Graphene aerogels (GAs) exhibits immense potential in the field of electromagnetic interference (EMI) shielding due to their ultralow density, inherent conductive network, and porous structure. However, the optimization of structure and conductivity of GAs remains a significant challenge. To address this issue, a double template method was utilized to regulate the structure of graphene aerogel, resulting in a well-ordered hierarchical architecture. Subsequently, MXene was deposited on the surface of GA-1 through an immersion method to enhance the conductivity. The as-prepared MXene/graphene composite aerogel (MGA-10) showed excellent compression properties with ultra-high specific stress of 9.6 kPa cm mg at 80% strain. Besides, due to the unique structure, the GA-x/epoxy composite (GA-x/EP) demonstrated excellent EMI shielding performances of more than 45 dB in both the C-band and X-band. The increase in conductivity and the introduction of new interfaces caused by MXene deposition further improved the EMI properties of MGAs/EP. After 10 times of deposition, MGA-10/EP displayed an impressive EMI performance above 68 dB in both the C-band and X-band. Moreover, MGA-10/EP exhibited excellent photothermal conversion performance, making it highly suitable for applications such as anti-icing and deicing. This work provides a valuable idea for designing efficient EMI materials.

中文翻译：

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多层结构MXene/石墨烯气凝胶增强环氧树脂复合材料的电磁干扰屏蔽

石墨烯气凝胶（GA）由于其超低密度、固有的导电网络和多孔结构，在电磁干扰（EMI）屏蔽领域展现出巨大的潜力。然而，GA 的结构和电导率的优化仍然是一个重大挑战。为了解决这个问题，采用双模板方法来调节石墨烯气凝胶的结构，从而形成有序的分层结构。随后，通过浸泡的方法在GA-1表面沉积MXene以增强导电性。所制备的 MXene/石墨烯复合气凝胶 (MGA-10) 显示出优异的压缩性能，在 80% 应变下具有 9.6 kPa cm mg 的超高比应力。此外，由于其独特的结构，GA-x/环氧树脂复合材料（GA-x/EP）在C波段和X波段均表现出超过45 dB的优异EMI屏蔽性能。MXene 沉积引起的电导率增加和新界面的引入进一步改善了 MGA/EP 的 EMI 特性。经过 10 次沉积后，MGA-10/EP 在 C 频段和 X 频段均表现出超过 68 dB 的令人印象深刻的 EMI 性能。此外，MGA-10/EP表现出优异的光热转换性能，使其非常适合防冰和除冰等应用。这项工作为设计高效 EMI 材料提供了宝贵的想法。