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High capacitance of surface-modified 2D titanium carbide in acidic electrolyte

Dall'Agnese, Yohan and Lukatskaya, Maria R. and Cook, Kevin M. and Taberna, Pierre-Louis and Gogotsi, Yury and Simon, Patrice High capacitance of surface-modified 2D titanium carbide in acidic electrolyte. (2014) Electrochemistry Communications, 48. 118-122. ISSN 1388-2481

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Official URL: https://doi.org/10.1016/j.elecom.2014.09.002

Abstract

The electrochemical behavior of Ti3C2, a two-dimensional titanium carbide from the MXene family, in H2SO4 electrolyte is reported. To demonstrate the effect of surface chemistry on capacitive performance, Ti3C2 was modified by delamination or intercalation treatments. Electrochemical testing revealed an increase in capacitance, which was attributed to oxygen-containing functional groups. An extraordinary high intercalation capacitance of 415F·cm−3 at 5A·g−1 was obtained from electrodes with a specific surface area of just 98m2·g−1. Values up to 520F·cm−3 were recorded for delaminated MXene films at 2mV·s−1. This study highlights that the behavior of materials from the large family of two-dimensional MXene can be tuned by suitable modification of their surface chemistry.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Other partners > Drexel University (USA)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > Sorbonne Université (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Other partners > Université de Montpellier (FRANCE)
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Deposited By: Yves MOMBOISSE
Deposited On:20 Mar 2019 09:02

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