RESIN-FRAMED MEMBRANE ELECTRODE ASSEMBLY

摘要

A resin-framed membrane electrode assembly includes a membrane electrode assembly, a resin frame, and a clearance. The membrane electrode assembly includes an electrolyte membrane, a first electrode, a second electrode, and a step. The first electrode is located on a first surface of the electrolyte membrane and includes a first catalyst layer and a first diffusion layer which are stacked on the first surface in a stacking direction. The resin frame is disposed outside the membrane electrode assembly. The clearance is provided between the resin frame and an outer edge surface of the first diffusion layer to be filled with a filler such that the filler reaches a level higher than a lower one of a height of the first diffusion layer or a height of the resin frame in cross section in the stacking direction.

主权项

1. A resin-framed membrane electrode assembly comprising:
a membrane electrode assembly including
an electrolyte membrane, a first electrode located on a surface of the electrolyte membrane and including a stack of a first catalyst layer and a first diffusion layer, and a second electrode located on another surface of the electrolyte membrane and including a stack of a second catalyst layer and a second diffusion layer, and having a step in an outer peripheral edge portion of the membrane electrode assembly formed by a size difference in which a planar size of the first diffusion layer is smaller than a planar size of the second diffusion layer; and a resin frame disposed outside the membrane electrode assembly, wherein a clearance between the resin frame and an outer edge surface of the first diffusion layer is filled with a filler such that the filler reaches a level higher than a lower one of a height of the first diffusion layer or a height of the resin frame in cross section in a stacking direction.