期刊
SOLID STATE IONICS
卷 261, 期 -, 页码 36-44出版社
ELSEVIER
DOI: 10.1016/j.ssi.2014.04.014
关键词
SOFC; Anode; Cermet; Proton conductor; Impedance; Barium impregnation
资金
- Vicerrectoria de Investigacion y Extension of the Universidad Industrial de Santander [5450, 5451]
- Brazilian program [490129/2010-2-Edital MCT/CNPq, 08/2010]
- COLCIENCIAS
- CAPES
- FAPEMIG
- CNPQ
- CEMIG
- PRPq-UFMG
The effect of Ba-impregnation within a bi-layered NiO-YSZ/NiO-GDC anode for solid oxide fuel cells (SOFC) has been investigated. The in situ formation of BZY/BCG proton conducting phases is proved by X-ray diffraction (XRD) and analyzed in detail by the Rietveld method. The integration of barium within the cermet microstructure is also evidenced by Electron Microscopy, where the presence of BZY/BCG phases creates possible additional paths for proton conduction. Electrochemical impedance spectroscopy (EIS) analysis indicates that the proton conducting phases generate a global decrease in the total polarization resistance, and in particular in its charge transfer component. (C) 2014 Elsevier B.V. All rights reserved.
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