La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-delta (LSGMC) powders were prepared by polymeric precursor synthesis, using either polyvinyl alcohol (PVA) or citric acid (CA) as complexing agents. The powders were synthesized using different ratios between the complexing agent and the cations dissolved in solution. The obtained polymer gel precursors were dried and calcined at temperatures between 1000 degrees and 1450 degrees C. Single-phase LSGMC powders were obtained at a firing temperature of 1450 degrees C, using PVA and a molar ratio between the hydroxylic groups and the total cations of 3:1. Phase-pure LSGMC powders were used to sinter (1490 degrees C, 2 h) thick pellets. The functional properties of LSGMC pellets were assessed by electrochemical impedance spectroscopy. The electrical conductivity values and the apparent activation energies in different transport regimes were in agreement with literature data. The same LSGMC powders were deposited by electrophoretic deposition (EPD) on a green membrane containing lanthanum-doped ceria (La0.4Ce0.6O2-x, LDC), a binder, and carbon powders. The LSGMC/LDC bi-layer obtained by EPD was cofired at 1490 degrees C for 2 h. A dense and crack-free 8-mu m-thick LSGMC film supported on a porous skeleton of LDC was obtained. The combined use of proper powder synthesis and film processing routes has thus proven to be a viable way for manufacturing anode-supported LSGMC films.

Bozza, F., Polini, R., Traversa, E. (2009). Electrophoretic Deposition of Dense La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-delta Electrolyte Films from Single-Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 92(9), 1999-2004 [10.1111/j.1551-2916.2009.03154.x].

Electrophoretic Deposition of Dense La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-delta Electrolyte Films from Single-Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells

POLINI, RICCARDO;TRAVERSA, ENRICO
2009-01-01

Abstract

La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-delta (LSGMC) powders were prepared by polymeric precursor synthesis, using either polyvinyl alcohol (PVA) or citric acid (CA) as complexing agents. The powders were synthesized using different ratios between the complexing agent and the cations dissolved in solution. The obtained polymer gel precursors were dried and calcined at temperatures between 1000 degrees and 1450 degrees C. Single-phase LSGMC powders were obtained at a firing temperature of 1450 degrees C, using PVA and a molar ratio between the hydroxylic groups and the total cations of 3:1. Phase-pure LSGMC powders were used to sinter (1490 degrees C, 2 h) thick pellets. The functional properties of LSGMC pellets were assessed by electrochemical impedance spectroscopy. The electrical conductivity values and the apparent activation energies in different transport regimes were in agreement with literature data. The same LSGMC powders were deposited by electrophoretic deposition (EPD) on a green membrane containing lanthanum-doped ceria (La0.4Ce0.6O2-x, LDC), a binder, and carbon powders. The LSGMC/LDC bi-layer obtained by EPD was cofired at 1490 degrees C for 2 h. A dense and crack-free 8-mu m-thick LSGMC film supported on a porous skeleton of LDC was obtained. The combined use of proper powder synthesis and film processing routes has thus proven to be a viable way for manufacturing anode-supported LSGMC films.
2009
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/03 - CHIMICA GENERALE E INORGANICA
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
English
Con Impact Factor ISI
Solide Oxide Fuel Cells; Co-doped lanthanum gallate; LSGMC; electrophoretic deposition; sol-gel synthesis
This work was supported by the Ministry of University and Research (MIUR) of Italy (FISR Project ‘‘Polymer and Ceramic Electrolyte for Fuel Cells: System Validation and Development of New Materials’’).
Bozza, F., Polini, R., Traversa, E. (2009). Electrophoretic Deposition of Dense La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-delta Electrolyte Films from Single-Phase Powders for Intermediate Temperature Solid Oxide Fuel Cells. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 92(9), 1999-2004 [10.1111/j.1551-2916.2009.03154.x].
Bozza, F; Polini, R; Traversa, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/26167
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