General strategy for fabrication of N-doped carbon nanotube/reduced graphene oxide aerogels for dissipation and conversion of electromagnetic energy

Abstract

Lightweight N-doped CNT/rGO aerogels show excellent electromagnetic energy dissipation performance and the heat energy converted from electromagnetic energy exceeds 20%.

Heterointerface Engineering in Electromagnetic Absorbers: New Insights and Opportunities

“…Despite the great achievements, 0D core–shell structure remains some shortcomings, such as high electrical percolation threshold and lack of shape anisotropy. Fortunately, 1D core–shell structures well retain the advantageous characteristics of 0D core–shell structures, and their high aspect ratio nature allows them to overlap each other to build a conductive network, even at low filler concentration, [ 112 ] which meets the need for lightweight EM absorbers. The assembly strategies of 1D core–shell structure can be roughly divided into two categories: polymer polymerization and atomic layer deposition (ALD).…”

“…Zhu and co‐workers proposed a general strategy to develop a series of N‐doped CNTs/rGO aerogels. [ 112a,147 ] The unique metal@graphene core–shell nanostructures and interconnected N‐doped CNTs made these aerogels display excellent MA performance at low thickness and filler ratio.…”

Ni Doping in MnO2/MXene (Ti3C2Tx) Composites to Modulate the Oxygen Vacancies for Boosting Microwave Absorption

“…The electromagnetic attenuation of dielectric materials depends mainly on dielectric losses, which in general include various polarization losses and conductive loss . According to the Debye theory, ε″ represents the capability of dielectric attenuation, which can be expressed as where ω is the angular frequency, ε s is the static dielectric constant, τ is the polarization relaxation time, ε ∞ is the high-frequency relative dielectric constant, and σ is the conductivity.…”

Magnetically driven hierarchically ordered carbonyl iron@SiO2/Ni@Ag/silicone rubber composite film for enhanced electromagnetic interference shielding with ultralow reflection

“…, Fe, Co, Ni). 33,34 Among them, CI microparticles stand out due to their excellent magnetization properties and easy large-scale preparation. To broaden the effective absorption band of CI microparticles, SiO 2 nanoparticles could be coated on their surfaces to endow them strong dielectric loss and good chemical stability.…”

“…In general, good magnetism is a prerequisite for microparticles to serve as EMW absorbers, such as ferrites (e.g., CoFe 2 O 4 , Fe 3 O 4 ), 30,31 carbonyl iron (CI), 32 and metals (e.g., Fe, Co, Ni). 33,34 Among them, CI microparticles stand out due to their excellent magnetization properties and easy large-scale preparation. To broaden the effective absorption band of CI microparticles, SiO 2 nanoparticles could be coated on their surfaces to endow them strong dielectric loss and good chemical stability.…”