Bimetallic Hybridization Induced Multi-polarization Loss in Multiphase Solid Solution for Electromagnetic Wave Absorption

Abstract

Aiming at the polarization loss bottleneck in electromagnetic wave (EMW) absorbing materials, we propose a new bimetallic hybrid strategy towards multiphase solid solutions to increase multiple polarization losses. Assisted by polydopamine (PDA) as crystalline phase inducer, Mo/W substances were anchored in situ on carbon networks. As a result, a carbon-supported MoC_1–x/WC/W₂C/WC_1–x heterostructure was formed. This process leads to Mo migration and W occupying vacancies, resulting in vacancy/substitution defects. Simultaneously, Li⁺ is inserted into the solid solution to form an interstitial structure. Due to the synergistic effect of multiple polarization losses, the Mo2W-900 solid solution achieved excellent EMW absorption performance. The minimum reflection loss (RL_min) at a thickness of 2.5 mm is –65.92 dB, and it has a maximum effective absorption bandwidth (EAB_max) of 6.16 GHz at only 2.1 mm. This paper establishes a new type of multi-loss polarization model for solid-solution absorbers, providing important theoretical guidance for the design of the next generation of hybrid absorbers.

Keywords

Multiphase solid solution / Multi-polarization loss / Bimetallic hybridization / Electromagnetic wave absorption / Carbides / Intercalations / Density functional calculations / Impedance matching

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2026 SIOC, CAS, Shanghai, & WILEY-VCH GmbH