Measurement and Correlation of the Electrical Conductivity of the Ionic Liquid [BMIM][TFSI] in Binary Organic Solvents

Fu, Yanli; Cui, Xianbao; Zhang, Ying; Feng, Tingting; He, Jie; Zhang, Xuemei; Bai, Xue; Cheng, Qinglong

doi:10.1021/acs.jced.7b00646

Cited by 27 publications

(16 citation statements)

References 46 publications

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“…Fu et al 27 proposed a seven-parameter correlation model for the conductivity of ionic liquids in binary organic solvents systems, as shown in eq 15 . where B 1 – B 7 are empirical parameters, and x ′ is related to the solvent composition.…”

Section: Resultsmentioning

confidence: 99%

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Experimental and Modeling of Conductivity for Electrolyte Solution Systems

et al. 2020

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Studying the concentration and temperature dependence of the conductivity of electrolyte solution is of great significance for the evaluation and improvement of the performance of the electrochemical system. In this paper, based on the influence of the number of free ions and ion mobility on the conductivity, a semiempirical conductivity model with five parameters was proposed to correlate the conductivity, concentration and temperature data of electrolyte solutions at medium and high concentrations. The conductivities of NaCl and CaCl 2 in propylene carbonate–H 2 O binary solvents were measured at temperatures varying from 283.15 to 333.15 K. The validity of the model was verified by the experimental data of this paper and the conductivity, concentration, and temperature data of 28 electrolyte solution systems in the literature. The electrolyte solutions investigated in this paper included binary organic solvent systems, pure organic solvent systems, and aqueous solution systems. The results showed that the proposed model can fit the experimental data well for both pure solvent and mixed solvents systems, which is of great value to practical engineering applications.

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Section: Resultsmentioning

confidence: 99%

“… 26 Fu et al proposed a seven-parameter quasi-Arrhenius model, which well fitted the conductivity of ionic liquids in mixed organic solvents systems, but the adoption of seven parameters increased the difficulty in solving the problem. 27 …”

Section: Introductionmentioning

confidence: 99%

Experimental and Modeling of Conductivity for Electrolyte Solution Systems

et al. 2020

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“…To overcome these disadvantages, some functional groups are introduced to the cations of ILs to improvet he properties of ILs, [7][8][9] and some appropriate organic additives are mixed with ILs to reduce its viscosity,r esulting in better performance, but without compromising the safety. [10,11] Generally,a mong all the functional groups, the highly flexible ether group can markedly reduce viscosity and providec oordinationa ctive sites for Li-ion which can accelerate the Li-ion transport. [12][13][14] According the report of Fang et al, [15] the high asymmetry of the ether functionalized cations can be introduced to guanidiniumI Ls, could make it with a lower viscosity,f acilitatet he formation of passivity layer and contributet oe nhancee lectrochemical stability for LIBs.…”

Section: Introductionmentioning

confidence: 99%

“…However, this class of ILs is generally suffered from low ionic conductivity and high viscosity, which hinder them to be used in practice. To overcome these disadvantages, some functional groups are introduced to the cations of ILs to improve the properties of ILs, and some appropriate organic additives are mixed with ILs to reduce its viscosity, resulting in better performance, but without compromising the safety . Generally, among all the functional groups, the highly flexible ether group can markedly reduce viscosity and provide coordination active sites for Li‐ion which can accelerate the Li‐ion transport .…”

Section: Introductionmentioning

confidence: 99%

Rational Design of an Ionic Liquid‐Based Electrolyte with High Ionic Conductivity Towards Safe Lithium/Lithium‐Ion Batteries

Zhang

Jiang

et al. 2019

Chemistry An Asian Journal

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It is av ery urgenta nd important task to improve the safety and high-temperature performance of lithium/lithium-ion batteries (LIBs). Here, an ovel ionic liquid, 1-(2-ethoxyethyl)-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (PYR 1(2o2) TFSI), was designed and synthesized, and then mixed with dimethyl carbonate (DMC) as appropriate solvent and LiTFSI lithium salt to produce an electrolyte with high ionic conductivity for safe LIBs. Various characterizations and tests show that the highlyf lexible ether group could markedly reduce the viscosity and provide coordination sites for Li-ion, and the DMC could reducet he viscosity and effectively enhance the Li-ion transport rate and transferencen umber.T he electrolyte exhibits excellent electrochemical performance in Li/LiFeO 4 cells at room temperature as well as at ah igh temperature of 60 8C. More importantly,w ith the addition of DMC, the IL-based electrolyte remains nonflammable and appropriate DMC can effectively inhibit the growth of lithium dendrites.O ur presentw ork may provide an attractive and promising strategy for high performance and safety of both lithiumand lithium-ion batteries.

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“…The drawbacks of ILs are the high viscosities and moderate conductivities, that can be adjusted by mixing with molecular liquids. This was found to cause a significant decrease of viscosity and a significant enhancement in the electrical conductivity, especially at some composition of the mixtures [5][6][7][8][9][10][11][12][13][14].…”

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confidence: 99%

Electrical Conductivities and Interactions in Binary Mixtures of Imidazolium-Based Ionic Liquids with Acetonitrile and Dimethyl Sulfoxide

Ciocîrlan¹,

Stefaniu²

2020

Rev. Chim.

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This paper reports experimental electrical conductivities data of eight binary systems of four ionic liquids: 1-butyl-3-methylimidazolium tetrafluoroborate, [Bmim][BF4], 1-hexyl-3-methylimidazolium tetrafluoroborate, [Hmim][BF4], 1-butyl-3-methylimidazolium hexafluorophosphate, [Bmim][PF6] and 1-butyl-2,3-dimethyl-imidazolium tetrafluoroborate, [Bmmim][BF4] with the organic solvents dimethyl sulfoxide (DMSO) and acetonitrile (ACN) at atmospheric pressure and temperatures from 298.15 to 328.15 K. It was found that conductivities in the investigated ionic liquids follow the order: [Bmim][BF4] ] [Bmim][PF6] ][Bmmim][BF4] ] [Hmim][BF4]. Experimental results demonstrate that the binary mixtures possess higher electrical conductivity compared with pure components. Electrical conductivity data were correlated using Casteel�Amis and Arrhenius equations. The molar conductivity was derived from experimental data and fitted to Walden rule. The influence of the cation structure and anion type on the conductivity was discussed, which help understanding the intermolecular interactions in the binary systems. A deeper understanding of the transport behavior of ILs is given by means of density functional theory calculations (DFT)

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Measurement and Correlation of the Electrical Conductivity of the Ionic Liquid [BMIM][TFSI] in Binary Organic Solvents

Cited by 27 publications

References 46 publications

Experimental and Modeling of Conductivity for Electrolyte Solution Systems

Experimental and Modeling of Conductivity for Electrolyte Solution Systems

Rational Design of an Ionic Liquid‐Based Electrolyte with High Ionic Conductivity Towards Safe Lithium/Lithium‐Ion Batteries

Electrical Conductivities and Interactions in Binary Mixtures of Imidazolium-Based Ionic Liquids with Acetonitrile and Dimethyl Sulfoxide

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