Reasonable design of protective multifunctional materials is highly required for the safety protection of devices/personnel from electromagnetic radiation and heat damage in the 5G/6G era. Herein, a simple soaking-annealing route was adopted to carbonize filter paper into 2D interlinked carbon fiber frameworks inlaid with magnetic nanoparticles, and the products were referred to as CF/M/C 2DIFs (M = Co, Ni, or Fe/FeO). The concentration and type of metal ions as well as the annealing temperature of the CF/M/C 2DIFs were controlled to precisely modulate their composition, porosity, and defects. Results show that the CF/Co/C 2DIFs produced under = 600 °C and [Co] = 0.45 mol/L exhibit high thermal conductivity (2.931 ∼ 3.167 W/m·K) at small loads (10 ∼ 30 wt%) owing to not merely the presence of 2D interlinked path for electron/phonon heat co-transfer but the reasonable control of interface/defects for weakening phonon/electron defect/interface scattering. Also, the CF/Co/C 2DIFs can attenuate microwaves over a broad frequency range via dielectric/magnetic dual loss and 2DIFs, which boosts their loss ability and matching performance. The excellent performance in both heat dissipation and EM wave absorption proves that the CF/M/C 2DIFs can be a promising candidate for next-generation electronic packaging materials in heat management, military, and aerospace fields.

中文翻译：

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滤纸衍生的 CF/M/C（M = Co、Ni 或 Fe/Fe3O4）2D 互连框架，具有超宽吸收带、高导热性和出色的电绝缘性

5G/6G时代，对设备/人员免受电磁辐射和热损伤的安全防护，迫切需要合理设计防护多功能材料。本文采用简单的浸泡-退火路线将滤纸碳化成镶嵌有磁性纳米颗粒的二维互连碳纤维框架，产物被称为CF/M/C 2DIFs（M = Co、Ni或Fe/FeO） 。控制金属离子的浓度和类型以及 CF/M/C 2DIF 的退火温度，以精确调节其成分、孔隙率和缺陷。结果表明，在= 600 °C和[Co] = 0.45 mol/L下生产的CF/Co/C 2DIF在小负载（10 ∼ 30 wt%）下表现出高导热率（2.931 ∼ 3.167 W/m·K），因为不仅涉及电子/声子热共传递的二维互连路径的存在，还涉及对界面/缺陷的合理控制，以削弱声子/电子缺陷/界面散射。此外，CF/Co/C 2DIF 可以通过介电/磁性双损耗和 2DIF 在宽频率范围内衰减微波，从而提高其损耗能力和匹配性能。优异的散热和电磁波吸收性能证明CF/M/C 2DIFs可以成为热管理、军事和航空航天领域下一代电子封装材料的有前途的候选材料。