Conductive spinels derived from Co–Mn based alloy precursor for SOFC cathode-side contact application
Abstract
The utilization of gas-atomized Co–Mn based alloy precursor is a promising approach to lowering the sintering temperature of the spinel contact layer and enhancing its performance. In this work, simulated interconnect/contact/cathode cells are employed to investigate the effects of different metallic precursors (i.e., three Co–Mn based alloy powders and a mixture of Co + MnO2 powders) on the microstructure and performance of the reactively-sintered MnCo2O4-based contact layer. While excellent overall electrical performance is observed for all the cells with the four contact precursors during 1000-h testing at 800 °C in air, the cell with the Ce-doped alloy contact precursor shows the lowest cell area specific resistance (ASR) and ASR degradation rate. Cross-sectional observation of the tested cells is conducted to assess the compatibility of the contact layer with adjacent components as well as its effectiveness in reducing the Cr2O3 scale growth and blocking Cr migration from the interconnect to the cathode.
- Authors:
-
- Tennessee Technological Univ., Cookeville, TN (United States). Dept. of Mechanical Engineering
- Publication Date:
- Research Org.:
- Tennessee Technological Univ., Cookeville, TN (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE); National Science Foundation (NSF)
- OSTI Identifier:
- 1849168
- Alternate Identifier(s):
- OSTI ID: 1670509; OSTI ID: 1989873
- Grant/Contract Number:
- FE0026210; FE0031187; CMMI-1362680
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Hydrogen Energy
- Additional Journal Information:
- Journal Volume: 45; Journal Issue: 51; Journal ID: ISSN 0360-3199
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 08 HYDROGEN; Chemistry; Electrochemistry; Energy & fuels; Solid oxide fuel cell; Interconnect; Cathode-side contact; Spinel; Alloy powder; Thermal conversion
Citation Formats
Yu, Y. T., Zhu, J. H., and Bates, B. L. Conductive spinels derived from Co–Mn based alloy precursor for SOFC cathode-side contact application. United States: N. p., 2020.
Web. doi:10.1016/j.ijhydene.2020.07.153.
Yu, Y. T., Zhu, J. H., & Bates, B. L. Conductive spinels derived from Co–Mn based alloy precursor for SOFC cathode-side contact application. United States. https://doi.org/10.1016/j.ijhydene.2020.07.153
Yu, Y. T., Zhu, J. H., and Bates, B. L. Thu .
"Conductive spinels derived from Co–Mn based alloy precursor for SOFC cathode-side contact application". United States. https://doi.org/10.1016/j.ijhydene.2020.07.153. https://www.osti.gov/servlets/purl/1849168.
@article{osti_1849168,
title = {Conductive spinels derived from Co–Mn based alloy precursor for SOFC cathode-side contact application},
author = {Yu, Y. T. and Zhu, J. H. and Bates, B. L.},
abstractNote = {The utilization of gas-atomized Co–Mn based alloy precursor is a promising approach to lowering the sintering temperature of the spinel contact layer and enhancing its performance. In this work, simulated interconnect/contact/cathode cells are employed to investigate the effects of different metallic precursors (i.e., three Co–Mn based alloy powders and a mixture of Co + MnO2 powders) on the microstructure and performance of the reactively-sintered MnCo2O4-based contact layer. While excellent overall electrical performance is observed for all the cells with the four contact precursors during 1000-h testing at 800 °C in air, the cell with the Ce-doped alloy contact precursor shows the lowest cell area specific resistance (ASR) and ASR degradation rate. Cross-sectional observation of the tested cells is conducted to assess the compatibility of the contact layer with adjacent components as well as its effectiveness in reducing the Cr2O3 scale growth and blocking Cr migration from the interconnect to the cathode.},
doi = {10.1016/j.ijhydene.2020.07.153},
journal = {International Journal of Hydrogen Energy},
number = 51,
volume = 45,
place = {United States},
year = {Thu Aug 06 00:00:00 EDT 2020},
month = {Thu Aug 06 00:00:00 EDT 2020}
}
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