Characterisation of composite SOFC cathodes using electrochemical impedance spectroscopy. Analysis of Pt/YSZ and LSM/YSZ electrodes

被引：87

作者：

Barbucci, A

Bozzo, R

Cerisola, G

Costamagna, P

机构：

[1] Univ Genoa, DICheP, I-16129 Genoa, Italy

[2] Univ Genoa, DIMSET, I-16145 Genoa, Italy

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 13-14期

关键词：

impedance spectroscopy; solid oxide fuel cells; composite electrodes;

D O I：

10.1016/S0013-4686(02)00095-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The performance of composite electrodes as a function of the electrode composition is investigated experimentally through electrochemical impedance spectroscopy (EIS). In particular, two different composite cathodes are analysed, i.e. Pt/YSZ and LSM/YSZ. Typical impedance spectra have been obtained and used to evaluate the overall electrode polarisation resistance R-p. The qualitative features are similar for both cathodes in particular, in both cases the electrode performance (expressed in terms of R-p(-1)) shows a dome-shaped curve as a function of the electrode composition. Nevertheless. the quantitative aspects are very different: in particular. the maximum value of R-p(-1) is much higher for the LSM/YSZ electrode than for the Pt/YSZ one (22 vs. 1.5 S cm(-2)). Also, the composition which gives the maximum performance and the experimental values of the percolation thresholds are different. The reasons for the discrepancies are analysed and discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2183 / 2188

页数：6

共 23 条

[1] Anode micro model of solid oxide fuel cell
Chan, SH
Xia, ZT
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (04) : A388 - A394
[2] Effect of composition on the performance of cermet electrodes. Experimental and theoretical approach
Costamagna, P
Panizza, M
Cerisola, G
Barbucci, A
[J]. ELECTROCHIMICA ACTA, 2002, 47 (07) : 1079 - 1089
[3] Micro-modelling of solid oxide fuel cell electrodes
Costamagna, P
Costa, P
Antonucci, V
[J]. ELECTROCHIMICA ACTA, 1998, 43 (3-4) : 375 - 394
[4] Optimisation of composite cathodes for intermediate temperature SOFC applications
Dusastre, V
Kilner, JA
[J]. SOLID STATE IONICS, 1999, 126 (1-2) : 163 - 174
[5] INFLUENCE OF DOPANT CONCENTRATION ON OXYGEN REDUCTION FOR HIGHLY DOPED ZIRCONIAS
FERNANDES, RZD
HAMMOU, A
HAMMOUCHE, A
[J]. SOLID STATE IONICS, 1989, 37 (01) : 31 - 35
[6] EPMA OF INTERFACES APPLIED TO THE SOLID OXIDE FUEL-CELL
GRUBMEIER, H
NAOUMIDIS, A
STOCHNIOL, G
TSOGA, A
[J]. FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1995, 353 (3-4): : 393 - 398
[7] Interfacial studies of solid-state cells based on electrolytes of mixed ionic-electronic conductors
Hu, HX
Liu, ML
[J]. SOLID STATE IONICS, 1998, 109 (3-4) : 259 - 272
[8] Origin of the initial polarization behavior of Sr-doped LaMnO3 for O2 reduction in solid oxide fuel cells
Jiang, SP
Love, JG
[J]. SOLID STATE IONICS, 2001, 138 (3-4) : 183 - 190
[9] Impedance of solid oxide fuel cell LSM/YSZ composite cathodes
Jorgensen, MJ
Mogensen, M
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (05) : A433 - A442
[10] Performance/structure correlation for composite SOFC cathodes
Juhl, M
Primdahl, S
Manon, C
Mogensen, M
[J]. JOURNAL OF POWER SOURCES, 1996, 61 (1-2) : 173 - 181

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