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

摘要

A membrane electrode assembly for a polymer electrolyte fuel cell includes: a proton conductive membrane for conducting protons; electrode catalyst layers arranged at both sides of the proton conductive membrane containing catalyst particles and an electrode electrolyte; and gas diffusion layers arranged on the respective electrode catalyst layers, having a porous basic material. Further, intermediate layers each having a thickness of 2-6 μm are included, with noble metallic nanoparticles, an electrode electrolyte and carbon powder.

主权项

1. A membrane electrode assembly for a polymer electrolyte fuel cell comprising:
a proton conductive membrane for conducting protons; electrode catalyst layers arranged on both sides of the proton conductive membrane, each having catalyst particles and an electrode electrolyte; gas diffusion layers arranged on the electrode catalyst layers, each including a porous basic material; and at least one intermediate layer having a thickness of 2-6 μm arranged between at least one of the electrode catalyst layers and corresponding one of the gas diffusion layers, containing noble metallic nanoparticles which are not supported by a carrier, an electrode electrolyte, and carbon powder; wherein: said carbon powder of said intermediate layer comprises fibrous carbon; a content of the noble metallic nanoparticles is in the range of 0.1 to 0.5 mg/cm2 per unit projected area; and a content of the electrode electrolyte in the at least one intermediate layer is in the range of 20 to 25 mass % to a content of the noble metallic nanoparticles.