Electrophoretic deposition of (Mn,Co)3O4 spinel coating for solid oxide fuel cell interconnects

► For the spinel coatings generated using smaller voltage than 400 V, the interconnect surfaces exhibit good packing behavior and high conductivity. ► The reduced atmosphere during sintering has a beneficial impact on the minimizing chromia subscale formation and thus reducing the area specific resistance (ASR) of the coated interconnects. ► A more stable long-term performance is achieved for the spinel coating sintered in H2/H2O atmosphere with thin chromia sub-scale and no Cr penetration. ► Based on the current results, EPD followed by reduced-atmosphere sintering is a fast and economic way to deposit (Mn,Co)3O4 coating for SOFC interconnect applications.