@article{bc460ba2cf564396a0eead7ea23eedd3,
title = "Ultralight and Mechanically Robust Ti3C2T x Hybrid Aerogel Reinforced by Carbon Nanotubes for Electromagnetic Interference Shielding",
abstract = "Lightweight materials with high electrical conductivity and robust mechanical properties are highly desirable for electromagnetic interference (EMI) shielding in modern portable and highly integrated electronics. Herein, a three-dimensional (3D) porous Ti3C2Tx/carbon nanotube (CNT) hybrid aerogel was fabricated via a bidirectional freezing method for lightweight EMI shielding application. The synergism of the lamellar and porous structure of the MXene/CNT hybrid aerogels contributed extensively to their excellent electrical conductivity (9.43 S cm-1) and superior electromagnetic shielding effectiveness (EMI SE) value of 103.9 dB at 3 mm thickness at the X-band frequency, the latter of which is the best value reported for synthetic porous nanomaterials. The CNT reinforcement in the MXene/CNT hybrid aerogels enhanced the mechanical robustness and increased the compressional modulus by 9661% relative to that of the pristine MXene aerogel. The hybrid aerogel with high electrical conductivity, good mechanical strength, and superior EMI shielding performance is a promising material for inhibiting EMI pollution.",
keywords = "MXene, carbon nanotube, electromagnetic wave shielding, hybrid aerogel, three-dimensional foam",
author = "Pradeep Sambyal and Aamir Iqbal and Junpyo Hong and Hyerim Kim and Kim, {Myung Ki} and Hong, {Soon Man} and Meikang Han and Yury Gogotsi and Koo, {Chong Min}",
note = "Funding Information: Figure 7 shows the proposed mechanism for EMI shielding by the MXCNT hybrid aerogels. When the incident EM waves hit the surface of the conventional shielding material, some of the waves are reflected, absorbed, and transmitted. The astonishing EMI shielding performance of the MXCNT hybrid aerogels is attributed to the 3D porous lamellar network, which significantly improves the contribution of the SE A to the SE T . When EM passes through the aerogel, it experiences multiple reflections and multiple scattering within the microporous cellular framework of the CNT-reinforced MXene slabs supported by vertical pillars. (19) Moreover, formation of the aligned structure in the aerogels provides a conductive pathway for electron transport or migration, which leads to conduction losses. (11,12,28) The attenuation of the EM waves is a combined result of dipolar and interfacial polarization, arising from the MXene surface terminations (OH, O, and F), localized defects, and accumulation of charge at the heterogeneous interfaces between the MXene and CNTs. (38,39) These results demonstrate that the MXCNT hybrid aerogel is a prospectively effective material for lightweight EMI shielding application. ",
year = "2019",
month = oct,
day = "16",
doi = "10.1021/acsami.9b12550",
language = "English",
volume = "11",
pages = "38046--38054",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "41",
}