Design, Synthesis, Structure and Properties of Ba-Doped Derivatives of SrCo<sub>0.95</sub>Ru<sub>0.05</sub>O<sub>3−δ</sub> Perovskite as Cathode Materials for SOFCs

We have designed and prepared a novel cathode material for solid oxide fuel cell (SOFC) based on SrCo<sub>0.95</sub>Ru<sub>0.05</sub>O<sub>3&#8722;&#948;</sub> perovskite. We have partially replaced Sr by Ba in Sr<sub>0.9</sub>Ba<sub>0.1&...

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Bibliografiske detaljer
Main Authors: Sabina Sydyknazar, Vanessa Cascos, Loreto Troncoso, Ana Laura Larralde, María Teresa Fernández-Díaz, José Antonio Alonso
Format: Artigo
Sprog:Inglês
Udgivet: MDPI AG 2019-06-01
Serier:Materials
Fag:
IT-SOFC
cathode
perovskite
neutron diffraction
SrCoO<sub>3</sub>
Online adgang:https://www.mdpi.com/1996-1944/12/12/1957
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Summary:We have designed and prepared a novel cathode material for solid oxide fuel cell (SOFC) based on SrCo<sub>0.95</sub>Ru<sub>0.05</sub>O<sub>3&#8722;&#948;</sub> perovskite. We have partially replaced Sr by Ba in Sr<sub>0.9</sub>Ba<sub>0.1</sub>Co<sub>0.95</sub>Ru<sub>0.05</sub>O<sub>3&#8722;&#948;</sub> (SBCRO) in order to expand the unit-cell size, thereby improving the ionic diffusion of O<sup>2&#8722;</sup> through the crystal lattice. The characterization of this new oxide has been studied at room temperature by X-ray diffraction (XRD) and neutron powder diffraction (NPD) experiments. At room temperature, SBCRO perovskite crystallizes in the P4/mmm tetragonal space group, as observed from NDP data. The maximum conductivity value of 18.6 S cm<sup>&#8722;1</sup> is observed at 850 &#176;C. Polarization resistance measurements on LSGM electrolyte demonstrate an improvement in conductivity with respect to the parent Sr-only perovskite cathode. A good chemical compatibility and an adequate thermal expansion coefficient make this oxide auspicious for using it as a cathode in SOFC.
ISSN:1996-1944

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