3D macroporous Ti3C2Tx MXene/cellulose nanofiber/rGO hybrid aerogel electrode with superior energy density

Xiaoyu Bi, Yang Shi, Shengbo Ge*, Ben Bin Xu, Xia Li*, Ximin He, Runzhou Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Reduced graphene oxide (rGO) and MXene have garnered significant attention due to their exceptional pseudocapacitance and electrical conductivity that are viable in energy storage applications. Nevertheless, the challenge of self-restacking between the 2D material surfaces and the tendency of MXene to oxidise have posed obstacles to their further utilisation. This prompted researchers to use cellulose nanofiber (CNF) as a prospective "bridge" to connect the two materials. This approach has been shown to prevent MXene from oxidising while facilitating GO conversion into rGO via reduction. Consequently, 3D macroporous Ti3C2Tx MXene/cellulose nanofibers/reduced graphene oxide (MCG) aerogels have been successfully prepared. A breakthrough in solving the self-stacking problem and creating a sensibly designed 3D macroporous electrode structure has yielded excellent electrochemical capabilities for MCG aerogel electrodes. Specifically at 1.0 mW cm-2 power density, these electrodes have demonstrated an outstanding performance in 5000 cycles with 79.4% retention rate, favourable areal specific capacitance of 671 mF cm-2, and unparalleled energy density of 60.9 mWh cm-2. Overall, this study offers significant perspectives on the possible uses of 2D materials, especially in terms of adjusting their structure and functionality.
Original languageEnglish
JournalAdvanced Composites and Hybrid Materials
Publication statusAccepted/In press - 20 Mar 2024

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