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Chinese Journal of Materials Research  2025, Vol. 39 Issue (4): 289-295    DOI: 10.11901/1005.3093.2024.403
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Electromagnetic Shielding Performance of MXene@Carbon Fiber Felt Composite Films
SUN Bo1, ZHANG Tianyu2,3, ZHAO Qiangqiang2,3, WANG Han2,3, TONG Yu1(), ZENG You2,3()
1.School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China
2.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
Cite this article: 

SUN Bo, ZHANG Tianyu, ZHAO Qiangqiang, WANG Han, TONG Yu, ZENG You. Electromagnetic Shielding Performance of MXene@Carbon Fiber Felt Composite Films. Chinese Journal of Materials Research, 2025, 39(4): 289-295.

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Abstract  

Development of lightweight, flexible, and high-efficiency electromagnetic shielding films is urgently required for practical application for wearable devices, thin-film electronics, and miniaturized equipment. In order to significantly enhance the electrical conductivity and electromagnetic shielding effectiveness (EMI SE) of carbon fiber felts (CFFs), MXene nanosheets were well dispersed in ethanol aqueous solutions and then spray-deposited onto CFF surfaces to fabricate MXene@CFF composite films. The effect of MXene deposition on the micromorphology, electrical conductivity and EMI SE of the composite films was investigated in detail. The results showed that the incorporation of MXene could significantly improve the EMI shielding performance. The surface electrical resistivity of the composite films with 2.37% (mass fraction) MXene decreased from 9.3 Ω/sq to 2.7 Ω/sq, while the EMI SE in the range of 8.2~12.4 GHz (X-band) increased to 57.9 dB, increasing by 27.8% in comparison with that of the bare CFFs. This performance improvement may mainly be attributed to the enhanced electrical conductivity of MXene-coated CFFs, the hierarchical porous structure, and the increased multiple reflection and absorption at multi-component interfaces.
Key words:  composite      electromagnetic shielding performance      electrical conductivity      MXene      carbon fiber felt     
Received:  30 September 2024     
ZTFLH:  TB332  
Fund: National Natural Science Foundation of China(52472056);National Natural Science Foundation of China(52130209);Applied Basic Research Program of Liaoning Province(2023JH26/10300015);Liaoning Natural Science Foundation(22-KF-12-04);Opening Foundation of Shanxi Key Laboratory of Nano & Functional Composite Materials(NFCM202102);Shenyang Science and Technology Project(22-316-1-04)
Corresponding Authors:  ZENG You, Tel: (024)83978090, E-mail: yzeng@imr.ac.cn;
TONG Yu, Tel: (024)24690300, E-mail: tong_yu123@hotmail.com
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SUN Bo
ZHANG Tianyu
ZHAO Qiangqiang
WANG Han
TONG Yu
ZENG You

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https://www.cjmr.org/EN/10.11901/1005.3093.2024.403     OR     https://www.cjmr.org/EN/Y2025/V39/I4/289

Fig.1  Fabrication schematics (a), SEM (b), XRD (c), and EDS images (d, e) of the MXene@CFF composite films
Fig.2  SEM images of MXene@CFF composite films with MXene loadings of 0 (a), 0.82% (b), 1.22% (c), and 2.37% (d)
Fig.3  Surface electrical resistivity of MXene@CFF composite films
Fig.4  Total (a), reflection (b), and absorption (c) shielding effectiveness, and the corresponding reflection and absorption coefficients (d) of MXene@CFF composite films in the range of 8.2~12.4 GHz
Fig.5  Mechanism schematics on electromagnetic shielding of MXene@CFF composite films
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