A Coupled Experimental/Numerical Approach for Tuning High-performing SOFC-Cathode

被引：7

作者：

Celikbilek, Oezden ^{[1
,2
]}

Jauffres, David ^{[2
]}

Dessemond, Laurent ^{[1
]}

Burriel, Monica ^{[3
]}

Martin, Christophe L. ^{[2
]}

Djurado, Elisabeth ^{[1
]}

机构：

[1] Univ Grenoble Alpes, CNRS, LEPMI, F-38000 Grenoble, France

[2] Univ Grenoble Alpes, CNRS, SIMAP, F-38000 Grenoble, France

[3] Univ Grenoble Alpes, CNRS, LMGP, F-38000 Grenoble, France

来源：

IONIC AND MIXED CONDUCTING CERAMICS 10 | 2016年 / 72卷 / 07期

关键词：

ELECTROSTATIC SPRAY DEPOSITION; OXIDE FUEL-CELLS; COMPOSITE CATHODES; ELECTROCHEMICAL PERFORMANCE; 3D RECONSTRUCTION; OXYGEN REDUCTION; MICROSTRUCTURE; DIFFUSION; FILM; ELECTROLYTE;

D O I：

10.1149/07207.0081ecst

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this paper, a coupled experimental and numerical approach is used to assess the influence of electrode micro/nano-structure and composition on electrochemical performance. First, the area specific resistance (ASR(chem)) of 100 vol. La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) and 60:40 vol. % LSCF:CGO (Ce0.9Gd0.1O2-delta) composite cathode operating at intermediate temperature range (550-650 degrees C) was investigated by impedance spectroscopy. Despite positive expectations based on the literature, the composite in this work showed ASR(chem) values almost twice as high as those of the pure LSCF cathode. It is believed that the beneficial effect of the addition of CGO on the bulk transport is lost by a drastic reduction of the specific surface area. Next, a 3D finite element method (FEM) cube model is implemented to study the influence of the CGO addition and to relate microstructural modifications to the ASItchem. The model successfully calculates the performance of randomly-distributed constituent phases.

引用

页码：81 / 92

页数：12

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