1
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Molashahi M, Modarress H, Nasernejad B, Amjad-Iranagh S, Ghalami Choobar B. Structural and Transport Properties of Novel High-Transference Number Electrolytes Based on Perfluoropolyether- block-Poly(ethylene oxide) for Application in Lithium-Ion Batteries: A Molecular Dynamics Simulation Study. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Maryam Molashahi
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran15875-4413, Iran
| | - Hamid Modarress
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran15875-4413, Iran
| | - Bahram Nasernejad
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran15875-4413, Iran
| | - Sepideh Amjad-Iranagh
- Department of Materials and Metallurgical Engineering, Amirkabir University of Technology, Tehran15875-4413, Iran
| | - Behnam Ghalami Choobar
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran15875-4413, Iran
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2
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Li J, He R, Yuan H, Fang F, Zhou G, Yang Z. Molecular Insights into the Effect of Asymmetric Anions on Lithium Coordination and Transport Properties in Salt-Doped Poly(ionic liquid) Electrolytes. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00159] [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]
Affiliation(s)
- Jiajia Li
- Institute of Advanced Materials (IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Ruiyao He
- Institute of Advanced Materials (IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Hao Yuan
- Institute of Advanced Materials (IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Fang Fang
- Institute of Advanced Materials (IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Guobing Zhou
- Institute of Advanced Materials (IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Zhen Yang
- Institute of Advanced Materials (IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
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3
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Wettstein A, Diddens D, Heuer A. Controlling Li + transport in ionic liquid electrolytes through salt content and anion asymmetry: a mechanistic understanding gained from molecular dynamics simulations. Phys Chem Chem Phys 2022; 24:6072-6086. [PMID: 35212346 DOI: 10.1039/d1cp04830a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In this work, we report the results from molecular dynamics simulations of lithium salt-ionic liquid electrolytes (ILEs) based either on the symmetric bis[(trifluoromethyl)sulfonyl]imide (TFSI-) anion or its asymmetric analogue 2,2,2-(trifluoromethyl)sulfonyl-N-cyanoamide (TFSAM-). Relating lithium's coordination environment to anion mean residence times and diffusion constants confirms the remarkable transport behaviour of the TFSAM--based ILEs that has been observed in recent experiments: for increased salt doping, the lithium ions must compete for the more attractive cyano over oxygen coordination and a fragmented landscape of solvation geometries emerges, in which lithium appears to be less strongly bound. We present a novel, yet statistically straightforward methodology to quantify the extent to which lithium and its solvation shell are dynamically coupled. By means of a Lithium Coupling Factor (LCF) we demonstrate that the shell anions do not constitute a stable lithium vehicle, which suggests for this electrolyte material the commonly termed "vehicular" lithium transport mechanism could be more aptly pictured as a correlated, flow-like motion of lithium and its neighbourhood. Our analysis elucidates two separate causes why lithium and shell dynamics progressively decouple with higher salt content: on the one hand, an increased sharing of anions between lithium limits the achievable LCF of individual lithium-anion pairs. On the other hand, weaker binding configurations naturally entail a lower dynamic stability of the lithium-anion complex, which is particularly relevant for the TFSAM--containing ILEs.
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Affiliation(s)
- Alina Wettstein
- Institut für physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, D-48149 Münster, Germany.
| | - Diddo Diddens
- Institut für Energie- und Klimaforschung, Ionics in Energy Storage, Helmholtz Institut Münster, Forschungszentrum Jülich, Corrensstraße 46, 48149 Münster, Germany
| | - Andreas Heuer
- Institut für physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, D-48149 Münster, Germany. .,Institut für Energie- und Klimaforschung, Ionics in Energy Storage, Helmholtz Institut Münster, Forschungszentrum Jülich, Corrensstraße 46, 48149 Münster, Germany
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4
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Sundari CDD, Ivansyah AL, Floweri O, Arcana IM, Iskandar F. Insights into the intermolecular interactions and temperature-concentration dependence of transport in ionic liquid-based EMI–TFSI/LiTFSI electrolytes. NEW J CHEM 2022. [DOI: 10.1039/d1nj05489a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT calculations and MD simulations show that the EMI–TFSI/LiTFSI system is stabilized by strong nonbonded attractions, and the lithium-ion conductivity depends on the LiTFSI concentration and system temperature.
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Affiliation(s)
- Citra Deliana Dewi Sundari
- Inorganic and Physical Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
- Department of Chemistry Education, UIN Sunan Gunung Djati Bandung, Bandung 40292, Indonesia
| | - Atthar Luqman Ivansyah
- Master Program in Computational Science, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
- Analytical Chemistry Division, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Octia Floweri
- Research Center for Nanoscience and Nanotechnology (RCNN), Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - I Made Arcana
- Inorganic and Physical Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Ferry Iskandar
- Research Center for Nanoscience and Nanotechnology (RCNN), Institut Teknologi Bandung, Bandung 40132, Indonesia
- Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
- National Center for Sustainable Transportation Technology (NCSTT), Institut Teknologi Bandung, Bandung 40132, Indonesia
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5
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Tanabe I. Spectroscopic analysis focusing on ionic liquid/metal electrode and organic semiconductor interfaces in an electrochemical environment. Phys Chem Chem Phys 2021; 24:615-623. [PMID: 34853835 DOI: 10.1039/d1cp04094d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solid-liquid interface forms an electric double layer that enables the function of electronic devices and, thus, represents an important area of electrochemical research. Because ionic liquids (ILs) are becoming prominent candidates for new high-performing electrolytes, their interface with solid substrates (e.g., metal electrodes or organic semiconductors) attracts substantial attention. An example of improvement achieved using ILs as electrolytes is a decrease in the operating voltage of transistors from >10 V in traditional SiO2-gated transistors to <1 V in IL-gated electronic double-layer organic field-effect devices. This perspective discusses the investigation of poorly accessible IL/substrate interfaces using both attenuated total reflectance ultraviolet (ATR-UV) spectroscopy and a newly developed electrochemical setup combined with ATR-UV (EC-ATR-UV), which allows analysis of the interfacial area under the application of varying electric potential. The recent EC-ATR-UV applications in interfacial analytical chemistry are overviewed and compared to other spectroscopic methods described in the recent literature. Lastly, the supplementation of experimental data with theoretical calculations (e.g., quantum chemical calculations and molecular dynamics simulations) is also addressed.
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Affiliation(s)
- Ichiro Tanabe
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3, Machikaneyama, Toyonaka, Osaka 560-8531, Japan.
