materials remain a challenge. In this research work, a novel and low-cost activated carbon soot has been derived from the sesamum indicum oil (sesame oil) using carbon obtained by flame synthesis method and further activated with ZnCl 2 and KOH in different wt %. The main facilitator to the electrode fabrication for EDLC was the agglomerated carbon nano-onions like porous carbon material derived from sesame oil. The structural morphology was studied and examined using X-ray diffraction (XRD), scanning electron microscope (SEM), and infrared spectroscopy. BET characterization shows that sesame oil derived carbon soot activated with KOH in 1:2 wt% (SoACS K2 ) shows excellent porosity and high specific surface area 1158 m 2 g −1 . Electrochemical investigation was done using 0.5 M NaPF 6 as an electrolyte and SoACS K2 shows maximum specific capacitance 94 F g −1 at 0.5 mA g −1 with maximum energy density of 10.5 Wh kg −1 and power density of 1350 W kg −1 having good durability over more than 2000 cycles.