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Bouarab AF, Harvey JP, Robelin C. Viscosity models for ionic liquids and their mixtures. Phys Chem Chem Phys 2021; 23:733-752. [DOI: 10.1039/d0cp05787h] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Review of principles and limitations of viscosity models for ionic liquids and their mixtures focusing on the use of inappropriate mixing rules for molten salts.
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Affiliation(s)
- Anya F. Bouarab
- Centre for Research in Computational Thermochemistry (CRCT)
- Department of Chemical Engineering
- Polytechnique Montréal
- Montréal
- Canada
| | - Jean-Philippe Harvey
- Centre for Research in Computational Thermochemistry (CRCT)
- Department of Chemical Engineering
- Polytechnique Montréal
- Montréal
- Canada
| | - Christian Robelin
- Centre for Research in Computational Thermochemistry (CRCT)
- Department of Chemical Engineering
- Polytechnique Montréal
- Montréal
- Canada
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Kunze M, Karatas Y, Wiemhöfer HD, Schönhoff M. Correlations of Ion Motion and Chain Motion in Salt-in-Polysiloxane-g-oligoether Electrolytes. Macromolecules 2012. [DOI: 10.1021/ma3014405] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Miriam Kunze
- Institute of Physical Chemistry
and SFB 458, University of Münster, Corrensstrasse 28/30, 48149 Münster, Germany
| | - Yunus Karatas
- Institute of Inorganic and Analytical
Chemistry and SFB 458, University of Münster, Corrensstrasse 28/30, 48149 Münster, Germany
| | - Hans-Dieter Wiemhöfer
- Institute of Inorganic and Analytical
Chemistry and SFB 458, University of Münster, Corrensstrasse 28/30, 48149 Münster, Germany
| | - Monika Schönhoff
- Institute of Physical Chemistry
and SFB 458, University of Münster, Corrensstrasse 28/30, 48149 Münster, Germany
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Funke K, Banhatti RD, Laughman DM, Badr LG, Mutke M, Santic A, Wrobel W, Fellberg EM, Biermann C. First and Second Universalities: Expeditions Towards and Beyond. ACTA ACUST UNITED AC 2010. [DOI: 10.1524/zpch.2010.0025] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Understanding the mechanisms of translational and localised ionic movements in disordered materials has seen intense activity spanning several decades. This article attempts to convey a concise overview of our contribution to this field over the period from 2005 to 2010 and to place it in its broad context.
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Affiliation(s)
| | - Radha D. Banhatti
- University of Münster, Department of Physical Chemistry, Münster, Deutschland
| | - D. M. Laughman
- University of Muenster, Institute of Physical Chemistry, Muenster, Deutschland
| | - L. G. Badr
- University of Muenster, Institute of Physical Chemistry, Muenster
| | | | | | | | | | - C. Biermann
- University of Muenster, Institute of Physical Chemistry, Münster, Deutschland
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Karatas Y, Banhatti RD, Kaskhedikar N, Burjanadze M, Funke K, Wiemhöfer HD. Synthesis and Modeling of Polysiloxane-Based Salt-in-Polymer Electrolytes with Various Additives. J Phys Chem B 2009; 113:15473-84. [DOI: 10.1021/jp907832q] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Y. Karatas
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany, Institute of Physical Chemistry, University of Münster, Germany, Department of Chemistry, Ahi Evran University, Turkey, Sonderforschungsbereich 458, University of Münster, Germany, and International Graduate School of Chemistry (GSC-MS), Germany
| | - Radha D. Banhatti
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany, Institute of Physical Chemistry, University of Münster, Germany, Department of Chemistry, Ahi Evran University, Turkey, Sonderforschungsbereich 458, University of Münster, Germany, and International Graduate School of Chemistry (GSC-MS), Germany
| | - N. Kaskhedikar
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany, Institute of Physical Chemistry, University of Münster, Germany, Department of Chemistry, Ahi Evran University, Turkey, Sonderforschungsbereich 458, University of Münster, Germany, and International Graduate School of Chemistry (GSC-MS), Germany
| | - M. Burjanadze
