Endowing electromagnetic interference (EMI) shielding foams with ultralow density and dynamic stable structure is crucial yet challenging. Here, we propose a facile one-step thermal treatment strategy to fabricate lightweight silver/reduced graphene oxide-coated carbonized melamine (CMF/rGO/Ag) hybrid foams with remarkable mechanical performance and outstanding EMI shielding effectiveness (EMI SE). Due to interfacial reinforcement of rGO between CMF skeleton and silver, the CMF/rGO/Ag foams show outstanding structural stability after 1000 cycles of a loading-unloading compression test. Moreover, The EMI SE of the foams reaches 50.6 dB at a mere density of 16 mg cm⁻³. The normalized surface-specific SE is up to 7616 dB cm² g⁻¹ with an ultralow Ag content of 0.09 vol%. Interestingly, the collaboration of the porous skeleton and multiple interfaces contribute to an anomalous high absorption coefficient of CMF/rGO/Ag foams (over 0.5). The high-absorption-coefficient shielding mechanism of the CMF/rGO/Ag foams was further studied by finite element analysis (FEA). The remarkable near-field EMI shielding performance of the CMF/rGO/Ag foam demonstrates that the low density and robust CMF/rGO/Ag foam have enormous advantages and wide application prospects as EMI shielding materials of electronic packaging.

赋予具有超低密度和动态稳定结构的电磁干扰 (EMI) 屏蔽泡沫至关重要但具有挑战性。在这里，我们提出了一种简便的一步热处理策略来制造轻质银/还原氧化石墨烯涂层碳化三聚氰胺 (CMF/rGO/Ag) 混合泡沫，具有卓越的机械性能和出色的 EMI 屏蔽效果 (EMI SE)。由于 rGO 在 CMF 骨架和银之间的界面增强，CMF/rGO/Ag 泡沫在 1000 次加载-卸载压缩测试循环后表现出出色的结构稳定性。此外，仅在 16 mg cm ^{-3 的}密度下，泡沫的 EMI SE 就达到了 50.6 dB 。归一化表面特定 SE 高达 7616 dB cm ² g ^-1具有 0.09 vol% 的超低 Ag 含量。有趣的是，多孔骨架和多个界面的协作导致 CMF/rGO/Ag 泡沫的异常高吸收系数（超过 0.5）。通过有限元分析 (FEA) 进一步研究了 CMF/rGO/Ag 泡沫的高吸收系数屏蔽机制。CMF/rGO/Ag泡沫出色的近场EMI屏蔽性能表明，低密度、坚固的CMF/rGO/Ag泡沫作为电子封装的EMI屏蔽材料具有巨大的优势和广泛的应用前景。