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 m2/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 H2SO4
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.
Primary Language | English |
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Subjects | Engineering |
Journal Section | Articles |
Authors | |
Publication Date | October 23, 2019 |
Acceptance Date | May 27, 2019 |
Published in Issue | Year 2019 Volume: 47 Issue: 3 |
HACETTEPE JOURNAL OF BIOLOGY AND CHEMİSTRY
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