Environment-friendly preparation method of carbon fiber paper for gas diffusion layer of fuel cell and carbon fiber paper

The invention discloses an environment-friendly preparation method of carbon fiber paper for a gas diffusion layer of a fuel cell, which comprises the following steps: fully stirring and mixing thermosetting phenolic resin and a polyvinyl alcohol aqueous solution with preset mass to obtain a resin-polyvinyl alcohol mixed solution; placing and drying the resin-polyvinyl alcohol mixed solution in a drying oven for a preset time, taking out the resin-polyvinyl alcohol mixed solution, pouring the resin-polyvinyl alcohol mixed solution on release paper, and coating the resin-polyvinyl alcohol mixed solution through a winding bar to form a film to obtain a hot-melt resin adhesive film; stacking the hot-melt resin adhesive film and single-layer or laminated carbon fiber base paper in a mold, and carrying out hot-pressing curing treatment on a flat vulcanizing machine to obtain carbon fiber hot-pressed paper; and carrying out carbonization treatment and graphitization treatment on the carbon fiber hot-pressed paper a