A soft chemistry method was used to synthesize BaCe0.8 - xZrxY0.2O3 - δ (BCZY, with 0.0 ≤ x ≤ 0.8) proton conductors to combine the high proton conductivity of barium cerate and good chemical stability of barium zirconate. To verify the chemical stability, all the synthesized oxides were exposed to 100% CO2 at 900 °C for 3 h and the phase composition of the resulting specimens was investigated by X-ray diffraction (XRD) analysis. The chemical stability against CO2 increased with increasing the Zr content, with good results for samples with x ≥ 0.5. The electrical conductivity of the samples was investigated as a function of the Zr content using Electrochemical Impedance Spectroscopy (EIS) measurements. Hydrogen-air fuel cell experiments were carried out at 700 °C using the BCZY proton conducting electrolytes and platinum electrodes. Promising performance was observed for BaCe0.3Zr0.5Y0.2O3 - δ because it maintains the good chemical stability of barium zirconate but with improved electrical conductivity and fuel cell performance. © 2008 Elsevier B.V. All rights reserved.

Fabbri, E., D'Epifanio, A., Di Bartolomeo, E., Licoccia, S., & Traversa, E. (2008). Tailoring the chemical stability of Ba(Ce0.8 - xZrx)Y0.2O3 - δ protonic conductors for Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFCs). SOLID STATE IONICS, 179(15-16), 558-564 [10.1016/j.ssi.2008.04.002].

Tailoring the chemical stability of Ba(Ce0.8 - xZrx)Y0.2O3 - δ protonic conductors for Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFCs)

D'EPIFANIO, ALESSANDRA;DI BARTOLOMEO, ELISABETTA;LICOCCIA, SILVIA;TRAVERSA, ENRICO
2008

Abstract

A soft chemistry method was used to synthesize BaCe0.8 - xZrxY0.2O3 - δ (BCZY, with 0.0 ≤ x ≤ 0.8) proton conductors to combine the high proton conductivity of barium cerate and good chemical stability of barium zirconate. To verify the chemical stability, all the synthesized oxides were exposed to 100% CO2 at 900 °C for 3 h and the phase composition of the resulting specimens was investigated by X-ray diffraction (XRD) analysis. The chemical stability against CO2 increased with increasing the Zr content, with good results for samples with x ≥ 0.5. The electrical conductivity of the samples was investigated as a function of the Zr content using Electrochemical Impedance Spectroscopy (EIS) measurements. Hydrogen-air fuel cell experiments were carried out at 700 °C using the BCZY proton conducting electrolytes and platinum electrodes. Promising performance was observed for BaCe0.3Zr0.5Y0.2O3 - δ because it maintains the good chemical stability of barium zirconate but with improved electrical conductivity and fuel cell performance. © 2008 Elsevier B.V. All rights reserved.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/07 - Fondamenti Chimici delle Tecnologie
Settore ING-IND/22 - Scienza e Tecnologia dei Materiali
English
Con Impact Factor ISI
Intermediate Temperature Solid Oxide Fuel Cell; Proton conductor; Zr-substituted BaCeO3; Chemical stability
Fabbri, E., D'Epifanio, A., Di Bartolomeo, E., Licoccia, S., & Traversa, E. (2008). Tailoring the chemical stability of Ba(Ce0.8 - xZrx)Y0.2O3 - δ protonic conductors for Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFCs). SOLID STATE IONICS, 179(15-16), 558-564 [10.1016/j.ssi.2008.04.002].
Fabbri, E; D'Epifanio, A; DI BARTOLOMEO, E; Licoccia, S; Traversa, E
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/15244
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