Resistance of (La, Sr)CoO3/ YSZ interface with a ceriainterlayer

T. Kawada, D. Ueno, M. Sase, K. Yashiro, T. Otake, A. Kaimai, J. Mizusaki

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

Electrochemical impedance of dense (La,Sr)CoO3 (LSCO) electrode on single crystalline YSZ electrolyte was investigated in order to clarify the effect of ceria interlayer. Pulsed laser deposition technique was used to fabricate a dense LSCO electrode (∼1.5 μm) and a thin (-100 nm) Ce 0.9Gd0.1O1.95 (CGO) interlayer on a (1 0 0) surface of YSZ. Unlike the direct contact of LSCO on YSZ, LSCO/CGO/YSZ interface showed no significant degradation during the operation. The main part of the resistance was attributed to oxygen exchange reaction at the electrode surface as the case of LSCO electrode on CGO electrolyte. However, a possible minor contribution of the interface resistance was revealed by equivalent circuit analysis. The interface impedance was a single depressed semicircle, in most cases, in a complex impedance plane. It did not depend strongly on oxygen potential and temperature. It ranged from 0.3 to 1 Ωcm-2, which may be significant in a practical porous electrode with smaller contact area.

Original languageEnglish
Pages1695-1702
Number of pages8
Publication statusPublished - 2005 Dec 1
Event9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada
Duration: 2005 May 152005 May 20

Other

Other9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
CountryCanada
CityQuebec
Period05/5/1505/5/20

ASJC Scopus subject areas

  • Engineering(all)

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