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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1021/acs.chemmater.2c00459
|2 doi
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|a pubmed24n1143.xml
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|a eng
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|a Vezzù, Keti
|e verfasserin
|4 aut
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|a Effect of Relaxations on the Conductivity of La1/2+1/2x Li1/2-1/2x Ti1-x Al x O3 Fast Ion Conductors
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 16.07.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 The Authors. Published by American Chemical Society.
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|a Perovskite-type solid-state electrolytes, Li3x La2/3-x TiO3 (LLTO), are considered among the most promising candidates for the development of all-solid-state batteries based on lithium metal. Their high bulk ionic conductivity can be modulated by substituting part of the atoms hosted in the A- or B-site of the LLTO structure. In this work, we investigate the crystal structure and the long-range charge migration processes characterizing a family of perovskites with the general formula La1/2+1/2x Li1/2-1/2x Ti1-x Al x O3 (0 ≤ x ≤ 0.6), in which the charge balance and the nominal A-site vacancies (n A = 0) are preserved. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) investigations reveal the presence of a very complex nanostructure constituted by a mixture of two different ordered nanoregions of tetragonal P4/mmm and rhombohedral R3̅c symmetries. Broadband electrical spectroscopy studies confirm the presence of different crystalline domains and demonstrate that the structural fluctuations of the BO6 octahedra require to be intra- and intercell coupled, to enable the long-range diffusion of the lithium cation, in a similar way to the segmental mode that takes place in polymer-ion conductors. These hypotheses are corroborated by density functional theory (DFT) calculations and molecular dynamic simulations
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|a Journal Article
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|a García-González, Ester
|e verfasserin
|4 aut
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|a Pagot, Gioele
|e verfasserin
|4 aut
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| 700 |
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|a Urones-Garrote, Esteban
|e verfasserin
|4 aut
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|a Sotomayor, Maria Eugenia
|e verfasserin
|4 aut
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|a Varez, Alejandro
|e verfasserin
|4 aut
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|a Di Noto, Vito
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Chemistry of materials : a publication of the American Chemical Society
|d 1998
|g 34(2022), 12 vom: 28. Juni, Seite 5484-5499
|w (DE-627)NLM098194763
|x 0897-4756
|7 nnns
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| 773 |
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|g volume:34
|g year:2022
|g number:12
|g day:28
|g month:06
|g pages:5484-5499
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|u http://dx.doi.org/10.1021/acs.chemmater.2c00459
|3 Volltext
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