▎ 摘　　要

NOVELTY - Graphene-based composite aerogel with ultra-high tensile elasticity comprises 5-99% reduced graphene oxide and at least one nanofiber, and the maximum reversible tensile strain of the graphene-based composite aerogel material itself is 500-3000%. USE - The graphene-based composite aerogel is useful in the field of stretchable conductors, smart sensors or aerospace (claimed). ADVANTAGE - The method constructs a highly curly three-dimensional cross-linked network and strengthens the three-dimensional network through a composite strategy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the graphene-based composite aerogel with ultrahigh tensile elasticity, comprising (a) taking aqueous dispersion containing graphene oxide and nanofibers, using the template method to construct the macroporous structure, and further reducing to obtain reduced graphene oxide/nanofiber composite hydrogel, where the solid content of the mixed dispersion liquid is 0.1-3%, and the weight ratio of graphene oxide to the total solid is 5-99%, (b) drying the reduced graphene oxide/nanofiber composite hydrogel to obtain reduced graphene oxide/nanofiber composite aerogel, (c) subjecting the reduced graphene oxide/nanofiber composite aerogel to a high curling treatment of the internal structure of the aerogel by means of compression-annealing treatment.