Efficiencies of cobalt- and copper-based coatings applied by different deposition processes for applications in intermediate-temperature solid oxide fuel cells
Journal article, 2022

Solid Oxide Fuel Cells (SOFCs) are electrochemical conversion devices that produce electricity directly by oxidising a fuel. The interconnects between the individual cells need to be coated to limit Cr(VI) evaporation from the steel and to preserve electrical conductivity. Physical Vapour Deposition (PVD)-coated samples with Ce/Co, Ce/Cu, and Ce/MnCu, and Thermal Spray (TS)-coated Mn/Co, Cu and Mn/Cu and AISI 441 steel samples were exposed at 650 °C for up to 1000 h. The PVD Ce/Co and Ce/Cu coatings, as well as the TS Mn/Co coating, exhibited the formation of a thin protective Cr2O3 scales underneath the coating. These samples also exhibited the lowest area-specific resistance (ASR) values. The remainder of the samples exhibited much higher mass gains and higher ASR values. Cr(VI) evaporation measurements showed that all the coatings behaved approximately the same despite the PVD coatings being only about one-tenth of the thickness of the TS coatings.

Interconnect

Thermal spray

SOFC

Cu coatings

Area specific resistance

PVD

Author

Matthieu Tomas

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Vijayshankar Asokan

Chalmers, Chemistry and Chemical Engineering, Energy and Material

J. Puranen

ELCOGEN OY

Jan-Erik Svensson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Jan Froitzheim

Chalmers, Chemistry and Chemical Engineering, Energy and Material

International Journal of Hydrogen Energy

0360-3199 (ISSN)

Vol. 47 76 32628-32640

Subject Categories

Manufacturing, Surface and Joining Technology

Materials Chemistry

Other Materials Engineering

DOI

10.1016/j.ijhydene.2022.07.168

More information

Latest update

3/7/2024 9