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

摘要

The present invention provides a membrane electrode assembly for a polymer electrolyte fuel cell, including: an electrolyte membrane; a catalyst layer; and a conductive porous gas diffusion layer, in which an interface between the catalyst layer and the electrolyte membrane is provided with a groove for allowing one of passage and retention of a fluid, and a polymer electrolyte fuel cell employing the membrane electrode assembly. As a result, there is provided at low costs the membrane electrode assembly for a polymer electrolyte fuel cell having improved drainage performance and the polymer electrolyte fuel cell employing the membrane electrode assembly and having stable power generation performance.

主权项

1. A membrane electrode assembly for a polymer electrolyte fuel cell, comprising:
an electrolyte membrane; a catalyst layer; a conductive porous gas diffusion layer, wherein the catalyst layer and the electrolyte membrane have common boundaries; and grooves for allowing one of passage and retention of a fluid being formed in the common boundaries, and wherein the grooves have a tapered shape such that a width of each groove is largest at the common boundary, and wherein the catalyst layer is disposed between the gas diffusion layer and the electrolyte membrane.