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Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer

Chmiola, John and Yushin , G. and Gogotsi, Yury and Portet, Christele and Simon, Patrice and Taberna, Pierre-Louis Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer. (2006) Science Magazine , vol. 313 (n° 5794). pp. 1760-1763. ISSN 0036-8075

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Official URL: http://dx.doi.org/10.1126/science.1132195

Abstract

Carbon supercapacitors, which are energy storage devices that use ion adsorption on the surface of highly porous materials to store charge, have numerous advantages over other power-source technologies, but could realize further gains if their electrodes were properly optimized. Studying the effect of the pore size on capacitance could potentially improve performance by maximizing the electrode surface area accessible to electrolyte ions, but until recently, no studies had addressed the lower size limit of accessible pores. Using carbide-derived carbon, we generated pores with average sizes from 0.6 to 2.25 nanometer and studied double-layer capacitance in an organic electrolyte. The results challenge the long-held axiom that pores smaller than the size of solvated electrolyte ions are incapable of contributing to charge storage.

Item Type:Article
Additional Information:Thanks to American Association for the Advancement of Science editor. The definitive version is available at http://www.sciencemag.org The original PDF of the article can be found at Science Magazine website : http://www.sciencemag.org
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Drexel University (USA)
Laboratory name:
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Deposited By: Celine Cabaup

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