Ultralight MXene-Coated, Interconnected SiCnws Three-Dimensional Lamellar Foams for Efficient Microwave Absorption in the X-Band

Xinliang Li; Xiaowei Yin; Hailong Xu; Meikang Han; Minghang Li; Shuang Liang; Laifei Cheng; Litong Zhang

doi:10.1021/acsami.8b13658

Ultralight MXene-Coated, Interconnected SiCnws Three-Dimensional Lamellar Foams for Efficient Microwave Absorption in the X-Band

Xinliang Li, Xiaowei Yin, Hailong Xu, Meikang Han, Minghang Li, Shuang Liang, Laifei Cheng, Litong Zhang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

210 Scopus citations

Abstract

Two-dimensional (2D) few-layered Ti₃C₂T_X MXene (f-Ti₃C₂T_X) has been proved to be one of the most promising electromagnetic interference (EMI) materials, but its electromagnetic (EM) absorption properties and loss mechanism have not been studied so far. Herein, for the first time, ordered lamellar f-Ti₃C₂T_X/SiCnws hybrid foams with ultralow density are synthesized by a combination of self-assembly and bidirectional freezing processes. The freestanding foams exhibit excellent EM absorption properties superior to most of the current foam-based counterparts. The effective absorption bandwidth is always able to cover the whole X-band, when the sample thicknesses of f-Ti₃C₂T_X/SiCnws hybrid foams distribute in any value between 3.5 and 3.8 mm, and the minimum reflection coefficient reaches -55.7 dB at an ultralow density of only about 0.029 g·cm^-3. The fundamental mechanism associated with optimized impedance matching, enhanced polarization loss, and conductive loss is discussed in detail. Our results evidence that 2D flexible f-Ti₃C₂T_X MXene has great potential in EM absorption field like graphene.

Original language	English
Pages (from-to)	34524-34533
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	10
Issue number	40
DOIs	https://doi.org/10.1021/acsami.8b13658
State	Published - 10 Oct 2018

Keywords

bidirectional freezing
microwave absorption
MXene
SiCnws
ultralight foam

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10.1021/acsami.8b13658

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title = "Ultralight MXene-Coated, Interconnected SiCnws Three-Dimensional Lamellar Foams for Efficient Microwave Absorption in the X-Band",

abstract = "Two-dimensional (2D) few-layered Ti3C2TX MXene (f-Ti3C2TX) has been proved to be one of the most promising electromagnetic interference (EMI) materials, but its electromagnetic (EM) absorption properties and loss mechanism have not been studied so far. Herein, for the first time, ordered lamellar f-Ti3C2TX/SiCnws hybrid foams with ultralow density are synthesized by a combination of self-assembly and bidirectional freezing processes. The freestanding foams exhibit excellent EM absorption properties superior to most of the current foam-based counterparts. The effective absorption bandwidth is always able to cover the whole X-band, when the sample thicknesses of f-Ti3C2TX/SiCnws hybrid foams distribute in any value between 3.5 and 3.8 mm, and the minimum reflection coefficient reaches -55.7 dB at an ultralow density of only about 0.029 g·cm-3. The fundamental mechanism associated with optimized impedance matching, enhanced polarization loss, and conductive loss is discussed in detail. Our results evidence that 2D flexible f-Ti3C2TX MXene has great potential in EM absorption field like graphene.",

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author = "Xinliang Li and Xiaowei Yin and Hailong Xu and Meikang Han and Minghang Li and Shuang Liang and Laifei Cheng and Litong Zhang",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

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T1 - Ultralight MXene-Coated, Interconnected SiCnws Three-Dimensional Lamellar Foams for Efficient Microwave Absorption in the X-Band

AU - Li, Xinliang

AU - Yin, Xiaowei

AU - Xu, Hailong

AU - Han, Meikang

AU - Li, Minghang

AU - Liang, Shuang

AU - Cheng, Laifei

AU - Zhang, Litong

PY - 2018/10/10

Y1 - 2018/10/10

N2 - Two-dimensional (2D) few-layered Ti3C2TX MXene (f-Ti3C2TX) has been proved to be one of the most promising electromagnetic interference (EMI) materials, but its electromagnetic (EM) absorption properties and loss mechanism have not been studied so far. Herein, for the first time, ordered lamellar f-Ti3C2TX/SiCnws hybrid foams with ultralow density are synthesized by a combination of self-assembly and bidirectional freezing processes. The freestanding foams exhibit excellent EM absorption properties superior to most of the current foam-based counterparts. The effective absorption bandwidth is always able to cover the whole X-band, when the sample thicknesses of f-Ti3C2TX/SiCnws hybrid foams distribute in any value between 3.5 and 3.8 mm, and the minimum reflection coefficient reaches -55.7 dB at an ultralow density of only about 0.029 g·cm-3. The fundamental mechanism associated with optimized impedance matching, enhanced polarization loss, and conductive loss is discussed in detail. Our results evidence that 2D flexible f-Ti3C2TX MXene has great potential in EM absorption field like graphene.

AB - Two-dimensional (2D) few-layered Ti3C2TX MXene (f-Ti3C2TX) has been proved to be one of the most promising electromagnetic interference (EMI) materials, but its electromagnetic (EM) absorption properties and loss mechanism have not been studied so far. Herein, for the first time, ordered lamellar f-Ti3C2TX/SiCnws hybrid foams with ultralow density are synthesized by a combination of self-assembly and bidirectional freezing processes. The freestanding foams exhibit excellent EM absorption properties superior to most of the current foam-based counterparts. The effective absorption bandwidth is always able to cover the whole X-band, when the sample thicknesses of f-Ti3C2TX/SiCnws hybrid foams distribute in any value between 3.5 and 3.8 mm, and the minimum reflection coefficient reaches -55.7 dB at an ultralow density of only about 0.029 g·cm-3. The fundamental mechanism associated with optimized impedance matching, enhanced polarization loss, and conductive loss is discussed in detail. Our results evidence that 2D flexible f-Ti3C2TX MXene has great potential in EM absorption field like graphene.

KW - bidirectional freezing

KW - microwave absorption

KW - MXene

KW - SiCnws

KW - ultralight foam

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Ultralight MXene-Coated, Interconnected SiCnws Three-Dimensional Lamellar Foams for Efficient Microwave Absorption in the X-Band

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