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Electrochemical and <i>in-situ</i> X-ray diffraction studies of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene in ionic liquid electrolyte [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
pages 50-53 : digital, PDF file
Additional Creators:
Oak Ridge National Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
2D titanium carbide (Ti3C2Tx MXene) 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. In conclusion, the expansion of interlayer spacing when polarized to negative potentials is explained by steric effect of cation intercalation.
Report Numbers:
E 1.99:1334486
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Note:
Published through SciTech Connect.
08/26/2016.
"KC0307010"
"ERKCC61"
Electrochemistry Communications 72 C ISSN 1388-2481 AM
Zifeng Lin; Patrick Rozier; Benjamin Duployer; Pierre -Louis Taberna; Babak Anasori; Yury G. Gogotsi; Patrice Simon.
Funding Information:
AC05-00OR22725
View MARC record | catkey: 24045322