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Multifunctional Nano-Coatings for SOFC Interconnects

Jan Froitzheim (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Jan-Erik Svensson (Institutionen för kemi- och bioteknik, Oorganisk miljökemi)
Solid Oxide Fuel Cells 12. 12th International Symposium on Solid Oxide Fuel Cells (SOFC), Montreal, May 1-6, 2011 (1938-5862). Vol. 35 (2011), 1, p. 2503-2508.
[Konferensbidrag, refereegranskat]

Chromium evaporation from metallic interconnects in SOFCs is commonly poisoning the cathode of SOFCs. To reduce chromium evaporation, rather thick coatings have been deposited using various coating techniques. In this study a 22% Cr ferritic steel has been coated with multilayered nano coatings. The best coatings combine a Cr retention layer (800nm Co) with a 10nm layer of Ce that reduces the corrosion rate of the metallic interconnect. Such coatings might be a cost efficient way to meet the required lifetime targets for SOFC interconnects. The Cr evaporation measurements are carried out with a recently developed denuder technique which allows time resolved quantification of volatile chromium species. Downstream of the samples a denuder tube is placed which collects any CrO2(OH)(2) evaporating from the samples.

Nyckelord: oxide fuel-cells, ferritic steels, oxidation



Denna post skapades 2012-04-10. Senast ändrad 2017-09-14.
CPL Pubid: 156506

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)

Ämnesområden

Kemi

Chalmers infrastruktur