Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/27584
ชื่อเรื่อง: Activated carbons derived from sugarcane bagasse for high-capacitance electrical double layer capacitors
ผู้แต่ง: Phakkhawan A.
Horprathum M.
Chanlek N.
Nakajima H.
Nijpanich S.
Kumnorkaew P.
Pimanpang S.
Klangtakai P.
Amornkitbamrung V.
Keywords: Amorphous carbon
Bagasse
Capacitance
Carbonization
Chemical activation
Electrodes
Nitric acid
Potassium hydroxide
Scanning electron microscopy
Sodium hydroxide
Supercapacitor
วันที่เผยแพร่: 2022
บทคัดย่อ: 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.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119038947&doi=10.1007%2fs10854-021-07334-y&partnerID=40&md5=7774a4b31d1a9e0cd7e073ce4b24c557
https://ir.swu.ac.th/jspui/handle/123456789/27584
ISSN: 9574522
Appears in Collections:Scopus 2022

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