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6
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Chen TL, Lathrop PM, Sun R, Elabd YA. Lithium-Ion Transport in Poly(ionic liquid) Diblock Copolymer Electrolytes: Impact of Salt Concentration and Cation and Anion Chemistry. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00694] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tzu-Ling Chen
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Patrick M. Lathrop
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Rui Sun
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Yossef A. Elabd
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
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7
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Gehrke S, Ray P, Stettner T, Balducci A, Kirchner B. Water in Protic Ionic Liquid Electrolytes: From Solvent Separated Ion Pairs to Water Clusters. CHEMSUSCHEM 2021; 14:3315-3324. [PMID: 34169663 PMCID: PMC8456901 DOI: 10.1002/cssc.202100660] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/21/2021] [Indexed: 06/13/2023]
Abstract
The large electrochemical and cycling stability of "water-in-salt" systems have rendered promising prospective electrolytes for batteries. The impact of addition of water on the properties of ionic liquids has already been addressed in several publications. In this contribution, we focus on the changes in the state of water. Therefore, we investigated the protic ionic liquid N-butyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide with varying water content at different temperatures with the aid of molecular dynamics simulations. It is revealed that at very low concentrations, the water is well dispersed and best characterized as shared solvent molecules. At higher concentrations, the water forms larger aggregates and is increasingly approaching a bulk-like state. While the librational and rotational dynamics of the water molecules become faster with increasing concentration, the translational dynamics are found to become slower. Further, all dynamics are found to be faster if the temperature increases. The trends of these findings are well in line with the experimental measured conductivities.
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Affiliation(s)
- Sascha Gehrke
- Mulliken Center for Theoretical ChemistryUniversity of BonnBeringstr. 4+6D-53115BonnGermany
- Department of Physics and AstronomyUniversity College LondonLondonWC1E 6BTUnited Kingdom
| | - Promit Ray
- Mulliken Center for Theoretical ChemistryUniversity of BonnBeringstr. 4+6D-53115BonnGermany
| | - Timo Stettner
- Institute for Technical Chemistry and Environmental ChemistryFriedrich-Schiller-University JenaPhilosophenweg 7aD-07743JenaGermany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena)Friedrich-Schiller-University JenaPhilosophenweg 7aD-07743JenaGermany
| | - Andrea Balducci
- Institute for Technical Chemistry and Environmental ChemistryFriedrich-Schiller-University JenaPhilosophenweg 7aD-07743JenaGermany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena)Friedrich-Schiller-University JenaPhilosophenweg 7aD-07743JenaGermany
| | - Barbara Kirchner
- Mulliken Center for Theoretical ChemistryUniversity of BonnBeringstr. 4+6D-53115BonnGermany
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8
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Migliorati V, Gibiino A, Lapi A, Busato M, D'Angelo P. On the Coordination Chemistry of the lanthanum(III) Nitrate Salt in EAN/MeOH Mixtures. Inorg Chem 2021; 60:10674-10685. [PMID: 34236168 PMCID: PMC8389800 DOI: 10.1021/acs.inorgchem.1c01375] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
A thorough structural
characterization of the La(NO3)3 salt dissolved
into several mixtures of ethyl ammonium
nitrate (EAN) and methanol (MeOH) with EAN molar fraction χEAN ranging from 0 to 1 has been carried out by combining molecular
dynamics (MD) and X-ray absorption spectroscopy (XAS). The XAS and
MD results show that changes take place in the La3+ first
solvation shell when moving from pure MeOH to pure EAN. With increasing
the ionic liquid content of the mixture, the La3+ first-shell
complex progressively loses MeOH molecules to accommodate more and
more nitrate anions. Except in pure EAN, the La3+ ion is
always able to coordinate both MeOH and nitrate anions, with a ratio
between the two ligands that changes continuously in the entire concentration
range. When moving from pure MeOH to pure EAN, the La3+ first solvation shell passes from a 10-fold bicapped square antiprism
geometry where all the nitrate anions act only as monodentate ligands
to a 12-coordinated icosahedral structure in pure EAN where the nitrate
anions bind the La3+ cation both in mono- and bidentate
modes. The La3+ solvation structure formed in the MeOH/EAN
mixtures shows a great adaptability to changes in the composition,
allowing the system to reach the ideal compromise among all of the
different interactions that take place into it. The structural properties of the La(NO3)3 salt dissolved into EAN/methanol mixtures were
characterized
by molecular dynamics and X-ray absorption spectroscopy. The La3+ solvation shell undergoes significant changes with increasing
the ionic liquid content of the mixture, progressively losing methanol
molecules to accommodate more and more nitrate anions. The La3+ solvation structure shows great adaptability to composition
changes, passing from a 10-fold bicapped square antiprism geometry
in pure methanol to a 12-coordinated icosahedral complex in EAN.
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Affiliation(s)
- Valentina Migliorati
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Alice Gibiino
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Andrea Lapi
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Matteo Busato
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Paola D'Angelo
- Dipartimento di Chimica, "La Sapienza" Università di Roma, P.le Aldo Moro 5, 00185 Rome, Italy
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9
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Srinivasan H, Sharma VK, Mitra S. Water accelerates the hydrogen-bond dynamics and abates heterogeneity in deep eutectic solvent based on acetamide and lithium perchlorate. J Chem Phys 2021; 155:024505. [PMID: 34266283 DOI: 10.1063/5.0054942] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Deep eutectic solvents (DESs) have become a prevalent and promising medium in various industrial applications. The addition of water to DESs has attracted a lot of attention as a scheme to modulate their functionalities and improve their physicochemical properties. In this work, we study the effects of water on an acetamide based DES by probing its microscopic structure and dynamics using classical molecular dynamics simulation. It is observed that, at low water content, acetamide still remains the dominant solvate in the first solvation shell of lithium ions, however, beyond 10 wt. %, it is replaced by water. The increase in the water content in the solvent accelerates the H-bond dynamics by drastically decreasing the lifetimes of acetamide-lithium H-bond complexes. Additionally, water-lithium H-bond complexes are also found to form, with systematically longer lifetimes in comparison to acetamide-lithium complexes. Consequently, the diffusivity and ionic conductivity of all the species in the DES are found to increase substantially. Non-Gaussianity parameters for translational motions of acetamide and water in the DES show a conspicuous decrease with addition of water in the system. The signature of jump-like reorientation of acetamide is observed in the DES by quantifying the deviation from rotational Brownian motion. However, a notable decrease in the deviation is observed with an increase in the water content in the DES. This study demonstrates the intricate connection between H-bond dynamics and various microscopic dynamical parameters in the DES, by investigating the modulation of the former with addition of water.
