Abstract Macro-assembled carbon-based films (GF) have demonstrated tremendous functional applications as high electrical/thermal conductors, and electromagnetic interference (EMI) shielding materials. Here, we report the synergistic effect of graphene and carbon nanotubes (CNT), that electrical conductivity significant improves from 1.78 × 105 to 2.74 × 105 S m−1, and thermal conductivity improves from 510 to 1154 W m−1 K−1 simply by adding 20 wt% CNTs into the graphene films. Moreover, the EMI shielding performance of the macro-assembled graphene-CNT composite films improves from ∼50 dB for pure GF to ∼60 dB for GF with 20 wt% CNT load. Our finding of the synergistic effect opens an avenue to design materials with higher electrical conductivity, thermal conductivity and EMI shielding performance.

中文翻译：

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石墨烯与碳纳米管协同作用制备高性能电磁干扰屏蔽膜

摘要 宏观组装的碳基薄膜 (GF) 作为高电/热导体和电磁干扰 (EMI) 屏蔽材料已显示出巨大的功能应用。在这里，我们报告了石墨烯和碳纳米管 (CNT) 的协同效应，电导率从 1.78 × 105 显着提高到 2.74 × 105 S m-1，热导率从 510 提高到 1154 W m-1 K-1通过在石墨烯薄膜中添加 20 wt% 的碳纳米管。此外，宏观组装的石墨烯-CNT 复合膜的 EMI 屏蔽性能从纯 GF 的~50 dB 提高到具有 20 wt% CNT 负载的 GF 的~60 dB。我们对协同效应的发现为设计具有更高导电性、导热性和 EMI 屏蔽性能的材料开辟了道路。