Layered perovskite LaBaCuMO5+x (M = Fe, Co) cathodes for intermediate-temperature protonic ceramic membrane fuel cells

Yihan Ling, Lin Bin, Ling Zhao, Xiaozhen Zhang, Jia Yu, Ranran Peng, Guangyao Meng, Xingqin Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Layered perovskite LaBaCuFeO5+x (LBCF) and LaBaCuCoO5+x (LBCC) oxides are synthesized by a modified Pechini method and examined as potential cathode materials for intermediate-temperature protonic ceramic membrane fuel cells (IT-PCMFCs). Thin proton-conducting BaZr0.1Ce0.7Y0.2O3-δ (BZCY) electrolyte and NiO-BaZr0.1Ce0.7Y0.2O3-δ (NiO-BZCY) anode functional layer are prepared over porous anode substrates composed of NiO-BaZr0.1Ce0.7Y0.2O3-δ by a one-step dry-pressing/co-firing process. Laboratory-sized quad-layer cells of NiO-BYCZ/NiO-BYCZ/BYCZ/LBCF (LBCC) are operated from 550 to 700 °C with humidified hydrogen (∼3% H2O) as fuel and the static air as oxidant. The single cell with LBCF cathode shows peak power densities of only 327 mW cm-2 at 700 °C and 105 mW cm-2 for 550 °C, while the single cell with LBCC cathode shows peak power densities of 432 and 171 mW cm-2 at 700 and 550 °C, respectively. The dramatic improvement of cell performance is attributed to higher cobaltites catalytic activity than that of ferrites for IT-PCMFCs, which is in good agreement with the results of impedance measurement.

Original languageEnglish (US)
Pages (from-to)252-255
Number of pages4
JournalJournal of Alloys and Compounds
Volume493
Issue number1-2
DOIs
StatePublished - Mar 18 2010

Keywords

  • Cathode
  • Layered perovskite
  • Polarization resistance
  • Protonic ceramic membrane fuel cells

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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