Patent ID: 8431261

Claim:
A fuel cell component, comprising: a fuel electrode configured to be supplied with fuel and being porous and electrically conductive; a proton conducting film including a proton conductivity; and an oxidant electrode configured to be supplied with oxidant and being porous and electrically conductive; a plurality of fuel cell component bodies each including a surface; a recessed region of each fuel cell component body recessed relative to the surface, the recessed region including a bottom surface and side surfaces that extend continuously from a perimeter of the bottom surface of the recessed region to the surface of the fuel cell component body; and an identification information display portion on the bottom surface of the recessed region, wherein the recessed region is formed at a same position on each of the plurality of fuel cell component bodies, and the bottom surface of the recessed region of one of the plurality of fuel cell component bodies faces an adjacent fuel cell component body of the plurality of fuel cell component bodies, wherein the fuel cell component is a membrane electrode assembly, and wherein the fuel electrode, the proton conducting film, and the oxidant electrode are stacked in order; and wherein at least one of the fuel electrode, the proton conducting film, and the oxidant electrode includes the recessed region and the identification information display portion is provided at the recessed region.