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Experimental review of the performances of protective coatings for interconnects in solid oxide fuel cells

Abstract

Ferritic stainless steel interconnects are used in solid oxide fuel cells; however, coatings are required to improve their performance. Although several types of coatings have been proposed, they have been scarcely investigated under similar conditions. This study compares the characteristics of uncoated Crofer 22 APU and eight different coatings on Crofer 22 APU for up to 3000 h at 800 ◦C. The coatings were deposited at various research laboratories around the world, and the experiments were performed at Chalmers University of Technology, Sweden. Cross-sections of the samples were analysed using scanning electron microscopy and energy-dispersive x-ray spectroscopy. The (Co,Mn)-based coated steels showed more than 50-fold lower chromium evaporation and at least 3 times thinner Cr2O3 scale thickness compared to uncoated steel. The coated steel samples showed lower area-specific resistance (ASR) values than the uncoated steel after 3000 h of exposure, irrespective of the coating thickness, composition and deposition method.

Citations

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Authors (13)

Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
JOURNAL OF POWER SOURCES no. 568,
ISSN: 0378-7753
Language:
English
Publication year:
2023
Bibliographic description:
Reddy M. J., Kamecki B., Talic B., Zanchi E., Smeacetto F., Hardy J. S., Choi J. C., Mazur Ł., Vaßen R., Basu S. N., Brylewski T., Svensson J., Froitzheim J.: Experimental review of the performances of protective coatings for interconnects in solid oxide fuel cells// JOURNAL OF POWER SOURCES -Vol. 568, (2023), s.232831-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.jpowsour.2023.232831
Sources of funding:
  • COST_FREE
Verified by:
Gdańsk University of Technology

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