Synthesis and electrochemical characterization of La0.6Sr0.4Co0.2Fe0.8O3–δ / Ce0.9Gd0.1O1.95 co-electrospun nanofiber cathodes for intermediate-temperature solid oxide fuel cells

Caterina Sanna, Wenjing Zhang, Paola Costamagna*, Peter Holtappels

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Synthesis and electrochemical characterization of composite cathodes, formed from a mixture of La0.6Sr0.4Co0.2Fe0.8O3–δ (LSCF) and Ce0.9Gd0.1O1.95 (GDC) nanofibers, is reported. The electrodes are obtained by simultaneous electrospinning of the two precursor solutions, using apparatus equipped with two spinnerets working in parallel. Results of electrochemical testing carried out through electrochemical impedance spectroscopy (EIS) are presented and discussed. The results suggest that the electrochemical reaction takes place in an electrode region close to the electrode/current collector interface and that the oxygen ions then flow along the ionic conducting path of the GDC fibers. At 650 °C, the polarization resistance is Rp = 5.6 Ω cm−2, in line with literature values reported for other IT-SOFC cathodes.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
ISSN0360-3199
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Electrochemical impedance spectroscopy (EIS)
  • Electrospinning
  • Intermediate temperature-Solid oxide fuel cell
  • Mixed ionic electronic conductor (MIEC)
  • Percolation

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