A cobalt-free SrFe0.9Sb0.1O3-δ cathode material for proton-conducting solid oxide fuel cells with stable BaZr0.1Ce0.7Y0.1Yb0.1O3-δ electrolyte

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

A cobalt-free cubic perovskite oxide SrFe0.9Sb0.1O3-δ (SFSb) is investigated as a novel cathode for proton-conducting solid oxide fuel cells (H-SOFCs). XRD results show that SFSb cathode is chemically compatible with the electrolyte BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb) for temperatures up to 1000 °C. Thin proton-conducting BZCYYb electrolyte and NiO-BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (NiO-BZCYYb) anode functional layer are prepared over porous anode substrates composed of NiO-BZCYYb by a one-step dry-pressing/co-firing process. Laboratory-sized quad-layer cells of NiO-BZCYYb/NiO-BZCYYb/BZCYYb/SFSb are operated from 550 to 700 °C with humidified hydrogen (∼3% H2O) as fuel and the static air as oxidant. An open-circuit potential of 0.996 V, maximum power density of 428 mW cm-2, and a low electrode polarization resistance of 0.154 Ω cm2 are achieved at 700 °C. The experimental results indicate that the cobalt-free SFSb is a promising candidate for cathode material for H-SOFCs.

Original languageEnglish (US)
Pages (from-to)7042-7045
Number of pages4
JournalJournal of Power Sources
Volume195
Issue number20
DOIs
StatePublished - Oct 15 2010

Keywords

  • Chemically compatible
  • Cobalt-free cathode
  • Polarization resistance
  • Proton-conducting solid oxide fuel cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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