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    Yttrium and Nickel Co-Doped BaZrO3 as a Proton-Conducting Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells

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    Type
    Conference Paper
    Authors
    Shafi, Shahid Pottachola
    Bi, Lei
    Boulfrad, Samir
    Traversa, Enrico cc
    KAUST Department
    Material Science and Engineering Program
    Materials for Energy Conversion and Storage (MECS) Lab
    Physical Science and Engineering (PSE) Division
    Date
    2015-07-17
    Online Publication Date
    2015-07-17
    Print Publication Date
    2015-07-17
    Permanent link to this record
    http://hdl.handle.net/10754/594125
    
    Metadata
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    Abstract
    High temperature proton conducting oxides, due to their lower activation energy for proton conduction, can achieve high conductivity at relatively low temperatures (500-700°C). Though BaZr0.8Y0.2O3-δ (BZY) perovskite exhibits good chemical stability and high bulk conductivity, high grain boundary resistance decreases its total conductivity. This work focuses on substitution of Zr4+ with Ni2+ in the perovskite B-site in a targeted fashion in order to promote the sinterability of BZY. Powder X-ray diffraction analysis showed the formation of single phases for Ba0.8-xY0.2NixO3-δ compositions up to x = 0.04. Scanning electron microscopy (SEM) image analysis demonstrated that densification is promoted by increasing the Ni-content, reaching a fully dense microstructure for Ba0.76Y0.2Ni0.04O3-δ (BZYNi04). An anode supported single cell based on BZYNi04 electrolyte showed superior power performance, achieving 240 and 428 mW cm-2 at 600 and 700°C, respectively. © The Electrochemical Society.
    Citation
    P. Shafi S, Bi L, Boulfrad S, Traversa E (2015) Yttrium and Nickel Co-Doped BaZrO3 as a Proton-Conducting Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells. ECS Transactions 68: 503–508. Available: http://dx.doi.org/10.1149/06801.0503ecst.
    Publisher
    The Electrochemical Society
    Journal
    ECS Transactions
    Conference/Event name
    14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
    DOI
    10.1149/06801.0503ecst
    ae974a485f413a2113503eed53cd6c53
    10.1149/06801.0503ecst
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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