In situ characterization of the formation of a mixed conducting phase on the surface of yttria-stabilized zirconia near Pt electrodes
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Sandia National Laboratories (SNL-CA), Livermore, CA (United States). Materials Physics Dept.
The electrochemical reactions of solid oxide fuel cells occur in the region where gas-phase species, electrode, and electrolyte coincide. When the electrode is an ionic insulator and the electrolyte is an electronic insulator, this triple phase boundary is assumed to have atomic dimensions. For this study, we use photoemission electron microscopy to show that the reduced surface of the electrolyte yttria-stabilized zirconia (YSZ) has a sharp electronic metal-insulator boundary near Pt negative electrodes. The electronic conductivity of the reduced YSZ allows for oxygen reduction, allowing the reduced YSZ to behave as an extended triple phase boundary. This extended triple phase boundary can be many microns in size, depending on oxygen pressure, temperature, applied voltage, and time.
- Research Organization:
- Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1426893
- Report Number(s):
- SAND2014--17609J; 537445
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 12 Vol. 92; ISSN 1098-0121; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
Similar Records
The role of 8 mol % yttria stabilized zirconia in the improvement of electrochemical performance of lanthanum manganite composite electrodes
Conditioning effects on La1-xSrxMnO3-Yttria stabilized Zirconia electrodes for thin-film solid oxide fuel cells
Reactive sputter deposition of yttria-stabilized zirconia
Journal Article
·
Mon Jun 01 00:00:00 EDT 1998
· Journal of the Electrochemical Society
·
OSTI ID:653348
Conditioning effects on La1-xSrxMnO3-Yttria stabilized Zirconia electrodes for thin-film solid oxide fuel cells
Technical Report
·
Thu Dec 05 23:00:00 EST 2002
·
OSTI ID:810538
Reactive sputter deposition of yttria-stabilized zirconia
Conference
·
Mon May 01 00:00:00 EDT 1995
·
OSTI ID:95300