Gadolinia doped ceria/yttria stabilised zirconia electrolytes for solid oxide fuel cell applications

J Luo, Richard J Ball, R Stevens

Research output: Contribution to journalArticle

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Abstract

Solid oxide fuel cells are currently constructed using a yttria stabilised zirconia electrolyte membrane. However, zirconia has a number of disadvantages associated with its use, such as the high operational temperatures required for it to exhibit acceptable levels of ionic conductivity. Alternative ceramics such as doped cerium oxide show promise as electrolytes capable of operating at reduced temperatures, but introduce additional problems such as electronic conduction and inferior mechanical properties. This paper describes the manufacture and characterisation of a number of prototype electrolytes consisting of a mixture of yttria stabilised zirconia and gadolinium doped ceria. Traditional ceramic processing techniques were used to produce the samples, which were then examined using dilatometry, impedance spectroscopy and X-ray diffraction. Results show a lowering of the ionic conductivity of zirconia with the addition of doped ceria. X-ray diffraction patterns obtained from the samples suggested that this effect could be attributed to the formation of a solid solution of ceria in zirconia.
LanguageEnglish
Pages235-240
Number of pages6
JournalJournal of Materials Science
Volume39
Issue number1
DOIs
StatusPublished - 2004

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Gadolinium
Yttria stabilized zirconia
Cerium compounds
Solid oxide fuel cells (SOFC)
Zirconia
Electrolytes
Ionic conductivity
X ray diffraction
Cerium
Diffraction patterns
Solid solutions
Spectroscopy
Membranes
Mechanical properties
Temperature
Oxides
Processing
zirconium oxide
gadolinium oxide

Cite this

Gadolinia doped ceria/yttria stabilised zirconia electrolytes for solid oxide fuel cell applications. / Luo, J; Ball, Richard J; Stevens, R.

In: Journal of Materials Science, Vol. 39, No. 1, 2004, p. 235-240.

Research output: Contribution to journalArticle

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