Preparation method and application of graphene-based composite aerogel

The invention discloses a preparation method and application of graphene-based composite aerogel, and the preparation method of the graphene-based composite aerogel comprises the following steps: S10, preparing a nano oxide precursor spinning solution, and adopting an electrostatic spinning process to obtain a nano oxide fiber membrane; s20, calcining the nano oxide fiber membrane, homogenizing and crushing, and performing ultrasonic treatment to obtain ceramic short fibers; and S30, mixing the ceramic short fibers with graphene oxide to prepare a solution, and sequentially carrying out ultrasonic treatment, bidirectional freezing and freeze drying to obtain the graphene-based composite aerogel. The graphene-based composite aerogel with a good shape can be formed by the bidirectional freeze drying process, the mechanical strength of the aerogel can be enhanced by adding the nano oxide fibers, so that the graphene oxide composite aerogel has high compressibility and scalability at the same time, and in additio