Comparative study of electrochemical properties of different composite cathode materials associated to stable proton conducting BaZr0.7Pr0.1Y0.2O3-δ electrolyte

Yihan Ling*, Fang Wang, Ling Zhao, Xingqin Liu, Lin Bin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

High-temperature proton conductor BaZr0.7Pr0.1Y0.2O3-δ (BZPY) was investigated as electrolyte for intermediate temperatures (400-800 °C) solid oxide fuel cells (IT-SOFCs), which exhibited excellent chemical stability in atmospheres containing CO2 and water vapor. In addition, both La0.4Sr0.6Co0.2Fe0.8O3-δ-BaZr0.7Pr0.1Y0.2O3-δ (LSCF-BZPY) and La0.4Sr0.6Co0.2Fe0.8O3-δ-Ce0.8Sm0.2O1.9 (LSCF-SDC) composite oxides were fabricated and evaluated as working cathodes for anode-supported IT-SOFCs based upon thin BZPY electrolytes. The single cells with LSCF-BZPY cathode showed the maximum power density of 86.7 mW cm-2 at 700 °C and the calculated activation energy was 91.19 kJ mol-1. While the cells with LSCF-SDC cathode exhibited the higher maximum power density of 112.4 mW cm-2 at 700 °C and the calculated activation energy was 101.61 kJ mol-1. The experimental results indicated that proton electron mixed conducting composite cathodes are more promising and beneficial than oxygen-ion electron mixed conducting composite cathodes for proton-conducting SOFCs during actual low operating temperatures.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalElectrochimica Acta
Volume146
DOIs
StatePublished - Oct 1 2014

Keywords

  • Chemical stability
  • Intermediate temperature solid oxide fuel
  • Oxygen-ion electron mixed conductor
  • Proton electron mixed conductor
  • cells

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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