1. BARIUM CERATE SUBSTITUTED WITH YTTRIA AS PROTON CONDUCTING ELECTROLYTE.
- Author
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Navickas, Edvinas, Braun, Artur, Knoknerytė, Julija, Chen, Qianli, Abakevičienė, Brigita, Kubel, Frank, Tamulevičius, Sigitas, and Fleig, Jürgen
- Subjects
CONSTITUTION of matter ,FUEL cells ,ELECTROCHEMICAL analysis ,IMPEDANCE spectroscopy ,ELECTRIC batteries ,DISLOCATIONS in crystals - Abstract
Barium cerate substituted with yttria (BCY) demonstrates high proton conductivity with low activation energy, and thus is a potential candidate as electrolyte in intermediate temperature solid oxide fuel cells (SOFC). In this contribution the proton conductivity of BCY doped with different concentrations of yttria (5, 10 and 20 mol%) was investigated. Proton conductivity of isostatically pressed pellets was measured by electrochemical impedance spectroscopy in dry and wet nitrogen atmospheres. It was found that the substitution level has significant influence on the bulk conductivity, whereas atmosphere has little influence. In contrast, the effect of the atmosphere for conductivity of grain boundaries is significant. [ABSTRACT FROM AUTHOR]
- Published
- 2012