A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells

F. Baiutti; F. Chiabrera; Matias Acosta; D. Diercks; D. Parfitt; J. Santiso; Xuejing Wang; A. Cavallaro; A. Morata; H. Wang; A. Chroneos; J. MacManus-Driscoll; A. Tarancon

doi:10.1038/s41467-021-22916-4

A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells

F. Baiutti, F. Chiabrera, Matias Acosta, D. Diercks, D. Parfitt, J. Santiso, Xuejing Wang, A. Cavallaro, A. Morata, H. Wang, A. Chroneos, J. MacManus-Driscoll, A. Tarancon

Faculty of Engineering, Environment & Computing

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Abstract

The implementation of nano-engineered composite oxides opens up the way towards the development of a novel class of functional materials with enhanced electrochemical properties. Here we report on the realization of vertically aligned nanocomposites of lanthanum strontium manganite and doped ceria with straight applicability as functional layers in high-temperature energy conversion devices. By a detailed analysis using complementary state-of-the-art techniques, which include atom-probe tomography combined with oxygen isotopic exchange, we assess the local structural and electrochemical functionalities and we allow direct observation of local fast oxygen diffusion pathways. The resulting ordered mesostructure, which is characterized by a coherent, dense array of vertical interfaces, shows high electrochemically activity and suppressed dopant segregation. The latter is ascribed to spontaneous cationic intermixing enabling lattice stabilization, according to density functional theory calculations. This work highlights the relevance of local disorder and long-range arrangements for functional oxides nano-engineering and introduces an advanced method for the local analysis of mass transport phenomena.

Original language	English
Article number	2660
Number of pages	11
Journal	Nature Communications
Volume	12
Issue number	1
DOIs	https://doi.org/10.1038/s41467-021-22916-4
Publication status	Published - 11 May 2021

Bibliographical note

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party
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ASJC Scopus subject areas

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)

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A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells. / Baiutti, F.; Chiabrera, F.; Acosta, Matias; Diercks, D.; Parfitt, D.; Santiso, J.; Wang, Xuejing; Cavallaro, A.; Morata, A.; Wang, H.; Chroneos, A.; MacManus-Driscoll, J.; Tarancon, A.

In: Nature Communications, Vol. 12, No. 1, 2660, 11.05.2021.

Research output: Contribution to journal › Article › peer-review

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A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells

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