YSZ phase purity and stability in chemically prepared SOFC anodes

Catherine M. Grgicak, Javier B. Giorgi

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

Phase pure, dual phase NiO-YSZ and CuO-YSZ have been synthesized by the co-precipitation method. Sample systems involving the synthesis of these materials at various pH levels, and at varying Ni, Cu and yttria content have been described. The nickel system shows a relatively simple precipitation pathway in which Ni2+ precipitates out of solution as Ni(OH) 2. In contrast, Cu2+ precipitates as Cu 2(OH)3Cl, followed by a conversion to CuO with increasing pH. Phase separation of monoclinic zirconia can be avoided by an appropriate choice of metal to base concentration ratios during precipitation or by the addition of additional yttria. The effect of the different preparations on conductivity suggests a small effect on short term performance. Large increases in conductivity and lower temperatures required during methane adsorption for Cu-YSZ make copper an attractive alternative to nickel for SOFC applications once optimal precipitation conditions have been established.

Original languageEnglish (US)
Pages1200-1209
Number of pages10
StatePublished - 2005
Externally publishedYes
Event9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada
Duration: May 15 2005May 20 2005

Other

Other9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
Country/TerritoryCanada
CityQuebec
Period5/15/055/20/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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