Themed collection Dense ionic fluids

A DIF is a electrolyte where the ion–ion distance is smaller than the Bjerrum length, causing strong electrostatic coupling in correlated domains. Ionic domains may be interspersed with non-polar or immiscible regions.

Li[(CF₃SO₂)₂N] mixtures with propane sultone or sulfolane, newly termed as glass-forming liquid electrolytes, exhibited large-size aggregate (AGG) formation via speciation and dipole reorientation. The AGGs may be crucial for the unique Li⁺ conduction.

This article presents a perspective on what we think are key topics related to the structure and structural dynamics of ILs and to some extent high-temperature molten salts.

Type V deep eutectic solvents thymol : camphor, menthol : thymol and eutectic mixtures based on menthol : carboxylic acids with variable chain length, are investigated to clarify the peculiar nanostructure of these materials..

Here we examine the question of the chemical models widely used to describe dense solutions, particularly ionic solutions.

Four model 1,2,3-triazole-based polyILs with polycation or polyanion backbones, are investigated to understand the impact of mobile ion types and backbone chemical structure.

Tetraalkylphosphonium carboxylate ionic liquids absorb large quantities of carbon dioxide and are easily regenerated.

We reinvestigated the PEG/K₂HPO₄/H₂O systems using a combination of liquid-phase nuclear magnetic resonance and high-resolution Raman spectroscopies, coupled with injection microcalorimetry.

The stability of the LiCl/LiTFSI interface increases with the concentration of both electrolytes, but mainly LiCl.

Reversible lithium plating/stripping in concentrated electrolytes is discussed from the viewpoints of liquid structure, lithium electrode potential, and solid-electrolyte-interphase formation.

Using a combination of liquid-phase X-ray spectroscopy experiments and small-scale calculations we have gained new insights into the speciation of halozincate anions in ionic liquids.

Nanoparticles of iron oxide are dispersed in mixtures of water and ionic liquid, here ethylammonium nitrate, and the NP/NP and NP/solvent interactions are studied.

The ionic liquids [C₁₀MIM][Tf₂N] and [C₁₀MIM-F₁₇][Tf₂N] are miscible in all proportions, but scattering studies and MD calculations show the formation of small aggregates. These data are discussed relative to hydrocarbon/fluorocarbon miscibility.

Linear ether-based electrolytes show low solubility of the sulfur species, stability towards Li metal and polysulfide nucleophiles. Li–S cells using the lightweight electrolyte demonstrated an energy density exceeding 300 W h kg⁻¹.

We have developed a theory for the electrical double layer of salt-in-ionic liquids accounting for the thermoreversible association of ions into Cayley tree aggregates. We find that the solution becomes more aggregated at moderate positive voltages.

We present measurements and analysis of the interactions between macroscopic bodies across a fluid mixture of two ionic liquids of widely diverging ionic size.

We demonstrate a learning-on-the-fly procedure to train machine-learned potentials from single-point density functional theory calculations before performing production molecular dynamics simulations.

The size of cationic micelles in a pTSA based deep eutectic solvent can be tuned by changing the solvent composition, which alters the surfactant–solvent interactions.

We quantified the balance between excess enthalpy (interactions) and excess entropy (structure/disorder) of mixing that determines large melting point depressions in deep eutectic solvents (DESs), reformulating the role of hydrogen bonding in DESs.

In 21 m LiTFSI water-in-salt electrolyte, the proton forms species existing in bulk water (H₃O⁺, H₅O₂⁺, etc.) as well as the HTFSI acid, known to be a superacid in water.

An experimental overdetermination method and a Reverse Monte Carlo-based approach lead to strongly reduced uncertainties of transport parameters for highly concentrated electrolytes and to accurate information about ion correlations and transport limitations in batteries.

We characterise the development of cavitation structure in three deep eutectic solvents of increasing viscosity, and water, via high-speed imaging and parallel acoustic detection..

Formation of metal passivation layers during electrochemical dissolution is prevented by the use of ultrasound. Migration becomes the main method of mass transport across the electrical double layer.

Unusually high Li transference numbers (t⁺ > 0.7) in a bisolvent-in-salt electrolyte are explained by a heterogeneous Li solvation structure, which yields two distinctly different Li species with different transport behavior.