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The influence of reduction conditions on a Ni-YSZ SOFC anode microstructure and evolution

AuthorsMonzón, Hernán; Laguna-Bercero, M. A.
Issue Date2015
PublisherElectrochemical Society
CitationECS Transactions 68(1): 1229-1235 (2015)
AbstractNi-YSZ cermets are the most widespread material used as SOFC anodes. These materials are generally fabricated through the reduction of a NiO-YSZ composite, but the reduction conditions have a great effect in the final microstructure of the electrode. In the present work several conditions were explored to reduce microtubular anode supports produced via extrusion in order to find a suitable microstructure for SOFC anodes. Samples were reduced in pure and diluted H2, either dry or humidified at temperatures ranging from 400 to 800°C while their DC conductivity was being monitored. The highest value of peak conductivity was measured in the sample reduced in humidified pure hydrogen at 800°C, but it experienced more severe conductivity degradation that other samples. The best value for the duration of the test was obtained for the sample reduced in dry diluted hydrogen at 800°C.
Publisher version (URL)https://doi.org/10.1149/06801.1229ecst
Identifiersdoi: 10.1149/06801.1229ecst
issn: 1938-5862
e-issn: 1938-6737
Appears in Collections:(ICMA) Artículos
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