Sunflower Stalk Based Activated Carbon for Supercapacitors

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Hacettepe Journal of Biology and Chemistry
Volume:47 Issue:3
Sunflower Stalk Based Activated Carbon for Supercapacitors

Sunflower Stalk Based Activated Carbon for Supercapacitors

Pages : 235-247

View : 18 | Download : 10

Publication Date : 2019-10-23

Article Type : Research Paper

Abstract :In this study, a combination of physical and chemical activation was used to produce activated carbon from sunflower stalks. The NaOH activated carbon possess a high specific surface area of 2658 m 2 /g. The micropore fraction and surface area obtained is much higher than a commercial activated carbon. The electrodes from the activated carbons were electrochemically analyzed in a two-electrode supercapacitor cell with 1 M H 2 SO 4 electrolyte. The results show that the high surface area of sunflower activated carbon resulted in significantly high specific capacitance of 207 F/g at 0.05 A/g current density. Moreover, a high energy density of 18.4 Wh/kg was obtained at the power density of 80 W/kg. The results also showed the importance of pore structure on the supercapacitor performance.
Keywords : sunflower stalk, activated carbon, supercapacitor

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