A fuel cell graphene gas diffusion membrane and preparation method thereof

Abstract

The invention relates to a fabrication technology of a graphene gas diffusion film of a fuel cell, in particular to a graphene gas diffusion film of a fuel cell and a preparation method of the graphene gas diffusion film. The graphene gas diffusion film sequentially comprises a proton conductive dielectric layer, a carbon supported catalyst layer and a carbon fiber conductive paper layer from left to right, wherein the proton conductive dielectric layer is a graphene nanometer conductive coating layer, the carbon supported catalyst layer a carbon nanotube supported palladium catalyst material layer, and the carbon fiber conductive paper layer is graphene composite carbon fiber conductive paper comprising graphene composite carbon fiber and graphene composite polyester fiber. By the graphene gas diffusion film, the effective power generation efficiency of the fuel cell is improved, the electric conductivity of the carbon fiber is effectively improved, the electron moving speed is increased, the contact electric conductivity among the carbon fibers is improved, the resistivity is reduced, the effective power generation efficiency of the fuel cell is improved, and the service lifetime of the fuel cell is prolonged. By the graphene gas diffusion film, electrons in a separation fuel are effectively separated, the electrons and protons are rapidly transmitted, and the efficiency of the fuel cell is improved.

Description

technical field [0001] The invention relates to a manufacturing technology of a fuel cell gas diffusion membrane, in particular to a fuel cell graphene gas diffusion membrane and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional single-layer carbon atom structure material. It is the strongest, hardest, lightest and thinnest substance in the world. The nano-semiconductor materials, and therefore the most ideal electrode materials, are considered to induce many material properties and qualities. Carbon fiber is a high-strength, high-modulus fiber material with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite microcrystals along the axial direction of the fiber, and undergoing carbonization and graphitization. Carbon fiber is "soft on the outside and rigid on the inside", with a light weight ratio, but its strength is higher than that of steel, and i...

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Problems solved by technology

High-performance carbon fiber is currently the most widely used low-density material for gas diffusion layers. Commercial production has been achieved abroad, but my country has not yet achieved it.

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