Patent ID: 8663869
Filing Date: 2014-03-04
Classification: H01M,Y02E

Abstract:
1. A solid oxide fuel cell (SOFC) stack, comprising: a plurality of SOFCs; a plurality of interconnects, each interconnect containing a conductive perovskite layer coated on an air side of the interconnect, and each interconnect containing a fuel inlet opening through the interconnect which forms a portion of a fuel inlet riser; and a first seal located on the air side of each interconnect adjacent to the conductive perovskite layer between a first edge surface of the conductive perovskite layer and the fuel inlet opening; wherein: the stack is internally manifolded for fuel; the conductive perovskite layer on each interconnect is not exposed in the fuel inlet riser; the conductive perovskite layer is not located adjacent to at least the fuel inlet opening on the air side of each interconnect; the conductive perovskite layer is offset by a distance from the at least the fuel inlet opening; an interior opening in the first seal is located over the fuel inlet opening in the interconnect to form a first portion of the fuel inlet riser; and the first seal contacts an electrolyte of an adjacent SOFC adjacent to a fuel inlet opening in the electrolyte, such that the fuel inlet opening in the electrolyte, an interior opening in the first seal and the fuel inlet opening in the interconnect form a second portion of the fuel inlet riser, such that the conductive perovskite layer does not form a sidewall of the fuel inlet riser and is not exposed to fuel flow in the fuel inlet riser.