2026-04-17T05:44:10Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4610372024-11-04T03:37:38Zcom_2072_98col_2072_378192

00925njm 22002777a 4500 dc Baiutti, Federico author Chiabrera, Francesco Maria author Acosta, Matias author Diercks, David author Parfitt, D. author Santiso, José author Wang, X. author Cavallaro, Andrea author Morata, Alex author Wang, Haiyan author Chroneos, A. author Driscoll, Judith author Tarancón Rubio, Albert author 2021 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. http://hdl.handle.net/2072/461037 Fuel cells Nanoscale materials A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells