Superelastic graphene aerogel-based metamaterials

Mingmao Wu, Hongya Geng, Yajie Hu, Hongyun Ma, Ce Yang, Hongwu Chen, Yeye Wen, Huhu Cheng, Chun Li, Feng Liu, Lan Jiang and Liangti Qu ()
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Mingmao Wu: Fuzhou University
Hongya Geng: Department of Materials Imperial College London Prince Consort Road
Yajie Hu: Tsinghua University
Hongyun Ma: Tsinghua University
Ce Yang: Tsinghua University
Hongwu Chen: Tsinghua University
Yeye Wen: Tsinghua University
Huhu Cheng: Tsinghua University
Chun Li: Tsinghua University
Feng Liu: Chinese Academy of Sciences
Lan Jiang: Beijing Institute of Technology
Liangti Qu: Tsinghua University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Ultralight, ultrastrong, and supertough graphene aerogel metamaterials combining with multi-functionalities are promising for future military and domestic applications. However, the unsatisfactory mechanical performances and lack of the multiscale structural regulation still impede the development of graphene aerogels. Herein, we demonstrate a laser-engraving strategy toward graphene meta-aerogels (GmAs) with unusual characters. As the prerequisite, the nanofiber-reinforced networks convert the graphene walls’ deformation from the microscopic buckling to the bulk deformation during the compression process, ensuring the highly elastic, robust, and stiff nature. Accordingly, laser-engraving enables arbitrary regulation on the macro-configurations of GmAs with rich geometries and appealing characteristics such as large stretchability of 5400% reversible elongation, ultralight specific weight as small as 0.1 mg cm−3, and ultrawide Poisson’s ratio range from −0.95 to 1.64. Additionally, incorporating specific components into the pre-designed meta-structures could further achieve diversified functionalities.

Date: 2022
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DOI: 10.1038/s41467-022-32200-8

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