Ultrasonic Spray Coating for Proton Exchange Membrane Fuel Cell

Abstract

Ultrasound is now a widely used method for catalyst synthesis, catalyst support treatment, catalyst layer fabrication, membrane electrode assembly (MEA) fabrication, and humidifier etc. for fuel cell applications. Among the abovemen-tioned uses, ultrasonic technology has been utilised mainly for MEA fabrication-especially since it has demonstrated the capability to produce ultra-low platinum loadings. This paper reports the power density and cathode mass power density at peak power and 500 mA/cm 2 conditions for ultrasonically spray coated MEAs. These MEAs were also produced with various Nafion® content ratios and platinum loadings. The results indicate varying optimum values for different conditions.