Dall'Agnese, Y;
Taberna, PL;
Gogotsi, Y;
Simon, P;
(2015)
Two-dimensional vanadium carbide (MXene) as positive electrode for sodium-ion capacitors.
Journal of Physical Chemistry Letters
, 6
(12)
pp. 2305-2309.
10.1021/acs.jpclett.5b00868.
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Abstract
Ion capacitors store energy through intercalation of cations into an electrode at a faster rate than in batteries and within a larger potential window. These devices reach a higher energy density compared to electrochemical double layer capacitor. Li-ion capacitors are already produced commercially, but the development of Na-ion capacitors is hindered by lack of materials that would allow fast intercalation of Na-ions. Here we investigated the electrochemical behavior of 2D vanadium carbide, V<inf>2</inf>C, from the MXene family. We investigated the mechanism of Na intercalation by XRD and achieved capacitance of ∼100 F/g at 0.2 mV/s. We assembled a full cell with hard carbon as negative electrode, a known anode material for Na ion batteries, and achieved capacity of 50 mAh/g with a maximum cell voltage of 3.5 V.
| Type: | Article |
|---|---|
| Title: | Two-dimensional vanadium carbide (MXene) as positive electrode for sodium-ion capacitors |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.jpclett.5b00868 |
| Publisher version: | https://doi.org/10.1021/acs.jpclett.5b00868 |
| 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: | Li-ion capacitor, Na-ion capacitor, vanadium carbide, XRD, MXene |
| 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/10076106 |
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