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Binninger T, Saraç D, Marsh L, Picard T, Doublet ML, Raynaud C. AMOEBA Polarizable Force Field for Molecular Dynamics Simulations of Glyme Solvents. J Chem Theory Comput 2023; 19:1023-1034. [PMID: 36692444 DOI: 10.1021/acs.jctc.2c00926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Classical molecular dynamics (MD) simulations of electrolyte systems are important to gain insight into the atom-scale properties that determine the battery-relevant performance. The recent Tinker-HP software release enables efficient and accurate MD simulations with the AMOEBA polarizable force field. In this work, we developed a procedure to construct a universal AMOEBA model for the solvent family of glymes (glycol methyl ethers), which involves a refinement scheme for valence parameters by fitting the AMOEBA-derived atomic forces to those computed at the DFT level. The refined AMOEBA model provides a good description of both local and nonlocal properties in terms of the spectroscopic response of glyme molecules, as well as the liquid glyme density and dielectric constant. In addition, the complexation energies of alkali and alkaline-earth metal cations with tetraglyme molecules obtained from AMOEBA calculations are in good agreement with DFT results, demonstrating the suitability of the developed AMOEBA model for an accurate simulation of glyme-based battery electrolytes. We also expect the procedure to be transferable to the development of AMOEBA models for other battery electrolyte systems.
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Affiliation(s)
- Tobias Binninger
- ICGM, Université de Montpellier, CNRS, ENSCM, 34095Montpellier, France
| | - Defne Saraç
- ICGM, Université de Montpellier, CNRS, ENSCM, 34095Montpellier, France.,Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS3459, Hub de l'Energie, 80039Amiens, France
| | - Liam Marsh
- ICGM, Université de Montpellier, CNRS, ENSCM, 34095Montpellier, France
| | - Tanguy Picard
- LEPMI, Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, Grenoble INP, 38000Grenoble, France
| | - Marie-Liesse Doublet
- ICGM, Université de Montpellier, CNRS, ENSCM, 34095Montpellier, France.,Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS3459, Hub de l'Energie, 80039Amiens, France
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Pagot G, Di Noto V, Vezzù K, Barbiellini B, Toso V, Caruso A, Zheng M, Li X, Ferragut R. Quantum view of Li-ion high mobility at carbon-coated cathode interfaces. iScience 2022; 26:105794. [PMID: 36594017 PMCID: PMC9803833 DOI: 10.1016/j.isci.2022.105794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/05/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
Lithium-ion batteries (LIBs) are among the most promising power sources for electric vehicles, portable electronics and smart grids. In LIBs, the cathode is a major bottleneck, with a particular reference to its low electrical conductivity and Li-ion diffusivity. The coating with carbon layers is generally employed to enhance the electrical conductivity and to protect the active material from degradation during operation. Here, we demonstrate that this layer has a primary role in the lithium diffusivity into the cathode nanoparticles. Positron is a useful quantum probe at the electroactive materials/carbon interface to sense the mobility of Li-ion. Broadband electrical spectroscopy demonstrates that only a small number of Li-ions are moving, and that their diffusion strongly depends on the type of carbon additive. Positron annihilation and broadband electrical spectroscopies are crucial complementary tools to investigate the electronic effect of the carbon phase on the cathode performance and Li-ion dynamics in electroactive materials.
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Affiliation(s)
- Gioele Pagot
- Section of Chemistry for the Technology (ChemTech), Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy,Corresponding author
| | - Vito Di Noto
- Section of Chemistry for the Technology (ChemTech), Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy,Corresponding author
| | - Keti Vezzù
- Section of Chemistry for the Technology (ChemTech), Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Bernardo Barbiellini
- Physics Department, School of Engineering Science, LUT-University, 53851 Lappeenranta, Finland,Department of Physics, Northeastern University, Boston, MA 02115, USA
| | - Valerio Toso
- L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy,INFN Milan Unit, Via Celoria 16, 20133 Milano, Italy
| | - Alberto Caruso
- L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Meiying Zheng
- Physics Department, School of Engineering Science, LUT-University, 53851 Lappeenranta, Finland,L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Xin Li
- Physics Department, School of Engineering Science, LUT-University, 53851 Lappeenranta, Finland,L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Rafael Ferragut
- L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy,INFN Milan Unit, Via Celoria 16, 20133 Milano, Italy,Corresponding author
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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.
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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
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