Fuel-Cells-Etc - 3 Layer Catalyst Coated Membranes

The 3-Layer MEAs, also known as Catalyst Coated Membranes (CCMs), do not come with a GDL. This will allow you to experiment with different GDLs to find more optimal structures in your testing environment. The downside is that the catalyst must now be applied directly to the membrane which is a more difficult process. Both options will perform equally after the break-in period for the MEA, which is usually around 12 to 24 hours of operation. This operational period allows the product water to be distributed throughout the membrane and fully hydrate the MEA. 5-Layer MEAs are generally less expensive per MEA, whereas 7-Layer and 3-Layer MEAs have a higher cost, due to the increase in time and labor for manufacturing.