1
|
Gholivand H, Salehi-Khojin A, Khalili-Araghi F. Phase Separation and Ion Diffusion in Ionic Liquid, Organic Solvent, and Lithium Salt Electrolyte Mixtures. J Phys Chem B 2023; 127:7531-7541. [PMID: 37589395 DOI: 10.1021/acs.jpcb.3c01618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
The highly desirable characteristics of ternary mixtures of ionic liquids, organic solvents, and metal salts make them a promising candidate for use in various electrothermal energy storage and conversion systems. In this study, using large-scale classical molecular dynamics simulations, we looked into 10 different ternary electrolyte mixtures using combinations of [EMIM]+, [BMIM]+, and [OMIM]+ cations with [NO3]-, [BF4]-, [PF6]-, [ClO4]-, [TFO]-, and [NTf2]- anions, tetraglyme, and Li salt to study the effect of ionic liquid composition on the phase behavior of ternary electrolyte mixtures. We uncovered that in these electrolytes, phase separation is mainly a function of pairwise binding energy of the constituents of the mixture. To corroborate this theory, several simulations are performed at various temperatures ranging from 260 to 500 K for each mixture, followed by calculating the binding energy of ionic liquid pairs using density functional theory. Our results verify that the transition temperature for the phase separation of each system is indeed a function of the pairwise binding energy of its ionic liquid pairs. It is also found that in some cases, the diffusion coefficient of the Li+ ions decreased even with the increase in the temperature, an effect that is attributed to the presence of condensed ionic domains in the electrolyte. This study provides a new insight for the design of multicomponent electrolyte mixtures for a wide range of energy applications.
Collapse
Affiliation(s)
- Hamed Gholivand
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Amin Salehi-Khojin
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Fatemeh Khalili-Araghi
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| |
Collapse
|
2
|
Meng Y, Liu R, Wang L, Li F, Tian Y, Lu H. Binding affinity and conformational change predictions for a series of inhibitors with RuBisCO in a carbon dioxide gas and water environment by multiple computational methods. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
|
3
|
Zhang S, Nishi N, Katakura S, Sakka T. Evaluation of static differential capacitance at the [C 4mim +][TFSA -]/electrode interface using molecular dynamics simulation combined with electrochemical surface plasmon resonance measurements. Phys Chem Chem Phys 2021; 23:13905-13917. [PMID: 34132289 DOI: 10.1039/d1cp01435h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Molecular dynamic (MD) simulations have been performed for 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([C4mim+][TFSA-]), an ionic liquid (IL), on a charged graphene electrode to achieve the quantitative analysis of the static differential capacitance using the electrochemical surface plasmon resonance (ESPR). The MD simulations have provided the surface charge density on the electrode and ionic distributions in the electric double layer, both of which are indispensable for the evaluation of static differential capacitance using ESPR but are difficult to be measured by experimental techniques. This approach has allowed the quantitative analysis and explanation of the SPR angle shift in ESPR. The major contribution to the SPR angle shift is found to be the change in ionic concentrations of the first ionic layer on the electrode, owing to higher polarizabilities of ions in the first ionic layer than those in the overlayers. Moreover, the ionic orientation on the electrode and ionic multilayer structure have also been investigated in detail. The butyl group of C4mim+ in the first ionic layer is found to provide extra room for C4mim+ in the second ionic layer but exclude TFSA-, which affects the interval and regularity of ionic multilayers.
Collapse
Affiliation(s)
- Shiwei Zhang
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
| | | | | | | |
Collapse
|
4
|
Fuladi S, Gholivand H, Ahmadiparidari A, Curtiss LA, Salehi-Khojin A, Khalili-Araghi F. Multicomponent Phase Separation in Ternary Mixture Ionic Liquid Electrolytes. J Phys Chem B 2021; 125:7024-7032. [PMID: 34102840 DOI: 10.1021/acs.jpcb.1c01327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigate the phase behavior of ternary mixtures of ionic liquid, organic solvent, and lithium salt by molecular dynamics simulations. We find that at room temperature, the electrolyte separates into distinct phases with specific compositions; an ion-rich domain that contains a fraction of solvent molecules and a second domain of pure solvent. The phase separation is shown to be entropy-driven and is independent of lithium salt concentration. Phase separation is only observed at microsecond time scales and greatly affects the transport properties of the electrolyte.
