Proton Exchange Membrane Coating System

Performance and Durability of Electrodes with Platinum Catalysts in Polymer Electrolyte Cells Prepared by Ultrasonic Spray Deposition

Proton exchange membrane (PEM) fuel cell system. The power generation element of a fuel cell system is a membrane electrode assembly (MEA). A method of preparing a MEA for a polymer electrolyte fuel cell using a direct ultrasonic spray deposition method using a platinum black catalyst suspension was developed. A 50 kHz ultrasonic head is used to coat a thin, uniform electrode layer on a substrate. These electrodes are designed to operate at high efficiency when operating under pressurized H2 and O2 to meet the fuel cell system’s efficiency goals, namely a current density of 200 mA / cm2 and a potential> 900 mV. For electrode deposition, the catalyst is suspended in a mixture of water and isopropanol solvent and the ink formulation is optimized. Through this method of direct deposition onto polymers, the conductivity between ion channels can be improved. As a result, the electrode preparation method brings benefits in battery performance compared with the conventional method.