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Liang D, Chen Y, Deng C, de Pablo JJ. Charge Scaling in Classical Force Fields for Lithium Ions in Polymers. ACS Macro Lett 2024:1258-1264. [PMID: 39269737 DOI: 10.1021/acsmacrolett.4c00368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2024]
Abstract
Polymer electrolytes are of interest for applications in energy storage. Molecular simulations of ion transport in polymer electrolytes have been widely used to study the conductivity in these materials. Such simulations have generally relied on classical force fields. A peculiar feature of such force fields has been that in the particular case of lithium ions (Li+), their charge must be scaled down by approximately 20% to achieve agreement with experimental measurements of ion diffusivity. In this work, we present first-principles calculations that serve to justify the charge-scaling factor and van der Waals interaction parameters for Li+ diffusion in poly(ethylene glycol) (PEO) with bistriflimide (TFSI-) counterions. Our results indicate that a scaling factor of 0.79 provides good agreement with DFT calculations over a relatively wide range of Li+ concentrations and temperatures, consistent with past reports where that factor was adjusted by trial and error. We also show that such a scaling factor leads to diffusivities that are in quantitative agreement with experimental measurements.
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Affiliation(s)
- Dongyue Liang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Yuxi Chen
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Chuting Deng
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Juan J de Pablo
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
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Fortuin BA, Otegi J, López Del Amo JM, Peña SR, Meabe L, Manzano H, Martínez-Ibañez M, Carrasco J. Synergistic theoretical and experimental study on the ion dynamics of bis(trifluoromethanesulfonyl)imide-based alkali metal salts for solid polymer electrolytes. Phys Chem Chem Phys 2023; 25:25038-25054. [PMID: 37698851 DOI: 10.1039/d3cp02989a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Model validation of a well-known class of solid polymer electrolyte (SPE) is utilized to predict the ionic structure and ion dynamics of alternative alkali metal ions, leading to advancements in Na-, K-, and Cs-based SPEs for solid-state alkali metal batteries. A comprehensive study based on molecular dynamics (MD) is conducted to simulate ion coordination and the ion transport properties of poly(ethylene oxide) (PEO) with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt across various LiTFSI concentrations. Through validation of the MD simulation results with experimental techniques, we gain a deeper understanding of the ionic structure and dynamics in the PEO/LiTFSI system. This computational approach is then extended to predict ion coordination and transport properties of alternative alkali metal ions. The ionic structure in PEO/LiTFSI is significantly influenced by the LiTFSI concentration, resulting in different lithium-ion transport mechanisms for highly concentrated or diluted systems. Substituting lithium with sodium, potassium, and cesium reveals a weaker cation-PEO coordination for the larger cesium-ion. However, sodium-ion based SPEs exhibit the highest cation transport number, indicating the crucial interplay between salt dissociation and cation-PEO coordination for achieving optimal performance in alkali metal SPEs.
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Affiliation(s)
- Brigette Althea Fortuin
- Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.
- Department of Physics, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain.
- ALISTORE-European Research Institute, CNRS FR 3104, Hub de l'Energie, Rue Baudelocque, 80039 Amiens Cedex, France
| | - Jon Otegi
- Department of Physics, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain.
| | - Juan Miguel López Del Amo
- Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.
| | - Sergio Rodriguez Peña
- Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.
- Department of Physics, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain.
| | - Leire Meabe
- Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.
| | - Hegoi Manzano
- Department of Physics, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain.
| | - María Martínez-Ibañez
- Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.
| | - Javier Carrasco
- Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
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Leong KW, Pan W, Yi X, Luo S, Zhao X, Zhang Y, Wang Y, Mao J, Chen Y, Xuan J, Wang H, Leung DY. Next-generation magnesium-ion batteries: The quasi-solid-state approach to multivalent metal ion storage. SCIENCE ADVANCES 2023; 9:eadh1181. [PMID: 37556543 PMCID: PMC10411913 DOI: 10.1126/sciadv.adh1181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 07/06/2023] [Indexed: 08/11/2023]
Abstract
Mg-ion batteries offer a safe, low-cost, and high-energy density alternative to current Li-ion batteries. However, nonaqueous Mg-ion batteries struggle with poor ionic conductivity, while aqueous batteries face a narrow electrochemical window. Our group previously developed a water-in-salt battery with an operating voltage above 2 V yet still lower than its nonaqueous counterpart because of the dominance of proton over Mg-ion insertion in the cathode. We designed a quasi-solid-state magnesium-ion battery (QSMB) that confines the hydrogen bond network for true multivalent metal ion storage. The QSMB demonstrates an energy density of 264 W·hour kg-1, nearly five times higher than aqueous Mg-ion batteries and a voltage plateau (2.6 to 2.0 V), outperforming other Mg-ion batteries. In addition, it retains 90% of its capacity after 900 cycles at subzero temperatures (-22°C). The QSMB leverages the advantages of aqueous and nonaqueous systems, offering an innovative approach to designing high-performing Mg-ion batteries and other multivalent metal ion batteries.
