Membrane electrode assembly, fuel cell stack and fuel cell system

摘要

A membrane electrode assembly (MEA) is structured such that an anode is joined, via a carbon layer, to one surface of a solid polymer electrolyte membrane containing PBI and phosphoric acid and a cathode is joined to the other surface. The carbon layer is constituted by carbon powder and a first binder. Carbon black, carbon nanotube and the like may be used as carbon powder. The thickness of the carbon layer is preferably greater than that of the solid polymer electrolyte membrane.