▎ 摘　　要

NOVELTY - A composite film comprises graphene sheet and macromolecule polymer fiber inserted in the graphene sheet to form the network structure, where the high molecular polymer is polyacrylic acid, polyacrylonitrile and/or polyethylene oxide, and the graphene sheet mass content in the composite film is 5-90%. USE - Composite film for fuel cell gas diffusion electrode, super capacitor electrode or anode of lithium ion battery (all claimed). ADVANTAGE - The composite film has increased specific surface area, three-dimensional porous structure, strengthened mass transfer electrode in the electrostatic spinning technology, realized scale of the batch preparation, simple preparation process, controllable structure, high preparation efficiency, advanced energy technology, high-performance and low-cost development. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a composite film.