GDE Hot Pressing Membrane Electrode
GDE Hot Pressing Membrane Electrode – Membrane Electrode Coating
The first generation of MEA preparation technology adopts the hot pressing method to press the CL-coated cathode and anode GDL on both sides of the PEM to obtain MEA. This MEA is called a “GDE” structure.
The preparation process of GDE-type MEA is relatively simple. Because the catalyst is coated on GDL, it is beneficial to the formation of pores in the MEA, while protecting the PEM from deformation. However, the amount of catalyst coated on GDL during the preparation of GDE MEA is not easy to control, and the catalyst slurry easily penetrates into the GDL, causing some catalysts to not fully function, and the utilization rate is even lower than 20%, which increases the MEA. the cost of. In addition, because the expansion system of the catalyst-coated GDL and PEM is different, during the long-term operation of the fuel cell, the interface between the two is likely to be partially peeled off, which causes the internal contact resistance of the fuel cell to increase, and the comprehensive performance of MEA is insufficient. ideal. At present, the preparation process of GDE structure MEA has been rarely used and has been basically eliminated.
Cheersonic’s unique ultrasonic spray technology delivers efficient, stable and precision coating, which improves the catalyst utilization and improves the three-dimensionality. Designed for sprayingPEM,GDL,Electrode and electrolyte materials, as well as carbon black ink suspension, PTFE binder, ceramic slurry, platinum, platinum and other expensive metal catalysts. The standing model can meet the needs of R&D.
