Potentiality of cobalt-free perovskite Ba0.5Sr 0.5Fe0.9Mo0.1O3-δ as a single-phase cathode for intermediate-to-low-temperature solid oxide fuel cells

Yihan Ling, Xiaozhen Zhang, Zhenbin Wang, Songlin Wang, Ling Zhao*, Xingqin Liu, Lin Bin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Cobalt-free perovskite Ba0.5Sr0.5Fe 0.9Mo0.1O3-δ (BSFMo) was investigated as a single-phase cathode for intermediate-to-low-temperature solid oxide fuel cells (IL-SOFCs). The X-ray diffraction (XRD) Rietveld refinement, electrical conductivity, thermogravimetric (TG) measurements, the phase reaction were investigated. The doping of high-valence Mo cations into Fe-site obviously enhanced the electrical conductivity of BSFMo sample with the maximum value of 174 S cm-1. XRD results showed that BSFMo cathode was chemically compatible with the BaZr0.1Ce0.7Y0.1Yb 0.1O3-δ (BZCYYb) electrolyte for temperatures up to 1000 C. Laboratory-sized tri-layer cells of NiO-BZCYYb/BZCYYb/BSFMo were operated from 550 to 700 C with humidified hydrogen (∼3% H2O) as fuel and the static air as oxidant, respectively. An open-circuit potential of 1.001 V, the maximum power density of 428 mW cm-2, and a low electrode polarization resistance of 0.148 Ω cm2 were achieved at 700 C. The experimental results indicated that the single-phase BSFMo is a promising candidate as cathode material for IL-SOFCs.

Original languageEnglish (US)
Pages (from-to)14323-14328
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number33
DOIs
StatePublished - Nov 4 2013

Keywords

  • Chemically compatible
  • Intermediate-to-low-temperature solid oxide fuel cells
  • Polarization resistance
  • Single-phase cathode

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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