Patent ID: 7759016

Claim:
A cell stack of a flat plate type solid oxide fuel cell, comprising: a plurality of single cells arranged in series in a lamination direction to form a laminated body; and a conductive spacer provided between adjacent cells, said spacer being a porous substrate; each single cell comprising: a first electrode member consisting of a first porous substrate having only a plurality of minute holes arranged randomly therein through which all of a fuel gas or air can pass directly to the first electrode member and wherein the porous substrate is the only gas flow path in the first electrode member, said porous substrate having a sufficient gas flow property; a solid electrolyte film formed on either a front surface or a back surface of said first electrode member; a second electrode layer formed on said solid electrolyte film; a separator film formed on the other surface of said first electrode member; said first electrode member being one of a fuel electrode and an air electrode and said second electrode layer being the other one of said fuel electrode and said air electrode; and a seal portion for covering all side surfaces of said first electrode member, said seal portion being scraped off from two opposing areas of two of said side surfaces to define an inlet and an outlet opening for one of a fuel gas and air supplied to the cell, said plurality of minute holes arranging for a flow of said fuel gas or air toward said outlet opening from said inlet, and for a flow of said fuel gas or air in a vertical direction and in a horizontal direction locally; wherein the entire first electrode member forms one of a fuel flow path and an air flow path through the cell with no through-passages; and said porous substrate forming said spacer consisting of a material which is the same as that of said second electrode layer.