1
|
Chen K, Shen X, Luo L, Chen H, Cao R, Feng X, Chen W, Fang Y, Cao Y. Correlating the Solvating Power of Solvents with the Strength of Ion-Dipole Interaction in Electrolytes of Lithium-ion Batteries. Angew Chem Int Ed Engl 2023; 62:e202312373. [PMID: 37806968 DOI: 10.1002/anie.202312373] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/07/2023] [Accepted: 10/07/2023] [Indexed: 10/10/2023]
Abstract
The solvation structure of Li+ plays a significant role in determining the physicochemical properties of electrolytes. However, to date, there is still no clear definition of the solvating power of different electrolyte solvents, and even the solvents that preferentially participate in the solvation structure remain controversial. In this study, we comprehensively discuss the solvating power and solvation process of Li+ ions using both experimental characterizations and theoretical calculations. Our findings reveal that the solvating power is dependent on the strength of the Li+ -solvent (ion-dipole) interaction. Additionally, we uncover that the anions tend to enter the solvation sheath in most electrolyte systems through Li+ -anion (ion-ion) interaction, which is weakened by the shielding effect of solvents. The competition between the Li+ -solvent and Li+ -anion interactions ultimately determines the final solvation structures. This insight into the fundamental understanding of the solvation structure of Li+ provides inspiration for the design of multifunctional mixed-solvent electrolytes for advanced batteries.
Collapse
Affiliation(s)
- Kean Chen
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China
| | - Xiaohui Shen
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China
| | - Laibing Luo
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China
| | - Hui Chen
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China
| | - Ruoyu Cao
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Xiangming Feng
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Weihua Chen
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Yongjin Fang
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China
| | - Yuliang Cao
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, China
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830017, Xinjiang, China
| |
Collapse
|
2
|
Solvation structure and dynamics of a small ion in an organic electrolyte. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
|
3
|
Yan F, Mukherjee K, Maroncelli M, Kim HJ. Infrared Spectroscopy of Li + Solvation in EmimBF 4 and in Propylene Carbonate: Ab Initio Molecular Dynamics and Experiment. J Phys Chem B 2022; 126:9643-9662. [DOI: 10.1021/acs.jpcb.2c06326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Fangyong Yan
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Kallol Mukherjee
- 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
| | - Hyung J. Kim
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
4
|
Dynamics of a PEG based polymer gel Electrolyte: A combined frequency dependent dielectric relaxation and Time-resolved fluorescence spectroscopic study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
5
|
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.
Collapse
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
| |
Collapse
|
6
|
|
7
|
Chen W, Li B, Zhao C, Zhao M, Yuan T, Sun R, Huang J, Zhang Q. Electrolyte Regulation towards Stable Lithium‐Metal Anodes in Lithium–Sulfur Batteries with Sulfurized Polyacrylonitrile Cathodes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912701] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Wei‐Jing Chen
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
- Beijing Key Laboratory of Lignocellulosic ChemistryBeijing Forestry University Beijing 100083 P. R. China
| | - Bo‐Quan Li
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
| | - Chang‐Xin Zhao
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
| | - Meng Zhao
- Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of Technology Beijing 100081 P. R. China
| | - Tong‐Qi Yuan
- Beijing Key Laboratory of Lignocellulosic ChemistryBeijing Forestry University Beijing 100083 P. R. China
| | - Run‐Cang Sun
- Center for Lignocellulose Science and EngineeringDalian Polytechnic University Dalian 116034 P. R. China
| | - Jia‐Qi Huang
- Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of Technology Beijing 100081 P. R. China
| | - Qiang Zhang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
| |
Collapse
|
8
|
