UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

New insights into the electrochemical behaviour of porous carbon electrodes for supercapacitors

Ibrahim Abouelamaiem, D; Mostazo-López, MJ; He, G; Patel, D; Neville, TP; Parkin, IP; Lozano-Castelló, D; ... Brett, DJL; + view all (2018) New insights into the electrochemical behaviour of porous carbon electrodes for supercapacitors. Journal of Energy Storage , 19 pp. 337-347. 10.1016/j.est.2018.08.014. Green open access

[thumbnail of Abouelamaiem_New_insights.pdf]
Preview
Text
Abouelamaiem_New_insights.pdf - Published Version

Download (2MB) | Preview

Abstract

Activated carbons, with different surface chemistry and porous textures, were used to study the mechanism of electrochemical hydrogen and oxygen evolution in supercapacitor devices. Cellulose precursor materials were activated with different potassium hydroxide (KOH) ratios, and the electrochemical behaviour was studied in 6 M KOH electrolyte. In situ Raman spectra were collected to obtain the structural changes of the activated carbons under severe electrochemical oxidation and reduction conditions, and the obtained data were correlated to the cyclic voltammograms obtained at high anodic and cathodic potentials. Carbon-hydrogen bonds were detected for the materials activated at high KOH ratios, which form reversibly under cathodic conditions. The influence of the specific surface area, narrow microporosity and functional groups in the carbon electrodes on their chemical stability and hydrogen capture mechanism in supercapacitor applications has been revealed.

Type: Article
Title: New insights into the electrochemical behaviour of porous carbon electrodes for supercapacitors
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.est.2018.08.014
Publisher version: https://doi.org/10.1016/j.est.2018.08.014
Language: English
Additional information: © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Keywords: Activated carbons, Extreme potentials, in situ Raman spectra, Porous morphology, Supercapacitor
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10056180
Downloads since deposit
84Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item