What is the Purpose of a Gas Diffusion Layer (GDL)?

The Gas Diffusion Layer (GDL) plays several critical roles in a typical fuel cell application and is often integrated as part of the Membrane Electrode Assembly (MEA). Typical applications that use GDLs consist of Polymer Electrolyte Fuel Cells (PEMFC) and Direct Methanol Fuel Cells (DMFC). When a GDL is coated with a catalyst it is than referred to as a Gas Diffusion Electrode (GDE), which are sometimes sold or installed separately from the Membrane or MEA.  Acting as an electrode is the easy … [Read more...]