Chen W, Li B, Zhao C, Zhao M, Yuan T, Sun R, Huang J, Zhang Q. Electrolyte Regulation towards Stable Lithium‐Metal Anodes in Lithium–Sulfur Batteries with Sulfurized Polyacrylonitrile Cathodes. Angew Chem Int Ed Engl 2020; 59:10732-10745. [DOI: 10.1002/anie.201912701] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Wei‐Jing Chen
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
- Beijing Key Laboratory of Lignocellulosic ChemistryBeijing Forestry University Beijing 100083 P. R. China
| | - Bo‐Quan Li
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
| | - Chang‐Xin Zhao
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
| | - Meng Zhao
- Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of Technology Beijing 100081 P. R. China
| | - Tong‐Qi Yuan
- Beijing Key Laboratory of Lignocellulosic ChemistryBeijing Forestry University Beijing 100083 P. R. China
| | - Run‐Cang Sun
- Center for Lignocellulose Science and EngineeringDalian Polytechnic University Dalian 116034 P. R. China
| | - Jia‐Qi Huang
- Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of Technology Beijing 100081 P. R. China
| | - Qiang Zhang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua University Beijing 100084 P. R. China
| |
Collapse
|
9
|
|
10
|
Liu M, Chimtali PJ, Huang XB, Zhang RB. Structures and dynamic properties of the LiPF 6 electrolytic solution under electric fields - a theoretical study. Phys Chem Chem Phys 2019; 21:13186-13193. [PMID: 31172997 DOI: 10.1039/c9cp00561g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorinated carbonates have attracted increasing attention in high-voltage lithium ion battery applications. Under free and electric fields, their structure-related solvent dynamic properties such as charge and discharge rate, however, are rarely reported. Herein, solutions including linear fluorinated carbonates have been simulated using joint MD/DFT calculations. For the first time, the dielectric constants of the four pure fluorinated carbonates have been predicted to be ca. 5.4 (4: ethyl-2,2,2-trifluoroethyl carbonate)-12.1 (7: di-1,1,2,2,2-pentafluoroethyl carbonate), which are dependent on the number of fluorine atoms. Minor difference in the solvation free energies and few contact ion associations were observed in the ETFEC and DTFEC solvents. Their comparable viscosity values were found through calculations of ion diffusivity and conductivity. In the electric fields, the Li+ mobilities in the two solutions have similar values, showing that the dynamic properties of the electrolytic solutions are almost independent of the number of fluorine atoms on these carbonates. There emerges an oriented and ordered arrangement of the solvent molecules and thus the largely decreased dielectric constants under the electric fields, even though the field strength is very low. These interesting phenomena should be relevant in the formation of contact and aggregate ion pairs, leading to unexpected reduction of the charge-discharge rate-related ion mobility in mixed solvents.
Collapse
Affiliation(s)
- Man Liu
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, South Street No. 5, Zhongguancun, Haidian District, 100081 Beijing, China.
| | | | | | | |
Collapse
|
11
|
Molinari N, Mailoa JP, Kozinsky B. General Trend of a Negative Li Effective Charge in Ionic Liquid Electrolytes. J Phys Chem Lett 2019; 10:2313-2319. [PMID: 30999751 DOI: 10.1021/acs.jpclett.9b00798] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We show that strong cation-anion interactions in a wide range of lithium-salt/ionic liquid mixtures result in a negative lithium transference number, using molecular dynamics simulations and rigorous concentrated solution theory. This behavior fundamentally deviates from that obtained using self-diffusion coefficient analysis and explains well recent experimental electrophoretic nuclear magnetic resonance measurements, which account for ion correlations. We extend these findings to several ionic liquid compositions. We investigate the degree of spatial ionic coordination employing single-linkage cluster analysis, unveiling asymmetrical anion-cation clusters. We formulate a way to compute the effective lithium charge and show that lithium-containing clusters carry a negative charge over a remarkably wide range of compositions and concentrations. This finding has significant implications for the overall performance of battery cells based on ionic liquid electrolytes. It also provides a rigorous prediction recipe and design protocol for optimizing transport properties in next-generation highly correlated electrolytes.
