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    An easily sintered, chemically stable, barium zirconate-based proton conductor for high-performance proton-conducting solid oxide fuel cells

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    Type
    Article
    Authors
    Sun, Wenping
    Shi, Zhen
    Liu, Mingfei
    Bi, Lei
    Liu, Wei
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2014-07-25
    Online Publication Date
    2014-07-25
    Print Publication Date
    2014-09
    Permanent link to this record
    http://hdl.handle.net/10754/566071
    
    Metadata
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    Abstract
    Yttrium and indium co-doped barium zirconate is investigated to develop a chemically stable and sintering active proton conductor for solid oxide fuel cells (SOFCs). BaZr0.8Y0.2-xInxO3- δ possesses a pure cubic perovskite structure. The sintering activity of BaZr0.8Y0.2-xInxO3- δ increases significantly with In concentration. BaZr0.8Y0.15In0.05O3- δ (BZYI5) exhibits the highest total electrical conductivity among the sintered oxides. BZYI5 also retains high chemical stability against CO2, vapor, and reduction of H2. The good sintering activity, high conductivity, and chemical stability of BZYI5 facilitate the fabrication of durable SOFCs based on a highly conductive BZYI5 electrolyte film by cost-effective ceramic processes. Fully dense BZYI5 electrolyte film is successfully prepared on the anode substrate by a facile drop-coating technique followed by co-firing at 1400 °C for 5 h in air. The BZYI5 film exhibits one of the highest conductivity among the BaZrO3-based electrolyte films with various sintering aids. BZYI5-based single cells output very encouraging and by far the highest peak power density for BaZrO3-based proton-conducting SOFCs, reaching as high as 379 mW cm-2 at 700 °C. The results demonstrate that Y and In co-doping is an effective strategy for exploring sintering active and chemically stable BaZrO3-based proton conductors for high performance proton-conducting SOFCs. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Citation
    Sun, W., Shi, Z., Liu, M., Bi, L., & Liu, W. (2014). An Easily Sintered, Chemically Stable, Barium Zirconate-Based Proton Conductor for High-Performance Proton-Conducting Solid Oxide Fuel Cells. Advanced Functional Materials, 24(36), 5695–5702. doi:10.1002/adfm.201401478
    Sponsors
    This work was supported by the Ministry of Science and Technology of China (Grant No. 2012CB215403).
    Publisher
    Wiley
    Journal
    Advanced Functional Materials
    DOI
    10.1002/adfm.201401478
    ae974a485f413a2113503eed53cd6c53
    10.1002/adfm.201401478
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division

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