Bismuth and indium co-doping strategy for developing stable and efficient barium zirconate-based proton conductors for high-performance H-SOFCs

Yihan Ling, Hui Chen, Jinan Niu, Fang Wang, Ling Zhao, Xuemei Ou, Takashi Nakamura, Koji Amezawa

    Research output: Contribution to journalArticlepeer-review

    44 Citations (Scopus)

    Abstract

    High-temperature proton conductors gained ever-increasing interest as electrolyte materials alternative to oxygen-ion conductors due to their high conductivity associated with low activation energy at reduced temperatures. In this study, we reported our findings on chemically stable, easily sintered and highly proton-conductive BaZrO3 oxides with Bi2O3 and In2O3 co-addition as electrolyte materials for proton conducting solid oxide fuel cells (H-SOFCs). Among the composition series, BaZr0.75In0.2Bi0.05O3−δ (BZIB5) exhibited the improved sinterability and good conductivity. Correspondingly, high-temperature gravimetry results indicated that the concentrations of protonic defect and oxygen vacancy strongly depended on P(H2O) and temperature rather than P(O2). Importantly, single cells with 12-μm-dense BZIB5 electrolyte films were successfully fabricated, and achieved high performance with the maximum power density of 0.34 Wcm−2 at 700 °C. The encouraging results demonstrated that BZIB5 is a promising candidate as the electrolyte material for high performance H-SOFCs.

    Original languageEnglish
    Pages (from-to)3423-3431
    Number of pages9
    JournalJournal of the European Ceramic Society
    Volume36
    Issue number14
    DOIs
    Publication statusPublished - 2016 Nov 1

    Keywords

    • High-temperature proton conductor
    • Proton conducting solid oxide fuel cells
    • Protonic defect
    • Sinterability

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry

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