A4 Conference proceedings

Production of porous activated carbons from cellulose for high-performance supercapacitors


Publication Details
Authors: Sermyagina Ekaterina, Murashko Kirill, Nevstrueva Daria, Pihlajamäki Arto, Vakkilainen Esa
Publication year: 2018
Language: English
Title of parent publication: Young Biomass Researchers Conference 2018
JUFO-Level of this publication: 0
Open Access: Not an Open Access publication

Abstract

Activated carbons were produced from cellulose by hydrothermal carbonization followed by chemical activation with KOH. Produced materials are subsequently used to make flexible self-standing electrodes for an electrical double layer capacitors. The effect of HTC process parameters on the porosity development and properties of the electrodes is evaluated with several variations of the residence time and water/cellulose ratio during the treatment. The analysis shows that HTC intensification results in increase of the surface area both hydrochar samples and activated carbons: the highest surface area for the sample produced after 2 h HTC treatment with water/cellulose ratio of 6/1 – 2645 m2 g-1. The highest values of the specific capacitance are found for the samples AC-2-3/1 and AC-2-6/1: 110.3 and 102.5 F g-1 correspondingly. The present study proves the possibility to substitute commercial activated carbons with cellulose-derived materials, the porosity of which can be tuned accordingly during the pretreatment step.


Last updated on 2018-24-10 at 10:07