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Zheng Y, Ji H, Qian T, Li S, Liu J, Zhou J, Wang Z, Li Y, Yan C. Achieving Rapid Ultralow-Temperature Ion Transfer via Constructing Lithium-Anion Nanometric Aggregates to Eliminate Li +-Dipole Interactions. NANO LETTERS 2023; 23:3181-3188. [PMID: 37036714 DOI: 10.1021/acs.nanolett.2c04876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Sluggish desolvation in extremely cold environments caused by strong Li+-dipole interactions is a key inducement for the capacity decline of a battery. Although the Li+-dipole interaction is reduced by increasing the electrolyte concentration, its high viscosity inevitably limits ion transfer at low temperatures. Herein, Li+-dipole interactions were eliminated to accelerate the migration rate of ions in electrolytes and at the electrode interface via designing Li+-anion nanometric aggregates (LA-nAGGs) in low-concentration electrolytes. Li+ coordinated by TFSI- and FSI- anions instead of a donor solvent promotes the formation of an inorganic-rich interfacial layer and facilitates Li+ transfer. Consequently, the LA-nAGG-type electrolyte demonstrated a high ionic conductivity (0.6 mS cm-1) at -70 °C and a low activation energy of charge transfer (38.24 kJ mol-1), enabling Li||NiFe-Prussian blue derivative cells to deliver ∼83.1% of their room-temperature capacity at -60 °C. This work provides an advanced strategy for the development of low-temperature electrolytes.
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Affiliation(s)
- Yiwei Zheng
- Key Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry, College of Energy, Soochow University, Suzhou 215006, People's Republic of China
| | - Haoqing Ji
- Key Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry, College of Energy, Soochow University, Suzhou 215006, People's Republic of China
| | - Tao Qian
- College of Chemistry and Chemical Engineering, Nantong University, Seyuan 9, Nantong 226000, People's Republic of China
- Light Industry Institute of Electrochemical Power Sources, Suzhou 215600, People's Republic of China
| | - Sijie Li
- Key Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry, College of Energy, Soochow University, Suzhou 215006, People's Republic of China
| | - Jie Liu
- College of Chemistry and Chemical Engineering, Nantong University, Seyuan 9, Nantong 226000, People's Republic of China
| | - Jinqiu Zhou
- College of Chemistry and Chemical Engineering, Nantong University, Seyuan 9, Nantong 226000, People's Republic of China
| | - Zhenkang Wang
- Key Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry, College of Energy, Soochow University, Suzhou 215006, People's Republic of China
| | - Yufei Li
- Pinghu Institute of Advanced Materials, Zhejiang University of Technology, Pinghu 314200, People's Republic of China
| | - Chenglin Yan
- Key Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry, College of Energy, Soochow University, Suzhou 215006, People's Republic of China
- Light Industry Institute of Electrochemical Power Sources, Suzhou 215600, People's Republic of China
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Shah S, Pietsch T, Ruck M. N-heterocyclic carbene-mediated oxidation of copper(I) in an imidazolium ionic liquid. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2023. [DOI: 10.1515/znb-2022-0305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Abstract
The aerobic oxidation of copper(I) to copper(II) was studied in the ionic liquid (IL) 1-n-butyl-3-methylimidazolium acetate [BMIm][OAc]. Temperatures above 100 °C promote the deprotonation of the C2 atom of the imidazolium ring and the dissolution of CuCl. 1H and 13C NMR spectra indicate the formation of the N-heterocyclic carbene (NHC) complex [NHC] CuICl under inert conditions. Upon aerobic oxidation, air-stable blue-green crystals of [BMIm]2[CuII
2(OAc)4Cl2] precipitate in high yield and the NHC is recovered. X-ray diffraction on a single-crystal of the complex salt revealed a monoclinic structure with space group P21/n. The centrosymmetric dinuclear acetate complex [Cu2(OAc)4Cl2]2– has the paddle-wheel motif and is weakly paramagnetic.