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany, Institute of Physical Chemistry, University of Münster, Germany, Department of Chemistry, Ahi Evran University, Turkey, Sonderforschungsbereich 458, University of Münster, Germany, and International Graduate School of Chemistry (GSC-MS), Germany
| | - K. Funke
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany, Institute of Physical Chemistry, University of Münster, Germany, Department of Chemistry, Ahi Evran University, Turkey, Sonderforschungsbereich 458, University of Münster, Germany, and International Graduate School of Chemistry (GSC-MS), Germany
| | - Hans-D. Wiemhöfer
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany, Institute of Physical Chemistry, University of Münster, Germany, Department of Chemistry, Ahi Evran University, Turkey, Sonderforschungsbereich 458, University of Münster, Germany, and International Graduate School of Chemistry (GSC-MS), Germany
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Santić A, Wrobel W, Mutke M, Banhatti RD, Funke K. Frequency-dependent fluidity and conductivity of an ionic liquid. Phys Chem Chem Phys 2009; 11:5930-4. [PMID: 19588015 DOI: 10.1039/b904186a] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The frequency- and temperature-dependent shear fluidity, f(nu,T), of the ionic liquid [BMIm]BF(4) is presented and compared with its ionic conductivity, sigma(nu,T). [BMIm]BF(4) is short for 1-butyl-3-methyl-imidazolium tetrafluoroborate. Its DC fluidity, f(DC)(T), and DC conductivity, sigma(DC)(T), are non-Arrhenius and superimpose in an Arrhenius-type representation if the respective inverse temperature axes are made to differ by a small amount, Delta = (1/T(multiply sign in circle)- 1/T) > 0. The observed superposition suggests that f(nu,T) should display a frequency dependence similar to sigma(nu,T(multiply sign in circle)). We have therefore measured f(nu,T) of [BMIm]BF(4) over five decades of frequency at different temperatures. The spectra thus obtained corroborate our expectations. We model our experimental results in terms of the MIGRATION concept and arrive at the conclusion that f(nu,T) and sigma(nu,T(multiply sign in circle)) are Fourier transforms of quite similar time correlation functions.
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Affiliation(s)
- Ana Santić
- Institute of Physical Chemistry and Sonderforschungsbereich 458, University of Münster, Corrensstrasse 30, D-48149 Münster, Germany
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Funke K, Singh P, Banhatti RD. Conductivity dispersion in supercooled calcium potassium nitrate: caged ionic motion viewed as part of standard behaviour. Phys Chem Chem Phys 2007; 9:5582-90. [PMID: 17957315 DOI: 10.1039/b618788a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conductivity spectra of ionic materials with disordered structures are usually thought to consist of several parts, i.e., the DC conductivity, a power-law component, a nearly-constant-loss feature (if identified) and the (far-)infrared conductivity caused by vibrational motion. Such a decomposition may, however, easily lead to a misinterpretation of the underlying dynamics. Here, we discuss broad-band conductivity data of the supercooled glass-forming melt calcium potassium nitrate, of composition 0.4 Ca(NO(3))(2).0.6 KNO(3), often abbreviated as CKN. Data have been taken at frequencies up to the far infrared. We show that the frequency-dependent conductivity is very well reproduced by a superposition of only two components. One of them is due to vibrations, the other is caused by displacements of the mobile ions. The latter component, which does not follow a power law, is described in terms of a physical model called the MIGRATION concept. This model treatment has been found to apply in many solid electrolytes as well and is, therefore, considered to provide a "standard" formulation of the ion dynamics. The gradual transition from a correlated forward-backward ("caged") ionic motion to a stepwise translational motion may be regarded as the main feature of the MIGRATION concept.
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Affiliation(s)
- Klaus Funke
- Institute of Physical Chemistry and Sonderforschungsbereich 458, University of Münster, Corrensstrasse 30, D - 48149, Münster, Germany.
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