Publication: Activated carbons derived from sugarcane bagasse for high-capacitance electrical double layer capacitors
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Issued Date
2022
Resource Type
Language
eng
File Type
application/pdf
ISSN
9574522
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of Materials Science: Materials in Electronics. Vol 33, No.2 (2022), p.663-674
Suggested Citation
Phakkhawan A., Horprathum M., Chanlek N., Nakajima H., Nijpanich S., Kumnorkaew P., Pimanpang S., Klangtakai P., Amornkitbamrung V. Activated carbons derived from sugarcane bagasse for high-capacitance electrical double layer capacitors. Journal of Materials Science: Materials in Electronics. Vol 33, No.2 (2022), p.663-674. doi:10.1007/s10854-021-07334-y Retrieved from: https://hdl.handle.net/20.500.14740/10331
Abstract
Activated carbon (AC) from sugarcane bagasse was prepared using a simple two-step method of carbonization and chemical activation with four different activating agents (HNO3, H2SO4, NaOH, and KOH). Amorphous carbon structure as identified by X-ray diffraction was observed in all samples. Scanning electron microscopy revealed that the AC had more porosity than the non-activated carbon (non-AC). Specific capacitance of the non-AC electrode was 32.58 F g−1 at the current density of 0.5 A g−1, whereas the AC supercapacitor provided superior specific capacitances of 50.25, 69.59, 109.99, and 138.61 F g−1 for the HNO3 (AC-HNO3), H2SO4 (AC-H2SO4), NaOH (AC-NaOH), and KOH (AC-KOH) activated carbon electrodes, respectively. The AC-KOH electrode delivered the highest specific capacitance (about 4 times of the non-AC electrode) because of its good surface wettability, the largest specific surface area (1058.53 m2 g−1), and the highest total specific pore volume (0.474 cm3 g−1). The AC-KOH electrode also had a great capacitance retention of almost 100% after 1000 GCD cycles. These results demonstrate that our AC developed from sugarcane bagasse has a strong potential to be used as high stability supercapacitor electrode material. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.