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Bonometti L, Daga LE, Rocca R, Marana NL, Casassa S, D’Amore M, Laasonen K, Petit M, Silveri F, Sgroi MF, Ferrari AM, Maschio L. Path ahead: Tackling the Challenge of Computationally Estimating Lithium Diffusion in Cathode Materials. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:11979-11988. [PMID: 39081560 PMCID: PMC11285369 DOI: 10.1021/acs.jpcc.4c00960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 05/09/2024] [Accepted: 05/31/2024] [Indexed: 08/02/2024]
Abstract
In the roadmap toward designing new and improved materials for Lithium ion batteries, the ability to estimate the diffusion coefficient of Li atoms in electrodes, and eventually solid-state electrolytes, is key. Nevertheless, as of today, accurate prediction through computational tools remains challenging. Its experimental measurement does not appear to be much easier. In this work, we devise a computational protocol for the determination of the Li-migration energy barrier and diffusion coefficient, focusing on a common cathode material such as LiNiO2, which represents a prototype of the widely adopted NMC (LiNi1-x-y Mn x Co y O2) class of materials. Different methodologies are exploited, combining ab initio metadynamics, path sampling, and density functional theory. Furthermore, we propose a novel, fast, and simple 1D approximation for the estimation of the effective frequency. The outlined computational protocol aims to be generally applicable to Lithium diffusion in other materials and components for batteries, including anodes and solid electrolytes.
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Affiliation(s)
- Laura Bonometti
- Dipartimento
di Chimica and NIS Centre, Università
di Torino, Via P. Giuria
5, Torino 10125, Italy
| | - Loredana E. Daga
- Dipartimento
di Chimica, Università di Torino, Via P. Giuria 5, Torino 10125, Italy
| | - Riccardo Rocca
- Dipartimento
di Chimica, Università di Torino, Via P. Giuria 5, Torino 10125, Italy
- FIAT
Research Center (CRF), Strada Torino 50, Orbassano, Torino 10043, Italy
| | - Naiara L. Marana
- Dipartimento
di Chimica, Università di Torino, Via P. Giuria 5, Torino 10125, Italy
| | - Silvia Casassa
- Dipartimento
di Chimica, Università di Torino, Via P. Giuria 5, Torino 10125, Italy
| | - Maddalena D’Amore
- Dipartimento
di Chimica, Università di Torino, Via P. Giuria 5, Torino 10125, Italy
| | - Kari Laasonen
- Department
of Chemistry, Aalto University, Espoo 00076, Finland
| | - Martin Petit
- IFP
Energies Nouvelles, Rond-point
de l’échangeur de Solaize—BP3, Solaize 69360, France
| | - Fabrizio Silveri
- Gemmate
Technologies SRL, Via
Reano 31, Buttigliera Alta 10090, Italy
| | - Mauro F. Sgroi
- Dipartimento
di Chimica and NIS Centre, Università
di Torino, Via P. Giuria
5, Torino 10125, Italy
| | - Anna M. Ferrari
- Dipartimento
di Chimica and NIS Centre, Università
di Torino, Via P. Giuria
5, Torino 10125, Italy
| | - Lorenzo Maschio
- Dipartimento
di Chimica and NIS Centre, Università
di Torino, Via P. Giuria
5, Torino 10125, Italy
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NAi/Li Antisite Defects in the Li1.2Ni0.2Mn0.6O2 Li-Rich Layered Oxide: A DFT Study. CRYSTALS 2022. [DOI: 10.3390/cryst12050723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Li-rich layered oxide (LRLO) materials are promising positive-electrode materials for Li-ion batteries. Antisite defects, especially nickel and lithium ions, occur spontaneously in many LRLOs, but their impact on the functional properties in batteries is controversial. Here, we illustrate the analysis of the formation of Li/Ni antisite defects in the layered lattice of the Co-free LRLO Li1.2Mn0.6Ni0.2O2 compound through a combination of density functional theory calculations performed on fully disordered supercells and a thermodynamic model. Our goal was to evaluate the concentration of antisite defects in the trigonal lattice as a function of temperature and shed light on the native disorder in LRLO and how synthesis protocols can promote the antisite defect formation.
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Replacement of Cobalt in Lithium-Rich Layered Oxides by n-Doping: A DFT Study. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112210545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The replacement of cobalt in the lattice of lithium-rich layered oxides (LRLO) is mandatory to improve their environmental benignity and reduce costs. In this study, we analyze the impact of the cobalt removal from the trigonal LRLO lattice on the structural, thermodynamic, and electronic properties of this material through density functional theory calculations. To mimic disorder in the transition metal layers, we exploited the special quasi-random structure approach on selected supercells. The cobalt removal was modeled by the simultaneous substitution with Mn/Ni, thus leading to a p-doping in the lattice. Our results show that cobalt removal induces (a) larger cell volumes, originating from expanded distances among stacked planes; (b) a parallel increase of the layer buckling; (c) an increase of the electronic disorder and of the concentration of Jahn–Teller defects; and (d) an increase of the thermodynamic stability of the phase. Overall p-doping appears as a balanced strategy to remove cobalt from LRLO without massively deteriorating the structural integrity and the electronic properties of LRLO.
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Kim D, Kim HT, Song SA, Kim K, Lim SN, Woo JY, Han H. Effect of LiCoO2-Coated Cathode on Performance of Molten Carbonate Fuel Cell. J ELECTROCHEM SCI TE 2021. [DOI: 10.33961/jecst.2021.00668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
LiNi1−x−yMnxCoyO2 materials are a typical class of layered cathode materials with excellent electrochemical performance in lithium-ion batteries. Molecular dynamics simulations are performed for LiNi1−x−yMnxCoyO2 materials with different transition metal ratios. The Li/Ni exchange ratio, ratio of anti-site Ni2+ to total Ni2+, and diffusion coefficient of Li ions in these materials are calculated. The results show that the Li-ion diffusion coefficient strongly depends on the ratio of anti-site Ni2+ to total Ni2+ because their variation tendencies are similar. In addition, the local coordination structure of the Li/Ni anti-site is analyzed.
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Uekawa N. Synthesis of Defect and Valence State Tuned Metal Oxide Nanoparticles with Colloid Chemical Solution Process: Control of Optical and Electrical Characteristics. CHEM LETT 2021. [DOI: 10.1246/cl.200638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Naofumi Uekawa
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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