Hierarchical carbon nanotubes@Ni/C foams for high-performance microwave absorption

An ultralight and thermally conductive Ti3C2TxMXene–silver nanowire cellular composite film for high-performance electromagnetic interference shielding

“…[1][2][3] For these problems, the corresponding electromagnetic shielding materials are needed to ensure the safety of human health and information. Through continuous exploration of electromagnetic shielding materials, researchers have found that various materials with high electromagnetic interference shielding efficiency (EMI SE) 4,5 and excellent microwave absorption [6][7][8] can effectively resolve the above issues. The electromagnetic shielding materials with the absorption shielding mechanism convert electromagnetic energy into heat dissipation, thereby effectively avoiding secondary pollution after reflecting electromagnetic waves.…”

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

“…), the ε ′′ value is related to σ. 33 Thus, S1 and S2 with lower Ni contents construct larger 3D conductive networks compared to S3, as confirmed by their ε ′′ values. Essentially, the lower σ value of S3 is attributed to the higher content and bigger size of Ni grains dispersed in S3 compared to S1 and S2, which hinders the production of 3D conductive networks in CNFs because Ni grains turn into barriers for electron transport when electrons migrate on the surface of CNFs.…”

“…As reported in previous studies, the high catalytic graphitization activity of Ni NPs contributes to the growth of CNTs, resulting in the emergence of protrusions on the CNF matrix. 32–34 Such nano-protrusions are beneficial for generating more hetero-interfaces and enhancing the interfacial polarization relaxation, thereby facilitating the dissipation of electromagnetic energy. 33,35…”

“…32–34 Such nano-protrusions are beneficial for generating more hetero-interfaces and enhancing the interfacial polarization relaxation, thereby facilitating the dissipation of electromagnetic energy. 33,35…”

“…[32][33][34] Such nano-protrusions are beneficial for generating more hetero-interfaces and enhancing the interfacial polarization relaxation, thereby facilitating the dissipation of electromagnetic energy. 33,35 The typical TEM images of Ni@CNFs (Fig. 3a-c) confirm that Ni NPs are wrapped in CNFs or anchored on their surfaces.…”