| abstract |
The durability of a fuel cell using a non-platinum-based catalytic metal is improved. A fuel cell includes a flat membrane electrode assembly sandwiched between a separator and a separator. The membrane electrode assembly 50 includes a solid polymer electrolyte membrane 20, an anode 22, and a cathode 24. The cathode 24 has a laminate composed of a cathode catalyst layer 30 and a cathode gas diffusion layer 32. It is composed of an ionomer, carrier particles, a catalyst metal, and a SiO 2 component. The SiO 2 component covers at least part of the periphery of the catalyst metal and the support particles. The content of the SiO 2 component is 1 to 30% by mass with respect to the reference mass (the total mass of the carrier particles, the catalyst metal, and the SiO 2 component), and the volume resistivity of the cathode catalyst layer 30 is 1. ~ 300 Ω · cm or less. [Selection] Figure 1 |