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Affiliation(s)
- H Srinivasan
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S Mitra
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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10
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Venkatanarayanan RI, Lebga-Nebane JL, Wu L, Krishnan S. Lithium coordination and diffusion coefficients of PEGylated ionic liquid and lithium salt blends: A molecular dynamics simulation study. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Judeinstein P, Zeghal M, Constantin D, Iojoiu C, Coasne B. Interplay of Structure and Dynamics in Lithium/Ionic Liquid Electrolytes: Experiment and Molecular Simulation. J Phys Chem B 2021; 125:1618-1631. [PMID: 33535754 DOI: 10.1021/acs.jpcb.0c09597] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite their promising use in electrochemical and electrokinetic devices, ionic-liquid-based electrolytes often exhibit complex behavior arising from a subtle interplay of their structure and dynamics. Here, we report a joint experimental and molecular simulation study of such electrolytes obtained by mixing 1-butyl 3-methylimidazolium tetrafluoroborate with lithium tetrafluoroborate. More in detail, experiments consisting of X-ray scattering, pulsed field gradient NMR, and complex impedance spectroscopy are analyzed in the light of molecular dynamics simulations to probe the structural, dynamical, and electrochemical properties of this ionic-liquid-based electrolyte. Lithium addition promotes the nanostructuration of the liquid as evidenced from the appearance of a scattering prepeak that becomes more pronounced. Microscopically, using the partial structure factors determined from molecular dynamics, this prepeak is shown to correspond to the formation of well-ordered positive/negative charge series and also large aggregates (Lin(BF4)4-m)(4-m+n)-, which develop upon lithium addition. Such nanoscale ordering entails a drastic decrease in both the molecular mobility and ionic conductivity. In particular, the marked association of Li+ cations with four BF4- anions and long ion pairing times, which are promoted upon lithium addition, are found to severely hinder the Li+ transport properties.
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Affiliation(s)
- Patrick Judeinstein
- Université Paris-Saclay, CEA, CNRS, LLB, 91191 Gif-sur-Yvette, France.,Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France
| | - Mehdi Zeghal
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France
| | - Doru Constantin
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France
| | - Cristina Iojoiu
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000 Grenoble, France
| | - Benoit Coasne
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
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12
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Cui J, Kobayashi T, Sacci RL, Matsumoto RA, Cummings PT, Pruski M. Diffusivity and Structure of Room Temperature Ionic Liquid in Various Organic Solvents. J Phys Chem B 2020; 124:9931-9937. [PMID: 33086001 DOI: 10.1021/acs.jpcb.0c07582] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Room-temperature ionic liquids (RTILs) hold promise for applications in electric double layer capacitors (EDLCs), owing to a much wider potential window, lower vapor pressure, and better thermal and chemical stabilities compared to conventional aqueous and organic electrolytes. However, because the low diffusivity of ions in neat RTILs negates the EDLCs' advantage of high power density, the ionic liquids are often used in mixture with organic solvents. In this study, we measured the diffusivity of cations and anions in RTIL, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) ([BMIM+][TFSI-]), mixed with 10 organic solvents, by using the pulsed-field gradient NMR method. The ion diffusivity was found to follow that of neat solvents and in most studied solvents showed an excellent agreement with the predicted values reported in the recent molecular dynamics (MD) study [Thompson, M. W.; J. Phys. Chem. B 2019, 123, 1340-1347]. In two solvents consisting of long-chain molecules, however, the MD simulations predictions slightly underestimated the ionic diffusivities. The degree of ion dissociation was also estimated for each solvent by comparing the ionic conductivity with the molar conductivity derived from the diffusion measurements. The degree of ion dissociation and the hydrodynamic radius of ions suggest that the ions are coordinated by ∼1 solvent molecule. The scarcity of solvent-ion interactions explains the fact that the diffusivity of ions in the mixture significantly depends on the viscosity of the solvent.
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Affiliation(s)
- Jinlei Cui
- U.S. DOE Ames Laboratory, Ames, Iowa 50011, United States
| | | | - Robert L Sacci
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ray A Matsumoto
- Department of Chemical and Biomolecular Engineering and Multiscale Modeling and Simulation Center, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Peter T Cummings
- Department of Chemical and Biomolecular Engineering and Multiscale Modeling and Simulation Center, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Marek Pruski
- U.S. DOE Ames Laboratory, Ames, Iowa 50011, United States.,Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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13
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Chen TL, Sun R, Willis C, Krutzer B, Morgan BF, Beyer FL, Han KS, Murugesan V, Elabd YA. Impact of ionic liquid on lithium ion battery with a solid poly(ionic liquid) pentablock terpolymer as electrolyte and separator. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Lourenço TC, Ebadi M, Brandell D, Da Silva JLF, Costa LT. Interfacial Structures in Ionic Liquid-Based Ternary Electrolytes for Lithium-Metal Batteries: A Molecular Dynamics Study. J Phys Chem B 2020; 124:9648-9657. [PMID: 32965114 DOI: 10.1021/acs.jpcb.0c06500] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Lithium-metal batteries are promising candidates to fulfill the future performance requirements for energy storage applications. However, the tendency to form metallic dendrites and the undesirable side reactions between the electrolyte and the Li electrode lead to poor performance and safety issues in these batteries. Therefore, understanding the interfacial properties and the Li-metal surface/electrolyte interactions is crucial to resolve the remaining obstacles and make these devices feasible. Here, we report a computational study on the interface effects in ternary polymer electrolytes composed by poly(ethylene oxide) (PEO), lithium salts, and different ionic liquids (ILs) confined between two Li-metal slabs. Atomistic simulations are used to characterize the local environment of the Li+ ions and the transport properties in the bulk and at the interface regions. Aggregation of ions at the metal surface is seen in all investigated systems; the structure and composition are directly correlated to the IL components. The strong interactions between the electrolyte species and the Li-metal atoms result in the structuring of the electrolyte at the interface region, in which comparatively small and flat ions result in a well-defined region with extensive Li+ populations and high self-diffusion coefficients. In contrast, large ions such as [P222mom]+ increase the PEO density in the bulk due to large steric effects at the interface. Therefore, the choice of specific ILs in ternary polymer electrolytes can tune the structure-dynamic properties at the Li-metal surface/electrolyte interface, controlling the SEI formation at the electrode surface, and thereby improve battery performance.
