Development of SOFC Interconnects Based on Industrial Steels with Oxide Coating

This work suggests a method for obtaining heat-resistant protective coatings for 08Kh17T stainless steel that can be used as interconnect material for solid oxide fuel cells. The suggested approach is based on the layer-by-layer precipitation of nickel, cobalt, and manganese, followed by heat treatment in a vacuum and oxidizing atmosphere. XRD results show that the coatings consist of a mixture of metal oxides and compounds with a spinel structure. The obtained coatings demonstrate high resistance to high-temperature oxidation for 100 h. The coating with the ratio of the thicknesses of the cobalt and manganese layers of 1.5/0.5 mu m obtained by electrodeposition is the most stable. The specific electrical resistance of this coating is 3.50 center dot 10(-3) omega center dot cm(2) after 100 h of exposure at 850 degrees C, which meets the requirements for SOFC interconnect materials.

Automated summary

This study proposes a method to produce heat-resistant protective coatings for 08Kh17T stainless steel, which can serve as interconnect materials for solid oxide fuel cells. The method involves layer-by-layer precipitation of nickel, cobalt, and manganese, followed by heat treatment in a vacuum and oxidizing atmosphere. XRD analysis reveals that the coatings consist of a mixture of metal oxides and compounds with a spinel structure. The obtained coatings exhibit excellent resistance to high-temperature oxidation for 100 hours, with the coating having a cobalt to manganese layer thickness ratio of 1.5/0.5 μm obtained through electrodeposition showing the highest stability. The specific electrical resistance of this coating after 100 hours of exposure at 850 degrees Celsius is 3.50 x 10(-3) omega cm(2), which meets the requirements for SOFC interconnect materials.