Structural analysis,phase stability and electrochemical characterization of Nb-doped BaCe0.9Y0.1O3-y electrolyte for IT-SOFCs

Antonino Martorana, Francesco Giannici, Alessandra D'Epifanio, Elisabetta Di Bartolomeo, Silvia Licoccia, Alessandro Longo, Chiara Pugnalini

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To improve the chemical stability of high temperature proton conductors based on barium cerate, electrolyte powders doped with different amounts of niobium were synthesized by the citrate–nitrate auto-combustion method. Pure single phases of BaCe0.9−xNbxY0.1O3−x (BCYN, 0.03 ≤ x ≤ 0.12) were obtained by thermal treatment at 1000 °C. Sintering at 1450 °C for 10 h produced dense pellets. X-ray absorption spectroscopy allowed to define the dopant ion insertion site and the co-dopant valency. Treatments in pure CO2 atmosphere at 700 °C for 3 h and subsequent XRD analysis were carried out to probe the chemical stability of the produced electrolytes. The influence of the presence of Nb5+ on conductivity has been investigated by electrochemical impedance spectroscopy (EIS) measurements. Polarization curves were acquired in the 400–750 °C temperature range.
Original languageEnglish
Pages (from-to)-
Number of pages0
JournalJournal of Power Sources
Publication statusPublished - 2011


All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology

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