Pulse spray coating and Dispense Jet technology are two ways of applying catalyst inks onto membranes in electrode assemblies of proton exchange and direct methanol fuel cells.
Selective spray coating is a highly selective method of jetting materials. Fluid reaches locations not possible with other applicators. Dot sizes to 1.2 mm (0.05 in.) are possible as well as thinner film builds of 5 µm. Jetting is fast, up to 500 mm/sec (20 in./sec), because there is no Z-axis motion.
Discrete jet dispensing suits material application in tight spaces as small as 175 µm with final dot diameters as small as 200 µm. Shot volumes of 1.0 nL are possible and jet stream size can be as small as 50 µm. Fluids from 1 to 250,000 mPa (cps) can be jetted.
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Filed Under: Energy management + harvesting, Materials • advanced