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Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation
Journal article   Open access   Peer reviewed

Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation

Fushuo Wu, Peiying Hu, Feiyue Hu, Zhihua Tian, Jingwen Tang, Peigen Zhang, Long Pan, Michel W. Barsoum, Longzhu Cai and ZhengMing Sun
Nano-micro letters, v 15(1), pp 194-194
09 Aug 2023
DOI: https://doi.org/10.1007/s40820-023-01158-7
PMID: 37556089
url
https://doi.org/10.1073/pnas.2310870120View
Published, Version of Record (VoR)CC BY V4.0,  Open
url
https://doi.org/10.1007/s40820-023-01158-7View
Published, Version of Record (VoR) Open

Abstract

Article Engineering Microwave absorption and EMI shielding Nanoscale Science and Technology Nanotechnology Nanotechnology and Microengineering ESI Highly Cited Paper (Incites)
Highlights Curving 2D MXene into 1D nanofibers can effectively stop the restacking of MXene flakes, and then the nanofibers are used to construct a lightweight and multifunctional MXene/C aerogel. The MXene/C aerogels achieved an RL min of − 53.02 dB and EAB of 5.3 GHz. The radar cross-sectional reduction value of MXene/C aerogels can reach 12.02 dB m 2 . Integrating multiple functions such as thermal insulation, sensing, and microwave absorption into one material—MXene/C aerogel. Two-dimensional transition metal carbides and nitrides (MXene) have emerged as promising candidates for microwave absorption (MA) materials. However, they also have some drawbacks, such as poor impedance matching, high self-stacking tendency, and high density. To tackle these challenges, MXene nanosheets were incorporated into polyacrylonitrile (PAN) nanofibers and subsequently assembled into a three-dimensional (3D) network structure through PAN carbonization, yielding MXene/C aerogels. The 3D network effectively extends the path of microcurrent transmission, leading to enhanced conductive loss of electromagnetic (EM) waves. Moreover, the aerogel’s rich pore structure significantly improves the impedance matching while effectively reducing the density of the MXene-based absorbers. EM parameter analysis shows that the MXene/C aerogels exhibit a minimum reflection loss (RL min ) value of − 53.02 dB ( f  = 4.44 GHz, t  = 3.8 mm), and an effective absorption bandwidth (EAB) of 5.3 GHz ( t  = 2.4 mm, 7.44–12.72 GHz). Radar cross-sectional (RCS) simulations were employed to assess the radar stealth effect of the aerogels, revealing that the maximum RCS reduction value of the perfect electric conductor covered by the MXene/C aerogel reaches 12.02 dB m 2 . In addition to the MA performance, the MXene/C aerogel also demonstrates good thermal insulation performance, and a 5-mm-thick aerogel can generate a temperature gradient of over 30 °C at 82 °C. This study provides a feasible design approach for creating lightweight, efficient, and multifunctional MXene-based MA materials.

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251 citations in Web of Science
196 citations in Scopus

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Highly Cited Paper 
Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
Physics, Applied
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