Pr 2 Ni 0.71 Cu 0.24 Ga 0.05 O 4 -Sm 0.2 Ce 0.8 O 1.9 composite film as active cathodic layer for intermediate temperature solid oxide fuel cells

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Abstract

Interlayer composite thin film of Pr 2 Ni 0.71 Cu 0.24 Ga 0.05 O 4 -Sm 0.2 Ce 0.8 O 1.9 (PNCG-SDC) was deposited between the La 0.9 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ (LSGM) thin film and Sm 0.5 Sr 0.5 CoO 3-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/cm 2 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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