Influence of microstructure and applied current on the electrical conductivity of SmBaCo2O5+d cathode in solid oxide fuel cell

Song, Kyeong Eun and Lee, Jae Woong and Lim, Yu Ri and Baek, Seung Wook and Shin, Tae Ho and Lee, Shinku and Schlegl, Harald and Kim, Jung Hyun (2022) Influence of microstructure and applied current on the electrical conductivity of SmBaCo2O5+d cathode in solid oxide fuel cell. International Journal of Hydrogen Energy, 47 (35). pp. 15875-15886. ISSN 0360-3199

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In this study, the electrical conductivity of SmBaCo2O5+d (SBCO) is measured and analyzed with respect to the microstructure of the analyzed samples. The microstructure is influenced by the sintering temperature and by the precise composition of the composite cathode. Difference in the electrical conductivity at different applied current is investigated. The value of the electrical conductivity of SBCO sintered at 1150 °C was about 1024 S/cm at 600 °C, which was the highest compared to other samples sintered at lower temperatures. The electrical conductivities of porous microstructural SBCO sintered at 1150 °C with an addition of 10 wt% carbon black and of a composite cathode comprised of SBCO and Ce0.9Gd0.1O2 (CGO91) at a ratio of 1.9:0.1 were 256 and 525 S/cm at 600 °C. The electrical conductivities of SBCO samples increase when relatively low currents are applied. This trend can be observed at all pure SBCO and samples mixed with carbon black. However, these properties are not found in composite cathodes comprised of SBCO and CGO91.

Item Type:
Journal Article
Journal or Publication Title:
International Journal of Hydrogen Energy
Additional Information:
This is the author’s version of a work that was accepted for publication in International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Hydrogen Energy, 47, 35, 2022 DOI: 10.1016/j.ijhydene.2022.03.056
Uncontrolled Keywords:
?? intermediate temperature-operating solid oxide fuel cell (it-sofc)cathodeelectrical conductivitylayered perovskitemicrostructureenergy engineering and power technologycondensed matter physicsfuel technologyrenewable energy, sustainability and the environm ??
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17 Jun 2022 11:05
Last Modified:
14 Jun 2024 01:28