Investigation of protective coatings on ferritic stainless steel solid oxide fuel cells interconnects fabricated by powder metallurgy(SOFCs)

摘要

Solid oxide fuel cells (SOFCs) are the most efficient alternative technology for conversion of chemical fuels such as hydrogen or hydrocarbon directly into electrical power [1-3]. The market penetration of the SOFC still requires some efforts related with the cell stability and cost-effectiveness. One of the key factors to improve the system stability and reduce the cost is the development of new metallic interconnect plates fabrication techniques and propose new materials. The role of the interconnect in a SOFC stack is to collect the electrons generated connecting the anode side with the cathode side of the adjacent single cell while separate fuel and oxidant gases as a support of the sealant [4, 5]. Metallic interconnects are promising candidates for SOFC systems operating at temperatures below 800 °C. They offer high electrical and thermal conductivities besides compatible thermal expansion coefficients (TEC) with the other components, a relatively low area specific resistance (ASR) and easy in conformability [6, 7].