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Affiliation(s)
- Tuanan C Lourenço
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 369, 13560-970 São Carlos, São Paulo, Brazil
| | - Mahsa Ebadi
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden
| | - Daniel Brandell
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden
| | - Juarez L F Da Silva
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 369, 13560-970 São Carlos, São Paulo, Brazil
| | - Luciano T Costa
- Institute of Chemistry, Federal Fluminense University-Outeiro de São João Batista, s/n CEP:24020-141 Niterói, RJ, Brazil
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15
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Kikkawa N, Kajita S, Takechi K. Self-Learning Molecular Design for High Lithium-Ion Conductive Ionic Liquids using Maze Game. J Chem Inf Model 2020; 60:4904-4911. [PMID: 32977719 DOI: 10.1021/acs.jcim.0c00692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A self-learning artificial intelligence system for an autonomous molecular search was recently utilized in place of laborious material development processes by humans. In this approach, because the evaluation of unsuitable or unrealistic candidates considerably decreases the search efficiency, prior knowledge of the chemistry and engineering requirements should be embedded into the molecular-generative algorithm. However, when using naive rule-based restrictions, one must implement the complex rule logic into the code each time, depending on the materials and potential applications. Herein, we propose a molecular-generative method using a maze game to control the allowable constituent fragments of molecules, which improves the flexibility and consistency to implement the rules. We performed an autonomous search for optimized cation structures of high Li-ion conductive ionic liquids evaluated by molecular dynamics simulations, in its practically reasonable scope defined by the maze game. From the search, we discover that acyl ammonium cations are favorable for high Li-ion conductivity because of the high association between the cations and Li ions. These results broaden our existing insight owing to the ability to explore beyond our practical experiences.
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Affiliation(s)
- Nobuaki Kikkawa
- Toyota Central R&D Laboratories., Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Seiji Kajita
- Toyota Central R&D Laboratories., Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Kensuke Takechi
- Toyota Central R&D Laboratories., Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan
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16
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Zhang Z, Nasrabadi AT, Aryal D, Ganesan V. Mechanisms of Ion Transport in Lithium Salt-Doped Polymeric Ionic Liquid Electrolytes. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01444] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zidan Zhang
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Amir T. Nasrabadi
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Dipak Aryal
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Venkat Ganesan
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
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17
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Wang YL, Li B, Sarman S, Mocci F, Lu ZY, Yuan J, Laaksonen A, Fayer MD. Microstructural and Dynamical Heterogeneities in Ionic Liquids. Chem Rev 2020; 120:5798-5877. [PMID: 32292036 PMCID: PMC7349628 DOI: 10.1021/acs.chemrev.9b00693] [Citation(s) in RCA: 192] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Indexed: 12/11/2022]
Abstract
Ionic liquids (ILs) are a special category of molten salts solely composed of ions with varied molecular symmetry and charge delocalization. The versatility in combining varied cation-anion moieties and in functionalizing ions with different atoms and molecular groups contributes to their peculiar interactions ranging from weak isotropic associations to strong, specific, and anisotropic forces. A delicate interplay among intra- and intermolecular interactions facilitates the formation of heterogeneous microstructures and liquid morphologies, which further contributes to their striking dynamical properties. Microstructural and dynamical heterogeneities of ILs lead to their multifaceted properties described by an inherent designer feature, which makes ILs important candidates for novel solvents, electrolytes, and functional materials in academia and industrial applications. Due to a massive number of combinations of ion pairs with ion species having distinct molecular structures and IL mixtures containing varied molecular solvents, a comprehensive understanding of their hierarchical structural and dynamical quantities is of great significance for a rational selection of ILs with appropriate properties and thereafter advancing their macroscopic functionalities in applications. In this review, we comprehensively trace recent advances in understanding delicate interplay of strong and weak interactions that underpin their complex phase behaviors with a particular emphasis on understanding heterogeneous microstructures and dynamics of ILs in bulk liquids, in mixtures with cosolvents, and in interfacial regions.
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Affiliation(s)
- Yong-Lei Wang
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Bin Li
- School
of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, P. R. China
| | - Sten Sarman
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Francesca Mocci
- Department
of Chemical and Geological Sciences, University
of Cagliari, I-09042 Monserrato, Italy
| | - Zhong-Yuan Lu
- State
Key Laboratory of Supramolecular Structure and Materials, Institute
of Theoretical Chemistry, Jilin University, Changchun 130021, P. R. China
| | - Jiayin Yuan
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Aatto Laaksonen
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
- State
Key Laboratory of Materials-Oriented and Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
- Centre of
Advanced Research in Bionanoconjugates and Biopolymers, Petru Poni Institute of Macromolecular Chemistry Aleea Grigore Ghica-Voda, 41A, 700487 Iasi, Romania
- Department
of Engineering Sciences and Mathematics, Division of Energy Science, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Michael D. Fayer
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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18
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Guchhait B, Tibbetts CA, Tracy KM, Luther BM, Krummel AT. Ultrafast vibrational dynamics of a trigonal planar anionic probe in ionic liquids (ILs): A two-dimensional infrared (2DIR) spectroscopic investigation. J Chem Phys 2020; 152:164501. [PMID: 32357764 DOI: 10.1063/1.5141751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A major impediment limiting the widespread application of ionic liquids (ILs) is their high shear viscosity. Incorporation of a tricyanomethanide (TCM-) anion in ILs leads to low shear viscosity and improvement of several characteristics suitable for large scale applications. However, properties including interactions of TCM- with the local environment and dynamics of TCM- have not been thoroughly investigated. Herein, we have studied the ultrafast dynamics of TCM- in several imidazolium ILs using linear IR and two-dimensional infrared spectroscopy techniques. The spectral diffusion dynamics of the CN stretching modes of TCM- in all ILs exhibit a nonexponential behavior with a short time component of ∼2 ps and a long time component spanning ∼9 ps to 14 ps. The TCM- vibrational probe reports a significantly faster relaxation of ILs compared to those observed previously using linear vibrational probes, such as thiocyanate and selenocyanate. Our results indicate a rapid relaxation of the local ion-cage structure embedding the vibrational probe in the ILs. The faster relaxation suggests that the lifetime of the local ion-cage structure decreases in the presence of TCM- in the ILs. Linear IR spectroscopic results show that the hydrogen-bonding interaction between TCM- and imidazolium cations in ILs is much weaker. Shorter ion-cage lifetimes together with weaker hydrogen-bonding interactions account for the low shear viscosity of TCM- based ILs compared to commonly used ILs. In addition, this study demonstrates that TCM- can be used as a potential vibrational reporter to study the structure and dynamics of ILs and other molecular systems.
