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Capacitance of Ti3C2Tx MXene in ionic liquid electrolyte

Lin, Zifeng and Daffos, Barbara and Taberna, Pierre-Louis and Van Aken, Katherine L. and Anasori, Babak and Gogotsi, Yury and Simon, Patrice Capacitance of Ti3C2Tx MXene in ionic liquid electrolyte. (2016) Journal of Power Sources, 326. 575-579. ISSN 0378-7753

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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2016.04.035

Abstract

Ti3C2Tx MXene, a two-dimensional (2D) early transition metal carbide, has shown an extremely high volumetric capacitance in aqueous electrolytes, but in a narrow voltage window (less than 1.23 V). The utilization of MXene materials in ionic liquid electrolytes with a large voltage window has never been addressed. Here, we report the preparation of the Ti3C2Tx MXene ionogel film by vacuum filtration for use as supercapacitor electrodes operating in 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI-TFSI) neat ionic liquid electrolyte. Due to the disordered structure of the Ti3C2Tx hydrogel film and a stable spacing after vacuum drying, achieved through ionic liquid electrolyte immersion of the Ti3C2Tx hydrogel film, the Ti3C2Tx surface became accessible to EMI+ and TFSI− ions. A capacitance of 70 F g−1 together with a large voltage window of 3 V was obtained at a scan rate of 20 mV s−1 in neat EMI-TFSI electrolyte. The electrochemical signature indicates a capacitive behavior even at a high scan rate (500 mV s−1) and a high power performance. This work opens up the possibilities of using MXene materials with various ionic liquid electrolytes.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com
HAL Id:hal-01466709
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 - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:13 Feb 2017 15:47

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