Oxidation of activated carbon (AC) with nitric acid was carried out, and the resulting AC/HNO3 showed high capacity when used as supercapacitor electrode material operated in the KOH electrolyte. Oxidation caused different structural changes in the AC, reducing the specific surface area and the total pore volume. After oxidation, the content of all types of oxygen-containing groups and, especially, carboxyl groups showed a significant increase. Despite the significant reduction of the specific surface area, the specific capacitance of the oxidized AC in symmetric supercapacitor electrodes is 1.4 times larger than that for the pristine AC.
Enhancing the Performance of Supercapacitor Activated Carbon Electrodes by Oxidation / Grishchenko, L. M.; Tsapyuk, G. G.; Ricco, M.; Diyuk, V. E.; Boldyrieva, O. Y.; Mariychuk, R.; Matushko, I. P.; Pontiroli, D.; Lisnyak, V. V.; Scaravonati, S.. - STAMPA. - 1:(2020), pp. 173-177. (Intervento presentato al convegno 40th IEEE International Conference on Electronics and Nanotechnology, ELNANO 2020 tenutosi a ukr nel 2020) [10.1109/ELNANO50318.2020.9088845].
Enhancing the Performance of Supercapacitor Activated Carbon Electrodes by Oxidation
Ricco M.;Pontiroli D.;Scaravonati S.
2020-01-01
Abstract
Oxidation of activated carbon (AC) with nitric acid was carried out, and the resulting AC/HNO3 showed high capacity when used as supercapacitor electrode material operated in the KOH electrolyte. Oxidation caused different structural changes in the AC, reducing the specific surface area and the total pore volume. After oxidation, the content of all types of oxygen-containing groups and, especially, carboxyl groups showed a significant increase. Despite the significant reduction of the specific surface area, the specific capacitance of the oxidized AC in symmetric supercapacitor electrodes is 1.4 times larger than that for the pristine AC.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
