Patent ID: 7517605
Filing Date: 2009-04-14
Classification: H01M,Y02E

Abstract:
1. An oxide fuel cell comprising: a fuel electrode layer and an oxidant electrode layer on opposite surfaces of a solid electrolyte layer, respectively; a porous fuel electrode current collector and a porous oxidant electrode current collector positioned outside said fuel electrode layer and said oxidant electrode layer, respectively; a first separator, positioned outside said porous fuel electrode current collector, for allowing a fuel gas to be supplied from said first separator to said fuel electrode layer through said porous fuel electrode current collector, said first separator having a surface in contact with said porous fuel electrode current collector; and a second separator, positioned outside said porous oxidant electrode current collector, for allowing an oxidant gas to be supplied from said second separator to said oxidant electrode layer through said porous oxidant electrode current collector, said second separator having a surface in contact with said porous oxidant electrode current collector, wherein a peripheral part of said surface of said first separator protrudes towards a peripheral part of said porous fuel electrode current collector so that a thickness of said peripheral part of said porous fuel electrode current collector is smaller than a thickness of any other portion of said porous fuel electrode current collector to thereby increase a linear velocity of the fuel gas in said peripheral part of said porous fuel electrode current collector, and a peripheral part of said surface of said second separator protrudes towards a peripheral part of said porous oxidant electrode current collector so that a thickness of said peripheral part of said porous oxidant electrode current collector is smaller than a thickness of any other portion of said porous oxidant electrode current collector to thereby increase a linear velocity of the oxidant gas in a peripheral part of said porous oxidant electrode current collector.