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|Features of electrophoretic deposition of a ba-containing thin-film proton-conducting electrolyte on a porous cathode substrate
|Features of electrophoretic deposition of a ba-containing thin-film proton-conducting electrolyte on a porous cathode substrate / E. Kalinina, A. Kolchugin, K. Shubin, et al. — DOI 10.3390/APP10186535 // Applied Sciences (Switzerland). — 2020. — Vol. 10. — Iss. 18. — 2812.
|This paper presents the study of electrophoretic deposition (EPD) of a proton-conducting electrolyte of BaCe0.89Gd0.1Cu0.01O3-Δ (BCGCuO) on porous cathode substrates of LaNi0.6Fe0.4O3-Δ (LNFO) and La1.7Ba0.3NiO4+Δ (LBNO). EPD kinetics was studied in the process of deposition of both a LBNO sublayer on the porous LNFO substrate and a BCGCuO electrolyte layer. Addition of iodine was shown to significantly increase the deposited film weight and decrease the number of EPD cycles. During the deposition on the LNFO cathode, Ba preservation in the electrolyte layer after sintering at 1450 °C was achieved only with a film thickness greater than 20 μm. The presence of a thin LBNO sublayer (10 μm) did not have a pronounced effect on the preservation of Ba in the electrolyte layer. When using the bulk LBNO cathode substrate as a Ba source, Ba was retained in a nominal amount in the BCGCuO film with a thickness of 10 μm. The film obtained on the bulk LBNO substrate, being in composition close to the nominal composition of the BCGCuO electrolyte, possessed the highest electrical conductivity among the films deposited on the various cathode substrates. The technology developed is a base step in the adaptation of the EPD method for fabrication of cathode-supported Solid Oxide Fuel Cells (SOFCs) with dense barium-containing electrolyte films while maintaining their nominal composition and functional characteristics. © 2020 by the authors.
SOLID OXIDE FUEL CELL
|This research received no external funding. This work was performed in the framework of the IEP UB RAS state assignment (EPD technology development) and the IHTE UB RAS budget task (SOFC technology development). The XRD and microstructure study was carried out using the equipment of the Shared Access Center "Composition of compounds" (Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia). The authors acknowledge Zhuravlev, V.D., the head of the Laboratory of chemistry of compounds of rare-earth elements (Institute of Solid State Chemistry, UBRAS,Yekaterinburg, Russia), Bogdanovich, N.M., scientific researcher of the Laboratory of solid oxide fuel cells (IHTE UB RAS), and Lyagaeva, J.G., senior scientific researcher of the Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes (IHTE UB RAS) for the development of the synthesis methods used in this study.
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