Pr2Ni0.71Cu0.24Ga0.05O4-Sm0.2Ce0.8O1.9 composite film as active cathodic layer for intermediate temperature solid oxide fuel cells

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    Abstract

    Interlayer composite thin film of Pr2Ni0.71Cu0.24Ga0.05O4-Sm0.2Ce0.8O1.9 (PNCG-SDC) was deposited between the La0.9Sr0.2Ga0.8Mg0.2O3-δ (LSGM) thin film and Sm0.5Sr0.5CoO3-δ (SSC) powder cathode for increasing the cathodic activity for intermediate temperature solid oxide fuel cells (IT-SOFCs). It was found that cathodic overpotential was decreased by introduction of PNCG-SDC composite film resulting in the increased power density on both anode and electrolyte supported LSGM cell. The maximum power density of the anode supported cell using PNCG-SDC film was increased to 2.35 and 0.3 W/cm2 at 700 and 500 °C, respectively, which is higher than that of the cell without PNCG-SDC film. The activation energy estimated by cathodic overpotential indicated that PNCG-SDC film was effective for increasing the activity of active sites. Based on these results, PNCG-SDC composited film, which may be double columnar structure, was highly effective for increasing cathodic performance to oxygen reduction at intermediate temperature.

    Original languageEnglish
    Pages (from-to)59-63
    Number of pages5
    JournalSolid State Ionics
    Volume327
    DOIs
    Publication statusPublished - Dec 1 2018

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics

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