▎ 摘　　要

NOVELTY - A fuel cell thin layered graphene gas diffusion layer preparing method involves dispersing ultrahigh molecular weight polyethylene and graphene uniformly with ethylene monomer in advance and polymerizing to obtain graphene-doped ultrahigh molecular weight polyethylene, mixing 10-20 wt.% graphene-doped ultrahigh molecular weight polyethylene with 80-90 wt.% organic solvent and stirring well at normal temperature to obtain a uniform polymer liquid. The polymer liquid is coated on the surface of the glass to form a base film, sprayed with the conductive agent dry powder and stretched in an olefin vapor environment, followed by allowing the conductive agent dry powder uniformly adhere to the surface of the film to form a conductive layer forming the micropore with stretching, drying, removing the organic solvent and forming a micropores in the base film to obtain the finished product, where graphene accounts for the mass of doped ultrahigh molecular weight polyethylene 10%. USE - Method for preparing fuel cell thin layered graphene gas diffusion layer. ADVANTAGE - The method enables preparing fuel cell thin layered graphene gas diffusion layer with reduced mass transfer resistance, and excellent conductivity, strength and toughness. DETAILED DESCRIPTION - A fuel cell thin layered graphene gas diffusion layer preparing method involves dispersing ultrahigh molecular weight polyethylene and graphene uniformly with ethylene monomer in advance and polymerizing to obtain graphene-doped ultrahigh molecular weight polyethylene, mixing 10-20 wt.% graphene-doped ultrahigh molecular weight polyethylene with 80-90 wt.% organic solvent and stirring well at normal temperature to obtain a uniform polymer liquid. The uniform polymer liquid is coated on the surface of the glass to form a base film, sprayed with the conductive agent dry powder and stretched in an olefin vapor environment, followed by allowing the conductive agent dry powder uniformly adhere to the surface of the film to form a conductive layer forming the micropore with stretching, drying, removing the organic solvent and forming a micropores in the base film to obtain the finished product, where graphene accounts for the mass of doped ultrahigh molecular weight polyethylene 10%. An INDEPENDENT CLAIM is also included for a fuel cell thin layered graphene gas diffusion layer.