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.
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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 |
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