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Journal article
Violation of the Wiedemann–Franz Law and Ultralow Thermal Conductivity of Ti 3 C 2 T x MXene
ACS nano, v 18(47), pp 32491-32497
17 Nov 2024
Abstract
The high electrical conductivity and good chemical stability of MXenes offer hopes for their use in many applications, such as wearable electronics, energy storage, and electromagnetic interference shielding. While their optical, electronic, and electrochemical properties have been widely studied, information on the thermal properties of MXenes is scarce. In this study, we investigate the heat transport properties of Ti3C2T x MXene single flakes using scanning thermal microscopy and find exceptionally low anisotropic thermal conductivities within the Ti3C2T x flakes, leading to an effective thermal conductivity of 0.78 +/- 0.21 W m-1 K-1. This observation is in stark contrast to the predictions of the Wiedemann-Franz law, as the estimated Lorenz number is only 0.25 of the classical value. Due to the combination of low thermal conductivity and low emissivity of Ti3C2T x , the heat loss from it is 2 orders of magnitude smaller than that from common metals. Our study explores the heat transport mechanisms of MXenes and highlights a promising approach for developing thermal insulation, two-dimensional thermoelectric, or infrared stealth materials.
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Details
- Title
- Violation of the Wiedemann–Franz Law and Ultralow Thermal Conductivity of Ti 3 C 2 T x MXene
- Creators
- Yubin Huang - UCLouvainJean Spiece - UCLouvainTetiana Parker - Drexel UniversityAsaph Lee - Drexel UniversityYury Gogotsi - Drexel UniversityPascal Gehring (Corresponding Author) - UCLouvain
- Publication Details
- ACS nano, v 18(47), pp 32491-32497
- Publisher
- ACS Publications; WASHINGTON
- Number of pages
- 7
- Grant note
- Division of Chemistry: FNRS-CQ-1, FNRS-CDR-J.0068.21, FNRS-MIS-F.4523.22-TopoBrain, FNRS-CR-1, (FNRS-PDR-T.0029.22-Moire) F.R.S.-FNRS of Belgium: 21/26-116 Federation Wallonie-Bruxelles through the ARC: ERC-StG-10104144-MOUNTAIN, 40007563-CONNECT EUFWOF.R.S.-FNRS under the Excellence of Science (EOS) programChina Scholarship Council: 202108440051 Wallon-Brussels International (CSC-WBI): CHE-2318105 (M-STAR CCI) U.S. National Science Foundation
The authors acknowledge financial support from the F.R.S.-FNRS of Belgium (FNRS-CQ-1.C044.21-SMARD, FNRS-CDR-J.0068.21-SMARD, FNRS-MIS-F.4523.22-TopoBrain, FNRS-CR-1.B.463.22-MouleFrits, and FNRS-PDR-T.0029.22-Moire), from the Federation Wallonie-Bruxelles through the ARC Grant No. 21/26-116 and from the EU (ERC-StG-10104144-MOUNTAIN). This project (40007563-CONNECT) has received funding from the FWO and F.R.S.-FNRS under the Excellence of Science (EOS) program. Y.H. acknowledges support from the China Scholarship Council and Wallon-Brussels International (CSC-WBI funding, project No. 202108440051). Research at Drexel University was supported by the U.S. National Science Foundation under grant CHE-2318105 (M-STAR CCI).
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:001357811200001
- Scopus ID
- 2-s2.0-85209244974
- Other Identifier
- 991021963215704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
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