Book/Dissertation / PhD Thesis

FZJ-2026-04132

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cost-reduced and Sustainable Interconnects and their Coatings for Solid Oxide Cells

Hilger, M. (Corresponding author)FZJ*

2026
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich
ISBN: 978-3-95806-989-3

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Please use a persistent id in citations: doi:10.34734/FZJ-2026-04132

Abstract: Transitioning towards greenhouse-gas-neutral energy systems and economies relies critically on renewable energy technologies. Hydrogen is indispensable both as an energy carrier and as a chemical reactant, and water electrolysis powered by renewable sources is a key pathway. Due to their high efficiency, solid oxide cells (SOCs) are a particularly attractive technology. At the same time, the high operating temperatures restrict material choices and impose severe impact on components. Together with the still limited competitiveness compared with other electrolyzer technologies, this is a central reason why large-scale industrial deployment was not achieved yet. Steel components play a major role in this context, especially the interconnect, which accounts for a substantial share of material use and cost.Within the EU-funded project NOUVEAU, this work targeted the development of interconnect concepts towards lower costs and improved sustainability. The focus was on both the interconnect steel and the required protective coatings. Beyond mitigating steel oxidation, suppressing the release of volatile Cr(VI) species is essential, as these cause severe degradation of the air electrode (Cr poisoning). Based on the state of the art and the reference system established in Jülich, three strategies were pursued: (i) enabling thin-sheetinterconnect designs by employing non-destructive coating methods, (ii) reducing coating thickness while maintaining protectivity, and (iii) using lower-cost and more environmentally friendly materials, including conventional steels and Co-free coating compositions. ...

Note: Dissertation, RWTH Aachen University, 2026

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IMD-2)

Research Program(s):

1. 1231 - Electrochemistry for Hydrogen (POF4-123) (POF4-123)

Appears in the scientific report 2026

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Database coverage:
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