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Affiliation(s)
- Sameera Shah
- Fakultät Chemie und Lebensmittelchemie , Technische Universität Dresden , 01062 Dresden , Germany
- Max-Planck-Institut für Chemische Physik fester Stoffe , Nöthnitzer Straße 40, 01187 Dresden , Germany
| | - Tobias Pietsch
- Fakultät Chemie und Lebensmittelchemie , Technische Universität Dresden , 01062 Dresden , Germany
- Max-Planck-Institut für Chemische Physik fester Stoffe , Nöthnitzer Straße 40, 01187 Dresden , Germany
| | - Michael Ruck
- Fakultät Chemie und Lebensmittelchemie , Technische Universität Dresden , 01062 Dresden , Germany
- Max-Planck-Institut für Chemische Physik fester Stoffe , Nöthnitzer Straße 40, 01187 Dresden , Germany
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Correa E, Montaño D, Restrepo A. Cation ⋯anion bonding interactions in 1–Ethyl–3–Methylimidazolium based ionic liquids. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bhowmick S, Filippov A, Khan IA, Shah FU. Physical and electrochemical properties of new structurally flexible imidazolium phosphate ionic liquids. Phys Chem Chem Phys 2022; 24:23289-23300. [PMID: 36156000 DOI: 10.1039/d2cp03022e] [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
New structurally flexible 1-methyl- and 1,2-dimethyl-imidazolium phosphate ionic liquids (ILs) bearing oligoethers have been synthesized and thoroughly characterized. These novel ILs revealed high thermal stabilities, low glass transitions, high conductivity and wide electrochemical stability windows up to 6 V. Both the cations and anions of 1-methyl-imidazolium ILs diffuse faster than the ions of 1,2-dimethyl-imidazolium ILs, as determined by pulsed field gradient nuclear magnetic resonance (PFG-NMR). The 1-methyl-imidazolium phosphate ILs showed relatively higher ionic conductivities and ion diffusivity as compared with the 1,2-dimethyl-imidazolium phosphate ILs. As expected, the diffusivity of all the ions increases with an increase in the temperature. The 1-methyl-imidazolium phosphate ILs formed hydrogen bonds with the phosphate anions, the strength of which is decreased with increasing temperature, as confirmed by variable temperature 1H and 31P NMR spectroscopy. One of the representative IL, [EmDMIm][DEEP], presented promising elevated temperature performance as an electrolyte in a supercapacitor composed of multiwall carbon nanotubes and activated charcoal (MWCNT/AC) composite electrodes.
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Affiliation(s)
- Sourav Bhowmick
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
| | - Andrei Filippov
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
| | - Inayat Ali Khan
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
| | - Faiz Ullah Shah
- Chemistry of Interfaces, Luleå University of Technology, SE-971 87 Luleå, Sweden.
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Zhao W, Sun T, Zheng Y, Zhang Q, Huang A, Wang L, Jiang W. Tailoring Intermolecular Interactions Towards High-Performance Thermoelectric Ionogels at Low Humidity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201075. [PMID: 35478492 PMCID: PMC9284173 DOI: 10.1002/advs.202201075] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Indexed: 05/10/2023]
Abstract
Development of ionic thermoelectric (iTE) materials is of immense interest for efficient heat-to-electricity conversion due to their giant ionic Seebeck coefficient (Si ), but challenges remain in terms of relatively small Si at low humidity, poor stretchability, and ambiguous interaction mechanism in ionogels. Herein, a novel ionogel is reported consisting of polyethylene oxide (PEO), polyethylene oxide-polypropylene oxide-polyethylene oxide (P123), and 1-ethyl-3-methylimidazolium acetate (Emim:OAC). By delicately designing the interactions between ions and polymers, the migration of anions is restricted due to their strong binding with the hydroxyl groups of polymers, while the transport of cations is facilitated through segmental motions due to the increased amorphous regions, thereby leading to enlarged diffusion difference between the cations and anions. Moreover, the plasticizing effect of P123 and Emim:OAC can increase the elongation at break. As a consequence, the ionogel exhibits excellent properties including high Si (18 mV K-1 at relative humidity of 60%), good ionic conductivity (1.1 mS cm-1 ), superior stretchability (787%), and high stability (over 80% retention after 600 h). These findings show a promising strategy to obtain multifunctional iTE materials by engineering the intermolecular interactions and demonstrate the great potential of ionogels for harvesting low-grade heat in human-comfortable humidity environments.
