Advances in core—shell engineering of carbon-based composites for electromagnetic wave absorption

Regulated electron migration in sandwich-like m-Ti3C2/Fe3O4 composites derived from electrostatic assembly boosted electromagnetic wave absorption

“…To obtain a high-performance EM wave absorber, the impedance matching value should be close to 1, which means that the EM wave can enter the absorber completely from the vacuum or air. 6,63 The contour map in Fig. 6a shows that the impedance matching value of m-Ti 3 C 2 is far less than 1 in the whole given frequency and thickness range, representing a serious impedance mismatch.…”

Flexible and Ultrathin Graphene/Aramid Nanofiber Carbonizing Films with Nacre-like Structures for Heat-Conducting Electromagnetic Wave Shielding/Absorption

“…With the continuous promotion of portable/wearable electronic devices and electronic communication technologies, the development of efficient electromagnetic interference (EMI) shielding and electromagnetic wave absorption (EWA) materials is urgently needed to ensure the stable performance of electronic devices and protect human health. − Consequently, much effort has been made on developing novel EMI shielding or EWA materials and further enhancing their shielding and absorption capabilities by structural design and hybridization compounding. − In effect, multitudinous electromagnetic materials explored in recent years almost completely fulfill the performance demands and variations, whether shielding or absorption utility. − However, the booming evolution of integrated and miniaturized electronic devices, especially the rise of smart wearable electronics, has put forward some higher demands to EMI shielding and EWA materials. , Both the heat management property and flexibility have also become two indispensable important features that should be considered simultaneously in designing electromagnetic materials. − …”

Nickel nanoparticle decorated N-doped carbon nanofibers for light weight and high-efficiency microwave absorption

“…For example, a core-shell configuration consisting of a magnetic metal core and a carbon shell has aroused extensive attention owing to its features of not only protecting effectively the metal core from oxidation and corrosion but also constructing more heterointerfaces to enhance the interfacial polarization and associated relaxation of the composites. 28 In this study, Ni@CNFs were synthesized via a facile electrospinning method combined with a subsequent thermal treatment process, in which the in situ formed Ni NPs are dispersed homogeneously in the CNFs during carbonization. The influence of the Ni content on the microwave absorption properties of Ni@CNFs is investigated in detail in the frequency range of 2-18 GHz.…”