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Affiliation(s)
- Biswajit Guchhait
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Clara A Tibbetts
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Kathryn M Tracy
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Bradley M Luther
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Amber T Krummel
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
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19
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Boaz NC, Smigla EL, Stippich C, Voss C, Mauro NA. X-ray scattering investigation of ion aggregation in imidazolium-based ionic liquids upon doping with lithium, sodium, potassium, rubidium and cesium salts. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Ebadi M, Eriksson T, Mandal P, Costa LT, Araujo CM, Mindemark J, Brandell D. Restricted Ion Transport by Plasticizing Side Chains in Polycarbonate-Based Solid Electrolytes. Macromolecules 2020; 53:764-774. [PMID: 32089567 PMCID: PMC7032846 DOI: 10.1021/acs.macromol.9b01912] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/23/2019] [Indexed: 11/29/2022]
Abstract
Increasing the ionic conductivity has for decades been an overriding goal in the development of solid polymer electrolytes. According to fundamental theories on ion transport mechanisms in polymers, the ionic conductivity is strongly correlated to free volume and segmental mobility of the polymer for the conventional transport processes. Therefore, incorporating plasticizing side chains onto the main chain of the polymer host often appears as a clear-cut strategy to improve the ionic conductivity of the system through lowering of the glass transition temperature (T g). This intended correlation between T g and ionic conductivity is, however, not consistently observed in practice. The aim of this study is therefore to elucidate this interplay between segmental mobility and polymer structure in polymer electrolyte systems comprising plasticizing side chains. To this end, we utilize the synthetic versatility of the ion-conductive poly(trimethylene carbonate) (PTMC) platform. Two types of host polymers with side chains added to a PTMC backbone are employed, and the resulting electrolytes are investigated together with the side chain-free analogue both by experiment and with molecular dynamics (MD) simulations. The results show that while added side chains do indeed lead to a lower T g, the total ionic conductivity is highest in the host matrix without side chains. It was seen in the MD simulations that while side chains promote ionic mobility associated with the polymer chain, the more efficient interchain hopping transport mechanism occurs with a higher probability in the system without side chains. This is connected to a significantly higher solvation site diversity for the Li+ ions in the side-chain-free system, providing better conduction paths. These results strongly indicate that the side chains in fact restrict the mobility of the Li+ ions in the polymer hosts.
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Affiliation(s)
- Mahsa Ebadi
- Department
of Chemistry − Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden
| | - Therese Eriksson
- Department
of Chemistry − Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden
| | - Prithwiraj Mandal
- Department
of Chemistry − Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden
| | - Luciano T. Costa
- Instituto
de Química−Departamento de Físico-química, Universidade Federal Fluminense, Outeiro de São João Batista s/n, CEP 24020-150 Niterói, RJ, Brazil
| | - C. Moyses Araujo
- Materials
Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Jonas Mindemark
- Department
of Chemistry − Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden
| | - Daniel Brandell
- Department
of Chemistry − Ångström Laboratory, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden
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21
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Tong J, Wu S, von Solms N, Liang X, Huo F, Zhou Q, He H, Zhang S. The Effect of Concentration of Lithium Salt on the Structural and Transport Properties of Ionic Liquid-Based Electrolytes. Front Chem 2020; 7:945. [PMID: 32117860 PMCID: PMC7010713 DOI: 10.3389/fchem.2019.00945] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 12/31/2019] [Indexed: 11/18/2022] Open
Abstract
Ionic liquids (ILs) are used as electrolytes in high-performance lithium-ion batteries, which can effectively improve battery safety and energy storage capacity. All atom molecular dynamics simulation and experiment were combined to investigate the effect of the concentration of lithium salt on the performance of electrolytes of four IL solvents ([Cnmim][TFSI] and [Cnmim][FSI], n = 2, 4). The IL electrolytes exhibit higher density and viscosity; meanwhile, larger lithium ion transfer numbers as the concentration of LiTFSI increases. Furthermore, in order to explore the effect of the concentration of lithium salt on the ionic associations of Li+ and anion of IL, the microstructures of the lithium salt in various IL electrolytes at different concentrations were investigated. The structural analysis indicated that strong bidentate and monodentate coordination was found between Li+ and anion of all IL electrolytes. Both cis and trans isomerism of [FSI]− were observed in [FSI]−-type IL electrolyte systems. Furthermore, the existence of the ion cluster [Li[anion]x](x−1)− in IL electrolytes and the cluster became more closed and compact as the concentration of LiTFSI increases.
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Affiliation(s)
- Jiahuan Tong
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China.,Department of Chemical & Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Shengli Wu
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Nicolas von Solms
- Department of Chemical & Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Xiaodong Liang
- Department of Chemical & Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Feng Huo
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Qing Zhou
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Hongyan He
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Suojiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, China
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22
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Migliorati V, Lapi A, D'Angelo P. Unraveling the solvation geometries of the lanthanum(iii) bistriflimide salt in ionic liquid/acetonitrile mixtures. Phys Chem Chem Phys 2020; 22:20434-20443. [PMID: 32915187 DOI: 10.1039/d0cp03977b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
La(Tf2N)3 in C8(mim)2(Tf2N)2/acetonitrile mixtures forms 10-fold coordination complexes composed of both acetonitrile molecules and Tf2N− anions.
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Affiliation(s)
| | - Andrea Lapi
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Paola D'Angelo
- Dipartimento di Chimica
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
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23
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Fiates J, Zhang Y, Franco LFM, Maginn EJ, Doubek G. Impact of anion shape on Li+ solvation and on transport properties for lithium–air batteries: a molecular dynamics study. Phys Chem Chem Phys 2020; 22:15842-15852. [DOI: 10.1039/d0cp00853b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Here we report the influence of the anion shape over the solvation structure and transport properties over commonly employed Li–O2 electrolytes and discuss their implications for the device.
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Affiliation(s)
- Juliane Fiates
- School of Chemical Engineering
- University of Campinas
- Campinas 13083-852
- Brazil
- Department of Chemical and Biomolecular Engineering
| | - Yong Zhang
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- Notre Dame
- USA
| | - Luís F. M. Franco
- School of Chemical Engineering
- University of Campinas
- Campinas 13083-852
- Brazil
| | - Edward J. Maginn
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- Notre Dame
- USA
| | - Gustavo Doubek
- School of Chemical Engineering
- University of Campinas
- Campinas 13083-852
- Brazil
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24
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Imai M, Tanabe I, Ikehata A, Ozaki Y, Fukui KI. Attenuated total reflectance far-ultraviolet and deep-ultraviolet spectroscopy analysis of the electronic structure of a dicyanamide-based ionic liquid with Li+. Phys Chem Chem Phys 2020; 22:21768-21775. [DOI: 10.1039/d0cp03865b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Elucidating the unique electronic structure of ionic liquid molecules around Li+ using electronic absorption spectroscopy, theoretical calculations, and chemometric analyses.
