Patent ID: 8026018

Claim:
An electrolyte membrane-electrode assembly, comprising: an electrolyte membrane; an anode-side electrode comprising an anode-side catalyst layer and an anode-side gas diffusion layer formed on the anode-side catalyst layer, the anode-side electrode being disposed on one side of the electrolyte membrane; a cathode-side electrode comprising a cathode-side catalyst layer and a cathode-side gas diffusion layer formed on the cathode-side catalyst layer, the cathode-side electrode being disposed on the other side of the electrolyte membrane; an anode-side adhesive layer disposed on at least a part of a periphery of the anode-side catalyst layer on the electrolyte membrane; a cathode-side adhesive layer disposed on at least a part of a periphery of the cathode-side catalyst layer on the electrolyte membrane; a cathode-side gasket layer disposed in contact with the cathode-side adhesive layer; and an anode-side gasket layer disposed in contact with the anode-side adhesive layer, wherein a surface-direction end of the anode-side gas diffusion layer is located more on the anode-side gasket layer side than a surface-direction end of the anode-side catalyst layer is, and further, a surface-direction end of the cathode-side gas diffusion layer is located more on the cathode-side gasket layer side than a surface-direction end of the cathode-side catalyst layer is, a surface-direction inner end of the anode-side adhesive layer is located more inside than a surface-direction inner end of the anode-side gasket layer is with respect to a surface direction of the electrolyte membrane-electrode assembly, and further, a part of the anode-side adhesive layer is located to overlap with a part of the anode-side gas diffusion layer with respect to a thickness direction of the electrolyte membrane-electrode assembly, and a surface-direction inner end of the cathode-side adhesive layer is located more inside than a surface-direction inner end of the cathode-side gasket layer is with respect to the surface direction of the electrolyte membrane-electrode assembly, and further, a part of the cathode-side adhesive layer is located to overlap with a part of the cathode-side gas diffusion layer with respect to the thickness direction of the electrolyte membrane-electrode assembly.