3 results about "Hydrophobic polymer" patented technology

The invention discloses a hydrophobicity regulation and control method of an alkaline polyelectrolyte fuel cell catalyst layer. The method comprises the following steps of firstly, synthesizing a series of fluorine-containing alkaline polyelectrolytes, and dissolving and dispersing the fluorine-containing alkaline polyelectrolytes in an organic solvent (such as dimethyl sulfoxide) to prepare a polymer solution with a certain concentration; then adding the hydrophobic polymer solution and the common polymer solution into the catalyst dispersion solution according to different volume ratios (thehydrophobic polymer solution can be completely used), and carrying out uniform ultrasonic dispersion to prepare catalyst ink; finally, spraying uniformly dispersed catalyst ink on the alkaline membrane, removing the solvent by heating in the spraying process, and placing the alkaline membrane with the catalyst layer between the gas diffusion layers to form a membrane electrode. The method is characterized in that the hydrophilicity and hydrophobicity of the catalyst layer can be adjusted by adding the hydrophobic polymer solution in proportion, the hydrophobic polyelectrolyte is located in athree-phase reaction interface, and the hydrophilicity and hydrophobicity of reaction active sites of the catalyst layer can be accurately adjusted and controlled without introducing the extra electrode components.