Abstract Multifunctional lightweight and mechanically robust aerogels have been shown potential interest in flexible electronics and electromagnetic interference (EMI) shielding applications. In this work, we demonstrate an environmental friendly template assist cost-efficient silver/3D graphene aerogels (Ag/GAs) by one step freeze-casting route and explore for conductive electrodes and shielding applications. The influence of Ag content on the structural, mechanical, electrical properties, and shielding performance of GAs and its EM interactions were studied. The Ag/GAs exhibited elastic behavior without evidencing plastic deformation under cyclic compressive loading. Broadband conductivity studies suggest the Ag/GAs exhibited superior frequency-independent behavior with electrical conductivity ~0.032 S/cm and consequently enhanced the EM shielding effectiveness up to ~32 dB. The efficient EMI shielding performance of the Ag/GAs is envisaged by connective dissipation as well as multiple reflections and scattering of EM waves by the effect of Ag nanofillers in the 3D-graphene network.

中文翻译：

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定制机械坚固的高导电银/3D 石墨烯气凝胶的性能，具有卓越的电磁屏蔽效果

摘要 多功能轻质和机械坚固的气凝胶已在柔性电子和电磁干扰 (EMI) 屏蔽应用中显示出潜在的兴趣。在这项工作中，我们通过一步冷冻铸造路线展示了一种环保模板辅助具有成本效益的银/3D 石墨烯气凝胶（Ag/GAs），并探索了导电电极和屏蔽应用。研究了Ag含量对GAs的结构、机械、电性能和屏蔽性能及其电磁相互作用的影响。在循环压缩载荷下，Ag/GAs 表现出弹性行为而没有证明塑性变形。宽带电导率研究表明，Ag/GA 表现出优异的频率独立行为，电导率约为 0。032 S/cm，从而将 EM 屏蔽效率提高到 ~32 dB。Ag/GAs 的有效 EMI 屏蔽性能是通过连接耗散以及 3D 石墨烯网络中的 Ag 纳米填料的作用对 EM 波的多次反射和散射来实现的。