Collapse
Affiliation(s)
- Nicola Molinari
- John A. Paulson School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Jonathan P Mailoa
- Research and Technology Center , Robert Bosch LLC , Cambridge , Massachusetts 02142 , United States
| | - Boris Kozinsky
- John A. Paulson School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
- Research and Technology Center , Robert Bosch LLC , Cambridge , Massachusetts 02142 , United States
| |
Collapse
|
12
|
Zhang X, Kuroda DG. An ab initio molecular dynamics study of the solvation structure and ultrafast dynamics of lithium salts in organic carbonates: A comparison between linear and cyclic carbonates. J Chem Phys 2019; 150:184501. [DOI: 10.1063/1.5088820] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Xiaoliu Zhang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Daniel G. Kuroda
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| |
Collapse
|
13
|
Lim J, Lee KK, Liang C, Park KH, Kim M, Kwak K, Cho M. Two-Dimensional Infrared Spectroscopy and Molecular Dynamics Simulation Studies of Nonaqueous Lithium Ion Battery Electrolytes. J Phys Chem B 2019; 123:6651-6663. [DOI: 10.1021/acs.jpcb.9b02026] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Joonhyung Lim
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, Korea
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Kyung-Koo Lee
- Department of Chemistry, Kunsan National University, Kunsan, Jeonbuk 573-701, Korea
| | - Chungwen Liang
- Computational Modeling Core, Institute for Applied Life Sciences (IALS), University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Kwang-Hee Park
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, Korea
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Minjoo Kim
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, Korea
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Kyungwon Kwak
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, Korea
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, Korea
- Department of Chemistry, Korea University, Seoul 02841, Korea
| |
Collapse
|
14
|
Han S. Structure and dynamics in the lithium solvation shell of nonaqueous electrolytes. Sci Rep 2019; 9:5555. [PMID: 30944371 PMCID: PMC6447571 DOI: 10.1038/s41598-019-42050-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 03/21/2019] [Indexed: 12/19/2022] Open
Abstract
The solvation of a lithium ion has been of great importance to understand the structure and dynamics of electrolytes. In mixed electrolytes of cyclic and linear carbonates, the lithium solvation structure and the exchange dynamics of solvents strongly depend on the mixture ratio of solvents, providing a connection of the rigidity of the lithium solvation shell with the solvent composition in the shell. Here we study the dynamical properties of solvents in the solvation sheath of a lithium ion for various solvent mixture ratios via molecular dynamics simulations. Our results demonstrate that the exchange dynamics of solvents exhibits a non-monotonic behavior with a change in the mixture ratio, which keeps preserved on both short and long time scales. As the fraction of cyclic carbonate increases, we find that the structural properties of cyclic and linear carbonates binding to a lithium ion show different responses to a change in the fraction. Furthermore, we find that the rotational dynamics of cyclic carbonate is relatively insensitive to the mixture ratio in contrast to the rotational dynamics of linear carbonate. Our results further present that an anion shows different properties in structure and dynamics from solvents upon changing the mixture ratio of solvents.
Collapse
Affiliation(s)
- Sungho Han
- CAE Group, AMD Lab, AI&SW Research Center, Samsung Advanced Institute of Technology, Suwon, Gyeonggi, 16678, Korea.
| |
Collapse
|
15
|
Zhang Y, Su M, Yu X, Zhou Y, Wang J, Cao R, Xu W, Wang C, Baer DR, Borodin O, Xu K, Wang Y, Wang XL, Xu Z, Wang F, Zhu Z. Investigation of Ion-Solvent Interactions in Nonaqueous Electrolytes Using in Situ Liquid SIMS. Anal Chem 2018; 90:3341-3348. [PMID: 29405699 DOI: 10.1021/acs.analchem.7b04921] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Ion-solvent interactions in nonaqueous electrolytes are of fundamental interest and practical importance, yet debates regarding ion preferential solvation and coordination numbers persist. In this work, in situ liquid SIMS was used to examine ion-solvent interactions in three representative electrolytes, i.e., lithium hexafluorophosphate (LiPF6) at 1.0 M in ethylene carbonate (EC)-dimethyl carbonate (DMC) and lithium bis(fluorosulfonyl)imide (LiFSI) at both low (1.0 M) and high (4.0 M) concentrations in 1,2-dimethoxyethane (DME). In the positive ion mode, solid molecular evidence strongly supports the preferential solvation of Li+ by EC. Besides, from the negative spectra, we also found that PF6- forms association with EC, which has been neglected by previous studies due to the relatively weak interaction. In both LiFSI in DME electrolytes, however, no evidence shows that FSI- is associated with DME. Furthermore, strong salt ion cluster signals were observed in the 1.0 M LiPF6 in EC-DMC electrolyte, suggesting that a significant amount of Li+ ions stay in the vicinity of anions. In sharp comparison, weak ion cluster signals were detected in dilute LiFSI in DME electrolyte, suggesting most ions are well separated, in agreement with our molecular dynamics simulation results. These findings indicate that with virtues of little bias on detecting positive and negative ions and the capability of directly analyzing concentrated electrolytes, in situ liquid SIMS is a powerful tool that can provide key evidence for improved understanding on the ion-solvent interactions in nonaqueous electrolytes. Therefore, we anticipate wide applications of in situ liquid SIMS on investigations of various ion-solvent interactions in the near future.
