Ionic activity in concentrated electrolytes: Solvent structure effect revisited

Solvent cages of ionic liquid: structure and effect on catalysis

Introduction Ionic liquids are a class of novel solvents with extremely high polarity [1]. Immobilization of organometallic complexes in thin films of supported ionic liquid has recently been suggested as a novel concept to combine the high selectivity of homogeneous catalysts with the easy separation of a heterogeneous system [2]. First catalytic studies show a high potential of these systems ...

Enhanced low-temperature ionic conductivity via different Li+ solvated clusters in organic solvent/ionic liquid mixed electrolytes.

We investigate Li+ coordination in mixed electrolytes based on ionic liquids (ILs) and organic solvents and its relation with the macroscopic properties such as phase behaviour and ionic conductivity. Using Raman spectroscopy we determine the solvation shell around Li+ in mixtures formed by the IL N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, the organic solvents ethylene ca...

Ionic Liquid-Based Thermoplastic Solid Electrolytes Processed by Solvent-Free Procedures

A series of thermoplastic polymer electrolytes have been prepared employing poly(ethylene oxide) (PEO) as a polymer matrix, bis(trifluoromethane sulfonimide) (LiTFSI), and different room-temperature ionic liquids (RTIL) with bis(fluorosulfonyl)imide (FSI) or TFSI anions. This formulation makes them safe and non-flammable. The electrolytes have been processed in the absence of solvents by melt c...

Liquid Structure with Nano-Heterogeneity Promotes Cationic Transport in Concentrated Electrolytes.

Using molecular dynamics simulations, small-angle neutron scattering, and a variety of spectroscopic techniques, we evaluated the ion solvation and transport behaviors in aqueous electrolytes containing bis(trifluoromethanesulfonyl)imide. We discovered that, at high salt concentrations (from 10 to 21 mol/kg), a disproportion of cation solvation occurs, leading to a liquid structure of heterogen...

Understanding Ionic Conductivity in Crystalline Polymer Electrolytes