Definitions for "Proton Exchange Membrane"
See Polymer Electrolyte Membrane.
Also called polymer electrolyte membrane. Specially treated material that looks something like ordinary kitchen plastic wrap but conducts only positively charged ions. It blocks electrons. The separating layer in a PEM fuel cell that acts as an electrolyte (which is proton conducting) as well as a barrier film separating the hydrogen-rich feed in the cathode compartment of the cell from the oxygen-rich anode side.
A polymer sheet that serves as the electrolyte in one type of fuel cell.