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

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

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

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

ENV - Environmental Studies for Advanced Society

Research output: Contribution to conference › Paper › peer-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 _0.9Gd_0.1O_1.95 (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 language	English
Pages	1695-1702
Number of pages	8
Publication status	Published - 2005 Dec 1
Event	9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada Duration: 2005 May 15 → 2005 May 20

Other

Other	9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
Country	Canada
City	Quebec
Period	05/5/15 → 05/5/20

ASJC Scopus subject areas

Engineering(all)

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

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.",

author = "T. Kawada and D. Ueno and M. Sase and K. Yashiro and T. Otake and A. Kaimai and J. Mizusaki",

year = "2005",

month = dec,

day = "1",

language = "English",

pages = "1695--1702",

note = "9th International Symposium on Solid Oxide Fuel Cells, SOFC IX ; Conference date: 15-05-2005 Through 20-05-2005",

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TY - CONF

T1 - Resistance of (La, Sr)CoO3/ YSZ interface with a ceriainterlayer

AU - Kawada, T.

AU - Ueno, D.

AU - Sase, M.

AU - Yashiro, K.

AU - Otake, T.

AU - Kaimai, A.

AU - Mizusaki, J.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - 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.

AB - 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.

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SP - 1695

EP - 1702

T2 - 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX

Y2 - 15 May 2005 through 20 May 2005

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