Effects of electrolyte pattern on mechanical and electrochemical properties of solid oxide fuel cells


TİMURKUTLUK B., Celik S., Toros S., Timurkutluk C., Mat M. D. , Kaplan Y.

CERAMICS INTERNATIONAL, vol.38, no.7, pp.5651-5659, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 7
  • Publication Date: 2012
  • Doi Number: 10.1016/j.ceramint.2012.04.008
  • Title of Journal : CERAMICS INTERNATIONAL
  • Page Numbers: pp.5651-5659
  • Keywords: Solid oxide fuel cell, Scandia alumina stabilized zirconia, Novel electrolyte design, Bending strength, YTTRIA-STABILIZED ZIRCONIA, GADOLINIUM-DOPED CERIA, INTERMEDIATE-TEMPERATURE, ELECTRICAL-CONDUCTIVITY, ELECTROPHORETIC DEPOSITION, IONIC-CONDUCTIVITY, THIN-FILMS, ANODE, SOFC, PERFORMANCE

Abstract

In order to enhance the electrochemical performance and reduce the operation temperature of a conventional electrolyte supported solid oxide fuel cell (SOFC), a three layered electrolyte with various geometry is designed and fabricated. Novel three layered electrolytes comprise a dense and thin scandia alumina stabilized zirconia (ScAlSZ) electrolyte layer sandwiched between two hallow ScAlSZ electrolyte layers each having the same thickness as the support but machined into a filter like architecture in the active region with circular, rectangular and triangular cut off patterns. The percent of thin electrolyte layer in the active region is kept constant as 30% for all designs in order to investigate the effect of pattern geometry on the mechanical properties and the performance of the electrolytes. Single cells based on novel electrolytes are manufactured and electrochemical properties are evaluated. A standard electrolyte and electrolyte supported cell are also fabricated as a base case for comparison. Although the electrolyte having triangular patterns has the highest peak power at all operation temperatures considered, it exhibits the lowest flexural strength. (c) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.