Patent ID: 6740442
Filing Date: 2004-05-25
Classification: H01M,Y02E

Abstract:
A single cell of a flat plate type solid oxide fuel cell comprising: a first electrode member consisting of a porous substrate through which a fuel gas or air can fully pass; an electrolyte film formed on either a front surface or a back surface of said first electrode member; a second electrode member formed on said electrolyte film; and a separator film formed on the other surface of said first electrode member, wherein said first electrode member is one of a fuel electrode and an air electrode, and said second electrode member is the other one of said fuel electrode and said air electrode, and said first electrode member itself is used as a gas flow path, both front and back surfaces of said first electrode member are covered with said electrolyte film and said separator film respectively; at least one of a part of said electrolyte film and a part of said separator film has a seal portion which covers a part of side surfaces between said electrolyte film and said separator film of said first electrode member and functions as a gas seal film, said seal portion including a side film portion and a corner film portion, said side film portion covers each entire area of side surfaces of one of two pairs of opposed side surfaces of said first electrode member and seals said covered side surfaces to prevent a gas from escaping, said corner film portion covers a corner portion of each end portion of the other pair of opposed side surfaces of said first electrode member, and a part between these corner film portions is defined as a gas inflow/outflow opening.