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Title: Ionic conductivity of YSZ/CZO multilayers with variable lattice mismatch

Abstract

Heterostructured multilayers have been controversially reported to alter the oxygen ion conductivity of solid electrolytes by inducing interfacial mechanical strain. Here, we fabricated thin film multilayers composed of 9 mol% Y 2O 3 doped ZrO 2 (YSZ) and Ce 1-xZr xO 2 (CZO) to systematically quantify the effects of tensile strain on the oxygen-ion conduction behavior in YSZ. A significant advantage of using CZO is that its lattice parameter can be continuously varied by adjusting the Ce/Zr atomic ratio, simplifying the strain control over the neighboring YSZ layers. Three different sets of multilayers composed of YSZ with CeO 2, or with Ce 0.70Z r0.30O 2 (CZO30), or with Ce 0.55Zr 0.45O 2 (CZO45) were prepared on Al 2O 3 substrates with interfacial lattice mismatch of +5.2%, +3.7%, and +2.9%, respectively. When decreasing the individual layer thicknesses from 35 nm to 5 nm, all of the multilayers exhibited little change of the conductivity, with values consistently near that of bulk YSZ. X-ray diffraction results indicate that the interfacial strains were largely relaxed. In conclusion, suggestions that multilayers are unable to effect ionic conductivity changes must therefore consider the difficulties in obtaining lattice mismatch-based elastic strain, even at <3% mismatch.

Authors:
 [1];  [2]
  1. Univ. of Delaware, Newark, DE (United States). Dept. of Mechanical Engineering
  2. Univ. of Delaware, Newark, DE (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1457392
Grant/Contract Number:  
SC0005403
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 3; Journal Issue: 5; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; mechanical strain; multilayer; YSZ; ceria-zirconia; ion conductivity

Citation Formats

Shen, Weida, and Hertz, Joshua L. Ionic conductivity of YSZ/CZO multilayers with variable lattice mismatch. United States: N. p., 2015. Web. doi:10.1039/c4ta03892d.
Shen, Weida, & Hertz, Joshua L. Ionic conductivity of YSZ/CZO multilayers with variable lattice mismatch. United States. doi:10.1039/c4ta03892d.
Shen, Weida, and Hertz, Joshua L. Sat . "Ionic conductivity of YSZ/CZO multilayers with variable lattice mismatch". United States. doi:10.1039/c4ta03892d. https://www.osti.gov/servlets/purl/1457392.
@article{osti_1457392,
title = {Ionic conductivity of YSZ/CZO multilayers with variable lattice mismatch},
author = {Shen, Weida and Hertz, Joshua L.},
abstractNote = {Heterostructured multilayers have been controversially reported to alter the oxygen ion conductivity of solid electrolytes by inducing interfacial mechanical strain. Here, we fabricated thin film multilayers composed of 9 mol% Y2O3 doped ZrO2 (YSZ) and Ce1-xZrxO2 (CZO) to systematically quantify the effects of tensile strain on the oxygen-ion conduction behavior in YSZ. A significant advantage of using CZO is that its lattice parameter can be continuously varied by adjusting the Ce/Zr atomic ratio, simplifying the strain control over the neighboring YSZ layers. Three different sets of multilayers composed of YSZ with CeO2, or with Ce0.70Zr0.30O2 (CZO30), or with Ce0.55Zr0.45O2 (CZO45) were prepared on Al2O3 substrates with interfacial lattice mismatch of +5.2%, +3.7%, and +2.9%, respectively. When decreasing the individual layer thicknesses from 35 nm to 5 nm, all of the multilayers exhibited little change of the conductivity, with values consistently near that of bulk YSZ. X-ray diffraction results indicate that the interfacial strains were largely relaxed. In conclusion, suggestions that multilayers are unable to effect ionic conductivity changes must therefore consider the difficulties in obtaining lattice mismatch-based elastic strain, even at <3% mismatch.},
doi = {10.1039/c4ta03892d},
journal = {Journal of Materials Chemistry. A},
number = 5,
volume = 3,
place = {United States},
year = {Sat Dec 05 00:00:00 EST 2015},
month = {Sat Dec 05 00:00:00 EST 2015}
}

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Cited by: 11 works
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Works referenced in this record:

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