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Affiliation(s)
- Masaya Imai
- Department of Materials Engineering Science
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Ichiro Tanabe
- Department of Materials Engineering Science
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Akifumi Ikehata
- Food Research Institute
- National Agriculture and Food Research Organization (NARO)
- Tsukuba
- Japan
| | - Yukihiro Ozaki
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Ken-ichi Fukui
- Department of Materials Engineering Science
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
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25
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de Souza RM, de Siqueira LJA, Karttunen M, Dias LG. Molecular Dynamics Simulations of Polymer–Ionic Liquid (1-Ethyl-3-methylimidazolium Tetracyanoborate) Ternary Electrolyte for Sodium and Potassium Ion Batteries. J Chem Inf Model 2019; 60:485-499. [DOI: 10.1021/acs.jcim.9b00750] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rafael Maglia de Souza
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 3K7
- Departamento de Química, FFCLRP, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil
- The Center for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario, Canada N6K 3K7
| | - Leonardo José Amaral de Siqueira
- Departamento de Química, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Rua São Nicolau 210, 09913-030, Diadema, SP, Brazil
| | - Mikko Karttunen
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 3K7
- The Center for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario, Canada N6K 3K7
- Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada N6A 5B7
| | - Luis Gustavo Dias
- Departamento de Química, FFCLRP, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil
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26
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Huang Q, Lee YY, Gurkan B. Pyrrolidinium Ionic Liquid Electrolyte with Bis(trifluoromethylsulfonyl)imide and Bis(fluorosulfonyl)imide Anions: Lithium Solvation and Mobility, and Performance in Lithium Metal–Lithium Iron Phosphate Batteries. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03202] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qianwen Huang
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Yun-Yang Lee
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Burcu Gurkan
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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27
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Nasrabadi AT, Ganesan V. Structure and Transport Properties of Lithium-Doped Aprotic and Protic Ionic Liquid Electrolytes: Insights from Molecular Dynamics Simulations. J Phys Chem B 2019; 123:5588-5600. [DOI: 10.1021/acs.jpcb.9b04477] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amir Taghavi Nasrabadi
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Venkat Ganesan
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
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28
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Ray P, Elfgen R, Kirchner B. Cation influence on heterocyclic ammonium ionic liquids: a molecular dynamics study. Phys Chem Chem Phys 2019; 21:4472-4486. [DOI: 10.1039/c8cp07683a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four different ionic liquids (ILs) consisting of the bis(trifluoromethanesulfonyl)imide ([NTf2]−) anion, with structurally similar systematically varying cations, are investigated herein through classical molecular dynamics.
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Affiliation(s)
- Promit Ray
- Mulliken Center for Theoretical Chemistry
- Rheinische Friedrich-Wilhelms-Universität Bonn
- D-53115 Bonn
- Germany
| | - Roman Elfgen
- Mulliken Center for Theoretical Chemistry
- Rheinische Friedrich-Wilhelms-Universität Bonn
- D-53115 Bonn
- Germany
- Max Planck Institute for Chemical Energy Conversion
| | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry
- Rheinische Friedrich-Wilhelms-Universität Bonn
- D-53115 Bonn
- Germany
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29
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Huang Q, Lourenço TC, Costa LT, Zhang Y, Maginn EJ, Gurkan B. Solvation Structure and Dynamics of Li+ in Ternary Ionic Liquid–Lithium Salt Electrolytes. J Phys Chem B 2018; 123:516-527. [DOI: 10.1021/acs.jpcb.8b08859] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Qianwen Huang
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Tuanan C. Lourenço
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556-5637, United States
- Department of Physical Chemistry, Fluminense Federal University, Outeiro de São João Batista s/n, CEP 24020-141 Niterói, Rio de Janeiro, Brazil
| | - Luciano T. Costa
- Department of Physical Chemistry, Fluminense Federal University, Outeiro de São João Batista s/n, CEP 24020-141 Niterói, Rio de Janeiro, Brazil
| | - Yong Zhang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556-5637, United States
| | - Edward J. Maginn
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556-5637, United States
| | - Burcu Gurkan
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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30
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Ray P, Balducci A, Kirchner B. Molecular Dynamics Simulations of Lithium-Doped Ionic-Liquid Electrolytes. J Phys Chem B 2018; 122:10535-10547. [DOI: 10.1021/acs.jpcb.8b06022] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Promit Ray
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstr. 4+6, D-53115 Bonn, Germany
| | | | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstr. 4+6, D-53115 Bonn, Germany
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31
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Sessa F, Migliorati V, Lapi A, D’Angelo P. Ce3+ and La3+ ions in ethylammonium nitrate: A XANES and molecular dynamics investigation. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.06.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Lourenço TC, Zhang Y, Costa LT, Maginn EJ. A molecular dynamics study of lithium-containing aprotic heterocyclic ionic liquid electrolytes. J Chem Phys 2018; 148:193834. [DOI: 10.1063/1.5016276] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Tuanan C. Lourenço
- Instituto de Química, Universidade Federal Fluminense–Outeiro de São João Batista, s/n CEP:24020-141, Niterói, RJ, Brazil
| | - Yong Zhang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Luciano T. Costa
- Instituto de Química, Universidade Federal Fluminense–Outeiro de São João Batista, s/n CEP:24020-141, Niterói, RJ, Brazil
| | - Edward J. Maginn
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA
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33
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Serva A, Migliorati V, Spezia R, D'Angelo P. How Does CeIII
Nitrate Dissolve in a Protic Ionic Liquid? A Combined Molecular Dynamics and EXAFS Study. Chemistry 2017; 23:8424-8433. [DOI: 10.1002/chem.201604889] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Alessandra Serva
- Dipartimento di Chimica; Università di Roma “La Sapienza”; P. le A. Moro 5 00185 Roma Italy
| | - Valentina Migliorati
- Dipartimento di Chimica; Università di Roma “La Sapienza”; P. le A. Moro 5 00185 Roma Italy
| | - Riccardo Spezia
- LAMBE CEA, CNRS; Université Paris Saclay; 91025 Evry Cedex France
- LAMBE Université d'Evry; 91025 Evry Cedex France
| | - Paola D'Angelo
- Dipartimento di Chimica; Università di Roma “La Sapienza”; P. le A. Moro 5 00185 Roma Italy
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34
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Sharma A, Zhang Y, Gohndrone T, Oh S, Brennecke JF, McCready MJ, Maginn EJ. How mixing tetraglyme with the ionic liquid 1-n-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide changes volumetric and transport properties: An experimental and computational study. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2016.05.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Abstract
The diffusivity of ions in liquid solutions is known either to decrease with an increase in the ion size or to have a single maximum depending on the ion size. This article presents evidence for the appearance of multiple maxima and thus multiple ion sizes with enhanced diffusivity.
