Citation
Abstract
Ion pre-intercalation regulating the tunnel structure of electrode materials accelerates Zn2+ insertion kinetics to realize a high energy storage contribution of Zn-ion batteries. However, electrostatic interaction induced by the pre-intercalated cation and multivalent Zn2+ ions hinders the insertion of Zn2+/H+. In order to retain the negative interlayer surface, herein, OTf− anions were intercalated into the confined spacing by MXene via an electrochemical-driven method. Without changing the potential state of the interlayer spacings, OTf− anion induced a regulated interlayer distance, and a higher oxidation state of V based on the space occupation and the electron transfer mechanism. Consequently, the zinc ion storage capacity of V2CTx MXene increases from 125.2 to 288.7 mAh/g at 0.5 A/g. Interestingly, the negatively charged MXene surface was still intact, which presents lower diffusion barriers of the Zn2+ ions. The merits of anion pre-intercalation are highlighted and provide new insights into the ion storage function-oriented design of MXene.
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Additional Metadata
Item Type: | Article |
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Divisions: | Faculty of Science |
DOI Number: | https://doi.org/10.1016/j.carbon.2024.118828 |
Publisher: | Elsevier |
Keywords: | V2CTx MXene; Anion; Intercalation; Zinc ion battery |
Depositing User: | Mohamad Jefri Mohamed Fauzi |
Date Deposited: | 15 May 2024 06:05 |
Last Modified: | 15 May 2024 06:05 |
Altmetrics: | http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.carbon.2024.118828 |
URI: | http://psasir.upm.edu.my/id/eprint/105637 |
Statistic Details: | View Download Statistic |
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