Progress in percolative composites with negative permittivity for applications in electromagnetic interference shielding and capacitors

Leng, Zhong; Yang, Zhenyu; Tang, Xinxue; Helal, Mohamed H.; Qu, Yunpeng; Xie, Peitao; El-Bahy, Zeinhom M.; Meng, Shuwei; Ibrahim, Mohamed M.; Yu, Changyou; Algadi, Hassan; Liu, Chunzhao; Liu, Yao

doi:10.1007/s42114-023-00778-2

Cited by 40 publications

(6 citation statements)

References 151 publications

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“…Furthermore, it is worthwhile to notice that the μ″ values of the control group are negative at 12-18 GHz, which is one of the special performances of electromagnetic metamaterials, meaning the acquired nanocomposites may have potentials as a building block in metamaterials. 30,32 In order to further investigate the polarization behavior of the MAM, Cole-Cole curves are carried out, as depicted in Fig. 8.…”

Section: Resultsmentioning

confidence: 99%

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Bi,

Dai,

et al. 2024

ECS J. Solid State Sci. Technol.

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High-performance and cost-effective microwave absorbing materials are of vital importance in not only military but also civil fields. Here, an in-situ generation-carbonization one-step method is proposed to synthesize excellent absorbents based on a common solid waste, willow catkins. The results demonstrate that the microwave absorption performance has been successfully improved owing to the magnetic particles, the core-shell nanoparticles, and the hierarchical porous structure, which results in strong conductivity loss, dielectric loss, magnetic loss, interface polarization, and multiple scattering. The maximum reflection loss (RLmax) reaches up to -50.66 dB and -49.09 dB, respectively, at 16.6 and 17.1 GHz with the thickness of 1.65 mm, resulting in double-peak absorption. What’s more, the effective absorption bandwidth (EAB, RL<−10 dB) can get up to 5.7 GHz (from 12.4 to 18 GHz) with the thickness of 1.84 mm. Great absorption performance can be obtained simply through impregnation and carbonization, which constructs a fruitful and cost-effective paradigm for resource utilization of solid waste such as willow catkins.

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Section: Resultsmentioning

confidence: 99%

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Bi,

Dai,

et al. 2024

ECS J. Solid State Sci. Technol.

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“…The incompatibility of conventional anti-icing/deicing measures with the requisite radar wave transmissivity of aircraft is a problem that currently demands an urgent solution. Electrically heated films composed of electromagnetic shielding materials such as MXenes and graphene are commonly employed to address deicing issues. − However, MXenes are relatively expensive, rendering them unsuitable for large-scale application. Traditional graphene electric heating films, characterized by their minimal mass (with film thicknesses attainable down to the order of tens of micrometers) and superior heating efficiency, are prevalently employed for deicing applications. − Nonetheless, this methodology predominantly relinquishes electromagnetic wave transmission capabilities to secure effective deicing outcomes. , Frequency Selective Surfaces (FSSs) have been extensively applied in the realm of wave-transmissive materials in recent years. , Through intricate pattern design that leverages their selective transmission properties, films with both heating and wave-transmission capabilities can be fabricated.…”

Section: Introductionmentioning

confidence: 99%

A Tri-Layer Structural Film Containing Nickel Nanocoating for Electromagnetic Transmittance and Joule Heating

Zhao,

Xu,

et al. 2024

ACS Appl. Nano Mater.

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In the realm of military applications, the effective management of ice accumulation on strategic equipment without compromising the integrity of the electromagnetic signal transmission is a perennial challenge. To confront this issue, a revolutionary trilayered material composite known as MPE (metal-polyimide-electric heating layer) has been developed, demonstrating a sophisticated balance between deicing functionality and electromagnetic transparency. The MPE composite is ingeniously architected in a trilayer configuration, comprising a frequency-selective wave-transmissive stratum, an interjacent insulating dielectric interlayer, and an electric heating layer. The former is the result of a pioneering surface grafting modality of keratin, subsequently metallized with a nickel (Ni) coat via a chemical plating technique, which concurrently imparts the composite with a temperature-sensitivity range between −10 and 80 °C. The latter is formulated from a cyanate ester (CE) resin with organic conductive fillers, endowing the material with a high thermal threshold of up to 220 °C. Experimental evaluations of the MPE material have yielded a remarkable 88% transmissivity at the designated resonant frequency, a significant improvement over traditional graphene heating layer. This high level of performance, combined with the material's inherent deicing properties and the capacity for remote control via integrated sensing technology, positions the MPE as a substantial breakthrough for military operations.

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“…2). 20–22 According to the type of functional phase, metacomposites are divided into metal-based, polymer-based and carbon-based metacomposites (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

“…Hence, focusing on the challenges of existing carbon-based metacomposites, such as high dielectric loss, relatively single function and unsystematic synthesis method, 20 we analyzed the design methods, regulation strategies and fundamental models of carbon-based metacomposites in detail. In this review, the regulation strategy is mainly discussed in the following three parts: composition regulation, structure regulation, and interface and defect engineering.…”

Section: Introductionmentioning

confidence: 99%

Strategies for the effective design and regulation of carbon-based metacomposites: a review

Li,

Guo,

Sun

et al. 2024

J. Mater. Chem. C

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Progress in percolative composites with negative permittivity for applications in electromagnetic interference shielding and capacitors

Cited by 40 publications

References 151 publications

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

A Tri-Layer Structural Film Containing Nickel Nanocoating for Electromagnetic Transmittance and Joule Heating

Strategies for the effective design and regulation of carbon-based metacomposites: a review

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