Conference paper · Journal article
Performance-Microstructure Relations in Ni/CGO Infiltrated Nb-doped SrTiO3 SOFC Anodes
Department of Energy Conversion and Storage, Technical University of Denmark1
Fundamental Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark2
Ceramic Engineering & Science, Department of Energy Conversion and Storage, Technical University of Denmark3
Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark4
Nb-doped SrTiO3 solid oxide fuel cell (SOFC) anodes, infiltrated with CGO/Ni, were investigated by electrochemical impedance spectroscopy (EIS) and high resolution microscopy techniques, upon varying production and testing parameters. The electrochemical analysis involved a combination of distribution of relaxation times (DRT) and complex non-linear least squares (CNLS) fitting routine.
These electrodes were studied as singlephase or as composites with 8YSZ. Sr0.94Ti0.9Nb0.1O3-δ/ 10 vol.% 8YSZ composite infiltrated electrodes were the best overall performers, with enhanced performance stability under higher steam contents. Combined DRT/CNLS showed the existence of at least three contributing processes to the total polarisation resistance (Rp) of these electrodes.
Microstructural changes involving infiltrate growth and redistribution were also confirmed.
Language: | English |
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Year: | 2012 |
Pages: | 389-402 |
Proceedings: | 221st ECS Meeting |
ISSN: | 19385862 and 19386737 |
Types: | Conference paper and Journal article |
DOI: | 10.1149/1.3701330 |
ORCIDs: | Ramos, Tania , Reddy Sudireddy, Bhaskar , Bentzen, Janet Jonna , Jørgensen, Peter Stanley and Kuhn, Luise Theil |