Gas Diffusion Layer Coating

Gas Diffusion Layer Coating – Spraying Catalyst Solutions – Cheersonic

Proton exchange membrane fuel cells (PEMFCs) are comprised of a proton-conductive membrane which has cathode catalyst layer on one side and anode catalyst layer on the other side, sandwiched between two gas diffusion layers. Gas diffusion layers serve as current collectors that allow ready access of the fuel and oxidant to anode and cathode catalyst surfaces, respectively. Therefore, the requirements of an ideal gas diffusion layer are several, including diffusing the gaseous reactants effectively into the catalyst layers, having high in-plane and through-plane electronic conductivity, having uniform surface for good electrical contact, and having proper hydrophobicity for water management in each application. A gas diffusion layer contains a mixture of carbon black powder, hydrophobic dispersion agent, and solvents, applied onto carbon paper or woven carbon cloth substrates (both have macro-pores), to form a uniform thin micro-porous layer on top of the macroporous layer of the substrates.

Cheersonic’s ultrasonic equipment is suitable for spraying catalyst solutions containing carbon black ink suspension, platinum slurry and other precious metal solutions. From R&D to production, our non-clogging technology results in greater control of coating attributes, significant reduction in materials usage, and reduced maintenance and downtime. It can prepare fuel cell proton exchange membrane with excellent performance. It integrates multiple systems such as ultrasonic, dispersion, carrier gas, liquid, heating station, vacuum adsorption, and exhaust emission control.

The advantages of Cheersonic’s ultrasonic equipment include：

1.Full range of ultrasonic nozzles
2.Spray patterns are easily shaped for precise coating applications
3.Up to 80% reduction in material consumption with reduced overspray, conserving expensive catalyst inks.
4.Spray plume can be easily shaped and directed to coat only target area.
5.Self-cleaning nozzle design prevents clogging
6.Extremely easy-to-control spray provides reliable and consistent results
7.Very uniform and durable coating (even on electrolyte substrates).