A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells
Baiutti, Federico (Institut de Recerca en Energia de Catalunya)
Chiabrera, Francesco Maria (Institut de Recerca en Energia de Catalunya)
Acosta, Matias (University of Cambridge. Department of Materials Science and Metallurgy)
Diercks, David (Colorado School of Mines. Department of Metallurgical and Materials Engineering)
Parfitt, D. (Coventry University. Faculty of Engineering, Environment and Computing)
Santiso, José (Institut Català de Nanociència i Nanotecnologia)
Wang, X. (Purdue University. School of Materials Engineering)
Cavallaro, Andrea (Imperial College London. Department of Materials)
Morata, Alex (Institut de Recerca en Energia de Catalunya)
Wang, Haiyan (Purdue University. School of Materials Engineering)
Chroneos, A. (Coventry University. Faculty of Engineering, Environment and Computing)
Driscoll, Judith (University of Cambridge. Department of Materials Science and Metallurgy)
Tarancón Rubio, Albert (Institució Catalana de Recerca i Estudis Avançats) [...] Mostra tots els 13 autors

Data:	2021
Resum:	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. Electrode functional layers for solid oxide cells require a combination of high reactivity and thermal stability. Here, the authors present a self-assembled vertically aligned nanocomposites of lanthanum strontium manganite and doped ceria as functional layers for high temperature applications.
Ajuts:	European Commission 101017709 European Commission 824072 European Commission 779444 European Commission 681146 Ministerio de Economía y Competitividad SEV-2017-0706
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Fuel cells ; Nanoscale materials
Publicat a:	Nature communications, Vol. 12 (May 2021) , art. 2660, ISSN 2041-1723

DOI: 10.1038/s41467-021-22916-4
PMID: 33976209

11 p, 2.8 MB

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