Electrochemistry of the ionic liquid|oil interface: A new water-free interface between two immiscible electrolyte solutions

2013 ◽  
Vol 31 ◽  
pp. 63-66 ◽  
Author(s):  
Nico E.A. Cousens ◽  
Anthony R. Kucernak
Keyword(s):  
Ionic Liquid ◽  
Electrolyte Solutions ◽  
Free Interface

scholarly journals Organic electrolyte solutions as versatile media for the dissolution and regeneration of cellulose

2017 ◽  
Vol 19 (20) ◽  
pp. 4754-4768 ◽  
Author(s):  
Matthew T. Clough
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Electrolyte Solutions ◽  
Room Temperature Ionic Liquid ◽  
Organic Electrolyte

Organic electrolyte solutions – mixtures of a (room-temperature) ionic liquid with a neutral, organic, polar co-solvent – are attracting increasing attention as solvents for the regeneration and derivatisation of cellulose.

High performance of thick amorphous columnar monolithic film silicon anodes in ionic liquid electrolytes at elevated temperature

RSC Advances ◽  
2014 ◽  
Vol 4 (89) ◽  
pp. 48572-48575 ◽  
Author(s):  
E. Markevich ◽  
G. Salitra ◽  
A. Rosenman ◽  
Y. Talyosef ◽  
D. Aurbach ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Elevated Temperature ◽  
High Performance ◽  
Electrolyte Solutions ◽  
Cycling Performance ◽  
Silicon Anodes ◽  
Liquid Electrolytes

The cycling performance of thick (about 7 μm) amorphous columnar monolithic film silicon anodes was studied in ionic liquid based electrolyte solutions. More than 1000 cycles at 60 °C were achieved.

scholarly journals UV-VISIBLE OPTICAL ABSORBANCE OF GRAPHENE OXIDE IN COPPER IONIC LIQUID SYNTHESIZED VIA ELECTROCHEMICAL METHOD ASSISTED BY A COPPER COIL

2018 ◽  
Vol 3 (2) ◽  
pp. 85-92
Author(s):  
Wipsar Sunu Brams Dwandaru ◽  
Oktiana Lusi Priyani ◽  
Bagas Prakoso ◽  
Rhyko Irawan Wisnuwijaya ◽  
Iman Santoso
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Electrolyte Solution ◽  
Blue Shift ◽  
Electrolyte Solutions ◽  
Electrical Circuit ◽  
Electrochemical Exfoliation ◽  
Optical Absorbance ◽  
Uv Visible ◽  
Copper Coil

An optical absorbance study using Ultraviolet-Visible (UV-Vis) spectrophotometer device has been conducted on graphene oxide (GO) in copper (Cu) ionic liquid using electrochemical exfoliation combined with a direct current (DC) electrical circuit of copper coil given inside the electrolyte solution. The electrolyte solutions used are sulfuric acid (H2SO4) and chloride acid (HCl). The UV-Vis spectrum of the samples shows absorbance peaks at around 214 nm to 218 nm and shouldering peaks around 245 nm to 249 nm. The first peak corresponds to the existence of copper (Cu) ionic liquid in the solution, whereas the shouldering peak is related to the occurrence of GO material. A comparison between UV-Vis spectral of graphite in dimethylformamide (DMF) and GO in Cu ionic liquid in DMF resulted in the existence of a blue shift which signifies the production of Cu ionic liquid from the Cu coils inside the electrolyte solution. Increasing the concentration of the solution increases the absorbance peaks. Furthermore, raising the number of loops yields in the increase of the absorbance value at the first peaks that show Cu ionic liquid, but tends to decrease the absorbance value of the shouldering peaks of the GO material.

scholarly journals Silica gel solid nanocomposite electrolytes with interfacial conductivity promotion exceeding the bulk Li-ion conductivity of the ionic liquid electrolyte filler

2020 ◽  
Vol 6 (2) ◽  
pp. eaav3400 ◽  
Author(s):  
Xubin Chen ◽  
Brecht Put ◽  
Akihiko Sagara ◽  
Knut Gandrud ◽  
Mitsuhiro Murata ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Electrolyte Solutions ◽  
Liquid Electrolyte ◽  
Ion Conductivity ◽  
Ionic Liquid Electrolyte ◽  
Silica Monolith ◽  
Strong Adsorption ◽  
Mesoporous Oxide ◽  
Li Ion ◽  
Nanocomposite Electrolytes

The transition to solid-state Li-ion batteries will enable progress toward energy densities of 1000 W·hour/liter and beyond. Composites of a mesoporous oxide matrix filled with nonvolatile ionic liquid electrolyte fillers have been explored as a solid electrolyte option. However, the simple confinement of electrolyte solutions inside nanometer-sized pores leads to lower ion conductivity as viscosity increases. Here, we demonstrate that the Li-ion conductivity of nanocomposites consisting of a mesoporous silica monolith with an ionic liquid electrolyte filler can be several times higher than that of the pure ionic liquid electrolyte through the introduction of an interfacial ice layer. Strong adsorption and ordering of the ionic liquid molecules render them immobile and solid-like as for the interfacial ice layer itself. The dipole over the adsorbate mesophase layer results in solvation of the Li+ ions for enhanced conduction. The demonstrated principle of ion conduction enhancement can be applied to different ion systems.

