Patent ID: 7670710

Claim:
A fuel cell formed by stacking an electrolyte electrode assembly and separators alternately, said electrolyte electrode assembly including an anode, a cathode, and an electrolyte interposed between said anode and said cathode, wherein said separator includes first, second and third plates which are stacked together; said third plate is provided between said first and second plates for dividing a space between said first and second plates into a fuel gas channel for supplying a fuel gas to said anode, and an oxygen-containing gas channel for supplying an oxygen-containing gas to said cathode; said first plate is interposed between said fuel gas channel and said anode to form a fuel gas pressure chamber that expands with an increased internal pressure when said fuel gas is supplied into said fuel gas pressure chamber such that said first plate tightly contacts said anode under pressure; said second plate is interposed between said oxygen-containing gas channel and said cathode to form an oxygen-containing gas pressure chamber that expands with an increased internal pressure when said oxygen-containing gas is supplied into said oxygen-containing gas pressure chamber such that said second plate tightly contacts said cathode under pressure; and said third plate includes a plurality of protrusions, such that the fuel gas pressure chambers are provided in the recesses defined by the protrusions of the third plate, between said first and third plates.