Patent ID: 7566509
Filing Date: 2009-07-28
Classification: H01M,Y02E,Y02P

Abstract:
1. A tubular fuel cell in which each of cells comprises a first porous inter-connector membrane, a first electrode, a solid electrolyte membrane, a second electrode, and a second porous inter-connector membrane laminated in this order from a lower layer, wherein the first porous inter-connector membrane and the second porous inter-connector membrane between adjacent cells are connected to each other through an intermediate inter-connector membrane that comprises at least one layer composed of a dense electrically conductive membrane; wherein the intermediate inter-connector membrane comprises a single dense electrically conductive membrane or a porous electrically conductive membrane and an upper layer dense electrically conductive membrane and a lower layer dense electrically conductive membrane between which the porous electrically conductive membrane is sandwiched; wherein an auxiliary restraint membrane, which comprises a material having a thermal expansion coefficient smaller than that of the first and second porous inter-connector membranes, annularly covers the solid electrolyte membrane while exposing the connecting portion of the single dense electrically conductive membrane or the upper layer dense electrically conductive membrane which portion is connected to the second porous inter-connector membrane.