High conductivity and chemical stability of BaCe1-x-yZrxYyO3-d proton conductors prepared by a sol–gel method (Articolo in rivista)

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Label
  • High conductivity and chemical stability of BaCe1-x-yZrxYyO3-d proton conductors prepared by a sol–gel method (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/b808344d (literal)
Alternative label
  • S. Barison; M. Battagliarin; T. Cavallin; L. Doubova; M. Fabrizio; C. Mortalò; S. Boldrini; L. Malavasi; R. Gerbasi (2008)
    High conductivity and chemical stability of BaCe1-x-yZrxYyO3-d proton conductors prepared by a sol–gel method
    in Journal of materials chemistry (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. Barison; M. Battagliarin; T. Cavallin; L. Doubova; M. Fabrizio; C. Mortalò; S. Boldrini; L. Malavasi; R. Gerbasi (literal)
Pagina inizio
  • 5120 (literal)
Pagina fine
  • 5128 (literal)
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  • IF 2007 = 4.339 (literal)
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  • http://pubs.rsc.org/en/Content/ArticleLanding/2008/JM/b808344d (literal)
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  • 18 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1-6 :CNR IENI, Corso Stati Uniti 4, I-35127 Padova, Italy / 7 : CNR ISIB, Corso Stati Uniti 4, 35127 PADOVA, Italy / 8 : University of Pavia, INSTM and CNR – IENI Pavia, Viale Taramelli 16, 27100 Pavia, Italy / 9 : CNR ICIS, Corso Stati Uniti 4, 35127 Padova, Italy (literal)
Titolo
  • High conductivity and chemical stability of BaCe1-x-yZrxYyO3-d proton conductors prepared by a sol–gel method (literal)
Abstract
  • High-temperature proton conductors are promising as electrolytes for intermediate-temperature solidoxide fuel cells. Among them, BaCeO3-based materials have high proton conductivity but rather poor chemical stability. In contrast, barium zirconates are rather stable, but have poorly reproducible densities and conductivities. In this study, the investigation of BaCe1-x-yZrxYyO3-d solid solutions (x = 0, 0.10, 0.20, 0.30, 0.40; y = 0.15, 0.20) was undertaken, with the final aim of finding a composition having both high conductivity and good stability. The influence of the modified sol–gel Pechini synthetic approach on the powder morphology, and of a barium excess on the densification were demonstrated. Single-phase perovskite powders were prepared and high density pellets were obtained at temperatures lower than those commonly employed. Stability tests demonstrated that the Zr introduction into doped barium cerate greatly enhanced the chemical stability, particularly for Zr - 20%. The proton conductivities, measured in a humidified H2/Ar atmosphere by impedance spectroscopy, were only slightly influenced by the Zr amount. Overall, BaCe1-x-yZrxYyO3-d solid solutions having Zr ca. 20-40% and Y ca. 15-20% showed good chemical stability and high conductivity. (literal)
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