Journal article
In situ electrochemical dilatometry of carbide-derived carbons
Electrochemistry communications, v 13(11), pp 1221-1224
2011
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The long life durability and extraordinary stability of supercapacitors are ascribed to the common concept that the charge storage is purely based on double-layer charging. Therefore the ideal supercapacitor electrode should be free of charge induced microscopic structural changes. However, recent in-situ investigations on different carbon materials for supercapacitor electrodes have shown that the charge and discharge is accompanied by dimensional changes of the electrode up to several percent. This work studies the influence of the pore size on the expansion behavior of carbon electrodes derived from titanium carbide-derived carbons with an average pore size between 5 and 8
Å. Using tetraethylammonium tetrafluoroborate in acetonitrile, the swelling of the electrodes was measured by in situ dilatometry. The experiments revealed an increased expansion on the negatively charged electrode for pores below 6
Å, which could be described with pore swelling.
► Carbide-derived carbon (CDC) supercapacitor electrodes undergo a dimensional change during charging and discharging. ► Using 1
M TEA-BF
4 in acetonitrile, the maximum swelling in a 3
V window is ~
2%. ► CDC swelling is dependent on the pore size and fully reversible. ► Large swelling corresponds with strong ion sieving.
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Details
- Title
- In situ electrochemical dilatometry of carbide-derived carbons
- Creators
- M.M Hantel - Electrochemistry Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, SwitzerlandV Presser - Department of Materials Science and Engineering & A.J. Drexel Nanotechnology Institute, Drexel University, PA 19104, USAR Kötz - Electrochemistry Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, SwitzerlandY Gogotsi - Department of Materials Science and Engineering & A.J. Drexel Nanotechnology Institute, Drexel University, PA 19104, USA
- Publication Details
- Electrochemistry communications, v 13(11), pp 1221-1224
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000297492800019
- Scopus ID
- 2-s2.0-80054967236
- Other Identifier
- 991014969872604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Electrochemistry