Affordable Access

Publisher Website

Effect of Sr on Sm-doped ceria electrolyte

Authors
Journal
International Journal of Hydrogen Energy
0360-3199
Publisher
Elsevier
Publication Date
Volume
36
Issue
8
Identifiers
DOI: 10.1016/j.ijhydene.2011.01.042
Keywords
  • Fuel Cells
  • Sintering
  • Crystal Structure
  • Ionic Conductivity
  • Thermal Expansion
  • Flexural Strength

Abstract

Abstract The effect of Sr addition (0–10 mol%) on the densification, crystal structure, ionic conductivity, thermal expansion, and flexural strength of Ce 0.8Sm 0.2O 1.9 (SDC) was studied. Sr addition promotes densification and reduces sintering temperature by ∼100 °C. X-ray diffraction analysis showed that all the samples exhibit a fluorite structure. Impedance spectroscopy measurements indicated that SDC incorporated with an appropriate ratio of Sr (4–10 mol%) has higher ionic conductivity and lower activation energy compared with those of SDC. As the added amount of Sr increases by up to 6 mol% (0.94SDC-0.06Sr), the sample attains the highest ionic conductivity, about 30% higher than that of SDC at 700 °C. Moreover, flexural strength increases with Sr content, with the addition of 10 mol% Sr increasing the flexural strength of SDC from 97 to 160 MPa. In addition, thermal expansion is linear for all the samples. The addition of Sr does not appreciably change thermal expansion coefficient.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

The effect of Sr on the properties of Y-doped ceri...

on Journal of Alloys and Compound... Jan 01, 2009

Effect of Dy on the properties of Sm-doped ceria e...

on Journal of Alloys and Compound... Jan 01, 2011

Effect of Dy on the properties of Sm-doped ceria e...

on Journal of Alloys and Compound...
More articles like this..