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Deposition and Characterization of Y-doped CaZrO sub(3) Electrolyte Film on a Porous SrTi sub(0.8)Fe sub(0.2)O sub(3- delta ) Substrate

The fabrication, the characterization and the electrochemical performance of a solid electrolyte film of Y-doped CaZrO sub(3) deposited on a porous SrTi sub(0.8)Fe sub(0.2)O sub(3- delta ) substrate are studied in the present work. A dense 6- mu m-thick film of the electrolyte is prepared by multi-s...

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Published in:	Electrochimica acta 2016-06, Vol.202, p.39-46
Main Authors:	Dunyushkinaa, LA, Pankratova, A A, Gorelova, V P, Brouzgoub, A, Tsiakarasa, P
Format:	Article
Language:	English
Subjects:	Deposition Electrochemical analysis Electrolytes Electrolytic cells Impedance Platinum Substrates X-rays
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description	The fabrication, the characterization and the electrochemical performance of a solid electrolyte film of Y-doped CaZrO sub(3) deposited on a porous SrTi sub(0.8)Fe sub(0.2)O sub(3- delta ) substrate are studied in the present work. A dense 6- mu m-thick film of the electrolyte is prepared by multi-step chemical solution deposition. Phase purity, concentrations of the elements and microstructure of the film are characterized by means of X-ray diffraction, energy-dispersive X-ray spectroscopy and scanning electron microscopy. The results indicate interdiffusion between the film and the substrate. For the electrochemical characterization of the electrolyte film a gas concentration cell Pt/STF/CZY-film/Pt is fabricated. Open circuit voltage (OCV), impedance spectra (EIS) and current-voltage characteristics are measured at the oxygen concentration cell in the temperature range from 500 to 600 degree C. The ionic transport numbers in the electrolyte film determined from the impedance and OCV data are found to vary within 0.93-0.97 interval. This is significantly higher than the ratio E sub(m)/E sub(N) between the measured OCV value (E sub(m)) and the theoretical EMF value (E sub(N)), which determines the transport numbers in the case of non-polarizable electrodes. It is concluded that this difference is caused mainly by the high polarization resistance of the cell.
doi_str_mv	10.1016/j.electacta.2016.03.120
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subjects	Deposition Electrochemical analysis Electrolytes Electrolytic cells Impedance Platinum Substrates X-rays
title	Deposition and Characterization of Y-doped CaZrO sub(3) Electrolyte Film on a Porous SrTi sub(0.8)Fe sub(0.2)O sub(3- delta ) Substrate
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