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Thermally Reduced Graphene/MXene Film for Enhanced Li-ion Storage

Xu, S; Dall'Agnese, Y; Li, J; Gogotsi, Y; Han, W; (2018) Thermally Reduced Graphene/MXene Film for Enhanced Li-ion Storage. Chemistry - A European Journal , 24 (69) pp. 18556-18563. 10.1002/chem.201805162. Green open access

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Abstract

Two-dimensional transition-metal carbides called MXenes are emerging electrode materials for energy storage due to their metallic electrical conductivity and low ion diffusion barrier. In this work, we combined Ti2 CTx MXene with graphene oxide (GO) followed by a thermal treatment to fabricate flexible rGO/Ti2 CTr film, in which electrochemically active rGO and Ti2 CTr nanosheets impede the stacking of layers and synergistically interact producing ionically and electronically conducting electrodes. The effect of the thermal treatment on the electrochemical performance of Ti2 CTx is evaluated. As anode for Li-ion storage, the thermally treated Ti2 CTr possesses a higher capacity in comparison to as-prepared Ti2 CTx . The freestanding hybrid rGO/Ti2 CTr films exhibit excellent reversible capacity (700 mAh g-1 at 0.1 Ag-1 ), cycling stability and rate performance. Additionally, flexible rGO/Ti3 C2 Tr films are made using the same method and also present improved capacity. Therefore, this study provides a simple, yet effective, approach to combine rGO with different MXenes, which can enhance their electrochemical properties for Li-ion batteries.

Type: Article
Title: Thermally Reduced Graphene/MXene Film for Enhanced Li-ion Storage
Location: Germany
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/chem.201805162
Publisher version: https://doi.org/10.1002/chem.201805162
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 storage, MXene, flexible anodes, graphene, porous film
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/10067516
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