Assesment of (Mn,Co)₃3O₄powders for possible coating material for SOFC/SOEC interconnects

Sintering of MnCo2O4 coatings prepared by electrophoretic deposition

“…According to the EDS analysis (inset in Figure 1A), the ratio of Co to Mn in the raw powder is higher than 2 and the raw powder contains Al, most probably in the form of Al2O3 residues after milling, these were however not detected by XRD, where a phase pure cubic spinel structure is found. Powders were deposited on steel substrates according to procedure described in [8]. First, results from sintering in air shall be discussed.…”

“…The deposition was carried out at 60V for 1 minute using a symmetrical setup with a stainless steel counter electrodes placed 15 mm from the sample. The procedure has been described in details in [8]. After the deposition, the coated samples were sintered in a tube furnace under a flowing gas, as described in the results section.…”

Low temperature processed MnCo2O4 and MnCo1.8Fe0.2O4 as effective protective coatings for solid oxide fuel cell interconnects at 750 °C

“…In the literature many methods for fabrication of protective coatings were reported, including sol-gel [30], spraying process (including plasma processes) [39], slurry coating [32], screen-printing [40], electrophoretic deposition [41][42][43][44], thermal evaporation [33] and finally electroplating [45]. These methods result in different microstructures of the as-prepared coatings and require different level of post application processing.…”

Method to Measure Area Specific Resistance and Chromium Migration Simultaneously from Solid Oxide Fuel Cell Interconnect Materials

“…Of the various coatings reported in literature, conductive spinels such as manganese‐cobalt oxide and manganese‐cobalt‐iron oxide are the most promising alternatives due to their high conductivity, excellent chromium retention capability and a thermal expansion coefficient closely matching the one of the steel , . Similar protective coatings are also studied for the use in solid oxide electrolyzer (SOE) stacks to prevent chromium migration .…”