▎ 摘　　要

NOVELTY - Preparing graphene silicon carbon composite membrane, comprises (1) dispersing graphite oxide in water to prepare graphite oxide suspension, using high-pressure homogenizer to peel off graphite oxide suspension, and homogenizing, obtaining graphene oxide dispersion, and freeze-drying, (2) dissolving carbon source precursor completely in solvent, uniformly dispersing graphene oxide solid in solution A to obtain dispersion system B, adding nano-silicon into dispersion system B, and using a sand mill to grind for 1-10 hours to obtain a slurry, using a coating machine to coat the slurry to obtain a graphene oxide silicon carbon film, (3) laminating multiple layers of graphene oxide silicon carbon films together, injecting graphene oxide dispersion liquid at the interface, and using the swelling and hydration of graphene oxide to realize multi-layer graphene oxide silicon carbon films, fixing multiple layers, and carbonizing at 500-1000℃ for 1-10 hours and naturally cooling. USE - The method for preparing graphene silicon carbon composite membrane used in a graphene-silicon-carbon composite film electrode material (claimed). ADVANTAGE - The method increases the mobility of electrons, At the same time, the electron transmission path and the solid phase diffusion distance of lithium ions are effectively shortened, and improves the cycle performance of silicon under high rate current. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene silicon carbon composite membrane, obtained by the method as mentioned above.