Polymer electrolyte fuel cell electrolyte membrane, and the membrane electrode assembly having the electrolyte membrane, and polymer electrolyte fuel cell

Polymer electrolyte fuel cell electrolyte membrane is a reinforced membrane and electrolyte membrane for a polymer electrolyte fuel cell and an electrolyte disposed in a gap between the non-woven fibers made of non-woven fibers, wherein nonwoven fibers, a region where the in the plane of the electrolyte membrane has a non-uniform mass distribution, corresponding to at least a portion of the peripheral portion of the gasket frame sides for fuel cell mounting the electrolyte membrane for the polymer electrolyte fuel cell mass of the non-woven fiber per unit area in the said greater mass of non-woven fibers per unit area in the region corresponding to the central portion of the gasket frame sides.