Ceria interlayer-free Ba0.5Sr0.5Co 0.8Fe0.2O3-δ-Sc0.1Zr 0.9O1.95 composite cathode on zirconia based electrolyte for intermediate temperature solid oxide fuel cells

Seong Oh Lee, Daehee Lee, Inyong Jung, Dongha Kim, Sang Hoon Hyun, Joosun Kim, Jooho Moon

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We synthesized Ba0.5Sr0.5Co0.8Fe 0.2O3-δ (BSCF) powders with a primary particle size of 20 nm using a Pechini type method. By using nanocrystalline BSCF powders, we were able to fabricate a ceria interlayer-free nanoporous cathode on a scandia stabilized zirconia (ScSZ) electrolyte at low temperatures. Cathodes sintered below 750 C lacked sufficient mechanical adhesion to the electrolyte, while electrode was well adhered to the electrolyte when fired at 800 C. The symmetrical BSCF-ScSZ|yttria stabilized zirconia (YSZ)|BSCF-ScSZ half-cell that we generated had an exceptionally low polarization resistance of 0.06 Ω·cm2 at 700 C. The maximum power density of the BSCF-ScSZ|ScSZ|Ni-ScSZ unit cell was over 1 W cm-2 at 700 C. We investigated the durability of the BSCF-ScSZ composite cathode by 30 thermo-cycles performed by varying the temperature from 200 to 700 C. The polarization resistance after the test remained low at less than 0.08 Ω·cm2.

Original languageEnglish
Pages (from-to)9320-9329
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number22
DOIs
Publication statusPublished - 2013 Jul 26

All Science Journal Classification (ASJC) codes

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

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