Measurements and correlation of viscosities and conductivities for the mixtures of imidazolium ionic liquids with molecular solutes

Zhu, Anlian; Wang, Jianji; Han, Lijun; Fan, Maohong

doi:10.1016/j.cej.2008.11.013

Cited by 76 publications

(62 citation statements)

References 51 publications

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“…Figure 2 shows the conductivities of the IL/acetic acid mixtures as a function of acetic acid concentration. For all seven IL mixture bases, the conductivity increases with increasing acetic acid concentration in the range of 0-6 M, which is consistent with the discussion above and with previous reports regarding diluted ILs in other solvents [25,40]. The introduction of acetic acid reduces the ion association in ILs and lowers the viscosity.…”

Section: Ionic Conductivity Of Ionic Liquid/acetic Acid Electrolytessupporting

confidence: 80%

“…Diluting ILs with solvents can separate the cations and anions in solution and reduce their aggregation, which effectively decreases the viscosity and increases the conductivity. Mixed with molecular solvents, such as acetonitrile and butanone, imidazolium-based ILs show more than an order of magnitude increase in conductivity [40]. In this study, we used anhydrous acetic acid to dilute the ILs to increase their conductivities.…”

Section: Ionic Conductivity Of Ionic Liquid/acetic Acid Electrolytesmentioning

confidence: 99%

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Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries

Meng¹,

Kim

Wong³

et al. 2017

Batteries

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Abstract:The voltage of an alkaline electrolyte-based battery is often limited by the narrow electrochemical stability window of water (1.23 V). As an alternative to water, ionic liquid (IL)-based electrolyte has been shown to exhibit excellent proton conducting properties and a wide electrochemical stability window, and can be used in proton conducting batteries. In this study, we used IL/acid mixtures to replace the 30 wt % KOH aqueous electrolyte in nickel/metal hydride (Ni/MH) batteries, and verified the proton conducting character of these mixtures through electrochemical charge/discharge experiments. Dilution of ILs with acetic acid was found to effectively increase proton conductivity. By using 2 M acetic acid in 1-ethyl-3-methylimidazolium acetate, stable charge/discharge characteristics were obtained, including low charge/discharge overpotentials, a discharge voltage plateau at~1.2 V, a specific capacity of 161.9 mAh·g −1 , and a stable cycling performance for an AB 5 metal hydride anode with a (Ni,Co,Zn)(OH) 2 cathode.

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Section: Ionic Conductivity Of Ionic Liquid/acetic Acid Electrolytessupporting

confidence: 80%

Section: Ionic Conductivity Of Ionic Liquid/acetic Acid Electrolytesmentioning

confidence: 99%

Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries

Meng¹,

Kim

Wong³

et al. 2017

Batteries

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“…[30][31][32][33][34][38][39][40] Three subgroups were considered: a) [C n mim]-[C m SO 4 ] plus ethanol with (n = 1,2; m = 1,2); [30,32,33] b) [C n mim]-[Ntf 2 ] plus ethanol with (n = 2,4,8); [34,39,40] and c) [C n mim][BF 4 ] plus ethanol with (n = 2,4,6,8). [31,38] Table 1 shows that for all subgroups except (b) the G-N mixing rule yields in general AAD and ARD values closer to zero. On the other hand the Hi rule yields larger (in modulus) average deviations and quite distinct trends.…”

Section: Il Trends: Homologous Series Of Ionic Liquids Plus a Common mentioning

confidence: 99%

“…This fact reveals the uncertainty that still affects many experimental data of ionic-liquid-based systems, namely in impurity-sensitive properties such as the viscosity. However, apart from the system under discussion, there are ten other systems which have been studied by more than one research group, namely: ([C 4 mim][PF 6 ] + methanol), [20] ([C 2 mim][C 2 SO 4 ] + ethanol), [32,35] [38,49] ([C 4 mim][BF 4 ] + dichloromethane). [38,48] In these cases the level of consistency between the calculated AAD and ARD values using any of the four rules under discussion is quite good (cf.…”

Section: Ms Effects: Different Molecular Solvents Plus a Common Ionicmentioning

confidence: 99%

“…However, apart from the system under discussion, there are ten other systems which have been studied by more than one research group, namely: ([C 4 mim][PF 6 ] + methanol), [20] ([C 2 mim][C 2 SO 4 ] + ethanol), [32,35] [38,49] ([C 4 mim][BF 4 ] + dichloromethane). [38,48] In these cases the level of consistency between the calculated AAD and ARD values using any of the four rules under discussion is quite good (cf. Table 1 and Table 2); 2) For IL:MS viscosity ratios in the range of a few hundred, the rules based on geometrical mean averages (G-N, He, K-C) tend to perform adequately in most cases; 3) The case where the G-N predictions show larger deviations-systems with DMSO as second component-are those where the molecular solvent exhibits larger dielectric constants.…”

Section: Ms Effects: Different Molecular Solvents Plus a Common Ionicmentioning

confidence: 99%

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Viscosity Mixing Rules for Binary Systems Containing One Ionic Liquid

Tariq¹,

Altamash²,

Salavera³

et al. 2013

ChemPhysChem

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In this work the applicability of four of the most commonly used viscosity mixing rules to [ionic liquid (IL)+molecular solvent (MS)] systems is assessed. More than one hundred (IL+MS) binary mixtures were selected from the literature to test the viscosity mixing rules proposed by 1) Hind (Hi), 2) Grunberg and Nissan (G-N), 3) Herric (He) and 4) Katti and Chaudhri (K-C). The analyses were performed by estimating the average (absolute or relative) deviations, AADs and ARDs, between the available experimental data and the predicted ideal mixture viscosity values obtained by means of each rule. The interaction terms corresponding to the adjustable parameters inherent to each rule were also calculated and their trends discussed.

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Electrospun carbon nanofiber web electrode: Supercapacitor behavior in various electrolytes

İşmar

Karazehir

Ateş

et al. 2017

J of Applied Polymer Sci

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Carbon nanofibers (CNFs) draw great interest due to their noticeable mechanical, electrochemical, and physical properties. In this study, polyacrylonitrile-based CNFs are obtained via electrospinning technique. Thermal oxidation and low temperature (950 8C) carbonization are applied to the electrospun web in order to achieve CNF. Through the process, Fourier transform infraredattenuated total reflectance spectroscopy and Raman spectroscopic results are investigated. The electrochemical properties of the self-standing CNF webs are examined with electrochemical impedance spectroscopy and cyclic voltammetry. In addition, various electrolyte solutions are studied to investigate the capacitive behavior of CNF webs. Electrolyte type variation has a significant effect on the capacitance results and high capacitance values are achieved in aqueous solution. According to the differing electrolyte types, specific capacitance values (C sp ) are recorded between 204 and 149 F g 21 where maximum specific capacitance is obtained in 0.5 M H 2 SO 4 as 204 F g 21 .

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Measurements and correlation of viscosities and conductivities for the mixtures of imidazolium ionic liquids with molecular solutes

Cited by 76 publications

References 51 publications

Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries

Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries

Viscosity Mixing Rules for Binary Systems Containing One Ionic Liquid

Electrospun carbon nanofiber web electrode: Supercapacitor behavior in various electrolytes

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