| Texto completo | |
| Autor(es): |
Muccillo, R.
;
Oliveira, O. R.
;
dos Santos, E.
;
de Florio, D. Z.
;
Fonseca, F. C.
;
Muccillo, E. N. S.
;
Eguchi, K
;
Singhai, SC
;
Yokokawa, H
;
Mizusaki, H
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2; v. 7, n. 1, p. 2-pg., 2007-01-01. |
| Resumo | |
Unitary planar solid oxide fuel cells with gadolinium-doped barium cerate protonic conductor solid electrolyte, slurry-coated thin film La0.6Ca0.4Fe0.8Co0.2O2.74 anode, and thin film Pt cathode have been put into operation in the temperature range 500-900 degrees C using different fuel-oxidant combinations: H-2-air, (30% H-2, 70% N-2)-air, (10% CH4, 90% Ar)-air, and C2H5OH-air. The sintered ceramic protonic conductors with dimensions phi=25mm and I mm thickness were characterized by determination of density by He picnometry, structural phase by X-ray diffraction and electrical behavior from 500 to 1000 degrees C by electrochemical impedance spectroscopy in the 5 Hz - 13 MHz frequency range. An experimental setup was been built for testing electrolyte-supported cells fueled by H-2, H-2-Ar, CH4-Ar, C2H5O-N-2- Several ceramic sealants were tested for allowing thermal cycling of the cells without cracking. The OCV time dependence, the current-voltage plot, and the Z ''(omega) x Z'(omega) impedance diagrams, in the 300-900 degrees C range, show the possibilities of operation of the cell. (AU) | |
| Processo FAPESP: | 05/53241-9 - Estudo de fenômenos intergranulares em materiais cerâmicos |
| Beneficiário: | Reginaldo Muccillo |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |