1.3 PEM FUEL CELLS
The phenomena occurring during PEM fuel cell operation are complex. Specifically, they involve heat transfer, species and charge transport, multiphase flow, and electrochemical reactions. Fundamental knowledge of these multiphysics phenomena and their relevance to material properties are critically important to overcome the two major barriers, durability and cost. A PEM fuel cell consists of the following major components:
• Catalyst layers (CLs) and membrane, which are components that make up the MEA (membrane electrode assembly)
• Gas diffusion layers (GDLs) and microporous layers (MPLs)
• Bipolar plates (BPs), gas flow channels (GFCs), and/or cooling units
PEM fuel cells differ from
• Solid oxide fuel cells (SOFCs) or molten ...