▎ 摘　　要

NOVELTY - The method involves uniformly dispersing a prepared graphene in a volatile organic solution to form a graphene organic solution of monomer graphene (S101). The sheet diameter of the monomer graphene is 30-150nm. The content of the graphene in the graphene organic solution is determined and controlled by adjusting the concentration of the graphene organic solution (S102). A carrier is determined for preparing a graphene film according to the content (S103). The carrier is immersed in the graphene organic solution. The carrier is taken out after the infiltration is completed (S104). The carrier is dried, so that the graphene film is formed on the surface of the carrier. The volatile organic solution is alcohol. The graphene organic solution is graphene alcohol solution. USE - Method for preparing graphene film (claimed) in electronic device i.e. batteries, photodetectors, photovoltaic cells, phototransistors, photonic devices, photomask, photodiode, photoluminescence devices and solar cells. ADVANTAGE - The method reduces the volume of the device including the graphene film, which helps to increase the compaction density of the pole piece, and improve the volumetric energy density of the battery. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the method for preparing graphene film in electronic device i.e. batteries (Drawing includes non-English language text). S101Step for uniformly dispersing prepared graphene in volatile organic solution to form graphene organic solution of monomer graphene S102Step for determining and controlling content of graphene in graphene organic solution by adjusting concentration of graphene organic solution S103Step for determining carrier for preparing graphene film according to content S104Step for taking out carrier after infiltration is completed