Membrane-electrode assembly for solid polymer electrolyte fuel cell and solid polymer electrolyte fuel cell

A membrane-electrode assembly for a solid polymer electrolyte fuel cell, the membrane-electrode assembly comprising:

• a proton-conductive composite membrane comprising:
• a reinforcing sheet having a plurality of through-holes extending in a thickness direction of the reinforcing sheet, the through-holes being provided in a portion other than an edge of the reinforcing sheet in an in-plane direction, and
• an electrolyte membrane provided on an inner surface of the through-holes and on a surface of the portion of the reinforcing sheet in which the plurality of through-holes are provided;
• an anode electrode layer provided on one surface of the proton-conductive composite membrane;
• a cathode electrode layer provided on another surface of the proton-conductive composite membrane, at least one of an edge of the anode electrode layer and an edge of the cathode electrode layer in the in-plane direction being arranged outside in the in plane direction with respect to the portion in which the plurality of through-holes are provided;
• and
• a pair of gas diffusion layers provided on the anode electrode layer and the cathode electrode layer, wherein at least one of gas diffusion layers is bonded with an adhesive layer to an edge of the proton-conductive composite membrane in the in-plane direction, wherein the adhesive layer is bonded to the edge of the reinforcing sheet.