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Outstanding room-temperature capacitance of biomass-derived microporous carbons in ionic liquid electrolyte

Redondo, Edurne and Tsai, Wan-Yu and Daffos, Barbara and Taberna, Pierre-Louis and Simon, Patrice and Goikolea, Eider and Mysyk, Roman Outstanding room-temperature capacitance of biomass-derived microporous carbons in ionic liquid electrolyte. (2017) Electrochemistry Communications, 79. 5-8. ISSN 1388-2481

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Official URL: http://dx.doi.org/10.1016/j.elecom.2017.04.004

Abstract

A remarkable capacitance of 180 F·g−1 (at 5 mV·s−1) in solvent-free room-temperature ionic liquid electrolyte, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, was achieved in symmetric supercapacitors using microporous carbons with a specific surface area of ca. 2000 m2·g−1 calculated from gas sorption by the 2D-NLDFT method. The efficient capacitive charge storage was ascribed to textural properties: unlike most activated carbons, high specific surface area was made accessible to the bulky ions of the ionic liquid electrolyte thanks to micropores (1–2 nm) enabled by fine-tuning chemical activation. From the industrial perspective, a high volumetric capacitance of ca. 80 F·cm−3 was reached in neat ionic liquid due to the absence of mesopores. The use of microporous carbons from biomass waste represents an important advantage for large-scale production of high energy density supercapacitors.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at http://www.sciencedirect.com/science/article/pii/S1388248117300954
HAL Id:hal-01556598
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > CIC EnergiGUNE (SPAIN)
Laboratory name:
Funders:
Basque Government - European Research Council
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Deposited By: cirimat webmestre
Deposited On:05 Jul 2017 10:14

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