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Affiliation(s)
- Maksim A. Orekhov
- Moscow Institute of Physics and Technology (State University)
- Dolgoprudny
- Russia
- National Research University Higher School of Economics (NRU HSE)
- Moscow
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36
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Otani A, Zhang Y, Matsuki T, Kamio E, Matsuyama H, Maginn EJ. Molecular Design of High CO2 Reactivity and Low Viscosity Ionic Liquids for CO2 Separative Facilitated Transport Membranes. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00188] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Akihito Otani
- Department
of Chemical and Biomolecular Engineering, University of Notre Dame, Notre
Dame, Indiana 46556, United States
- Center
for Membrane and Film Technology, Department of Chemical Science and
Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Yong Zhang
- Department
of Chemical and Biomolecular Engineering, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Tatsuya Matsuki
- Center
for Membrane and Film Technology, Department of Chemical Science and
Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Eiji Kamio
- Center
for Membrane and Film Technology, Department of Chemical Science and
Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Hideto Matsuyama
- Center
for Membrane and Film Technology, Department of Chemical Science and
Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Edward J. Maginn
- Department
of Chemical and Biomolecular Engineering, University of Notre Dame, Notre
Dame, Indiana 46556, United States
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37
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Jung SH, Federici Canova F, Akagi K. Characteristics of Lithium Ions and Superoxide Anions in EMI-TFSI and Dimethyl Sulfoxide. J Phys Chem A 2016; 120:364-71. [DOI: 10.1021/acs.jpca.5b09692] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sun-ho Jung
- Advanced
Institute for Materials Research, Tohoku University, Katahira, Sendai, Japan
| | | | - Kazuto Akagi
- Advanced
Institute for Materials Research, Tohoku University, Katahira, Sendai, Japan
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38
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Ionic conductivities of Li+ based ionic liquids. ELECTROCHEMISTRY 2016. [DOI: 10.1007/978-3-642-02723-9_58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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39
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Murphy T, Callear SK, Warr GG, Atkin R. Dissolved chloride markedly changes the nanostructure of the protic ionic liquids propylammonium and ethanolammonium nitrate. Phys Chem Chem Phys 2016; 18:17169-82. [DOI: 10.1039/c5cp06947e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The bulk nanostructure of 15 mol% propylammonium chloride (PACl) dissolved in propylammonium nitrate (PAN) and 15 mol% ethanolammonium chloride (EtACl) in ethanolammonium nitrate (EtAN) has been determined using neutron diffraction with empirical potential structure refinement fits.
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Affiliation(s)
- Thomas Murphy
- Priority Research Centre for Advanced Fluids and Interfaces
- The University of Newcastle
- Callaghan
- Australia
| | | | | | - Rob Atkin
- Priority Research Centre for Advanced Fluids and Interfaces
- The University of Newcastle
- Callaghan
- Australia
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40
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Curotto E. Ion-Stockmayer clusters: Minima, classical thermodynamics, and variational ground state estimates of Li+(CH3NO2)n(n= 1–20). J Chem Phys 2015; 143:214301. [DOI: 10.1063/1.4936587] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- E. Curotto
- Department of Chemistry and Physics, Arcadia University, Glenside, Pennsylvania 19038-3295, USA
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41
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Haskins JB, Bauschlicher CW, Lawson JW. Ab Initio Simulations and Electronic Structure of Lithium-Doped Ionic Liquids: Structure, Transport, and Electrochemical Stability. J Phys Chem B 2015; 119:14705-19. [PMID: 26505208 DOI: 10.1021/acs.jpcb.5b06951] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Density functional theory (DFT), density functional theory molecular dynamics (DFT-MD), and classical molecular dynamics using polarizable force fields (PFF-MD) are employed to evaluate the influence of Li(+) on the structure, transport, and electrochemical stability of three potential ionic liquid electrolytes: N-methyl-N-butylpyrrolidinium bis(trifluoromethanesulfonyl)imide ([pyr14][TFSI]), N-methyl-N-propylpyrrolidinium bis(fluorosulfonyl)imide ([pyr13][FSI]), and 1-ethyl-3-methylimidazolium boron tetrafluoride ([EMIM][BF4]). We characterize the Li(+) solvation shell through DFT computations of [Li(Anion)n]((n-1)-) clusters, DFT-MD simulations of isolated Li(+) in small ionic liquid systems, and PFF-MD simulations with high Li-doping levels in large ionic liquid systems. At low levels of Li-salt doping, highly stable solvation shells having two to three anions are seen in both [pyr14][TFSI] and [pyr13][FSI], whereas solvation shells with four anions dominate in [EMIM][BF4]. At higher levels of doping, we find the formation of complex Li-network structures that increase the frequency of four anion-coordinated solvation shells. A comparison of computational and experimental Raman spectra for a wide range of [Li(Anion)n]((n-1)-) clusters shows that our proposed structures are consistent with experiment. We then compute the ion diffusion coefficients and find measures from small-cell DFT-MD simulations to be the correct order of magnitude, but influenced by small system size and short simulation length. Correcting for these errors with complementary PFF-MD simulations, we find DFT-MD measures to be in close agreement with experiment. Finally, we compute electrochemical windows from DFT computations on isolated ions, interacting cation/anion pairs, and liquid-phase systems with Li-doping. For the molecular-level computations, we generally find the difference between ionization energy and electron affinity from isolated ions and interacting cation/anion pairs to provide upper and lower bounds, respectively, to experiment. In the liquid phase, we find the difference between the lowest unoccupied and highest occupied electronic levels in pure and hybrid functionals to provide lower and upper bounds, respectively, to experiment. Li-doping in the liquid-phase systems results in electrochemical windows little changed from the neat systems.