Collapse
Affiliation(s)
- Shadi Fuladi
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Hamed Gholivand
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Alireza Ahmadiparidari
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Larry A Curtiss
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Amin Salehi-Khojin
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Fatemeh Khalili-Araghi
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| |
Collapse
|
5
|
El-Dossoki FI, Abd El-Maksoud SAEH, Migahed MA, Gouda MM. Micellization and Solvation Properties of Newly Synthesized Imidazolium- and Aminium-Based Surfactants. ACS OMEGA 2020; 5:9429-9441. [PMID: 32363295 PMCID: PMC7191861 DOI: 10.1021/acsomega.0c00603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
This work aimed to study the solvation properties of newly synthesized cationic surfactants: 1-hexyl-1-methyl-1H-imidazol-1-ium bromide (R6Im), 1-dodecyl-1-methyl-1H-imidazol-1-ium bromide (R12Im), N,N,N-tributylhexan-1-aminium bromide (R6N4), and N,N,N-tributyldodecan-1-aminium bromide (R12N4) in water and ethanol-water solvents with a 0.237 mole fraction of ethanol at 298.15 K using conductivity, refractive index, surface tension, and density measurements. Critical micelle concentration (CMC) for the synthesized surfactants was determined and discussed. Thermodynamic parameters including association constant, molal volume, and polarizability were calculated and discussed. Some surface properties of surfactants including excess surface concentration and minimum area per molecule were also calculated and discussed. A good agreement was found between the CMC values obtained from different techniques, such as conductivity, refractive index, and surface tension. Imidazolium surfactants had been proved to decrease the CMC and increase the association constant with the increase of ethanol mole fraction, while tributylamine had been proved to increase the CMC and decrease the association constant with the increase of ethanol mole fraction. Also, imidazolium surfactants had been proved to have higher CMC than tributylamine, which may be related to higher solvation of imidazolium surfactants than that of tributylamine. Both surfactants (R12Im) and (R12N4) were proved to have lesser CMC.
Collapse
Affiliation(s)
| | | | - Mohamed A. Migahed
- Petroleum
Applications Department, Egyptian Petroleum
Research Institute (EPRI), Cairo 11727, Egypt
| | - Mahmoud M. Gouda
- Chemistry
Department, Faculty of Science, Port Said
University, Port Said 42522, Egypt
| |
Collapse
|
6
|
Hasani M, Varela LM, Martinelli A. Short-Range Order and Transport Properties in Mixtures of the Protic Ionic Liquid [C 2HIm][TFSI] with Water or Imidazole. J Phys Chem B 2020; 124:1767-1777. [PMID: 31999926 DOI: 10.1021/acs.jpcb.9b10454] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We investigate the effect of adding different molecular cosolvents, water or imidazole, to the protic ionic liquid 1-ethylimidazolium bis(trifluoromethanesulfonyl)imide, i.e., [C2HIm][TFSI]. We explore how the added cosolvent distributes within the ionic liquid by means of molecular dynamics simulations and X-ray scattering. We also analyze the degree of short-range heterogeneity in the resulting mixtures, finding that while imidazole easily mixes with the protic ionic liquid, water tends to form small clusters in its own water-rich domains. These differences are rationalized by invoking the nature of intermolecular interactions. In aqueous mixtures water-water hydrogen bonds are more likely to form than water-ion hydrogen bonds (water-TFSI bonds being particularly weak), while imidazole can interact with both cations and anions. Hence, the cation-anion association is negligibly influenced by the presence of water, whereas the addition of imidazole creates solvent-separated ion pairs and is thus able to also increase the ionicity. As a consequence of these structural and interactional features, transport properties like self-diffusion and ionic conductivity also show different composition dependencies. While the mobility of both ions and solvent is increased considerably by the addition of water, upon adding imidazole this property changes significantly only for molar fractions of imidazole above 0.6. At these molar fractions, which correspond to a base-excess composition, the imidazole/[C2HIm][TFSI] mixture behaves as a glass-forming liquid with suppressed phase transitions, while homomixtures such as imidazole/[HIm][TFSI] can display a eutectic point.
Collapse
Affiliation(s)
- Mohammad Hasani
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Luis Miguel Varela
- Department of Applied and Particle Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Anna Martinelli
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| |
Collapse
|
7
|
Alcalde R, Atilhan M, Aparicio S. Intermolecular forces in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide + ethanol mixtures. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.02.064] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
8
|
Voroshylova IV, Ferreira ESC, Malček M, Costa R, Pereira CM, Cordeiro MNDS. Influence of the anion on the properties of ionic liquid mixtures: a molecular dynamics study. Phys Chem Chem Phys 2018; 20:14899-14918. [DOI: 10.1039/c8cp01541d] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Big anions enhance the non-polar network in IL mixtures, while smaller ones win the competition for the imidazolium cation.
Collapse
Affiliation(s)
- Iuliia V. Voroshylova
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- Rua do Campo Alegre
| | - Elisabete S. C. Ferreira
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- Rua do Campo Alegre
| | - Michal Malček
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- Rua do Campo Alegre
| | - Renata Costa
- CIQUP – Physical Analytical Chemistry and Electrochemistry group
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- Rua do Campo Alegre
| | - Carlos M. Pereira
- CIQUP – Physical Analytical Chemistry and Electrochemistry group
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- Rua do Campo Alegre
| | - M. Natália D. S. Cordeiro
- LAQV@REQUIMTE
- Faculdade de Ciências
- Universidade do Porto
- Departamento de Química e Bioquímica
- Rua do Campo Alegre
| |
Collapse
|