scholarly journals Phase-Separation of Cellulose from Ionic Liquid upon Cooling: Preparation of Microsized Particles

2021 ◽  
Author(s):  
Jingwen Xia ◽  
Alistair W. T. King ◽  
Ilkka Kilpelainen ◽  
Vladimir Aseyev
Keyword(s):  
Ionic Liquid ◽  
Phase Separation ◽  
Electrolyte Solutions ◽  
Colloidal Dispersions ◽  
Fiber Spinning ◽  
Solution Temperature ◽  
Experimental Conditions ◽  
Critical Solution Temperature ◽  
Upper Critical Solution Temperature ◽  
Separation Temperature

Abstract Cellulose is an historical polymer, for which its processing possibilities have been limited by the absence of a melting point and insolubility in all non-derivatizing molecular solvents. More recently, ionic liquids (ILs) have been used for cellulose dissolution and regeneration, for example, in the development of textile fiber spinning processes. In some cases, organic electrolyte solutions (OESs), that are binary mixtures of an ionic liquid and a polar aprotic co-solvent, can show even better technical dissolution capacities for cellulose than the pure ILs. Herein we use OESs consisting of two tetraalkylphosphonium acetate ILs and dimethyl sulfoxide (DMSO) or γ-valerolactone (GVL), as co-solvents. Cellulose can be first dissolved in these OESs at 120°C and then regenerated, upon cooling, leading to micro and macro phase-separation. This phenomenon much resembles the upper-critical solution temperature (UCST) type thermodynamic transition. This observed UCST-like behavior of these systems allows for the controlled regeneration of cellulose into colloidal dispersions of spherical microscale particles (spherulites), with highly ordered shape and size. While this phenomenon has been reported for other IL and NMMO-based systems, the mechanisms and phase-behavior have not been well defined. The particles are obtained below the phase-separation temperature as a result of controlled multi-molecular association. The regeneration process is a consequence of multi-parameter interdependence, where the polymer characteristics, OES composition, temperature, cooling rate and time all play their roles. The influence of the experimental conditions, cellulose concentration and the effect of time on regeneration of cellulose in the form of preferential gel or particles is discussed.Regular micro-sized particles regenerated from a cellulose-OES mixture of tetrabutylphosphonium acetate:DMSO (70:30 w/w） upon cooling.

scholarly journals Phase-separation of cellulose from ionic liquid upon cooling: preparation of microsized particles

Cellulose ◽  
2021 ◽  
Author(s):  
Jingwen Xia ◽  
Alistair W. T. King ◽  
Ilkka Kilpeläinen ◽  
Vladimir Aseyev
Keyword(s):  
Ionic Liquid ◽  
Phase Separation ◽  
Electrolyte Solutions ◽  
Colloidal Dispersions ◽  
Fiber Spinning ◽  
Solution Temperature ◽  
Experimental Conditions ◽  
Critical Solution Temperature ◽  
Upper Critical Solution Temperature ◽  
Separation Temperature

Abstract Cellulose is an historical polymer, for which its processing possibilities have been limited by the absence of a melting point and insolubility in all non-derivatizing molecular solvents. More recently, ionic liquids (ILs) have been used for cellulose dissolution and regeneration, for example, in the development of textile fiber spinning processes. In some cases, organic electrolyte solutions (OESs), that are binary mixtures of an ionic liquid and a polar aprotic co-solvent, can show even better technical dissolution capacities for cellulose than the pure ILs. Herein we use OESs consisting of two tetraalkylphosphonium acetate ILs and dimethyl sulfoxide or γ-valerolactone, as co-solvents. Cellulose can be first dissolved in these OESs at 120 °C and then regenerated, upon cooling, leading to micro and macro phase-separation. This phenomenon much resembles the upper-critical solution temperature (UCST) type thermodynamic transition. This observed UCST-like behavior of these systems allows for the controlled regeneration of cellulose into colloidal dispersions of spherical microscale particles (spherulites), with highly ordered shape and size. While this phenomenon has been reported for other IL and NMMO-based systems, the mechanisms and phase-behavior have not been well defined. The particles are obtained below the phase-separation temperature as a result of controlled multi-molecular association. The regeneration process is a consequence of multi-parameter interdependence, where the polymer characteristics, OES composition, temperature, cooling rate and time all play their roles. The influence of the experimental conditions, cellulose concentration and the effect of time on regeneration of cellulose in the form of preferential gel or particles is discussed. Graphical abstract Regular micro-sized particles regenerated from a cellulose-OES mixture of tetrabutylphosphonium acetate:DMSO (70:30 w/w) upon cooling

scholarly journals γ-Valerolactone-based organic electrolyte solutions: a benign approach to polyaramid dissolution and processing

2020 ◽  
Vol 22 (18) ◽  
pp. 6127-6136
Author(s):  
Jonas Winters ◽  
Wim Dehaen ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquid ◽  
Hydrogen Bonding ◽  
Electrolyte Solution ◽  
Electrolyte Solutions ◽  
Organic Electrolyte ◽  
Dispersion Forces ◽  
Aromatic Polyamides ◽  
Organic Electrolyte Solution

Aromatic polyamides can be dissolved and processed in an organic electrolyte solution, where the ionic liquid and γ-valerolactone interact with the polymer through hydrogen bonding and dispersion forces, respectively.

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