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Mixed Conducting and Cathodic Properties of Zirconia-Nio Mixture

Published online by Cambridge University Press:  15 February 2011

Y. M. Park  and
G. M. Choi
Y. M. Park
Affiliation:
Pohang University of Science and Technology, Dept. of Materials Science and Engineering, Pohang., 790-784, Korea
G. M. Choi
Affiliation:
Pohang University of Science and Technology, Dept. of Materials Science and Engineering, Pohang., 790-784, Korea
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Abstract

Absract

Stabilized zirconia-NiO mixture was chosen as a representative of ionic-electronic composite and the effect of mixture composition on the mixed conducting properties were studied. The measurements of oxygen partial-pressure dependence of conductivity and Hebb-Wagner polarization enabled to determine the electronic contribution to the total conduction in a wide composition range. In ion conduction region, electronic conductivity increased continuously with NiO content. The overpotentials of screen-printed YSZ-NiO electrode on YSZ electrolyte were measured and found to decrease with increasing NiO content and thus with the estimated electronic conductivity of porous electrode.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 617
Copyright
Copyright © Materials Research Society 1999

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