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Effect of sintering temperature on electrochemical performance of porous SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) oxygen electrodes for solid oxide cells
Abstract
This work evaluates the effects of the sintering temperature (800 °C, 900 °C, 1000 °C) of SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) porous electrodes on their electrochemical performance as potential oxygen electrode materials of solid oxide cells. The materials were prepared by a solid-state reaction method and revealed the expected cubic perovskite structure. After milling, the powders were characterised by a sub-micrometre particle size with high sinter-activity. It was shown that the lowest area specific resistance was achieved after sintering SrTi0.65Fe0.35O3 electrodes at 1000 °C, and SrTi0.5Fe0.5O3 and SrTi0.30Fe0.70O3 electrodes at 800 °C, which can be considered to be a relatively low temperature. In general, EIS measurements showed that increasing the Fe content results in lowered electrode polarisation and a decrease of the series resistance. Even though the studied materials have much lower total conductivities than state-of-the-art electrode materials (e.g. (La,Sr)(Co,Fe)O3), the polarisation resistances obtained in this work can be considered low.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
no. 24,
pages 873 - 882,
ISSN: 1432-8488 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Mroziński A., Molin S., Jasiński P.: Effect of sintering temperature on electrochemical performance of porous SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) oxygen electrodes for solid oxide cells// JOURNAL OF SOLID STATE ELECTROCHEMISTRY -Vol. 24, (2020), s.873-882
- DOI:
- Digital Object Identifier (open in new tab) 10.1007/s10008-020-04534-0
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
Referenced datasets
- dataset SEM images of symmetrical cell interface with SrTi0.30Fe0.70O3-d electrode and CGO-20 substrate in function of sintering temperature
- dataset Area specific resistance (at 800 °C - 500 °C) of the SrTi0.50Fe0.50O3 porous oxygen electrodes sintered at different temperatures
- dataset SEM image and EDS map of SrTi0.50Fe0.50O3-d powder aglomerate
- dataset SEM image and EDS map of SrTi0.65Fe0.35O3-d powder aglomerate
- dataset SEM images of symmetrical cell interface with SrTi0.65Fe0.35O3-d electrode and CGO-20 substrate in function of sintering temperature
- dataset Distribution of Relaxation Times analysis results of impedance measured in function of temperature on porous SrTi0.50Fe0.50O3-d oxygen electrode sintered at 800 °C
- dataset SEM images of symmetrical cell interface with SrTi1-xFexO3-d electrodes and CGO-20 substrate sintered at 800 °C
- dataset SEM image and EDS map of SrTi0.50Fe0.50O3-d porous electrode sintered at 800 °C
- dataset Series resistance (at 800 °C - 500 °C) of the SrTi0.50Fe0.50O3 porous oxygen electrodes sintered at different temperatures
- dataset Influence of sintering temperature of porous SrTi0.30Fe0.70O3-d oxygen electrode on electrochemical impedance spectroscopy spectra measured at 800 °C
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