Collapse
Affiliation(s)
- Yanyan Zhang
- Beijing National Laboratory for Molecular Sciences, National Centre for Mass Spectrometry in Beijing, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Mao Su
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China.,CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics , Chinese Academy of Sciences , 55 East Zhongguancun Road , P.O. Box 2735, Beijing 100190 , P. R. China
| | - Xiaofei Yu
- School of Physics, State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation (MOE) , Shandong University , Jinan , 250100 , P. R. China
| | - Yufan Zhou
- School of Physics, State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation (MOE) , Shandong University , Jinan , 250100 , P. R. China
| | | | | | | | | | | | - Oleg Borodin
- Electrochemistry Branch, Power and Energy Division, Sensor and Electron Devices Directorate , U.S. Army Research Laboratory , Adelphi , Maryland 20783 , United States
| | - Kang Xu
- Electrochemistry Branch, Power and Energy Division, Sensor and Electron Devices Directorate , U.S. Army Research Laboratory , Adelphi , Maryland 20783 , United States
| | - Yanting Wang
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China.,CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics , Chinese Academy of Sciences , 55 East Zhongguancun Road , P.O. Box 2735, Beijing 100190 , P. R. China
| | - Xue-Lin Wang
- School of Physics, State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation (MOE) , Shandong University , Jinan , 250100 , P. R. China
| | | | - Fuyi Wang
- Beijing National Laboratory for Molecular Sciences, National Centre for Mass Spectrometry in Beijing, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | | |
Collapse
|
16
|
Shim Y. Computer simulation study of the solvation of lithium ions in ternary mixed carbonate electrolytes: free energetics, dynamics, and ion transport. Phys Chem Chem Phys 2018; 20:28649-28657. [DOI: 10.1039/c8cp05190a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ternary mixed carbonate electrolyte composed of ethylmethyl carbonate, dimethyl carbonate, ethylene carbonate, and Li+PF6− salt.
Collapse
Affiliation(s)
- Youngseon Shim
- CAE Group, Platform Technology Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics
- Suwon
- Korea
| |
Collapse
|
17
|
Fulfer KD, Kuroda DG. Ion speciation of lithium hexafluorophosphate in dimethyl carbonate solutions: an infrared spectroscopy study. Phys Chem Chem Phys 2018; 20:22710-22718. [DOI: 10.1039/c8cp03315c] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The speciation of lithium hexafluorophosphate (LiPF6) in dimethyl carbonate as function of the concentration is studied via IR spectroscopy and DFT computations.
Collapse
|
18
|
Zhang B, Li Y, Hou B. FTIR spectroscopic study of Li+ solvation in the solutions of LiBF4 in propylene carbonate, dimethyl sulfoxide, and their mixtures. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2017. [DOI: 10.1134/s003602441707007x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
19
|
Han S. A salient effect of density on the dynamics of nonaqueous electrolytes. Sci Rep 2017; 7:46718. [PMID: 28436475 PMCID: PMC5402255 DOI: 10.1038/srep46718] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 03/23/2017] [Indexed: 11/09/2022] Open
Abstract
The mobility and solvation of lithium ions in electrolytes are crucial for the performance and safety of lithium ion batteries. It has been known that a single type of solvent cannot satisfy the requirements of both mobility and solvation simultaneously for electrolytes. Therefore, complex solvent mixtures have been used to optimize both properties. Here we present the effects of density on the dynamics and solvation of organic liquid electrolytes via extensive molecular dynamics simulations. Our study finds that a small variation in density can induce a significant effect on the mobility of electrolytes but does not influence the solvation structure of a lithium ion. It turns out that an adjustment of the density of electrolytes could provide a more effective way to enhance mobility than a control of the solvent mixture ratio of electrolytes. Our study reveals that the density change of electrolytes mainly affects the residence time of solvents in the first solvation shell of a lithium ion rather than the structural change of the solvation sheath. Finally, our results suggest an intriguing point for understanding and designing electrolytes of lithium ion batteries for better performance and safety.
