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DOE OSTI · 1849168

Conductive spinels derived from Co–Mn based alloy precursor for SOFC cathode-side contact application

Yu, Y. T.·Zhu, J. H.·Bates, B. L.
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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 + MnO 2 powders) on the microstructure and performance of the reactively-sintered MnCo 2 O 4 -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 Cr 2 O 3 scale growth and blocking Cr migration from the interconnect to the cathode.

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08 HYDROGENAlloy powderCathode-side contactChemistryElectrochemistryEnergy & fuelsInterconnectSolid oxide fuel cellSpinelThermal conversion

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Yu, Y. T., Zhu, J. H., Bates, B. L.. 2020-08-06. Conductive spinels derived from Co–Mn based alloy precursor for SOFC cathode-side contact application. https://doi.org/10.1016/j.ijhydene.2020.07.153

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