Creating dense, constrained Ce0.9Gd0.1O 1.95 films at low temperature for SOFC applications

Jason D. Nicholas, Lutgard C De Jonghe

Research output: ResearchConference contribution

  • 6 Citations

Abstract

We have investigated the effect of various dopants on the sintering characteristics of Ce0.9Gd0.1O1.95 (CGO) and found that 99% dense electrolyte pellets can be produced at the record low temperature of 800°C (as opposed to the 1400°C typically needed) by sintering Ce0.9Gd0.1O1.95 with as little 3mol% lithium. Our studies indicate that doping the CGO surface with lithium nitrate, as opposed to using alternative lithium salts, produces the largest decrease in sintering temperature. Unlike other dopants that lower the sintering temperature by altering the near grain boundary vacancy concentration, lithium lowers the sintering temperature through the formation of an intergranular liquid phase. This liquid phase allows fully dense, completely constrained CGO films to be produced on inert substrates at temperatures as low as 950°C.

LanguageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
Pages51-56
Number of pages6
Volume1023
StatePublished - 2007
Externally publishedYes
EventFunctional Nanoscale Ceramics for Energy Systems - 2007 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 9 2007Apr 13 2009

Other

OtherFunctional Nanoscale Ceramics for Energy Systems - 2007 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/9/074/13/09

Profile

Solid oxide fuel cells (SOFC)
Sintering
Temperature
sintering
Lithium
lithium
temperature
Doping (additives)
Liquids
liquid phases
Nitrates
Electrolytes
Vacancies
Grain boundaries
Salts
Substrates
pellets
nitrates
grain boundaries
electrolytes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Nicholas, J. D., & Jonghe, L. C. D. (2007). Creating dense, constrained Ce0.9Gd0.1O 1.95 films at low temperature for SOFC applications. In Materials Research Society Symposium Proceedings (Vol. 1023, pp. 51-56)

Creating dense, constrained Ce0.9Gd0.1O 1.95 films at low temperature for SOFC applications. / Nicholas, Jason D.; Jonghe, Lutgard C De.

Materials Research Society Symposium Proceedings. Vol. 1023 2007. p. 51-56.

Research output: ResearchConference contribution

Nicholas, JD & Jonghe, LCD 2007, Creating dense, constrained Ce0.9Gd0.1O 1.95 films at low temperature for SOFC applications. in Materials Research Society Symposium Proceedings. vol. 1023, pp. 51-56, Functional Nanoscale Ceramics for Energy Systems - 2007 MRS Spring Meeting, San Francisco, CA, United States, 4/9/07.
Nicholas JD, Jonghe LCD. Creating dense, constrained Ce0.9Gd0.1O 1.95 films at low temperature for SOFC applications. In Materials Research Society Symposium Proceedings. Vol. 1023. 2007. p. 51-56.
Nicholas, Jason D. ; Jonghe, Lutgard C De. / Creating dense, constrained Ce0.9Gd0.1O 1.95 films at low temperature for SOFC applications. Materials Research Society Symposium Proceedings. Vol. 1023 2007. pp. 51-56
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