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Title: Electrochemical Studies on Na-β”-Alumina + Yttria-Stabilized Zirconia (YSZ) Composite Mixed Na + -Ion-O 2− -Ion Conductors

Abstract

Composite Na-β"-alumina + yttria-stabilized zirconia (YSZ) samples were fabricated by vapor phase conversion of sintered α-alumina + YSZ two-phase samples. In the converted samples Na-β"-alumina and YSZ were both contiguous. The samples thus are mixed Na+-ion-O2-ion conductors. Discs were tested separately under an oxygen chemical potential differential (H2-H2O-N2 gas mixture on one side and air on the other – fuel cell mode) and under a sodium chemical potential differential (Na-β-alumina + Na-β"-alumina on one side and α-alumina + Na-β-alumina on the other side). In both cases finite open circuit voltages were measured. In testing in fuel cell mode, the initially observed open circuit voltage was lower than expected for a single phase YSZ membrane, which was attributed to the transient flow of Na+ ions. After prolonged testing, the surface exposed to hydrogen containing gas mixture degraded forming a thin layer of α-alumina. The ionic conductivity of the samples was measured using both AC and DC methods.

Authors:
; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1562761
Alternate Identifier(s):
OSTI ID: 1609485
Grant/Contract Number:  
FG02-03ER46086
Resource Type:
Published Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Name: Journal of the Electrochemical Society Journal Volume: 166 Journal Issue: 10; Journal ID: ISSN 0013-4651
Publisher:
IOP Publishing - The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Electrochemistry; Materials Science

Citation Formats

Ghadbeigi, Leila, Sparks, Taylor D., and Virkar, Anil V. Electrochemical Studies on Na-β”-Alumina + Yttria-Stabilized Zirconia (YSZ) Composite Mixed Na + -Ion-O 2− -Ion Conductors. United States: N. p., 2019. Web. doi:10.1149/2.0161912jes.
Ghadbeigi, Leila, Sparks, Taylor D., & Virkar, Anil V. Electrochemical Studies on Na-β”-Alumina + Yttria-Stabilized Zirconia (YSZ) Composite Mixed Na + -Ion-O 2− -Ion Conductors. United States. https://doi.org/10.1149/2.0161912jes
Ghadbeigi, Leila, Sparks, Taylor D., and Virkar, Anil V. Fri . "Electrochemical Studies on Na-β”-Alumina + Yttria-Stabilized Zirconia (YSZ) Composite Mixed Na + -Ion-O 2− -Ion Conductors". United States. https://doi.org/10.1149/2.0161912jes.
@article{osti_1562761,
title = {Electrochemical Studies on Na-β”-Alumina + Yttria-Stabilized Zirconia (YSZ) Composite Mixed Na + -Ion-O 2− -Ion Conductors},
author = {Ghadbeigi, Leila and Sparks, Taylor D. and Virkar, Anil V.},
abstractNote = {Composite Na-β"-alumina + yttria-stabilized zirconia (YSZ) samples were fabricated by vapor phase conversion of sintered α-alumina + YSZ two-phase samples. In the converted samples Na-β"-alumina and YSZ were both contiguous. The samples thus are mixed Na+-ion-O2-ion conductors. Discs were tested separately under an oxygen chemical potential differential (H2-H2O-N2 gas mixture on one side and air on the other – fuel cell mode) and under a sodium chemical potential differential (Na-β-alumina + Na-β"-alumina on one side and α-alumina + Na-β-alumina on the other side). In both cases finite open circuit voltages were measured. In testing in fuel cell mode, the initially observed open circuit voltage was lower than expected for a single phase YSZ membrane, which was attributed to the transient flow of Na+ ions. After prolonged testing, the surface exposed to hydrogen containing gas mixture degraded forming a thin layer of α-alumina. The ionic conductivity of the samples was measured using both AC and DC methods.},
doi = {10.1149/2.0161912jes},
journal = {Journal of the Electrochemical Society},
number = 10,
volume = 166,
place = {United States},
year = {2019},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1149/2.0161912jes

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Works referenced in this record:

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