Development of a novel type of composite cathode material for proton-conducting solid oxide fuel cells

Yihan Ling, Xiahui Yao, Xiaozhen Zhang, Xingqin Liu*, Lin Bin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

A high-performance solid oxide fuel cell La1-xSr xMnO3 (LSM) cathode/metallic interconnect contact material Ni1-xCoxO, added with the mixed ionic-electronic conducting Sm0.2Ce0.8O2-δ (SDC), was proposed as a novel composite cathode for proton-conducting solid oxide fuel cells (H-SOFCs) with BaZr0.1Ce0.7Y0.1Yb 0.1O3-δ (BZCYYb) as the electrolyte. The X-ray diffraction (XRD) results indicated that the maximum doped ratio of Ni 1-xCoxO was Ni0.7Co0.3O (NC3O), also shown that NC3O was chemically compatible with SDC at temperatures up to 1400 °C. The TEC of NC3O was also measured to check its thermal compatibility with other components. Laboratory-sized tri-layer cells of NiO-BZCYYb/BZCYYb/ NC3O-SDC were fabricated and tested with humidified hydrogen (∼3% H 2O) as fuel and static air as oxidant, respectively. A maximum power density of 204 mW cm-2 and a low interfacial polarization resistance Rp of 0.683 Ω cm2 were achieved at 700 °C. The results have indicated that the NC3O-SDC composite is a simple, stable and cost-effective cathode material for H-SOFCs.

Original languageEnglish (US)
Pages (from-to)5940-5945
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number7
DOIs
StatePublished - Apr 1 2012

Keywords

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

ASJC Scopus subject areas

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

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