Effect of infiltration on performance of Ni-YSZ fuel electrodes

Scott A. Barnett, Beom Kyeong Park, Roberto Scipioni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations


Ni-YSZ electrodes for solid oxide cells (SOCs) can have a diverse range of compositions, porosities, and particle sizes - factors that impact electrochemical performance. A typical Ni-YSZ structure in an anode-supported cell fired at 1400oC has feature sizes of ~ 0.5 µm that yield desirably low polarization resistance values < 0.1 Ω cm2 at 800oC in H2-H2O fuel, along with good stability. Decreasing feature size increases three-phase boundary density, thereby reducing polarization resistance and improving low-temperature cell performance. However, the feature size that can be reached in anode-supported cells is limited by the relatively high co-firing temperature. Furthermore, decreased feature sizes can exacerbate coarsening effects that degrade performance. This paper discusses an alternative method for enhancing the low-temperature performance of Ni-YSZ anodes - infiltration of Gd-doped Ceria (GDC). Since GDC is introduced after the high-temperature firing, nano-scale particles can be achieved. A single-step GDC infiltration into Ni-YSZ is studied with different solution concentrations. The optimal infiltration is found to reduce polarization resistance by a factor of 3 times at 600oC.

Original languageEnglish (US)
Title of host publicationSolid Oxide Fuel Cells 16, SOFC 2019
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Number of pages7
ISBN (Electronic)9781607688747, 9781607688747
StatePublished - 2019
Event16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 - Kyoto, Japan
Duration: Sep 8 2019Sep 13 2019

Publication series

NameECS Transactions
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862


Conference16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019

ASJC Scopus subject areas

  • Engineering(all)


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