Growth of Gd0.3Ca2.7Co3.82Cu0.18O9-δ-BaCe0.6Zr0.2Y0.2O3-δ bulk heterojunction cathode interlayer by pulsed laser deposition for enhancing protonic solid oxide fuel cell performance

Muhammad Abdullah Umer, Cheng Yang Cheng, Bo Ruei Lai, Chung Jen Tseng, Szu yuan Chen, Sheng Wei Lee

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The triple-conducting (e/H+/O2−) oxides have been extensively studied as the most promising cathode materials for protonic solid oxide fuel cells (P-SOFCs) because of their excellent catalytic activity at lower operating temperatures of <600 °C. However, direct application of these cathode materials by brush-painting or screen-printing provides limited contact area with the underlying electrolyte layer, resulting in high cathode ohmic and polarization resistances. In this study, it is demonstrated that a bulk heterojunction Gd0.3Ca2.7Co3.82Cu0.18O9-δ (GCCCO)-BaCe0.6Zr0.2Y0.2O3-δ (BCZY) layer with a domain width of ∼5 nm can be grown by pulsed laser deposition (PLD) via spontaneous phase separation. Such a nanocomposite interlayer between spin-coated BCZY electrolyte and brush-painted GCCCO cathode can effectively increases the interfacial area between the two distinct phases and facilitates proton transport across the interface. This electrode design reduces the ohmic resistance by 0.35 Ω cm2 and the polarization resistance by a factor of three, thus significantly boosting the cell performance.

Original languageEnglish
Article number158139
JournalApplied Surface Science
Volume638
DOIs
StatePublished - 30 Nov 2023

Keywords

  • Bulk heterojunction interlayer
  • Proton-conducting electrolyte
  • Pulsed laser deposition
  • Solid oxide fuel cell
  • Triple-conducting cathode

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