Preparation and Electrochemical Characterization of Perovskite/YSZ Ceramic Films

Daniel Z. de Florio, Reginaldo Muccillo, Vincenzo Esposito, Elisabetta Di Bartolomeo, Enrico Traversa

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Perovskite-type La0.8Sr0.2Co0.8Fe0.2O32d powders were prepared using a complex polymeric precursor method. Thermal analysis was carried out on the perovskite precursor to investigate the oxide-phase formation. The structural phase of the powders was determined by X-ray diffraction. These results showed that the decomposition of the precursors occurs in a two-step reaction and temperatures higher that 1000°C are required for these decomposition reactions. For the electrochemical characterization, La0.8Sr0.2Co0.8Fe0.2O32d electrodes were deposited by a wet spray technique on dense yttria-stabilized zirconia ~YSZ! layers. The morphology of the deposited perovskite thick films (;50 mm) was investigated by field emission scanning electron microscopy and showed a porous microstructure. Electrochemical impedance spectroscopy ~EIS! measurements were carried out under synthetic air flux at temperatures ranging from 200-600°C in the 10 mHz-10 MHz frequency range showing an interfacial electrical resistance related to the La0.8Sr0.2Co0.8Fe0.2O32d electrodes. EIS measurements were also performed in the same frequency range at different oxygen partial pressures (1025-1 atm) at 600°C. At this temperature and frequencies below 0.1 MHz, the electrical response to the applied signal of the electrode material is best fitted by two semicircles, which can be related to charge-transfer processes. The activation energy for the limiting step ~adsorption/desorption! was found to be 1.6 eV. © 2004 The Electrochemical Society
Original languageEnglish
JournalJournal of The Electrochemical Society
Volume152
Issue number1
Pages (from-to)A88-A92
ISSN0013-4651
DOIs
Publication statusPublished - 2005
Externally publishedYes

Cite this

de Florio, Daniel Z. ; Muccillo, Reginaldo ; Esposito, Vincenzo ; Bartolomeo, Elisabetta Di ; Traversa, Enrico. / Preparation and Electrochemical Characterization of Perovskite/YSZ Ceramic Films. In: Journal of The Electrochemical Society. 2005 ; Vol. 152, No. 1. pp. A88-A92.
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abstract = "Perovskite-type La0.8Sr0.2Co0.8Fe0.2O32d powders were prepared using a complex polymeric precursor method. Thermal analysis was carried out on the perovskite precursor to investigate the oxide-phase formation. The structural phase of the powders was determined by X-ray diffraction. These results showed that the decomposition of the precursors occurs in a two-step reaction and temperatures higher that 1000°C are required for these decomposition reactions. For the electrochemical characterization, La0.8Sr0.2Co0.8Fe0.2O32d electrodes were deposited by a wet spray technique on dense yttria-stabilized zirconia ~YSZ! layers. The morphology of the deposited perovskite thick films (;50 mm) was investigated by field emission scanning electron microscopy and showed a porous microstructure. Electrochemical impedance spectroscopy ~EIS! measurements were carried out under synthetic air flux at temperatures ranging from 200-600°C in the 10 mHz-10 MHz frequency range showing an interfacial electrical resistance related to the La0.8Sr0.2Co0.8Fe0.2O32d electrodes. EIS measurements were also performed in the same frequency range at different oxygen partial pressures (1025-1 atm) at 600°C. At this temperature and frequencies below 0.1 MHz, the electrical response to the applied signal of the electrode material is best fitted by two semicircles, which can be related to charge-transfer processes. The activation energy for the limiting step ~adsorption/desorption! was found to be 1.6 eV. {\circledC} 2004 The Electrochemical Society",
author = "{de Florio}, {Daniel Z.} and Reginaldo Muccillo and Vincenzo Esposito and Bartolomeo, {Elisabetta Di} and Enrico Traversa",
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Preparation and Electrochemical Characterization of Perovskite/YSZ Ceramic Films. / de Florio, Daniel Z.; Muccillo, Reginaldo; Esposito, Vincenzo; Bartolomeo, Elisabetta Di; Traversa, Enrico.

In: Journal of The Electrochemical Society, Vol. 152, No. 1, 2005, p. A88-A92.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Preparation and Electrochemical Characterization of Perovskite/YSZ Ceramic Films

AU - de Florio, Daniel Z.

AU - Muccillo, Reginaldo

AU - Esposito, Vincenzo

AU - Bartolomeo, Elisabetta Di

AU - Traversa, Enrico

PY - 2005

Y1 - 2005

N2 - Perovskite-type La0.8Sr0.2Co0.8Fe0.2O32d powders were prepared using a complex polymeric precursor method. Thermal analysis was carried out on the perovskite precursor to investigate the oxide-phase formation. The structural phase of the powders was determined by X-ray diffraction. These results showed that the decomposition of the precursors occurs in a two-step reaction and temperatures higher that 1000°C are required for these decomposition reactions. For the electrochemical characterization, La0.8Sr0.2Co0.8Fe0.2O32d electrodes were deposited by a wet spray technique on dense yttria-stabilized zirconia ~YSZ! layers. The morphology of the deposited perovskite thick films (;50 mm) was investigated by field emission scanning electron microscopy and showed a porous microstructure. Electrochemical impedance spectroscopy ~EIS! measurements were carried out under synthetic air flux at temperatures ranging from 200-600°C in the 10 mHz-10 MHz frequency range showing an interfacial electrical resistance related to the La0.8Sr0.2Co0.8Fe0.2O32d electrodes. EIS measurements were also performed in the same frequency range at different oxygen partial pressures (1025-1 atm) at 600°C. At this temperature and frequencies below 0.1 MHz, the electrical response to the applied signal of the electrode material is best fitted by two semicircles, which can be related to charge-transfer processes. The activation energy for the limiting step ~adsorption/desorption! was found to be 1.6 eV. © 2004 The Electrochemical Society

AB - Perovskite-type La0.8Sr0.2Co0.8Fe0.2O32d powders were prepared using a complex polymeric precursor method. Thermal analysis was carried out on the perovskite precursor to investigate the oxide-phase formation. The structural phase of the powders was determined by X-ray diffraction. These results showed that the decomposition of the precursors occurs in a two-step reaction and temperatures higher that 1000°C are required for these decomposition reactions. For the electrochemical characterization, La0.8Sr0.2Co0.8Fe0.2O32d electrodes were deposited by a wet spray technique on dense yttria-stabilized zirconia ~YSZ! layers. The morphology of the deposited perovskite thick films (;50 mm) was investigated by field emission scanning electron microscopy and showed a porous microstructure. Electrochemical impedance spectroscopy ~EIS! measurements were carried out under synthetic air flux at temperatures ranging from 200-600°C in the 10 mHz-10 MHz frequency range showing an interfacial electrical resistance related to the La0.8Sr0.2Co0.8Fe0.2O32d electrodes. EIS measurements were also performed in the same frequency range at different oxygen partial pressures (1025-1 atm) at 600°C. At this temperature and frequencies below 0.1 MHz, the electrical response to the applied signal of the electrode material is best fitted by two semicircles, which can be related to charge-transfer processes. The activation energy for the limiting step ~adsorption/desorption! was found to be 1.6 eV. © 2004 The Electrochemical Society

U2 - 10.1149/1.1824043#

DO - 10.1149/1.1824043#

M3 - Journal article

VL - 152

SP - A88-A92

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

SN - 0013-4651

IS - 1

ER -