Measurement and correlation of electrical conductivity of ionic liquid [EMIM][DCA] in propylene carbonate and γ-butyrolactone

Xu, Li; Cui, Xianbao; Zhang, Ying; Feng, Tingting; Lin, Ruirong; Li, Xiaobing; Jie, Huimin

doi:10.1016/j.electacta.2015.06.053

Cited by 45 publications

(29 citation statements)

References 52 publications

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“…However, the overall flexibility of the polymer chain in M 40 increased due to the partial destruction of the crystallinity in host polymer. It was signified by the decrease in the viscosity of the solution and the mechanical strength of the thin film [32,33]. The result obtained is in well agreement with XRD measurements as depicted in Fig.…”

Section: Structural and Thermal Characterizationssupporting

confidence: 88%

Effects of ionic liquid on the hydroxylpropylmethyl cellulose (HPMC) solid polymer electrolyte

Chong

Liew

Numan

et al. 2016

Ionics

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Biodegradable solid polymer electrolyte (SPE) is prepared by solution-casting technique using low-cost cellulose derivative, hydroxypropylmethyl cellulose (HPMC) as a host polymer. Owing to the hydrophobic nature of this polymer, it is predicted to exhibit low ionic conductivity upon addition of magnesium trifluoro methanesulfonate (MgTf 2 ) salt. Therefore, ionic liquid (IL), 1-butyl-3-methylimidazolium trifluoro methanesulfonate (BMIMTf), is added in order to enhance its ionic conductivity. Based on the findings, the ionic conductivity at room temperature and the dielectric behaviors of the SPE complex improved upon incorporation of 40 wt.% IL. On top of that, addition of IL reduces the degree of crystallinity and the glass transition temperature (T g ) of the SPE. The conductivity-temperature plot revealed that the transportation of ions in these films obey Arrhenius theory. The interaction between SPE complex, MgTf 2 salt, and BMIMTf is investigated by means of Fourier transform infrared (FTIR) spectroscopy through the change in peak intensity around 3413, 1570, and 1060 cm −1 , which are responsible for -OH stretching band, C-C and C-N bending modes of cyclic BMIM + , and C-O-C stretching band, respectively.

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Section: Structural and Thermal Characterizationssupporting

confidence: 88%

Effects of ionic liquid on the hydroxylpropylmethyl cellulose (HPMC) solid polymer electrolyte

Chong

Liew

Numan

et al. 2016

Ionics

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“…Finally, we note that the linearity of the activation energy for molar conductivity with x IL is striking in Figure . Linear E a ( x IL ) for conductivity has also been observed for several other binary IL–molecular solvent systems ,, and for the addition of Li[NTf 2 ] into ether- and allyl-functionalized ILs . Although not a universal feature of IL–molecular solvent binary systems, a linearity of the activation energy with x IL has been observed for a large number of IL–molecular solvent binary systems in the case of fluidity .…”

Section: Conductivitymentioning

confidence: 77%

Transport Properties of the 1-Hexyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)amide–Trichloromethane Binary System: Indication of Trichloromethane Segregation

2016

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Self-diffusion coefficients and electrical conductivity were studied for the binary system 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide-trichloromethane ([C6mim][NTf2]-CHCl3) as a function of composition and temperature. Self-diffusion coefficients of cation and anion are identical for ionic liquid mole fractions xIL < 0.95. The self-diffusion coefficient of CHCl3 is consistently larger than that of the ions by a factor of 4. A double logarithmic plot for the ratio of self-diffusion coefficient and temperature versus viscosity is linear for ionic liquid mole fractions 0.1 < xIL < 0.9 indicating (a) a fractional Stokes-Einstein applies where self-diffusion is inverse proportional to some power b of viscosity (D ∼ η(-b)) and (b) single average length scales are associated with the mass transport of [C6mim][NTf2] and CHCl3. However, the obtained length scale for CHCl3 is unreasonably small, which is indicative of CHCl3 segregation. The molar conductivity displays a maximum near xIL = 0.2. Evaluation of the ionicity from molar conductivity and self-diffusion coefficients indicates a gradual speciation change from charged species to neutral species for xIL < 0.5. The temperature dependencies of self-diffusion and molar conductivity follow Arrhenius behavior. The obtained xIL-dependent activation energies are found to be linear for molar conductivity and largest for the cation and anion self-diffusion coefficients. The activation energies for the self-diffusion of CHCl3 appear to be identical with those obtained from fluidity data.

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“… 21 , 22 The former is widely used in aqueous solutions, while the latter can describe the temperature dependence more accurately for ionic liquids by introducing the concept of the glass transition temperature. 23 …”

Section: Introductionmentioning

confidence: 99%

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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Measurement and correlation of electrical conductivity of ionic liquid [EMIM][DCA] in propylene carbonate and γ-butyrolactone

Cited by 45 publications

References 52 publications

Effects of ionic liquid on the hydroxylpropylmethyl cellulose (HPMC) solid polymer electrolyte

Effects of ionic liquid on the hydroxylpropylmethyl cellulose (HPMC) solid polymer electrolyte

Transport Properties of the 1-Hexyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)amide–Trichloromethane Binary System: Indication of Trichloromethane Segregation

Experimental and Modeling of Conductivity for Electrolyte Solution Systems

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