Patent ID: 7422822
Filing Date: 2008-09-09
Classification: H01M,Y02E,Y02P

Abstract:
1. A single cell for a low operating temperature solid oxide fuel cell, the single cell comprising: a first solid electrolyte having an oxide ion conductivity at 800° C. of at least 0.015 S/cm and a bending strength of at least 600 MPa; a fuel electrode having a first surface bonded to a first side of the first solid electrolyte, the fuel electrode comprising a cermet of a catalyst and a second solid electrolyte having an oxide ion conductivity at 800° C. of at least 0.08 S/cm; an air electrode bonded to a second side of the first solid electrolyte, the air electrode comprising a compound of a first perovskite type oxide with a third solid electrolyte; and an intermediate layer comprising a fourth solid electrolyte interposed between a first surface of the air electrode and the second side of the first solid electrolyte; wherein the first perovskite type oxide is at least one perovskite type transition metal oxide selected from the group consisting of La wherein the third solid electrolyte is a mixed solid electrolyte comprising one of yttria-stabilized zirconia containing 8 to 10 mol % Y