Abstract
A method is developed for modifying the surface of current collectors in solid-oxide fuel cells (SOFC) prepared from ferrite stainless steel (Crofer22APU). Diffusion of the protective coating material into the Crofer22APU bulk and reverse diffusion of steel components into the coating are studied. The cross-sectional microstructure and composition are studied by the electron-microscopic technique. The elemental composition of the junction between the current collector and the lanthanum-strontium manganite cathode is studied depending on the time of service-life tests in the SOFC working mode (50–6000 h). The formation of the Cr2O3 oxide islet structure on the current collector surface at the steel/coating interface is observed. It is shown that the mutual diffusion of coating components (Ni) and Crofer22APU steel together with the redox reaction at the interface prevent the chromium diffusion to the surface and protect the steel current collector from oxidation.
Similar content being viewed by others
References
Zhuand, W.Z. and Deevi, S.C., Mater. Sci. Eng., A, 2003, vol. 348, p. 227.
Fujita, K., Hashimoto, T., Ogasawara, K., Kameda, H., and Matsuzak, Y., I., and Sakurai, T., J. Power Sources, 2004, vol. 131, p. 270.
Konysheva, E., Penkalla, H., Wessel, E., Mertens, J., Seeling, U., Singheiser, L., and Hilpert, K., J. Electrochem. Soc., 2006, vol. 153, p. 765.
Jiang, S.P., Zhang, J.P., and Zheng, X.G., J. Eur. Ceram. Soc, 2002, vol. 22, p. 361.
Wu, S.P. and Liu, X., J. Mater. Sci. Technol., 2010, vol. 26, p. 293.
Zhu, W.Z. and Deevi, S.C., Mater. Res. Bull., 2003, vol. 38, p. 957.
Ledukhovskaya, N., Frolova, E., Strukov, G., Matveev, D., and Bredikhin, S., ECS Trans., 2009, vol. 25, p. 1523.
Bredikhin, S.I., Zhokhov, A.A., Frolova, E.A., Ledukhovskaya, N.V., Kuritsyna, I.E., Sinitsyn, V.V., and Korovkin, E.V., Russ. J. Electrochem., 2009, vol. 45, p. 555.
Sauchuk, V., Megel, S., Girdauskaite, E., Trofimenko, N., Kusnezoff, M., and Michaelis, A., Russ. J. Electrochem., 2011, vol. 47, p. 522.
Ledukhovskaya, N.V., Strukov, G.V., and Bredikhin, S.I., RF Patent 2011123307 (2012).
Fontana, S., Amendola, R., Chevalier, S., Piccardo, P., Caboche, G., Viviani, M., Molins, R., and Sennour, M., J. Power Sources, 2007, vol. 171, p. 652.
CRS Handbook of Chemistry and Physics, 87th Edition, Lide, D.R., Ed., Boca Raton: Taylor & Francis, 2007.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.V. Demeneva, S.I. Bredikhin, 2014, published in Elektrokhimiya, 2014, Vol. 50, No. 8, pp. 808–813.
This publication was prepared based on a lecture delivered at the All_Russian Conference with international participation “Fuel Cells and Power Plants,” Chernogolovka, 2013.
Rights and permissions
About this article
Cite this article
Demeneva, N.V., Bredikhin, S.I. Oxide film formation and diffusion processes in near-surface layers of current collectors in solid oxide fuel cells. Russ J Electrochem 50, 725–729 (2014). https://doi.org/10.1134/S1023193514080035
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1023193514080035