Authors:
Mari Carmen Monterde Gascón (1), Lucile Bernadet (2), Jose Antonio Calero Martinez (1), Emilio Jimenez-Piqué (3), Albert Tarancón (2,4), Marc Torrrell Faro (2)
1- AMES PM Tech, Pol. Ind. Les Fallulles, Camí de Can Ubach, 8, 08620 Sant Vicenç dels Horts, Barcelona (Spain)
2- IREC, Catalonia Institute for Energy Research, Dept. Advanced Materials for Energy Jardins de les Dones de Negre 1, 2ª pl. 08930 Sant Adrià de Besòs Barcelona (Spain)
3- Universitat Politécnica de Catalunya, department of Material Science and Engineering., C/Eduard Maristany 16, 08019 Barcelona (Spain)
4- ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
Abstract:
Manganese cobalt oxide spinel ink applied by roll painting on SUS445 steel interconnects are the state-of-the-art coating materials as protective layer to volatile chromium species. MnCo coatings are often sintered in two stages, involving reducing and oxidizing atmospheres, to ensure the desired density. This work shows the design, development and optimization of a functional metal interconnect fabricated by conventional powder metallurgy for solid oxide fuel cell and electrolysers systems (SOFC and SOEL). The efficiency of the final interconnects is evaluated by the electrochemical test of single repeating unit and completed by a microstructural characterisation. The polarization I-V curve obtained in solid oxide cell mode at 800°C shows a current density around 0.9 A/cm2. The degradation results below 1%/Kh after 750h at 800°C under 10A working in solid oxide electrolysis mode show an efficient barrier layer coating to volatile chromium species. The obtained results show the efficiency of the coating process and the functionality of the designed interconnector.
DOI:
https://doi.org/10.59499/EP235783264