Magnetic Interacted Interaction Effect in MXene Skeleton: Enhanced Thermal‐Generation for Electromagnetic Interference Shielding

Abstract

With the rapid advancements of portable and wearable equipment, high‐efficiency electromagnetic interference (EMI) shielding materials are highly entailed to eliminate radiated electromagnetic pollution. Herein, by assembling hexagonal SrFe12O19 flakes into a Ti3C2Tx MXene/MWCNT substrate, a magnetized Ti3C2Tx‐based film is successfully fabricated by a facile filtration approach. Carbon nanotubes are used as isolation agents to realize the submicroscopic dispersion of MXene and SrFe12O19. The obtained MXene/MWCNTs/SrFe12O19 film shows a high electrical conductivity of 438 S cm−1 and an excellent EMI shielding effectiveness of 62.9 dB in X‐band at a thickness of only 40 µm. Benefiting from a strong magnetic response ability and an expanded magnetic coupling space, hexagonal SrFe12O19 sheets can efficiently consume incident magnetic field energy by domain wall migration and the ferromagnetic resonance effect. Boosted EMI shielding performance can be achieved by improving the magnetic loss in the Ti3C2Tx MXene/MWCNTs/SrFe12O19 film, preventing the secondary reflection of electromagnetic waves. Meanwhile, magnetized MXene‐based films display the freestanding and flexible features and are suitable for installation in electric devices. It is anticipated that this strategy offers new ideas for designing EMI shielding films and in broadening potential utility of MXene‐based materials.

Bioinspired Carbon Superstructures for Efficient Electromagnetic Shielding

“…Mxene has drawn great interest in the EM shielding field recently due to its excellent conductivity and light weight. 9,10 are difficult to be completely separated. 11 In contrast, carbonbased materials are still an ideal kind of candidate, considering their light weight, environmental friendliness, and high and adjustable conductivity.…”

“…The types and electrical conductivity of conductive polymers are limited, making them translucent to EMWs when used alone. Mxene has drawn great interest in the EM shielding field recently due to its excellent conductivity and light weight. , However, the etching solution required in Mxene preparation contains fluorine ions (F – ), which pose potential harm to the environment and are difficult to be completely separated . In contrast, carbon-based materials are still an ideal kind of candidate, considering their light weight, environmental friendliness, and high and adjustable conductivity. , At present, the bottom-up approach has been a popular fabrication strategy with various carbon materials including graphene, graphite, carbon nanotubes, or carbon fiber of high filling content (more than 90% or even 100%) to construct foam structures or array structures for carbon-based EM shielding materials, where interconnected conductive networks of these carbon nanofillers are formed inside the matrix for effective EMW shielding. − In particular, the array structure has a stable configuration with a uniform cross section along the thickness direction due to the periodic repetition of its constituent units.…”

A “popcorn-making-mimic” strategy for compounding graphene@NiFe2O4 flexible films for exceptionally strong electromagnetic interference shielding and absorption

“…Huang et al prepared MXene/MWCNTs/SrFe 12 O 19 composite lms (438 S cm − 1 ) by mixing the existing SrFe 12 O 19 nano metal oxides with MXene and MWCNTs by vacuum ltration. Although the EMI shielding performance of 62.9 dB was obtained, the electric conductivity decreased by 80% compared with the original MXene (2210 S cm − 1 ) 21 . This can be ascribed to the lack of plethora porous structures and the limited chemical stability of MXene, which put on di culties in compounding with magnetic particles when compared with carbonbased scaffolds.…”

Flexible MXene‐Based Composite Films for Multi‐Spectra Defense in Radar, Infrared and Visible Light Bands

“…[4d] Nevertheless, these materials can achieve almost complete reflection, resulting in severe secondary electromagnetic pollution. [7] As the total SE depends on reflection and absorption, regulating the absorption proportion may contribute substantially to the SE, which is rarely reported. [6] Furthermore, several studies have proposed the potential application of MXene for IR stealth and visible light absorption.…”