Electrical contacts between cathodes and metallic interconnects in solid oxide fuel cells

To minimize electrical resistance and maximize power output, contact layers are often applied between interconnects and electrodes during construction of a SOFC stack. This paper discusses the materials requirements for the electrical contact layers, particularly between cathodes and metallic interconnects. The results from the resistance measurements using simulated cathode/interconnect structures are reported and correlated to interfacial interactions occurring between the metallic interconnect and the contact materials, particularly perovskites.