▎ 摘　　要

NOVELTY - NOVELTY B The composite membrane has a separator that is provided with a separator base layer. A graphene/cellulose composite material layer is provided on a surface of the separator base layer facing a positive electrode side. A graphene/cellulose composite material layer is provided on a surface of the separator base layer facing a negative electrode side. The graphene/cellulose composite layer includes graphene, cellulose, and other auxiliaries. One portion of cellulose is partially embedded between the sheets of graphene, while the other portion is attached to the surface of the sheet of graphene. The other auxiliary agent is selected from one of a surfactant and a dispersing agent. USE - Graphene/cellulose composite membrane. ADVANTAGE - ADVANTAGE B The composite membrane is simple in structure. The reaction condition is mild, the production cycle is short, and large-scale industrial production can be realized. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of graphene/cellulose composite membrane. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical view illustrating the changes in charge/discharge/discharge capacity of different batteries. (Drawing includes non-English language text)