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Affiliation(s)
- Justin B Haskins
- AMA Inc., Thermal Protection Materials Branch, Mail Stop 234-1, ‡Entry Systems and Technology Division, Mail Stop 230-3, and §Thermal Protection Materials Branch, Mail Stop 234-1, NASA Ames Research Center , Moffett Field, California 94035, United States
| | - Charles W Bauschlicher
- AMA Inc., Thermal Protection Materials Branch, Mail Stop 234-1, ‡Entry Systems and Technology Division, Mail Stop 230-3, and §Thermal Protection Materials Branch, Mail Stop 234-1, NASA Ames Research Center , Moffett Field, California 94035, United States
| | - John W Lawson
- AMA Inc., Thermal Protection Materials Branch, Mail Stop 234-1, ‡Entry Systems and Technology Division, Mail Stop 230-3, and §Thermal Protection Materials Branch, Mail Stop 234-1, NASA Ames Research Center , Moffett Field, California 94035, United States
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42
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43
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Affiliation(s)
- Robert Hayes
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, NSW 2006, Sydney, Australia
| | - Rob Atkin
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
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44
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Chapela GA, Guzmán O, Díaz-Herrera E, del Río F. Room temperature ionic liquids: A simple model. Effect of chain length and size of intermolecular potential on critical temperature. J Chem Phys 2015; 142:154508. [DOI: 10.1063/1.4917312] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Araque JC, Yadav SK, Shadeck M, Maroncelli M, Margulis CJ. How Is Diffusion of Neutral and Charged Tracers Related to the Structure and Dynamics of a Room-Temperature Ionic Liquid? Large Deviations from Stokes–Einstein Behavior Explained. J Phys Chem B 2015; 119:7015-29. [DOI: 10.1021/acs.jpcb.5b01093] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Juan C. Araque
- Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Sharad K. Yadav
- Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Michael Shadeck
- Department
of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Mark Maroncelli
- Department
of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Claudio J. Margulis
- Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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46
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Zhang Y, Maginn EJ. Direct Correlation between Ionic Liquid Transport Properties and Ion Pair Lifetimes: A Molecular Dynamics Study. J Phys Chem Lett 2015; 6:700-5. [PMID: 26262489 DOI: 10.1021/acs.jpclett.5b00003] [Citation(s) in RCA: 165] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Self-diffusivities as a function of temperature were computed for 29 different ionic liquids (ILs) covering a wide variety of cation and anion classes. Ideal ionic conductivities (σNE) were estimated from the self-diffusivities via the Nernst-Einstein relation. The ion pair (IP) lifetimes (τIP) and ion cage (IC) lifetimes (τIC) of each IL were also computed. A linear relationship between the calculated self-diffusivities and the inverse of IP or IC lifetimes was observed. A similar inverse linear relationship was also observed for ideal ionic conductivity. These relationships were found to be independent of temperature and the nature of the IL. These observations connect macroscopic dynamic properties with local atomic-level motions and strongly suggest that the dynamics of ILs are governed by a universal IP or IC forming and breaking mechanism. Thus, in order to design an ionic liquid with enhanced dynamics, one should consider how to minimize IP or IC lifetimes.
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Affiliation(s)
- Yong Zhang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Edward J Maginn
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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47
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Eilmes A, Kubisiak P. Stability of ion triplets in ionic liquid/lithium salt solutions: Insights from implicit and explicit solvent models and molecular dynamics simulations. J Comput Chem 2015; 36:751-62. [DOI: 10.1002/jcc.23853] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/14/2015] [Accepted: 01/17/2015] [Indexed: 01/01/2023]
Affiliation(s)
- Andrzej Eilmes
- Jagiellonian University, Faculty of Chemistry, Department of Computational Methods in Chemistry; Ingardena 3 30-060 Kraków Poland
| | - Piotr Kubisiak
- Jagiellonian University, Faculty of Chemistry, Department of Computational Methods in Chemistry; Ingardena 3 30-060 Kraków Poland
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48
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Shimizu K, Freitas AA, Atkin R, Warr GG, FitzGerald PA, Doi H, Saito S, Ueno K, Umebayashi Y, Watanabe M, Canongia Lopes JN. Structural and aggregate analyses of (Li salt + glyme) mixtures: the complex nature of solvate ionic liquids. Phys Chem Chem Phys 2015; 17:22321-35. [DOI: 10.1039/c5cp03414k] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure and interactions of different (lithium salt plus glyme) equimolar mixtures are probed by Molecular Dynamics simulations.
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Affiliation(s)
- Karina Shimizu
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049 001 Lisboa
- Portugal
| | - Adilson A. Freitas
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049 001 Lisboa
- Portugal
| | - Rob Atkin
- Discipline of Chemistry
- The University of Newcastle
- NSW 2308
- Australia
| | - Gregory G. Warr
- School of Chemistry
- The University of Sydney
- NSW 2006
- Australia
| | | | - Hiroyuki Doi
- Graduate School of Science and Technology
- Niigata University
- Niigata City 950-2181
- Japan
| | - Soshi Saito
- Graduate School of Science and Technology
- Niigata University
- Niigata City 950-2181
- Japan
| | - Kazuhide Ueno
- Department of Applied Chemistry
- Yamaguchi University
- Yamaguchi 755-8611
- Japan
| | - Yasuhiro Umebayashi
- Graduate School of Science and Technology
- Niigata University
- Niigata City 950-2181
- Japan
| | - Masayoshi Watanabe
- Department of Chemistry and Biotechnology
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - José N. Canongia Lopes
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049 001 Lisboa
- Portugal
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49
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Haskins JB, Bennett WR, Wu JJ, Hernández DM, Borodin O, Monk JD, Bauschlicher CW, Lawson JW. Computational and Experimental Investigation of Li-Doped Ionic Liquid Electrolytes: [pyr14][TFSI], [pyr13][FSI], and [EMIM][BF4]. J Phys Chem B 2014; 118:11295-309. [DOI: 10.1021/jp5061705] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - William R. Bennett
- Electrochemistry
Branch, NASA Glenn Research Center, Cleveland, Ohio 44135, United States
| | - James J. Wu
- Electrochemistry
Branch, NASA Glenn Research Center, Cleveland, Ohio 44135, United States
| | - Dionne M. Hernández
- Electrochemistry
Branch, NASA Glenn Research Center, Cleveland, Ohio 44135, United States
| | - Oleg Borodin
- Electrochemistry Branch, Sensor & Electron Devices Directorate, U.S. Army Research Laboratory, Adelphi, Maryland 20783, United States
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50
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Zhang Y, Shi C, Brennecke JF, Maginn EJ. Refined method for predicting electrochemical windows of ionic liquids and experimental validation studies. J Phys Chem B 2014; 118:6250-5. [PMID: 24823869 DOI: 10.1021/jp5034257] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A combined classical molecular dynamics (MD) and ab initio MD (AIMD) method was developed for the calculation of electrochemical windows (ECWs) of ionic liquids. In the method, the liquid phase of ionic liquid is explicitly sampled using classical MD. The electrochemical window, estimated by the energy difference between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), is calculated at the density functional theory (DFT) level based on snapshots obtained from classical MD trajectories. The snapshots were relaxed using AIMD and quenched to their local energy minima, which assures that the HOMO/LUMO calculations are based on stable configurations on the same potential energy surface. The new procedure was applied to a group of ionic liquids for which the ECWs were also experimentally measured in a self-consistent manner. It was found that the predicted ECWs not only agree with the experimental trend very well but also the values are quantitatively accurate. The proposed method provides an efficient way to compare ECWs of ionic liquids in the same context, which has been difficult in experiments or simulation due to the fact that ECW values sensitively depend on experimental setup and conditions.
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Affiliation(s)
- Yong Zhang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame , Notre Dame, Indiana 46556, United States
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