Electrical Properties of Ba3Ca1.18Nb1.82O9- Proton-Conducting Electrolyte Prepared by a Combustion Method

Lei Bi, Enrico Traversa

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Ba3Ca1.18Nb1.82O9-δ (BCN18), regarded as a promising proton-conducting electrolyte material for solid oxide fuel cells, is usually synthesized by a solid-state reaction because of the limited choice of Nb precursors. This study presents a wet chemical route for preparing BCN18 powders that were then sintered into pellets. Electrochemical impedance spectroscopy studies indicated that BCN18 pellets show proton conductivity, since their total conductivity in wet air was significantly larger than that in dry air. However, a detailed analysis showed that only the BCN18 bulk behaves as a proton conductor, while its grain boundary conductivity did not increase in wet air.
Original languageEnglish (US)
Pages (from-to)1069-1075
Number of pages7
JournalECS Transactions
Issue number1
StatePublished - Oct 7 2013

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