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Wednesday, October 20, 2004 - 11:00 AM
FUEL 7.6

Investigation of Interfacial Interactions and Electrical Resistance between Conductive Oxide Cathodes and Alloy Interconnects in SOFCs

G. Xia, Z. G. Yang, S. Simner, J. Stevenson, Pacific Northwest National Laboratory, Richland, WA

In intermediate and low temperature SOFCs, the interconnects are typically made from a high temperature oxidation resistant alloy which must be interfaced with the conductive oxide cathodes. For a stable performance and maximum stack power output, the cathode/interconnect interface must be stable and offer a minimum electrical resistance that arises from the scale growth on the alloy interconnects, interfacial interactions and contacts between metal interconnects and oxide cathodes. In this work, a series of perovskite conductive oxides that are potential cathode candidates were selected and their chemical compatibility and interfacial electrical resistance with the ferritic stainless steel Crofer22 APU, a candidate interconnect alloy, were investigated. This paper will present details of this study.

Summary: In this work, a series of perovskite conductive oxides that are potential cathode candidates were selected and their chemical compatibility and interfacial electrical resistance with the ferritic stainless steel Crofer22 APU, a candidate interconnect alloy, were investigated. This paper will present details of this study.