A Proton Electrolyte Membrane (PEM) fuel cell consists of two bipolar plates (anode and cathode), a Membrane Electrode Assembly, and Diffusion Media. These elements when connected to an electric load produce DC power.
Hydrogen fuel cells need two elements to generate power, oxygen from the air, and hydrogen. The hydrogen and oxygen react through the membrane assembly to produce the electric power. The only by-product of the fuel cell is pure water.
Fuel cells are grouped together in a "fuel cell stack." This stack then becomes the engine in a fuel cell automobile, or the power generator for electricity at our Dow Freeport site.