Collapse
Affiliation(s)
- Sungho Han
- CAE Group, Platform Technology Lab, Samsung Advanced Institute of Technology, Suwon, Gyeonggi 16678, Korea
| |
Collapse
|
20
|
Fulfer KD, Kuroda DG. A comparison of the solvation structure and dynamics of the lithium ion in linear organic carbonates with different alkyl chain lengths. Phys Chem Chem Phys 2017; 19:25140-25150. [DOI: 10.1039/c7cp05096h] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The structure and dynamics of electrolytes composed of lithium hexafluorophosphate (LiPF6) in dimethyl carbonate, ethyl methyl carbonate, and diethyl carbonate were investigated using a combination of linear and two-dimensional infrared spectroscopies.
Collapse
Affiliation(s)
- K. D. Fulfer
- Department of Chemistry
- Louisiana State University
- Baton Rouge
- USA
| | - D. G. Kuroda
- Department of Chemistry
- Louisiana State University
- Baton Rouge
- USA
| |
Collapse
|
21
|
Ebadi M, Brandell D, Araujo CM. Electrolyte decomposition on Li-metal surfaces from first-principles theory. J Chem Phys 2016; 145:204701. [DOI: 10.1063/1.4967810] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
|
22
|
Cao Z, Voth GA. The multiscale coarse-graining method. XI. Accurate interactions based on the centers of charge of coarse-grained sites. J Chem Phys 2016; 143:243116. [PMID: 26723601 DOI: 10.1063/1.4933249] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
It is essential to be able to systematically construct coarse-grained (CG) models that can efficiently and accurately reproduce key properties of higher-resolution models such as all-atom. To fulfill this goal, a mapping operator is needed to transform the higher-resolution configuration to a CG configuration. Certain mapping operators, however, may lose information related to the underlying electrostatic properties. In this paper, a new mapping operator based on the centers of charge of CG sites is proposed to address this issue. Four example systems are chosen to demonstrate this concept. Within the multiscale coarse-graining framework, CG models that use this mapping operator are found to better reproduce the structural correlations of atomistic models. The present work also demonstrates the flexibility of the mapping operator and the robustness of the force matching method. For instance, important functional groups can be isolated and emphasized in the CG model.
Collapse
Affiliation(s)
- Zhen Cao
- Department of Chemistry, James Franck Institute, Institute for Biophysical Dynamics, and Computation Institute, The University of Chicago, 5735 S Ellis Ave., Chicago, Illinois 60637, USA
| | - Gregory A Voth
- Department of Chemistry, James Franck Institute, Institute for Biophysical Dynamics, and Computation Institute, The University of Chicago, 5735 S Ellis Ave., Chicago, Illinois 60637, USA
| |
Collapse
|
23
|
Chernozhuk TV, Sherstyuk YS, Novikov DO, Kalugin ON. Association constants in solutions of lithium salts in butyrolactone and a mixture of propylene carbonate with 1,2-dimethoxyethane (1 : 1), according to conductometric data. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2016. [DOI: 10.1134/s0036024416020096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
24
|
Schmid MJ, Xu J, Lindner J, Novák P, Schuster R. Concentration Effects on the Entropy of Electrochemical Lithium Deposition: Implications for Li+ Solvation. J Phys Chem B 2015; 119:13385-90. [DOI: 10.1021/acs.jpcb.5b07670] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthias J. Schmid
- Institut
für Physikalische Chemie, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, D-76131 Karlsruhe, Germany
| | - Junjie Xu
- Institut
für Physikalische Chemie, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, D-76131 Karlsruhe, Germany
| | - Jeannette Lindner
- Institut
für Physikalische Chemie, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, D-76131 Karlsruhe, Germany
| | - Petr Novák
- Electrochemistry
Laboratory, Paul Scherrer Institut, CH-5232 Villigen
PSI, Switzerland
| | - Rolf Schuster
- Institut
für Physikalische Chemie, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, D-76131 Karlsruhe, Germany
| |
Collapse
|
25
|
|
26
|
Chaban V. Solvation of the fluorine containing anions and their lithium salts in propylene carbonate and dimethoxyethane. J Mol Model 2015; 21:172. [PMID: 26067106 DOI: 10.1007/s00894-015-2717-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 06/01/2015] [Indexed: 11/28/2022]
Abstract
Electrolyte solutions based on the propylene carbonate (PC)-dimethoxyethane (DME) mixtures are of significant importance and urgency due to emergence of lithium-ion batteries. Solvation and coordination of the lithium cation in these systems have been recently attended in detail. However, analogous information concerning anions (tetrafluoroborate, hexafluorophosphate) is still missed. This work reports PM7-MD simulations (electronic-structure level of description) to include finite-temperature effects on the anion solvation regularities in the PC-DME mixture. The reported result evidences that the anions appear weakly solvated. This observation is linked to the absence of suitable coordination sites in the solvent molecules. In the concentrated electrolyte solutions, both BF4(-) and PF6(-) prefer to exist as neutral ion pairs (LiBF4, LiPF6).
