Mechanical and electrochemical behavior of novel electrolytes based on partially stabilized zirconia for solid oxide fuel cells


Celik S. , Timurkutluk B., Toros S., Timurkutluk C.

Ceramics International, vol.41, no.7, pp.8785-8790, 2015 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 7
  • Publication Date: 2015
  • Doi Number: 10.1016/j.ceramint.2015.03.104
  • Title of Journal : Ceramics International
  • Page Numbers: pp.8785-8790
  • Keywords: Novel electrolyte design, Solid oxide fuel cell, Tensile test, Yttria stabilized zirconia

Abstract

© 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.In this study, 3 mol% yttria stabilized zirconia (3YSZ) is investigated as a SOFC electrolyte alternative to 8 mol% yttria stabilized zirconia (8YSZ). The mechanical and electrochemical properties of both materials are compared. The mechanical tests indicate that the thickness of 3YSZ can be reduced to half without sacrificing the strength compared to 8YSZ. By reducing the thickness of 3YSZ from 150 μm to 75 μm, the peak power density is shown to increase by around 80%. The performance is further enhanced by around 22% by designing of novel electrode structure with regular cut-off patterns previously optimized. However, the cell with novel designed 3YSZ electrolyte exhibits 30% lower maximum power density than that of the cell with 150 μm-thick standard 8YSZ electrolyte. Nevertheless, the loss in the performance may be tolerated by decreasing the fabrication cost revealing that 3YSZ electrolyte with cut-off patterns can be employed as SOFC electrolyte alternative to 8YSZ.