Patent ID: 7651805

Claim:
A fuel cell stack comprising: a plurality of fuel cell units, wherein each of the fuel cell units includes: a membrane electrode assembly having a solid polymer electrolyte membrane, an anode side diffusion electrode disposed at one side of the solid polymer electrolyte membrane, and a cathode side diffusion electrode disposed at the other side of the solid polymer electrolyte membrane; a pair of separators which hold the membrane electrode assembly; and an adhesive seal, provided between the separators, which was liquid sealant at the time of application, wherein the adhesive seal binds the separators together while sealing a periphery of the membrane electrode assembly; wherein the plurality of the fuel cell units are stacked in a stacking direction to form the fuel cell stack; and a non-adhesive seal in physical contact with the separator of one fuel cell unit and the separator of an adjacent fuel cell unit, wherein the non-adhesive seal seals an area between the separator of the one fuel cell unit and the separator of the adjacent fuel cell unit, and wherein the non-adhesive seal is made of a thermosetting material.