Rational construction of magnetic core-shell structural carbon Nanotubes@Mesoporous N-doped carbon nanofibers for efficient microwave absorption

Joule-Heating-Driven Synthesis of a Honeycomb-Like Porous Carbon Nanofiber/High Entropy Alloy Composite as an Ultralightweight Electromagnetic Wave Absorber

“…Subsequently, we aimed to compare this with other previously reported HEA-based and CNF-based absorbers. As shown in Figure k, HCNF/HEA exhibits more excellent EMW absorption properties and lower filling ratios than most of the previously reported counterparts, ,,− ,,,− proving that HCNF/HEA is promising as a highly efficient and lightweight EMW absorber for practical applications.…”

“…Integrating metal and carbon components has led to favorable physical, optical, and electrical properties that can enhance EMW absorption performance . Therefore, incorporating well-dispersed magnetic nanoparticles of HEA into the carbon matrix can broaden the absorption bandwidth and reduce the overall density without sacrificing absorption strength. , As the star of the carbon material family, a carbon nanofiber (CNF) made from electrostatically spun polymer fibers has distinctive features in terms of a porous structure, high surface area, high electrical conductivity, and low manufacturing cost, generating considerable interest in EMW absorption research. − Electrospun polymer fibers are an excellent structural substrate for facilitating the uniform dispersion of metal ion precursors, achieving a homogeneous distribution of nanoparticles within the CNF matrix. Apart from matching the constituent components, the rational design of a suitable porous structure CNF is proven to be an efficient strategy for inducing interfacial polarization and generating multiple interfaces and numerous voids that effectively scatter EMW effectively.…”

Preparation of MoS2/MXene/NC Porous Composite Microspheres with Wrinkled Surface and Their Microwave Absorption Performances

“…Figure D shows the impedance matching | Z in / Z 0 | versus frequency variation curves. In the 4–8 GHz range, MoS 2 /MXene/NC composite microspheres had more regions, with values approaching 1, indicating that the electromagnetic waves in this range were entirely entering to the interior of the material. − …”

Boron Nitride- and Carbon Nanotube-Bridged Interfaces for Boosting Thermal Conduction and Electromagnetic Wave Absorption

“…15,16 evidenced that compounding CNTs with dielectric or magnetic components can effectively address impedance matching and attenuation capabilities, thereby enhancing EWA performances. 17,18 Therefore, a reasonable selection of dielectric and magnetic materials with high thermal conductivity can adjust the EWA performance of CNTs, while also ensuring good thermal conductivity of composites. 19 Hexagonal boron nitride (h-BN) has attracted great attention due to its 2D layered hexagonal honeycomb structure and excellent properties, such as outstanding chemical and thermal stability and mechanical strength, good electric insulation, and ultrahigh thermal conductivity, making it a promising functional filler candidate for polymer-based thermal management materials.…”

“…Although constructing a heat flux pathway by blending polymer with CNTs can obtain high thermal conductivity, the high conductivity of CNTs often lead to the reflection rather than absorption of most EWs . Meanwhile, the single loss mechanism of pure CNTs is also a main obstacle to hinder their EWA performance. , It is evidenced that compounding CNTs with dielectric or magnetic components can effectively address impedance matching and attenuation capabilities, thereby enhancing EWA performances. , Therefore, a reasonable selection of dielectric and magnetic materials with high thermal conductivity can adjust the EWA performance of CNTs, while also ensuring good thermal conductivity of composites …”