Suspension plasma spray and performance characterization of half cells with NiO/YSZ anode and YSZ electrolyte

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DOIResolve DOI: http://doi.org/10.1007/s11666-011-9696-z
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TypeArticle
Journal titleJournal of Thermal Spray Technology
ISSN1544-1016
Volume21
Issue1
Pages715; # of pages: 8
SubjectNiO/YSZ anode; solid oxide fuel cells (SOFC); suspension plasma spray (SPS); YSZ electrolyte
AbstractThe use of a liquid feedstock carrier in suspension plasma spray (SPS) permits injection of fine powders, providing the possibility of producing sprayed coatings that are both thin and dense and have fine microstructures. These characteristics make SPS an attractive process for depositing highly efficient electrodes and electrolytes for solid oxide fuel cell (SOFC) applications. In this study, NiO-yttria stabilized zirconia (YSZ) anode and YSZ electrolyte half cells were successfully deposited on porous Hastelloy X substrates by SPS. The NiO-YSZ anode deposition process was optimized by design of experiment. The YSZ electrolyte spray process was examined by changing one parameter at a time. The results from the design-of-experiment trials indicated that the porosity of the as-deposited coatings increased with an increase of suspension feed rate while it decreased with an increase of total plasma gas flow rate and standoff distance. The deposition rate increased with an increase of total plasma gas flow rate, suspension feed rate, and standoff distance. The microstructure examination by SEM showed that the NiO and YSZ phases were homogeneously distributed and that the YSZ phase had a lamellar structure. It was observed that the density of the YSZ electrolyte layer increased as input power of the plasma torch increased. Electrochemical characterization of the fabricated cells indicated that an open cell voltage of 0.989 V at 500 C and a peak power of 0.610 W/cm2 at 750 C were reached.
Publication date
PublisherSpringer
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number54371
NPARC number19098662
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Record identifier5f9ebab1-b40c-4cd5-bd62-89bd9d72e004
Record created2011-12-21
Record modified2016-05-09
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