Non-Monotonic Capacitance Change of Layered Ti3C2Tx MXene Film Structures under Increasing Compressive Stress
Date
2022-12-09
Journal Title
Journal ISSN
Volume Title
Publisher
Advanced Functional Materials
Abstract
The progress in advanced electronic devices has imposed a great demand for developing flexible electrochemical power devices, which requires a comprehensive understanding of the mechanical–electrochemical coupling behavior of various energy storage materials. Unlike a monotonic capacitance increase of carbon-based double-layer supercapacitors, MXene-based flexible supercapacitors demonstrate a non-monotonic, i.e., “increase-then-decrease” capacitance behavior under the pressure range of 8488 kPa. This non-monotonic capacitance response to pressure is intrinsic to the MXene film as its charge storage is primarily determined by the surface activity, which can be readily affected by pressure-induced dissociation of functionalities, as well as the charge transporting kinetics as limited by the inherent layered structure. The findings described in this study not only expand the knowledge of mechanical–electrochemical coupling to layered MXenes under pressure, but also give a vital design guideline for flexible/stretchable MXene-based energy storage devices or other electronics.
Description
This is the peer reviewed version of the following article: Zhang, Q., Ning, R., Cao, J., Song, Q., Ye, J., Wei, B., Non-Monotonic Capacitance Change of Layered Ti3C2Tx MXene Film Structures under Increasing Compressive Stress. Adv. Funct. Mater. 2022, 2211791. https://doi.org/10.1002/adfm.202211791 , which has been published in final form at https://doi.org/10.1002/adfm.202211791. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. This article will be embargoed until 12/09/2023.
Keywords
functionality dissociation, layered structures, MXenes, pressure effects, supercapacitors
Citation
Zhang, Q., Ning, R., Cao, J., Song, Q., Ye, J., Wei, B., Non-Monotonic Capacitance Change of Layered Ti3C2Tx MXene Film Structures under Increasing Compressive Stress. Adv. Funct. Mater. 2022, 2211791. https://doi.org/10.1002/adfm.202211791