Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Zhao, Rongzhi; Gao, Tong; Li, Yixing; Sun, Zhuo; Zhang, Zhengyu; Ji, Lianze; Hu, Chenglong; Liu, Xiaolian; Zhang, Zhenhua; Zhang, Xuefeng; Qin, Gaowu

doi:10.1038/s41467-024-45815-w

Cited by 39 publications

(1 citation statement)

References 54 publications

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“…Flourishing development of wireless communication technology has inevitably grown electromagnetic (EM) wave pollution in the GHz band. − To cater to the demands of the military and civilians, the development of EM wave-absorbing (EMA) materials with excellent performance through multifarious attenuation mechanisms has become vitally important. Notably, the appropriate impedance matching permits more EM waves to enter the material and the attenuation constant indicates the ability to dissipate EM waves has been emphasized in the reported EMA materials, which are two significant factors affecting the EMA materials. − For instance, Sun et al reported Ti 3 C 2 MXene/TiO 2 nanosheets that can improve the EMA properties, ascribed to the effective amelioration of the imperfect impedance match and the inferior attenuation constant .…”

Section: Introductionmentioning

confidence: 99%

V-Based MXene/MAX Heterostructure Composites with Enhancing Dielectric Loss for Broadband Microwave Absorption

Cui,

Li,

Zhang

et al. 2024

Inorg. Chem.

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Electromagnetic wave absorption performance is strictly dependent on attenuation and impedance matching, which are directly influenced by the ratio of MXene/MAX in the multilayer structured MXene/MAX composites. However, there is still a challenge to achieve collaborative optimization of dielectric loss and impedance matching by precisely regulating the proportional relationship of MXene/MAX. Herein, V-based MXene/MAX heterostructure composites with different V 2 C/V 2 AlC ratios were successfully synthesized by rationally controlling the temperature and time of the hydrothermal reaction. Experimental results indicated that V 2 C-100 °C-1 harvested the balance between reduced impedance matching and enhanced dielectric losses, which was attributed to the mildly enhanced conduction loss and polarization loss. The first principles indicated that abundant electrons migrate from the V atoms of the MXene to the C atoms of the MAX phase. The charge redistributed and accumulated at the interface, exciting the increase in the dielectric loss of V 2 C-100 °C-1. As a result, the V 2 C-100 °C-1 heterostructure composite had an excellent electromagnetic absorption effect with a minimum reflection loss of −50.06 dB and a wide effective absorption bandwidth of 4.0 . This work provides a valuable experience for the development of efficient MXene-based microwave absorbing materials.

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Section: Introductionmentioning

confidence: 99%

V-Based MXene/MAX Heterostructure Composites with Enhancing Dielectric Loss for Broadband Microwave Absorption

Cui,

Li,

Zhang

et al. 2024

Inorg. Chem.

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Molecular Intercalation‐Induced Two‐Phase Evolution Engineering of 1T and 2H‐MS₂(M = Mo, V, W) for Interface‐Polarization‐Enhanced Electromagnetic Absorbers

Jia,

Liu,

Gao

et al. 2024

Adv Funct Materials

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Polarization at interfaces is an important loss mechanism for electromagnetic wave (EMW) attenuation, though the motion behavior of carriers in interfaces composed of different types of conductors has yet to be investigated. Tuning the phase structure of transition metal dichalcogenides (TMDs) MS2 (M = Mo, V, W) by organics small molecule intercalation to achieve the modulation of interfacial types is an effective strategy, where 1T‐MS2 exhibits metallic properties and 2H‐MS2 has semiconducting properties. To exclude the contribution of the intrinsic properties of TMDs materials, three TMDs (MoS2, VS2, and WS2), which also possess phase transitions, are investigated. Among them, the 1T‐MS2 composite exhibits excellent EMW absorption performance under the synergistic effect of interfacial polarization and conduction loss. 1T‐MoS2/MOF‐A exhibits the best EMW absorption performance with an RLmin of −61.07 dB at a thickness of 3.0 mm and an EAB of 7.2 GHz at 2.3 mm. The effectiveness of the modulation of the interfacial polarization using 1T‐phase and 2H‐phase MS2 is demonstrated, which is important for the analysis of the carrier motion behavior during the interfacial loss.

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Mechanically Robust and Thermal Insulating Nanofiber Elastomer for Hydrophobic, Corrosion‐Resistant, and Flexible Multifunctional Electromagnetic Wave Absorbers

Xiao,

Zhan,

et al. 2024

Adv Funct Materials

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Multifunctionalization of electromagnetic wave absorbing materials (EMWAMs) presents a promising avenue for their application in complex scenarios. However, the effective integration of multiple supplementary functions into EMWAMs continues to pose a significant challenge. Herein, a novel nanofiber elastomer (NFE) incorporating multicomponent inorganic FeS2/S,N co‐doped carbon nanofibers (NFs) and organic component (Ecoflex) are designed and synthesized. The sulfur doping ratios and species can be effectively modulated via controlling the amount of sulfur and sulfurization temperature. The optimized FeS2/S,N co‐doped carbon NFs/Ecoflex NFE not only exerted an excellent impedance matching characteristic, but also displays boosted conductive loss and polarization loss capacities. Amongst, the designed NFE achieved an ultra‐wide effective absorption bandwidth (EAB) of 7.40 GHz and minimum reflection loss (RLmin) of −21.82 dB at the thin matching thickness (≈2.00 mm). Furthermore, FeS2/S,N co‐doped carbon NFs/Ecoflex NFE simultaneously presents greatly improved mechanical property, thermal insulation, hydrophobicity, and corrosion resistance. Through designing metastructures, the NFE with a periodically closed‐ring resonant structure realized an EAB of 32.64 GHz (ranging from 7.36 to 40.00 GHz). Overall, this research contributes valuable insights for the design of next‐generation EMWAMs with satisfactory multifunctionalities, demonstrating their significant potential for application in smart devices and challenging environments.

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Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Cited by 39 publications

References 54 publications

V-Based MXene/MAX Heterostructure Composites with Enhancing Dielectric Loss for Broadband Microwave Absorption

V-Based MXene/MAX Heterostructure Composites with Enhancing Dielectric Loss for Broadband Microwave Absorption

Molecular Intercalation‐Induced Two‐Phase Evolution Engineering of 1T and 2H‐MS₂(M = Mo, V, W) for Interface‐Polarization‐Enhanced Electromagnetic Absorbers

Mechanically Robust and Thermal Insulating Nanofiber Elastomer for Hydrophobic, Corrosion‐Resistant, and Flexible Multifunctional Electromagnetic Wave Absorbers

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Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Cited by 39 publications

References 54 publications

V-Based MXene/MAX Heterostructure Composites with Enhancing Dielectric Loss for Broadband Microwave Absorption

V-Based MXene/MAX Heterostructure Composites with Enhancing Dielectric Loss for Broadband Microwave Absorption

Molecular Intercalation‐Induced Two‐Phase Evolution Engineering of 1T and 2H‐MS2(M = Mo, V, W) for Interface‐Polarization‐Enhanced Electromagnetic Absorbers

Mechanically Robust and Thermal Insulating Nanofiber Elastomer for Hydrophobic, Corrosion‐Resistant, and Flexible Multifunctional Electromagnetic Wave Absorbers

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Molecular Intercalation‐Induced Two‐Phase Evolution Engineering of 1T and 2H‐MS₂(M = Mo, V, W) for Interface‐Polarization‐Enhanced Electromagnetic Absorbers