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Recent advances in understanding the capacitive storage in microporous carbons

Daffos, Barbara and Taberna, Pierre-Louis and Gogotsi, Yury and Simon, Patrice Recent advances in understanding the capacitive storage in microporous carbons. (2010) Fuel Cells, 10 (5). 819-824. ISSN 1615-6846

(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

Official URL: http://dx.doi.org/10.1002/fuce.200900192


This article presents a review of our recent work on capacitance of carbide-derived carbons. Specific capacitance as high as 14 &F/cm² or 160 F/g was achieved using carbide derived carbons with tailored subnanometer pore size, which is significantly higher than 6 &F/cm² or 100 F/g) for conventional activated carbons. Such high capacitance was obtained in several types of organic electrolytes with or without solvent. A maximum is obtained for the carbons with the mean pore size close to the bare ion size, ruling out the traditional point of view that mesoporosity is highly required for maximum capacitance. Surprisingly, carbons with subnanometer porosity exhibit high capacitance retention, since only a 10% loss is measured when 6 A/g discharge is drawn. These findings show the importance of fitting the ion size with the mean pore size. The double layer theory falls short to explain such charge storage mechanisms at the nanometer scale, thus atomistic modeling is required to find out an alternative charge storage model.

Item Type:Article
Additional Information:Thanks to Wiley editor. The definitive version is available at http://onlinelibrary.wiley.com/ The original PDF can be found at http://onlinelibrary.wiley.com/doi/10.1002/fuce.200900192/abstract;jsessionid=450C8BC83259BD7EECC2F4087B06EC53.d03t02
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Drexel University (USA)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:16 Sep 2013 07:12

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