Ultrasonic Spray And Two-Fluid Spraying
Compared with Ultrasonic spray coating system and two-fluid spraying system
As one of the new energy sources with great development prospects around the world, PEMFC is known for its high conversion efficiency and low pollution. Protons exchange membrane fuel cell construction: MEA (PEM, catalyst and GDL) and bipolar plate. Proton exchange membrane is one of the most critical components of PEMFC, which directly affects the performance and life of the battery.
Two-fluid nozzles are also known as air atomization nozzles. The so-called two fluids are compressed air and liquid. So it is also called air atomizing nozzle. The main function of the air atomizing nozzle is spray humidification, which is widely used. The biggest difference between ultrasonic spraying and traditional single-fluid or two-fluid spraying is that the atomizing device or atomizing nozzle adopts an ultrasonic atomizing device, that is, an ultrasonic nozzle. Compared with traditional two-fluid spraying, ultrasonic spraying has the advantages of high coating uniformity, high raw material utilization rate, high coating thickness control precision, thinner coating thickness, less splashing, no clogging of the nozzle, and low maintenance cost. Compared with coating processes such as vacuum evaporation and CVD, ultrasonic spraying is a more economical thin film coating process, especially for the preparation of large-area thin films. The equipment cost of ultrasonic spraying is much lower than that of vacuum coating equipment.
Ultrasonic coating technology creates highly uniform, repeatable and durable membrane. It operates through continues vibration from the nozzle to break up the agglomerated particles into evenly dispersed functional particles, maximizing surface area exposure of the catalyst to create higher electrochemical performance of coatings. And when using the ultrasonic spray coating technology apply catalyst coating to the membranes by adjusting the spray parameters (height, flow rate and frequency of the nozzle) to control the rate of water added, because it needs to keep the thin membrane moist and not deformed.
Cheersonic has committed to the research and development of various ultrasonic equipment for more than ten years. CENG-S, CENG-M and CENG-L developed by our company is basic, programmable micro material spray coating system. Various types of catalysts suspensions including the carbon black ink, PTFE binder, ceramic slurry, platinum and other precious metal can be sprayed by using this bench-top ultrasonic spraying system capable of programming and controlling x, y, z three-axis coordinated operation are deposited onto PEM fuel cells, GDL, electrodes, electrolyte membranes and SOFC to create maximum load and high cell efficiency. Precise and controllable liquid supply system compared with different types of customized nozzles, significant reduction in materials usage and producing the highly uniform durable,repeatable and durable coatings from R & D to medium-sized batch production. The body is small and easy to place, the spraying performance is stable, and the operation is convenient.
