Grundy, Lorena S. published the artcileImpact of frictional interactions on conductivity, diffusion, and transference number in ether- and perfluoroether-based electrolytes, Related Products of ethers-buliding-blocks, the main research area is lithium tetraglyme perfluoroether mol interaction electrolyte ionic conductivity thermodn.
There is growing interest in fluorinated electrolytes due to their high-voltage stability. We use full electrochem. characterization based on concentrated solution theory to investigate the underpinnings of conductivity and transference number in tetraglyme/LiTFSI mixtures (H4) and a fluorinated analog, C8-DMC, mixed with LiFSI (F4). Conductivity is significantly lower in F4 than in H4, and F4 exhibits neg. cation transference numbers, while that of H4 is pos. at most salt concentrations By relating Stefan-Maxwell diffusion coefficients, which quantify ion-solvent and cation-anion frictional interactions, to conductivity and transference number, we determine that at high salt concentrations, the origin of differences in transference number is differences in anion-solvent interactions. We also define new Nernst-Einstein-like equations relating conductivity to Stefan-Maxwell diffusion coefficients In H4 at moderate to high salt concentrations, we find that all mol. interactions must be included. However, we demonstrate another regime, in which conductivity is controlled by cation-anion interactions. The applicability of this assumption is quantified by a pre-factor, β±, which is similar to the “”ionicity”” pre-factor that is often included in the Nernst-Einstein equation. In F4, β± is unity at all salt concentrations, indicating that ionic conductivity is entirely controlled by the Stefan-Maxwell diffusion coefficient quantifying cation-anion frictional interactions.
Journal of the Electrochemical Society published new progress about Diffusion. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Related Products of ethers-buliding-blocks.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem