Membrane Electrode Assemblies Fabrication By Ultrasonic – Spray Technique

The following paper presents the ultrasonic deposition method of a carbon-based platinum ink solution onto catalytic membranes and its advantages in manufacturing fuel cells. Ultrasonic spray coating is a unique spraying method based on ultrasonic spray nozzles technology. The sprayed material is first in a liquid state, where the liquid can be a solution, a sol, a suspension, etc. The liquid ultrasonic coating is first atomized into fine particles using an ultrasonic atomization device, and then evenly coated on the surface of the substrate by a certain amount of carrier gas, thereby forming a coating or film. Catalytic ink is a mixture of catalyst powder, water, solvent and ionomer, in suspension form. The method used is effective for obtaining layers with low platinum loading and very good electrochemical characteristics.