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Affiliation(s)
- Kee Wah Leong
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Wending Pan
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Xiaoping Yi
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Shijing Luo
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Xiaolong Zhao
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Yingguang Zhang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Yifei Wang
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 510006, China
| | - Jianjun Mao
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Yue Chen
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Jin Xuan
- Department of Chemical and Process Engineering, University of Surrey, Surrey GU2 7XH, UK
| | - Huizhi Wang
- Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Dennis Y. C. Leung
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
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Fortuin B, Meabe L, Peña SR, Zhang Y, Qiao L, Etxabe J, Garcia L, Manzano H, Armand M, Martínez-Ibañez M, Carrasco J. Molecular-Level Insight into Charge Carrier Transport and Speciation in Solid Polymer Electrolytes by Chemically Tuning Both Polymer and Lithium Salt. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:1955-1964. [PMID: 36761231 PMCID: PMC9900585 DOI: 10.1021/acs.jpcc.2c07032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 01/09/2023] [Indexed: 06/18/2023]
Abstract
The advent of Li-metal batteries has seen progress toward studies focused on the chemical modification of solid polymer electrolytes, involving tuning either polymer or Li salt properties to enhance the overall cell performance. This study encompasses chemically modifying simultaneously both polymer matrix and lithium salt by assessing ion coordination environments, ion transport mechanisms, and molecular speciation. First, commercially used lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt is taken as a reference, where F atoms become partially substituted by one or two H atoms in the -CF3 moieties of LiTFSI. These substitutions lead to the formation of lithium(difluoromethanesulfonyl)(trifluoromethanesulfonyl)imide (LiDFTFSI) and lithium bis(difluoromethanesulfonyl)imide (LiDFSI) salts. Both lithium salts promote anion immobilization and increase the lithium transference number. Second, we show that exchanging archetypal poly(ethylene oxide) (PEO) with poly(ε-caprolactone) (PCL) significantly changes charge carrier speciation. Studying the ionic structures of these polymer/Li salt combinations (LiTFSI, LiDFTFSI or LiDFSI with PEO or PCL) by combining molecular dynamics simulations and a range of experimental techniques, we provide atomistic insights to understand the solvation structure and synergistic effects that impact macroscopic properties, such as Li+ conductivity and transference number.
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Affiliation(s)
- Brigette
A. Fortuin
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
- Department
of Physics, University of the Basque Country
(UPV/EHU), 48940Leioa, Spain
| | - Leire Meabe
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
| | - Sergio Rodriguez Peña
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
- Department
of Physics, University of the Basque Country
(UPV/EHU), 48940Leioa, Spain
| | - Yan Zhang
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
| | - Lixin Qiao
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
| | - Julen Etxabe
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
| | - Lorena Garcia
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
| | - Hegoi Manzano
- Department
of Physics, University of the Basque Country
(UPV/EHU), 48940Leioa, Spain
| | - Michel Armand
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
| | - María Martínez-Ibañez
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
| | - Javier Carrasco
- Centre
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein
48, 01510Vitoria-Gasteiz, Spain
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Volkov VI, Yarmolenko OV, Chernyak AV, Slesarenko NA, Avilova IA, Baymuratova GR, Yudina AV. Polymer Electrolytes for Lithium-Ion Batteries Studied by NMR Techniques. MEMBRANES 2022; 12:membranes12040416. [PMID: 35448386 PMCID: PMC9028971 DOI: 10.3390/membranes12040416] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 03/30/2022] [Indexed: 11/16/2022]
Abstract
This review is devoted to different types of novel polymer electrolytes for lithium power sources developed during the last decade. In the first part, the compositions and conductivity of various polymer electrolytes are considered. The second part contains NMR applications to the ion transport mechanism. Polymer electrolytes prevail over liquid electrolytes because of their exploitation safety and wider working temperature ranges. The gel electrolytes are mainly attractive. The systems based on polyethylene oxide, poly(vinylidene fluoride-co-hexafluoropropylene), poly(ethylene glycol) diacrylate, etc., modified by nanoparticle (TiO2, SiO2, etc.) additives and ionic liquids are considered in detail. NMR techniques such as high-resolution NMR, solid-state NMR, magic angle spinning (MAS) NMR, NMR relaxation, and pulsed-field gradient NMR applications are discussed. 1H, 7Li, and 19F NMR methods applied to polymer electrolytes are considered. Primary attention is given to the revelation of the ion transport mechanism. A nanochannel structure, compositions of ion complexes, and mobilities of cations and anions studied by NMR, quantum-chemical, and ionic conductivity methods are discussed.
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Affiliation(s)
- Vitaly I. Volkov
- Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka, Russia; (O.V.Y.); (A.V.C.); (N.A.S.); (I.A.A.); (G.R.B.); (A.V.Y.)
- Scientific Center in Chernogolovka RAS, 142432 Chernogolovka, Russia
- Correspondence: or
| | - Olga V. Yarmolenko
- Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka, Russia; (O.V.Y.); (A.V.C.); (N.A.S.); (I.A.A.); (G.R.B.); (A.V.Y.)
| | - Alexander V. Chernyak
- Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka, Russia; (O.V.Y.); (A.V.C.); (N.A.S.); (I.A.A.); (G.R.B.); (A.V.Y.)
- Scientific Center in Chernogolovka RAS, 142432 Chernogolovka, Russia
| | - Nikita A. Slesarenko
- Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka, Russia; (O.V.Y.); (A.V.C.); (N.A.S.); (I.A.A.); (G.R.B.); (A.V.Y.)
| | - Irina A. Avilova
- Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka, Russia; (O.V.Y.); (A.V.C.); (N.A.S.); (I.A.A.); (G.R.B.); (A.V.Y.)
| | - Guzaliya R. Baymuratova
- Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka, Russia; (O.V.Y.); (A.V.C.); (N.A.S.); (I.A.A.); (G.R.B.); (A.V.Y.)
| | - Alena V. Yudina
- Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka, Russia; (O.V.Y.); (A.V.C.); (N.A.S.); (I.A.A.); (G.R.B.); (A.V.Y.)
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