Superelastic graphene aerogel-based metamaterials

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.

Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

“…First, the transistor applications with graphene channels preferred the wafer-scale growth of monolayer graphene , (directly grown) on Si related dielectric substrates , or meter-scale chemical vapor deposition growth over metal substrates . Second, the graphene nanosheets , are incorporated into supramolecular nanostructures and composites, − deposited for thin films, , and assembled into macroforms such as aerogel − or hydrogel . The lateral size and vertical thickness of graphene nanosheets require homogeneity for controllable conductivity and device performance.…”

Interfacial engineered superelastic metal-organic framework aerogels with van-der-Waals barrier channels for nerve agents decomposition

“…The MNAs possessed a lower pressure drop than that of nanofibrous membranes at the same airflow velocity (220 and 375 Pa, respectively). The 3D finite element model based on MNAs was constructed and the seepage-stress field coupling was established in the obtained continuous porous medium 47 . As shown in Fig.…”

Experimental and Theoretical Indagation of Binder-Free N-Graphene Coupling Vanadium Tetrasulfide Aerogel Cathode for Promoting Aqueous Zn-Ion Storage

“…To achieve this, the construction of three-dimensional (3D) free-standing graphene aerogel is a feasible strategy. The graphene aerogel contains interconnected 2D sheets with rich pores and ultralow density and flexibility, while the restacking of sheets can be effectively inhibited. − Benefiting from its structure advantages, the 3D architecture can provide higher electrical conductivity for rapid ion/electron transport, a larger electrode/electrolyte interfacial area, and greater mechanical integrity than that of graphene-based films or powders. In addition, conventional cathodes generally contain inert addition agents like plastering agent, which always block electron transport and possess deficient ion permeation .…”