Sm0.5Sr0.5CoO3-Ce1.8Sm0.2O1.9electrodes enhanced by Sm0.5Sr0.5CoO3impregnation for proton conductor based solid oxide fuel cells

Feng Su, Yanxiang Zhang, Meng Ni, Changrong Xia

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)

Abstract

Sm0.5Sr0.5CoO3-δ-Ce0.8Sm0.2O2-δ(SSC-SDC) composites, which are often used as the cathodes for solid oxide fuel cells (SOFCs) with oxygen-ion conducting electrolytes, have been recently shown to be also applicable in SOFCs based on proton conductors such as BaZr0.1Ce0.7Y0.2O3-δ(BZCY). The electrochemical performances of blank SSC-SDC electrodes on BZCY electrolytes are substantially improved in this work by impregnating SSC nanoparticles additionally. When the loading increases, the interfacial polarization resistance of the symmetric cell decreases gradually at first, notably when it exceeds 14 wt.%, and to the lowest value at about 22 wt.%. Furthermore, impregnating SSC reduces the low-frequency-arc resistance that corresponds to the surface exchange step. In addition, impregnating SSC reduces the activation energy for oxygen reduction from 1.14 to 0.70 eV, thus resulting in significantly improvement on electrode performance at the reduced temperatures for SOFCs based on proton conductors. Published by Elsevier Ltd. All rights.
Original languageEnglish
Pages (from-to)2685-2691
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number6
DOIs
Publication statusPublished - 14 Feb 2014

Keywords

  • Composite cathode
  • Electrocatalyst impregnation
  • Proton conductor
  • Reduced temperature
  • 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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