Preparation and characterization of Ba 0.5Sr 0.5Fe 0.9Ni 0.1O 3-δ-Sm 0.2Ce 0.8O 1.9 compose cathode for proton-conducting solid oxide fuel cells

Yanzhi Ding, Yonghong Chen, Xiaoyong Lu*, Lin Bin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A cobalt-free Ba 0.5Sr 0.5Fe 0.9Ni 0.1O 3-δ-Sm 0.2Ce 0.8O 1.9 (BSFN-SDC) composite was employed as a cathode for proton-conducting solid oxide fuel cells (H-SOFCs) using BaZr 0.1Ce 0.7Y 0.2O 3-δ (BZCY) as the electrolyte. The chemical compatibility between BSFN and SDC was evaluated. The XRD results showed that BSFN was chemically compatible with SDC after co-fired at 1100°C for 5 h. The thermal expansion coefficient (TEC) of BSFN-SDC, which showed a reasonably reduced value (16.08 × 10 -6 K -1), was effectively decreased due to Ce 0.8Sm 0.2O 1.9 (SDC) added. A single cell of Ni-BZCY/Ni-BZCY/ BZCY/BSFN-SDC with a 25-μm-thick BZCY electrolyte membrane exhibited excellent power densities as high as 361.8 mW cm -2 at 700°C with a low polarization resistance of 0.174 Ω cm 2. The excellent performance implied that the cobalt-free BSFN-SDC composite was a promising alternative cathode for H-SOFCs.

Original languageEnglish (US)
Pages (from-to)9830-9835
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number12
DOIs
StatePublished - Jun 1 2012

Keywords

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