Investigation of cobalt-free cathode material Sm0.5Sr 0.5Fe0.8Cu0.2O3-δ for intermediate temperature solid oxide fuel cell

Yihan Ling, Ling Zhao, Lin Bin, Yingchao Dong, Xiaozhen Zhang, Guangyao Meng, Xingqin Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

A cobalt-free cubic perovskite oxide Sm0.5Sr 0.5Fe0.8Cu0.2O3-δ (SSFCu) was investigated as a novel cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The thermal expansion coefficient (TEC) of SSFCu was close to that of Sm0.2Ce0.8O1.9(SDC) electrolyte and the electrical conductivity of SSFCu sample reached 72-82 S cm-1 in the commonly operated temperatures of IT-SOFCs (400-600 °C). Symmetrical electrochemical cell with the configuration of SSFCu/SDC/SSFCu was applied for the impedance study and area specific resistance (ASR) of SSFCu cathode material was as low as 0.085 Ω cm2 at 700 °C. Laboratory-sized tri-layer cells of NiO-SDC/SDC/SSFCu were operated from 450 to 700 °C with humidified hydrogen (∼3% H2O) as fuel and the static air as oxidant. A maximum power density of 808 mW cm2 was obtained at 700 °C for the single cell.

Original languageEnglish (US)
Pages (from-to)6905-6910
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number13
DOIs
StatePublished - Jul 1 2010

Keywords

  • Cobalt-free cathode
  • Intermediate-temperature solid oxide fuel cell
  • Symmetrical electrochemical cell
  • Thermal expansion coefficient

ASJC Scopus subject areas

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

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