Abstract Many efforts have been devoted to fabricating three-dimensional graphene-derived aerogels owing to their promising real-world applications. However, it is still a challenge to fabricate a pure graphene-based aerogels with both high mechanical strength and conductivity. In this study, we report a facile and scalable method to prepare pure chemically converted graphene aerogels (CCGA) from high-concentration gel precursors with the assistance of two-step freeze-drying. The CCGA demonstrates a high compressive strength of 106.1 kPa under a strain of 80%. Its resistance in the thickness direction is variable and reaches as low as 6.6 Ω at a compressive strain of 90%. The aerogels also show many interesting behaviors and properties, including promising Joule heating-assisted oil absorption, non-flammability, and the ability to sense a wide range of applied pressure.

中文翻译：

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多功能机械强度和高导电性化学转化石墨烯气凝胶

摘要 由于其在现实世界中的应用前景，许多努力致力于制造三维石墨烯衍生的气凝胶。然而，制造具有高机械强度和导电性的纯石墨烯基气凝胶仍然是一个挑战。在这项研究中，我们报告了一种简便且可扩展的方法，在两步冷冻干燥的帮助下，从高浓度凝胶前体制备纯化学转化石墨烯气凝胶（CCGA）。CCGA 在 80% 的应变下表现出 106.1 kPa 的高压缩强度。它在厚度方向上的电阻是可变的，在 90% 的压缩应变下可低至 6.6 Ω。气凝胶还表现出许多有趣的行为和特性，包括有前途的焦耳加热辅助吸油、不易燃、