Bi2Ru2O7 Pyrochlore Electrodes for Bi2O3 based Electrolyte for IT-SOFC Applications

Vincenzo Esposito, Bac H. Luong, Elisabetta Di Bartolomeo, Eric D. Wachsman, Enrico Traversa

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

Bismuth ruthenate pyrochlore (Bi2Ru2O7: BRO) was tested as a cathode in several bismuth oxide-based electrolyte cells. Erbium oxide stabilized bismuth oxide (ESB) (Bi2O3)0.8 (Er2O3)0.2, Bi2V0.9Me0.1O5.35 (BIMEVOX10, Me = Co, Cu, Zn), and Bi2Ru2O7 (BRO) were synthesized via solid state reaction. ESB and BIMEVOX powders were pressed and sintered into dense pellets while BRO was deposited and sintered as porous electrodes onto ESB and BIMEVOX dense pellet surfaces. Morphologies and phases of the materials were characterized by Field Emission Scanning Electron Microscope and x-ray diffraction, respectively. Electrochemical performances of BRO/ESB and BRO/BIMEVOX symmetric cells were tested using Electrochemical Impedance Spectroscopy (EIS) at 200-700 °C in air. High polarization for BIMEVOX cells was observed, while ESB cells showed a promising behaviour. Different electrochemical performances of BRO electrodes, with ESB or BIMEVOX, indicated that the phases formed at electrodes/electrolyte interface controlled the cell polarization process.
Original languageEnglish
JournalE C S Transactions
Volume1
Issue number7
Pages (from-to)263-277
ISSN1938-5862
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event208th ECS Meeting - Los Angeles, California, United States
Duration: 16 Oct 200521 Oct 2005

Conference

Conference208th ECS Meeting
CountryUnited States
CityLos Angeles, California
Period16/10/200521/10/2005

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