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Affiliation(s)
- Wei Zhao
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Tingting Sun
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Yiwei Zheng
- Soochow Institute for Energy and Materials InnovationsCollege of EnergyKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou215006China
| | - Qihao Zhang
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research Dresden (IFW Dresden)Dresden01069Germany
| | - Aibin Huang
- State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China
| | - Lianjun Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
| | - Wan Jiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China
- Institute of Functional MaterialsDonghua UniversityShanghai201620China
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Li J, Farooq MQ, Petrich JW, Anderson JL, Smith EA. Fast and non-destructive determination of water content in ionic liquids at varying temperatures by Raman spectroscopy and multivariate regression analysis. Anal Chim Acta 2021; 1188:339164. [PMID: 34794575 DOI: 10.1016/j.aca.2021.339164] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 11/26/2022]
Abstract
Imidazolium acetate ionic liquids (ILs) have been utilized as promising solvents in many applications that involve varying water content and temperature. These experimental variables affect the anion-cation intermolecular interactions, which in turn influence the performance of the ILs in these applications. This paper shows Raman spectroscopy can be used as an operando method to measure water content in IL solvents when simultaneous temperature changes may occur. The Raman spectra of 1-alkyl-3-methylimidazolium acetate ILs (alkyl chain length n = 2, 4, 6, 8) with varying water content (from 0.028 to 0.899 water mole fraction) and temperature (from 78.1 K to 423.1 K) were measured. Increasing the water content or decreasing the temperature of the tested ILs weakens the anion-cation intermolecular interactions. The water content of these ILs can be quantified even in conditions when the temperature is changing using Raman spectroscopy combined with multivariate regression analysis, including principal component regression (PCR), partial-least-squares regression (PLSR), and artificial neural networks (ANNs). The ANN model combined with partial-least-squares (PLS) achieved the highest prediction accuracy of water content in ILs at varying temperatures (RMSECV = 0.017, R2CV = 99.1%, RMSEP = 0.019, R2P = 98.8%, RPD = 8.93). Raman spectroscopy provides a potential fast non-destructive operando method to monitor the water content of ILs even in applications when the temperature may be simultaneously altered; this information can lead to the optimized use of these ILs in many applications.
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Affiliation(s)
- Jingzhe Li
- The Ames Laboratory, U.S. Department of Energy, Ames, IA, 50011-3111, United States; Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, United States
| | - Muhammad Qamar Farooq
- The Ames Laboratory, U.S. Department of Energy, Ames, IA, 50011-3111, United States; Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, United States
| | - Jacob W Petrich
- The Ames Laboratory, U.S. Department of Energy, Ames, IA, 50011-3111, United States; Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, United States
| | - Jared L Anderson
- The Ames Laboratory, U.S. Department of Energy, Ames, IA, 50011-3111, United States; Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, United States
| | - Emily A Smith
- The Ames Laboratory, U.S. Department of Energy, Ames, IA, 50011-3111, United States; Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, United States.
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Filippov A, Alexandrov AS, Gimatdinov R, Ullah Shah F. Unusual ion transport behaviour of ethylammonium nitrate mixed with lithium nitrate. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116841] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Effect of rotating magnetic field on the diffusivity of ethylammonium nitrate ionic liquid confined between micrometer-spaced glass plates. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Gnezdilov OI, Antzutkin ON, Gimatdinov R, Filippov A. Temperature dependence of 1H NMR chemical shifts and diffusivity of confined ethylammonium nitrate ionic liquid. Magn Reson Imaging 2020; 74:84-89. [PMID: 32949669 DOI: 10.1016/j.mri.2020.09.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 09/10/2020] [Accepted: 09/10/2020] [Indexed: 11/30/2022]
Abstract
Some ionic liquids (ILs) change their dynamic properties when placed in a confinement between polar surfaces (Filippov et al., Phys. Chem. Chem. Phys. 2018, 20, 6316). The diffusivities of ions and NMR relaxation times in these ILs also reversibly change under a strong static magnetic field. The mechanisms of these phenomena are not clear, but it has been suggested that they involve modified hydrogen-bonding networks formed in these ILs in the presence of polar surfaces. To obtain a better understanding of these effects, we performed temperature-dependent measurements of chemical shifts and diffusion coefficients for ethylammonium nitrate (EAN) IL in the bulk phase (IB) and confined in layers with a thickness of ~4 μm between quartz plates unexposed (I phase) and exposed (IMF phase) to a static magnetic field of 9.4 T. It was shown that the NMR chemical shift of NH3 protons of EAN in the I phase is strongly shifted upfield, ~0.0145 ppm/K, which is due to weakening of the hydrogen-bonding network of the confined EAN. Exposure to the magnetic field leads to restitution of the hydrogen-bonding (H-bonding network). The temperature dependences of diffusion coefficients follow the order D(I) > D(IB) > D(IMF) and can be described by a Vogel-Fulcher-Tammann approach with variation of the pre-exponential factor, which is determined by the strength of the H-bonding network. Confinement of EAN between plates (IB → I) is an endothermic process, while processes occurring in a magnetic field, I → IMF and IMF → I, are exothermic and endothermic, respectively.
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Affiliation(s)
| | - Oleg N Antzutkin
- Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden; Department of Physics, Warwick University, Coventry CV4 7AL, UK
| | | | - Andrei Filippov
- Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden; Kazan State Medical University, 420012 Kazan, Russia.
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Self-diffusion in ionic liquids with nitrate anion: Effects of confinement between glass plates and static magnetic field. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113404] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Zhou Y, Liu W, Liu Y, Guan J, Yan J, Yuan JJ, Tao DJ, Song Z. Oxidative NHC catalysis for base-free synthesis of benzoxazinones and benzoazoles by thermal activated NHCs precursor ionic liquid catalyst using air as oxidant. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111013] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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