Anion effects on Li ion transference number and dynamic ion correlations in glyme–Li salt equimolar mixtures

Abstract

Cation–anion interactions and Li ion coordination structure have a significant impact on dynamic ion correlations and Li ion transference number of glyme–Li salt molten mixtures.

Glyme-based electrolytes: suitable solutions for next-generation lithium batteries

“…Furthermore, the five Onsager transport coefficients for [Li(G 3 )][TFA] were larger than those of [Li(G3)][TFSA] by about two order of magnitudes due to the low ionic conductivity of the former electrolyte. 81,82…”

“…Reproduced with permission. 82 This journal is © the Owner Societies 2021. in concentrations of 2 mol kg solvent −1 ); specific capacity limited to 500 mAh g −1 as referred to the mass of carbon cast on the cathode GDL; current rate: 100 mA g −1 (current rate referred to the mass of carbon cast on the cathode GDL); carbon loading over the cathode GDL: 0.65 mg cm −2 (carbon mass:…”

Solvate electrolytes for Li and Na batteries: structures, transport properties, and electrochemistry

“…LiClO 4 in organic solvents. 18 98 The stronger Li ion-anion interaction forming more-pronounced AGG networks in [Li(SL) 2 ][BF 4 ] will positively contribute to the enhancement of t PP Li in addition to the solvent-bridged structures.…”

“…We evaluated the Onsager coefficients for molten Li salt solvates to elucidate the ion correlations. 87,98 The values of s self + and s self À were calculated from the self-diffusion coefficients of ions. The values of s ++ , s ÀÀ , and s +À were estimated from the experimentally obtained quantities: ionic conductivity, transference number (t PP Li ), salt diffusion coefficients, and the slope of the concentration dependence of the concentration cell potentials.…”

How Temperature, Pressure, and Salt Concentration Affect Correlations in LiTFSI/EMIM-TFSI Electrolytes: A Molecular Dynamics Study

“…Cross-correlations between ion motions play an important role in charge transport and conductivity of an electrolyte. Analysis of correlations and their effect on transference numbers or ion transport was reported for Li salt/glyme solutions, 36 − 40 IL/molecular solvent blends, 41 , 42 ILs, or salt solutions in ILs. 43 − 47 Recently, negative effective transference numbers of Li + cations were determined for LiTFSI solutions in EMIM-TFSI IL 48 and attributed to Li + -anion correlations.…”