A Method for Estimating Transport Properties of Concentrated Electrolytes from Self-Diffusion Data

2016 ◽  
Vol 163 (14) ◽  
pp. A2977-A2980 ◽  
Author(s):  
Sun Ung Kim ◽  
Venkat Srinivasan
Keyword(s):  
Transport Properties ◽  
Diffusion Data ◽  
Self Diffusion ◽  
Concentrated Electrolytes

Self-diffusion, velocity cross-correlation, distinct diffusion and resistance coefficients of the ionic liquid [BMIM][Tf2N] at high pressure

2015 ◽  
Vol 17 (37) ◽  
pp. 23977-23993 ◽  
Author(s):  
Kenneth R. Harris ◽  
Mitsuhiro Kanakubo
Keyword(s):  
High Pressure ◽  
Ionic Liquid ◽  
Transport Properties ◽  
Diffusion Coefficients ◽  
Cross Correlation ◽  
Diffusion Velocity ◽  
Self Diffusion ◽  
Scaling Parameters ◽  
Resistance Coefficients ◽  
Viscosity Dependence

Distinct diffusion coefficients for 1-alkyl-3-imidazolium [Tf2N] salts show very similar viscosity dependence; thermodynamic scaling parameters for the reduced transport properties are equal.

Combining Freezing Point Depression and Self-Diffusion Data for Characterizing Aggregation

2018 ◽  
Vol 122 (18) ◽  
pp. 4913-4921 ◽  
Author(s):  
Markus M. Hoffmann ◽  
Sarah Bothe ◽  
Torsten Gutmann ◽  
Gerd Buntkowsky
Keyword(s):  
Freezing Point ◽  
Freezing Point Depression ◽  
Diffusion Data ◽  
Self Diffusion

scholarly journals Effect of mixed anions on the transport properties and performance of an ionic liquid-based electrolyte for lithium-ion batteries

2019 ◽  
Vol 91 (8) ◽  
pp. 1361-1381 ◽  
Author(s):  
Victor Chaudoy ◽  
Johan Jacquemin ◽  
François Tran-Van ◽  
Michaël Deschamps ◽  
Fouad Ghamouss
Keyword(s):  
Transport Properties ◽  
Lithium Ion Batteries ◽  
Salt Concentration ◽  
Lithium Salt ◽  
Nuclear Overhauser Effect ◽  
Lithium Ion ◽  
Activation Energies ◽  
The Self ◽  
Self Diffusion ◽  
Wide Range

Abstract In this work, the physical, transport and electrochemical properties of various electrolytic solutions containing the 1-propyl-1-methylpyrrolidinium bis[fluorosulfonyl]imide ([C3C1pyr][FSI]) mixed with the lithium bis[(trifluoromethyl)sulfonyl]imide (Li[TFSI]) over a wide range of compositions are reported as a function of temperature at atmospheric pressure. First, the ionicity, lithium transference number, and transport properties (viscosity and conductivity) as well as the volumetric properties (density and molar volume) were determined as a function of lithium salt concentration from 293 to 343 K. Second, the self-diffusion coefficient of each ion in solution was measured by nuclear magnetic resonance (NMR) spectroscopy with pulsed field gradients (PFG). Moreover, an analysis of the collected nuclear Overhauser effect (NOE) data along with ab initio and COSMO-RS calculations was conducted to depict intra and intermolecular neighbouring within the electrolytic mixtures. Based on this analysis, and as expected, all activation energies increase with the Li[TFSI] concentration in solution, and all activation energies were determined from the self-diffusion data for all ions. Interestingly, regardless of the composition in solution, these activation energies were similar, except for those determined for the [FSI]− anion. The activation energy of [FSI]− self-diffusion relatively decreases compared to the other ions as the lithium salt concentration increases. Furthermore, the lithium transference was strongly affected by the lithium salt concentration, reaching an optimal value and an ionicity of approximately 50 % at a molality close to 0.75 mol · kg−1. Finally, these electrolytes were used in lithium-ion batteries (i.e. Li/NMC and LTO/NMC), demonstrating a clear relationship between the electrolyte formulation, its transport parameters and battery performance.

Comparative study on transport properties for LiFAP and LiPF6 in alkyl-carbonates as electrolytes through conductivity, viscosity and NMR self-diffusion measurements

2013 ◽  
Vol 114 ◽  
pp. 95-104 ◽  
Author(s):  
Patrice Porion ◽  
Yvon Rodrigue Dougassa ◽  
Cécile Tessier ◽  
Loubna El Ouatani ◽  
Johan Jacquemin ◽  
...  
Keyword(s):  
Comparative Study ◽  
Transport Properties ◽  
Self Diffusion

The Influence of Water and Metal Ions on the Transport Properties of Trihexyl(tetradecyl)phosphonium Chloride

2012 ◽  
Vol 65 (11) ◽  
pp. 1542 ◽  
Author(s):  
Paul M. Bayley ◽  
Jan Novak ◽  
Timothy Khoo ◽  
Melanie M. Britton ◽  
Patrick C. Howlett ◽  
...  
Keyword(s):  
Transport Properties ◽  
Metal Salt ◽  
Metal Salts ◽  
Self Diffusion ◽  
Phosphonium Chloride ◽  
Influence Of Water ◽  
Order Of Magnitude ◽  
Air Battery ◽  
Water Saturated ◽  
Self Diffusion Coefficient

A recent study indicated that the water-saturated ionic liquid (IL) trihexyl(tetradecyl)phosphonium chloride ([P6,6,6,14][Cl]) provided a viable electrolyte for a Mg-air battery. However, there is limited literature on the properties of IL-water mixtures as battery electrolytes. The physical properties of [P6,6,6,14][Cl] were studied with the addition of both water and metal salts (MgCl2 and LiCl) using conductivity and self-diffusion coefficient measurements. The conductivity of the samples at low water concentrations is surprisingly enhanced by the addition of the metal salt, contrary to lithium IL electrolytes. It was also found that the conductivity of the IL was increased by an order of magnitude by saturation with water. NMR diffusion measurements were used to probe the behaviour of both the cation and the water in the mixtures. It was found that the addition of metal salts to the water-saturated [P6,6,6,14][Cl] did not affect the transport properties of the water or cation.

Evaluation of self-diffusion data using weighted means statistics

2011 ◽  
Vol 59 (13) ◽  
pp. 5194-5201 ◽  
Author(s):  
C.E. Campbell ◽  
A.L. Rukhin
Keyword(s):  
Diffusion Data ◽  
Self Diffusion ◽  
Weighted Means
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