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Electrochemical Interaction of Sn-Containing MAX Phase (Nb2SnC) with Li-Ions

Zhao, S; Dall’Agnese, Y; Chu, X; Zhao, X; Gogotsi, Y; Gao, Y; (2019) Electrochemical Interaction of Sn-Containing MAX Phase (Nb2SnC) with Li-Ions. ACS Energy Letters , 4 pp. 2452-2457. 10.1021/acsenergylett.9b01580. Green open access

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Abstract

In this Letter, we report on the interaction of Nb2SnC ternary transition metal carbide (MAX phase) with Li ions. Because of the presence of Sn layers, which can undergo alloying reaction with Li, this material may be promising for energy storage. Contrary to most electrodes, the performance of this material improves along with the cycle number; specifically, the capacity increases gradually from 87 to 150 mAh g–1 at a current density of 500 mA g–1 during 600 charge/discharge cycles. Postcycling study suggests that the alloying reaction makes the material break into smaller particles, increasing capacity. Because Nb2SnC is just one of many MAX phases, this work lays the foundation for exploration of the MAX phases in lithium-ion or other batteries.

Type: Article
Title: Electrochemical Interaction of Sn-Containing MAX Phase (Nb2SnC) with Li-Ions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsenergylett.9b01580
Publisher version: https://doi.org/10.1021/acsenergylett.9b01580
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.
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/10081800
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