|
1
|
Vezzù K, García-González E, Pagot G, Urones-Garrote E, Sotomayor ME, Varez A, Di Noto V. Effect of Relaxations on the Conductivity of La 1/2+1/2x Li 1/2-1/2x Ti 1-x Al x O 3 Fast Ion Conductors. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:5484-5499. [PMID: 35782208 PMCID: PMC9245440 DOI: 10.1021/acs.chemmater.2c00459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/04/2022] [Indexed: 06/15/2023]
Abstract
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.
Collapse
Affiliation(s)
- Keti Vezzù
- Section
of Chemistry for the Technology (ChemTech), Department of Industrial
Engineering, University of Padova, Via Marzolo 9, I-35131 Padova (PD), Italy
| | - Ester García-González
- Departamento
de Química Inorgánica. Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
| | - Gioele Pagot
- Section
of Chemistry for the Technology (ChemTech), Department of Industrial
Engineering, University of Padova, Via Marzolo 9, I-35131 Padova (PD), Italy
- Centro
Studi di Economia e Tecnica dell’Energia Giorgio Levi Cases, Via Marzolo 9, I-35131 Padova (PD), Italy
| | - Esteban Urones-Garrote
- Centro
Nacional de Microscopia electrónica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
| | - Maria Eugenia Sotomayor
- Materials
Science and Engineering Department, University
Carlos III of Madrid, Av. de la Universidad 30, Leganés, Madrid E-28911, Spain
| | - Alejandro Varez
- Materials
Science and Engineering Department, University
Carlos III of Madrid, Av. de la Universidad 30, Leganés, Madrid E-28911, Spain
| | - Vito Di Noto
- Section
of Chemistry for the Technology (ChemTech), Department of Industrial
Engineering, University of Padova, Via Marzolo 9, I-35131 Padova (PD), Italy
- Centro
Studi di Economia e Tecnica dell’Energia Giorgio Levi Cases, Via Marzolo 9, I-35131 Padova (PD), Italy
| |
Collapse
|
|
2
|
Li Y, Yang H, Ahmadi A, Omari A, Pu H. A thermal resistant and flame retardant separator reinforced by attapulgite for lithium-ion batteries via multilayer coextrusion. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
|
3
|
Haque M, Abdurrokhman I, Idström A, Li Q, Rajaras A, Martinelli A, Evenäs L, Lundgren P, Enoksson P. Exploiting low-grade waste heat to produce electricity through supercapacitor containing carbon electrodes and ionic liquid electrolytes. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139640] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
|
4
|
Importance of structures and interactions in ionic liquid-nanomaterial composite systems as a novel approach for their utilization in safe lithium metal batteries: A review. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116736] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
|
5
|
Positron Annihilation Spectroscopy as a Diagnostic Tool for the Study of LiCoO2 Cathode of Lithium-Ion Batteries. CONDENSED MATTER 2021. [DOI: 10.3390/condmat6030028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Positron annihilation spectroscopy using lifetime and Doppler broadening allows the characterization of the lithiation state in LiCoO2 thin film used in cathode of lithium-ion batteries. The lifetime results reflect positron spillover because of the presence of graphite in between the oxide grains in real cathode Li-ion batteries. This spillover produces an effect in the measured positron parameters which are sensitive to delocalized electrons from lithium atoms as in Compton scattering results. The first component of the positron lifetime corresponds to a bulk-like state and can be used to characterize the state of charge of the cathode while the second component represents a surface state at the grain-graphite interface.
Collapse
|