Journal
JOURNAL OF POWER SOURCES
Volume 302, Issue -, Pages 98-106Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.10.026
Keywords
Electronic conductivity; Transient technique; Oxygen permeation; YSZ
Funding
- US Department of Energy [DE-FG02-06ER46086]
- US Department of Energy, EFRC as a flow-through from the University of South Carolina [SC0001061]
Ask authors/readers for more resources
A new oxygen permeation technique is developed to measure the electronic conductivity of yttriastabilized zirconia (YSZ). The permeation cell is a YSZ disc with an embedded Pt probe and a cavity at the center. Two porous platinum electrodes are applied on the disc surfaces. By applying a small DC bias (0.03 V) across one surface electrode and the embedded probe, oxygen is pumped into the YSZ disc and stored in the cavity. In steady state, a stable Nernst potential is developed between the cavity and the outer surfaces. The Nernst voltage is very close to the applied voltage since YSZ is essentially an ionic conductor. When the DC bias is removed, oxygen permeates out of the cavity leading to a decay of the Nernst potential. Electronic conductivity of YSZ corresponding to the ambient oxygen pressure (similar to 0.21 atm) is determined by analyzing the time dependence of the decay of Nernst potential. The measured electronic conductivity is in good agreement with values reported in the literature. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available