Pb2Ru2O6.5 as a low temperature cathode for bismuth oxide electrolytes

Vincenzo Esposito, Enrico Traversa, Eric D. Wachsman

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A chemical route, called direct condensation method DCM, was developed to synthesize nanometric Pb2Ru2O6.5 as a cathode material for intermediate temperature solid oxide fuel cells. The electrolyte used was Er2O30.2Bi2O30.8 ESB. Porous lead ruthenate and ESB-lead ruthenate composite electrodes were deposited onto dense ESB pellets. X-ray diffraction, field-emission scanning electron microscopy, and energy dispersive spectroscopy analysis were used to investigate the reactivity and the morphology of the materials prepared. Electrochemical impedance spectroscopy in air at different operating temperatures was used to evaluate polarization and electrical performance of cells in symmetric configuration. Lead ruthenate-based electrodes were sintered at different temperatures to understand the role of the triple-phase boundary on the electrode polarization. An increase in the sintering temperature induced the formation of intermediate phases at the interface between ESB and the pyrochlore, thereby resulting in an increase in the polarization resistance at the electrode/electrolyte interface of the symmetric cells. © 2005 The Electrochemical Society.
Original languageEnglish
JournalJournal of The Electrochemical Society
Volume152
Issue number12
Pages (from-to)A2300-A2305
ISSN0013-4651
DOIs
Publication statusPublished - 2005
Externally publishedYes

Cite this

Esposito, Vincenzo ; Traversa, Enrico ; Wachsman, Eric D. / Pb2Ru2O6.5 as a low temperature cathode for bismuth oxide electrolytes. In: Journal of The Electrochemical Society. 2005 ; Vol. 152, No. 12. pp. A2300-A2305.
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title = "Pb2Ru2O6.5 as a low temperature cathode for bismuth oxide electrolytes",
abstract = "A chemical route, called direct condensation method DCM, was developed to synthesize nanometric Pb2Ru2O6.5 as a cathode material for intermediate temperature solid oxide fuel cells. The electrolyte used was Er2O30.2Bi2O30.8 ESB. Porous lead ruthenate and ESB-lead ruthenate composite electrodes were deposited onto dense ESB pellets. X-ray diffraction, field-emission scanning electron microscopy, and energy dispersive spectroscopy analysis were used to investigate the reactivity and the morphology of the materials prepared. Electrochemical impedance spectroscopy in air at different operating temperatures was used to evaluate polarization and electrical performance of cells in symmetric configuration. Lead ruthenate-based electrodes were sintered at different temperatures to understand the role of the triple-phase boundary on the electrode polarization. An increase in the sintering temperature induced the formation of intermediate phases at the interface between ESB and the pyrochlore, thereby resulting in an increase in the polarization resistance at the electrode/electrolyte interface of the symmetric cells. {\circledC} 2005 The Electrochemical Society.",
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Pb2Ru2O6.5 as a low temperature cathode for bismuth oxide electrolytes. / Esposito, Vincenzo; Traversa, Enrico; Wachsman, Eric D.

In: Journal of The Electrochemical Society, Vol. 152, No. 12, 2005, p. A2300-A2305.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Pb2Ru2O6.5 as a low temperature cathode for bismuth oxide electrolytes

AU - Esposito, Vincenzo

AU - Traversa, Enrico

AU - Wachsman, Eric D.

PY - 2005

Y1 - 2005

N2 - A chemical route, called direct condensation method DCM, was developed to synthesize nanometric Pb2Ru2O6.5 as a cathode material for intermediate temperature solid oxide fuel cells. The electrolyte used was Er2O30.2Bi2O30.8 ESB. Porous lead ruthenate and ESB-lead ruthenate composite electrodes were deposited onto dense ESB pellets. X-ray diffraction, field-emission scanning electron microscopy, and energy dispersive spectroscopy analysis were used to investigate the reactivity and the morphology of the materials prepared. Electrochemical impedance spectroscopy in air at different operating temperatures was used to evaluate polarization and electrical performance of cells in symmetric configuration. Lead ruthenate-based electrodes were sintered at different temperatures to understand the role of the triple-phase boundary on the electrode polarization. An increase in the sintering temperature induced the formation of intermediate phases at the interface between ESB and the pyrochlore, thereby resulting in an increase in the polarization resistance at the electrode/electrolyte interface of the symmetric cells. © 2005 The Electrochemical Society.

AB - A chemical route, called direct condensation method DCM, was developed to synthesize nanometric Pb2Ru2O6.5 as a cathode material for intermediate temperature solid oxide fuel cells. The electrolyte used was Er2O30.2Bi2O30.8 ESB. Porous lead ruthenate and ESB-lead ruthenate composite electrodes were deposited onto dense ESB pellets. X-ray diffraction, field-emission scanning electron microscopy, and energy dispersive spectroscopy analysis were used to investigate the reactivity and the morphology of the materials prepared. Electrochemical impedance spectroscopy in air at different operating temperatures was used to evaluate polarization and electrical performance of cells in symmetric configuration. Lead ruthenate-based electrodes were sintered at different temperatures to understand the role of the triple-phase boundary on the electrode polarization. An increase in the sintering temperature induced the formation of intermediate phases at the interface between ESB and the pyrochlore, thereby resulting in an increase in the polarization resistance at the electrode/electrolyte interface of the symmetric cells. © 2005 The Electrochemical Society.

U2 - 10.1149/1.2097036

DO - 10.1149/1.2097036

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SP - A2300-A2305

JO - Journal of The Electrochemical Society

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SN - 0013-4651

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