Unveiling the outstanding oxygen mass transport properties of Mn-rich perovskites in grain boundary-dominated La0.8Sr0.2(Mn1-xCox)(0.85)O-3 +/-delta nanostructures

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Title: Unveiling the outstanding oxygen mass transport properties of Mn-rich perovskites in grain boundary-dominated La0.8Sr0.2(Mn1-xCox)(0.85)O-3 +/-delta nanostructures
Authors: Saranya, AM
Morata, A
Pla, D
Burriel, M
Chiabrera, F
Garbayo, I
Hornes, A
Kilner, JA
Tarancon, A
Item Type: Journal Article
Abstract: Ion transport in solid-state devices is of great interest for current and future energy and information technologies. A superior enhancement of several orders of magnitude of the oxygen diffusivity has been recently reported for grain boundaries in lanthanum–strontium manganites. However, the significance and extent of this unique phenomenon are not yet established. Here, we fabricate a thin film continuous composition map of the La0.8Sr0.2(Mn1–xCox)0.85O3±δ family revealing a substantial enhancement of the grain boundary oxygen mass transport properties for the entire range of compositions. Through isotope-exchange depth profiling coupled with secondary ion mass spectroscopy, we show that this excellent performance is not directly linked to the bulk of the material but to the intrinsic nature of the grain boundary. In particular, the great increase of the oxygen diffusion in Mn-rich compositions unveils an unprecedented catalytic performance in the field of mixed ionic–electronic conductors. These results present grain boundaries engineering as a novel strategy for designing highly performing materials for solid-state ionics-based devices.
Issue Date: 28-Aug-2018
Date of Acceptance: 25-Jul-2018
URI: http://hdl.handle.net/10044/1/64542
DOI: https://dx.doi.org/10.1021/acs.chemmater.8b01771
ISSN: 0897-4756
Publisher: American Chemical Society
Start Page: 5621
End Page: 5629
Journal / Book Title: Chemistry of Materials
Volume: 30
Issue: 16
Copyright Statement: © 2018 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes (https://pubs.acs.org/page/policy/authorchoice_termsofuse.html).
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Chemistry
Materials Science
OXIDE FUEL-CELLS
MIXED CONDUCTING PEROVSKITES
THIN-FILMS
LA1-XSRXMN1-YCOYO3+/-DELTA PEROVSKITES
CRYSTAL-STRUCTURE
LASER-DEPOSITION
SURFACE EXCHANGE
REACTION PATHWAY
ION DIFFUSION
DISLOCATIONS
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Chemistry
Materials Science
OXIDE FUEL-CELLS
MIXED CONDUCTING PEROVSKITES
THIN-FILMS
LA1-XSRXMN1-YCOYO3+/-DELTA PEROVSKITES
CRYSTAL-STRUCTURE
LASER-DEPOSITION
SURFACE EXCHANGE
REACTION PATHWAY
ION DIFFUSION
DISLOCATIONS
03 Chemical Sciences
09 Engineering
Materials
Publication Status: Published
Online Publication Date: 2018-08-01
Appears in Collections:Materials



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