A stable La1.95Ca0.05Ce2O 7-δ as the electrolyte for intermediate-temperature solid oxide fuel cells

Zetian Tao, Lei Bi, Shuming Fang, Wei Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The La1.95Ca0.05Ce2O7-δ (LCCO) material is successfully synthesized using the Pechini method. The synthesized powders are exposed to atmospheric CO2 and H2 with 3% H2O at 700 °C. The treated LCCO powders are investigated using X-ray diffraction (XRD) to study the chemical stability. According to the XRD results, LCCO is very stable and shows no reactions with CO2 or H2O. A fuel cell with the LCCO electrolyte is prepared using the suspension spray method and is tested in the range from 600 °C to 700 °C using humidified hydrogen (∼3% H2O) as the fuel and static air as the oxidant. An open-circuit potential of 0.832 V and a maximum power density of 259 mW cm-2 are obtained for a single cell with an interface resistance of 0.23 Ω cm2 at 700 °C.

Original languageEnglish (US)
Pages (from-to)5840-5843
Number of pages4
JournalJournal of Power Sources
Volume196
Issue number14
DOIs
StatePublished - Jul 15 2011

Keywords

  • Chemical stability
  • In situ sintering
  • Pechini method
  • Solid oxide fuel cells
  • Spray

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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