Laser exfoliated 2D MXene for supercapacitor applications
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Accepted version
Supporting information
Author(s)
Type
Journal Article
Abstract
MXenes-based compounds, particularly Ti3C2Tx, have been studied intensively as electrodes for supercapacitors due to their layered structure and high conductivity, enabling facile ion diffusion and charge transfer. However, tight restacking of the 2D layers in these materials limits their practical, accessible surface area, thereby impeding their capacity and rate capability performance. To mitigate this phenomenon, we present a new approach using a processing method based on laser beam irradiation to modify Ti3C2Tx films. We found that the laser treatment induces chemical and morphological changes, ultimately optimizing the stacking arrangement of the MXene electrodes and consequently enhancing their capacity in both neutral and acidic electrolytes. Furthermore, the laser-modified MXene electrodes demonstrate excellent rate capabilities, showing 84 % retention at extreme rates of 0.5 V compared to only 33 % of the original Ti3C2Tx electrodes. Finally, we discuss the chemical and physical changes induced by the laser treatments and their influence on the electrochemical behavior of the lasered MXene. The principles of laser exfoliation discovered in this study can be implemented in broader 2D materials for various applications.
Date Issued
2024-11-15
Date Acceptance
2024-11-01
Citation
Chemical Engineering Journal, 2024, 500
ISSN
1385-8947
Publisher
Elsevier
Journal / Book Title
Chemical Engineering Journal
Volume
500
Copyright Statement
Copyright © 2024 Elsevier B.V. This is the author’s accepted manuscript made available under a CC-BY licence in accordance with Imperial’s Research Publications Open Access policy (www.imperial.ac.uk/oa-policy)
License URL
Subjects
CAPACITANCE
Engineering
Engineering, Chemical
Engineering, Environmental
Science & Technology
Technology
Publication Status
Published
Article Number
157342
Date Publish Online
2024-11-09