Preparation method of anti-antipolar gas diffusion layer, gas diffusion layer and application

The invention relates to the technical field of fuel cells, in particular to a preparation method of an anti-antipolar gas diffusion layer, the gas diffusion layer and application. The method comprises the following steps: preprocessing the substrate layer; obtaining microporous layer slurry; covering at least part of the surface of the pretreated substrate layer with the microporous layer slurry, and then performing first drying and first roasting to obtain a first sample; deionized water and alcohol are added into the anti-antipolar substance, then the resin solution is added for first uniform mixing, and anti-antipolar slurry is obtained; wherein the weight ratio of the deionized water to the alcohol is controlled, and the weight ratio of the antipolar substance to the resin solution is controlled; and covering at least part of the surface of the first sample with the anti-antipolar slurry to obtain the anti-antipolar gas diffusion layer. The technical problem that an existing anti-antipolar gas diffusion