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Electrochemical and in-situ X-ray diffraction studies of Ti3C2Tx MXene in ionic liquid electrolyte

Lin, Zifeng and Rozier, Patrick and Duployer, Benjamin and Taberna, Pierre-Louis and Anasori, Babak and Gogotsi, Yury and Simon, Patrice Electrochemical and in-situ X-ray diffraction studies of Ti3C2Tx MXene in ionic liquid electrolyte. (2016) Electrochemistry Communications, 72. 50-53. ISSN 1388-2481

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Official URL: http://dx.doi.org/10.1016/j.elecom.2016.08.023

Abstract

2D titanium carbide (Ti3C2TxMXene) showed good capacitance in both organic and neat ionic liquid electrolytes, but its charge storage mechanism is still not fully understood. Here, electrochemical characteristics of Ti3C2Tx electrode were studied in neat EMI-TFSI electrolyte. A capacitive behavior was observed within a large electrochemical potential range (from −1.5 to 1.5 V vs. Ag). Intercalation and de-intercalation of EMI+ cations and/or TFSI− anions were investigated by in-situ X-ray diffraction. Interlayer spacing of Ti3C2Tx flakes decreases during positive polarization, which can be ascribed to either electrostatic attraction effect between intercalated TFSI−anions and positively charged Ti3C2Tx nanosheets or steric effect caused by de-intercalation of EMI+ cations. The expansion of interlayer spacing when polarized to negative potentials is explained by steric effect of cation intercalation.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at http://www.sciencedirect.com/science/article/pii/S1388248116302004
HAL Id:hal-01455318
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)
Other partners > Ministère de la Jeunesse, de l'Education Nationale et de la Recherche - MENRT (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:03 Feb 2017 13:39

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