Robust doped BaCeO3-δ electrolyte for IT-SOFCs
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Single phase polycrystalline BaZr0.3Ce0.5Y0.1Yb0.1O3 - δ electrolyte material was prepared by solid state reaction route. Rietveld analysis of the XRD data confirms the tetragonal sym¬metry in the I4/mcm space group with unit cell parameters of a = b = 6.0567(3) Å and c = 8.5831(5) Å. The addition ofZnO as a sintering additive was found to reduce the sintering temperature and enhance both overall sinterability and grain growth. Sintering temperature was reduced by 200–300 °C, and a very high relative density of about 98% was achieved at 1400 °C. Impedance spectroscopy in humidified 5% H2/Ar atmosphere shows that the protonic conductivity at 600 °C was 8.60 × 10−3 S cm−1. Thermal analysis performed in pure CO2 atmosphere shows very good chemical stability up to 1200 °C. Good biaxial flexure strength of 100–200 MPa was reported which makes this material a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs).
Khan , M N , Azad , A K , Savaniu , C D , Hing , P & Irvine , J T S 2017 , ' Robust doped BaCeO 3-δ electrolyte for IT-SOFCs ' , Ionics , vol. 23 , no. 9 , pp. 2387-2396 . https://doi.org/10.1007/s11581-017-2086-x
© Springer-Verlag Berlin Heidelberg 2017. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1007/s11581-017-2086-x
DescriptionThe authors are grateful for the financial help from the S & T grant no.17. M Naeem Khan is grateful for the Graduate Research Fellowship of Universiti Brunei Darussalam.
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