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<p>Despite its high conductivity and lightweight properties, carbon black (CB) suffers from insufficient electromagnetic wave (EMW) dissipation and severe particle agglomeration, limiting its performance in advanced microwave absorption applications. To overcome these challenges, we developed a methylammonium lead iodide perovskite (MAPbI<sub>3</sub>)/CB composite system featuring micron-structured MAPbI<sub>3</sub> frameworks via a simple milling process. The micrometer-scale MAPbI<sub>3</sub> acts as a scaffold, effectively suppressing CB aggregation while simultaneously optimizing dielectric loss and impedance matching. This synergistic design enhances microwave absorption performance by improving EMW attenuation and broadening the effective absorption bandwidth (EAB). At a filling mass of 24 wt.%, the MCB-16/8 composite with CB fixed at 8 wt.% and MAPbI<sub>3</sub> share of 16 wt.% exhibits excellent EAB absorption properties, with an EAB reaching a wide absorption of 5.44&#xa0;GHz at 2.05&#xa0;mm and a minimum reflection loss as low as −64.22&#xa0;dB at 2.3&#xa0;mm. Also, the simulation results show the power loss density distribution within the MCB-16/8 and confirm a significant reduction of the radar cross-section (RCS), with excellent agreement between simulation and experimental data. This study presents a novel approach to address the agglomeration of carbon-based materials by constructing a micron-nanometer step heterostructure, offering an effective pathway for developing high-performance EMW absorption composites.</p> Graphical Abstract <p></p>

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Micron-architected MAPbI3 perovskite frameworks suppressing carbon black aggregation for dielectric loss and impedance matching synergistic microwave absorption

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Xueying Zhao,
  • Peng Tang,
  • Guohua Wu,
  • Mang Li,
  • Jiawei Du,
  • Xuyang Zhang,
  • Nana Liu,
  • Bo Wang,
  • Yaohong Zhang,
  • Xiangwei Wang

摘要

Despite its high conductivity and lightweight properties, carbon black (CB) suffers from insufficient electromagnetic wave (EMW) dissipation and severe particle agglomeration, limiting its performance in advanced microwave absorption applications. To overcome these challenges, we developed a methylammonium lead iodide perovskite (MAPbI3)/CB composite system featuring micron-structured MAPbI3 frameworks via a simple milling process. The micrometer-scale MAPbI3 acts as a scaffold, effectively suppressing CB aggregation while simultaneously optimizing dielectric loss and impedance matching. This synergistic design enhances microwave absorption performance by improving EMW attenuation and broadening the effective absorption bandwidth (EAB). At a filling mass of 24 wt.%, the MCB-16/8 composite with CB fixed at 8 wt.% and MAPbI3 share of 16 wt.% exhibits excellent EAB absorption properties, with an EAB reaching a wide absorption of 5.44 GHz at 2.05 mm and a minimum reflection loss as low as −64.22 dB at 2.3 mm. Also, the simulation results show the power loss density distribution within the MCB-16/8 and confirm a significant reduction of the radar cross-section (RCS), with excellent agreement between simulation and experimental data. This study presents a novel approach to address the agglomeration of carbon-based materials by constructing a micron-nanometer step heterostructure, offering an effective pathway for developing high-performance EMW absorption composites.

Graphical Abstract