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

Dall'Agnese, Y; Lukatskaya, MR; Cook, KM; Taberna, PL; Gogotsi, Y; Simon, P; (2014) High capacitance of surface-modified 2D titanium carbide in acidic electrolyte. Electrochemistry Communications , 48 pp. 118-122. 10.1016/j.elecom.2014.09.002. Green open access

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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 415 F·cm− 3 at 5 A·g− 1 was obtained from electrodes with a specific surface area of just 98 m2·g− 1. Values up to 520 F·cm− 3 were recorded for delaminated MXene films at 2 mV·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.

Type: Article
Title: High capacitance of surface-modified 2D titanium carbide in acidic electrolyte
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.elecom.2014.09.002
Publisher version: https://doi.org/10.1016/j.elecom.2014.09.002
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Electrochemical capacitors, Two-dimensional materials,XPS, Surface chemistry
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery
URI: https://discovery.ucl.ac.uk/id/eprint/10076097
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