High-performance gas diffusion layer for fuel cell and preparation method of high-performance gas diffusion layer

The invention provides a high-performance gas diffusion layer for a fuel cell and a preparation method of the high-performance gas diffusion layer. The preparation method comprises the following steps: performing one-time vacuum filling type hydrophobic treatment on a carbon paper base material, and preparing, coating and thermocuring high-uniformity microporous layer slurry. In the hydrophobic treatment process, the saturation of the carbon paper base material is measured, uniform and stable hydrophobic emulsion is prepared, one-time filling of the emulsion is achieved through a vacuum device, hydrophobic treatment is completed, the interior of the carbon paper base material is evenly wrapped with a hydrophobic agent, and the loading capacity consistency is high; in the microporous layer slurry preparation and coating process, uniform and stable microporous layer slurry is obtained based on the addition of a surfactant and an emulsifier and the control of a dispersion process, and coating is performed by usi