Theoretical analysis of the characteristics of the solid oxide fuel cells with a bi-layer electrolyte

Shuanglin Shen, Liejin Guo, Hongtan Liu

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

From the analytical model derived earlier [17], analytical expressions for the relative thickness ratio rs of a bi-layer electrolyte and the maximum power density of a fuel cell are developed. Using these expressions, together with the other relationships from the analytical model, the characteristics of solid oxide fuel cells (SOFCs) with a bi-layer electrolyte are analyzed and theoretical analysis of the effect of the configuration of a bi-layer electrolyte on the SOFC performance is performed. The results show that the effectiveness of the bi-layer electrolyte depends strongly on its configuration. In the analyses, the variations of open circuit voltage and the maximum power density with the thickness ratio at different total electrolyte thicknesses and different operating temperatures are obtained. Furthermore, by taking into considerations of the oxygen partial pressure at the interface between the two layers of electrolytes, an analytical expression for the critical relative thickness ratio, above which, the electrolyte is stable, is obtained.

Original languageEnglish (US)
Pages (from-to)13084-13090
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number29
DOIs
StatePublished - Sep 30 2013

Keywords

  • Bi-layer electrolyte
  • Interfacial oxygen partial pressure
  • Leakage current
  • Solid oxide fuel cell

ASJC Scopus subject areas

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

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