Collapse
Affiliation(s)
- Vitaly Chaban
- Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo, 12231-280, São José dos Campos, SP, Brazil,
| |
Collapse
|
27
|
Affiliation(s)
- Kang Xu
- Electrochemistry Branch,
Energy and Power Division, Sensor and Electronics Directorate, U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783-1197, United States
| |
Collapse
|
28
|
Zhang B, Zhou Y, Li X, Wang J, Li G, Yun Q, Wang X. Li(+)-molecule interactions of lithium tetrafluoroborate in propylene carbonate + N,N-dimethylformamide mixtures: an FTIR spectroscopic study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 124:40-45. [PMID: 24463238 DOI: 10.1016/j.saa.2014.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 12/30/2013] [Accepted: 01/03/2014] [Indexed: 06/03/2023]
Abstract
FTIR (Fourier transformed infrared) spectra have been collected and analyzed for solutions of lithium tetrafluoroborate in propylene carbonate (PC), N,N-dimethylformamide (DMF), and PC+DMF mixtures. The band splitting and symmetric ring deformation for PC and O=C-N deformation for DMF suggest that there is a strong interaction between lithium cations and solvent molecules. The solvent molecules have been assigned to two types, the free and complexed molecules. By a comparison of the intensity for the corresponding bands, it has been concluded that Li(+) cations are preferentially solvated by DMF molecules in the LiBF4/PC+DMF solutions. This has been explained by the difference in values of donor number (DN).
Collapse
Affiliation(s)
- Binbin Zhang
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuan Zhou
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China.
| | - Xiang Li
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China.
| | - Jingying Wang
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Gang Li
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Yun
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiufang Wang
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China
| |
Collapse
|
29
|
Zhang B, Zhou Y, Li X, Ren X, Nian H, Shen Y, Yun Q. FTIR spectroscopic studies of lithium tetrafluoroborate in propylene carbonate+diethyl carbonate mixtures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:59-64. [PMID: 24295777 DOI: 10.1016/j.saa.2013.11.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 11/09/2013] [Accepted: 11/11/2013] [Indexed: 06/02/2023]
Abstract
FTIR (Fourier transformed infrared) spectra have been collected and analyzed for solutions of lithium tetrafluoroborate in propylene carbonate (PC), diethyl carbonate (DEC), and PC+DEC mixtures. It has been shown that the carbonyl stretch bands of PC and DEC, the ring of PC and the ether oxygen stretch bands of DEC are all very sensitive to the interaction between Li(+) and the solvent molecules. New shoulders appear and the original bands split with the addition of LiBF4, indicating that a strong interaction between Li(+) and molecules of PC and DEC exists through the oxygen group of C=O and ring of PC and both C=O oxygen and ether oxygen atoms of DEC. In addition, no preferential solvation of Li(+) in LiBF4/PC+DEC solutions was detected.
Collapse
Affiliation(s)
- Binbin Zhang
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuan Zhou
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China.
| | - Xiang Li
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiufeng Ren
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongen Nian
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yue Shen
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China
| | - Qiang Yun
- Key Laboratory of Salt Lake Resources and Chemistry of Chinese Academy of Sciences, Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|