List of coating candidates for air and fuel sides of interconnector plates (D3.1)
Solid oxide electrolysers (SOEL) are critical for efficient hydrogen production but face challenges such as chromium (Cr)-poisoning and materials degradation, specifically in their interconnector components made of ferritic stainless steels (FSS).
WP3 focuses on developing optimized coatings for both the air and fuel sides of these interconnectors to improve electrical performance and extend lifespan.
This deliverable D3.1 focuses on listing potential coating candidates that have shown promising results, as reported in various scientific journals, for use on both on fuel and airside of the SOEL stack.
On the air side, Cu-doped spinel coatings have emerged as promising candidates, offering excellent Cr-barrier properties and superior electrical conductivity, while also addressing ethical and sustainability concerns associated with cobalt usage.
On the fuel side, a multi-layered approach involving ceria (CeO2) as a diffusion barrier has been proposed to mitigate issues like nickel diffusion into FSS and to maintain electrical and mechanical compatibility. The coatings aim to balance high technical performance with material sustainability, offering a pathway for the development of more durable and efficient SOEL systems.