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Two-Dimensional Vanadium Carbide (MXene) as Positive Electrode for Sodium-Ion Capacitors
Journal article   Open access   Peer reviewed

Two-Dimensional Vanadium Carbide (MXene) as Positive Electrode for Sodium-Ion Capacitors

Yohan Dall’Agnese, Pierre-Louis Taberna, Yury Gogotsi and Patrice Simon
The journal of physical chemistry letters, v 6(n° 12), pp 2305-2309
18 Jun 2015
PMID: 26266609
url
https://doi.org/10.1021/acs.jpclett.5b00868View
Published, Version of Record (VoR) Open

Abstract

Chemical Physics Chemical engineering Superconductivity Condensed Matter Material chemistry Chemical Sciences Physics ESI Highly Cited Paper (Incites)
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, V2C, 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.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Chemistry, Physical
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
Physics, Atomic, Molecular & Chemical
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