Sunflower Stalk Based Activated Carbon for Supercapacitors

Yıl 2019, Cilt: 47 Sayı: 3, 235 - 247, 23.10.2019

Alp Yürüm

https://doi.org/10.15671/hjbc.509201

Cited By: 4

Öz

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.

Anahtar Kelimeler

sunflower stalk, activated carbon, supercapacitor

Kaynakça

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