Journal ArticleDOI
Ionic Liquids with Low Melting Points and Their Application to Double-Layer Capacitor Electrolytes
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TLDR
Ionic liquids, 1-ethyl-3-methylimidazolium hexafluorotantalate (EMITaF 6 ) and hexacrylamide hexaflamide (EMINbF 6 ), were synthesized by a new method.Abstract:
Ionic liquids, 1-ethyl-3-methylimidazolium hexafluorotantalate (EMITaF 6 ) and hexafluoroniobate (EMINbF 6 ) were synthesized by a new method. They showed lower melting points and higher decomposition temperatures than popular EMIBF 4 due to larger anion size. Electrolytic conductivities of these ionic liquids were about 6 mS cm - 1 at 25°C. Lowering the melting point of ionic liquids did not result in the improvement of low-temperature characteristics of carbon double-layer capacitors, however, the new ionic liquids showed long life compared with EMICF 3 SO 3 , EMI(CF 3 SO 2 ) 2 N, and EMI(C 2 F 5 SO 2 ) 2 N at 3.0 V, 70°C. The derivatives of the new ionic liquids having a methyl group in 2-position (l-ethyl-2,3-dimethylimidazolium salts) were not ionic liquids at room temperature.read more
Citations
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Materials for electrochemical capacitors
TL;DR: This work has shown that combination of pseudo-capacitive nanomaterials, including oxides, nitrides and polymers, with the latest generation of nanostructured lithium electrodes has brought the energy density of electrochemical capacitors closer to that of batteries.
Journal ArticleDOI
Organic Carbonates as Solvents in Synthesis and Catalysis
Journal ArticleDOI
Surface Structure at the Ionic Liquid−Electrified Metal Interface
TL;DR: The results present a view of the ionic liquid-metal electrode interface having a very thin "double layer" structure where the ions form a single layer at the surface to screen the electrode charge, and raise many other fundamental questions as to the detailed nature of the interfacial structure and interpretations of both electrochemical and spectroscopic data.
Journal ArticleDOI
Application of Low-Viscosity Ionic Liquid to the Electrolyte of Double-Layer Capacitors
TL;DR: In this article, the performance of a double-layer capacitor (DLC) composed of activated carbon electrodes and 1--ethyl-3-methylimidazolium fluoride (EMIF).
Journal ArticleDOI
Molecular dynamics simulation of the electrochemical interface between a graphite surface and the ionic liquid [BMIM][PF6]
TL;DR: The structure of the electrical double layer in the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate near a basal plane of graphite was investigated by molecular dynamics simulation and it was shown that there are no adsorbed anions on the negatively charged surface, but the surface concentration of Adsorbed cations on the positively charged surface has a nonzero value.
References
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Book
Electrochemical Supercapacitors : Scientific Fundamentals and Technological Applications
TL;DR: In this paper, the double-layer and surface functionalities at Carbon were investigated and the double layer at Capacitor Electrode Interfaces: its structure and Capacitance.
Journal ArticleDOI
Hydrophobic, Highly Conductive Ambient-Temperature Molten Salts
Pierre Bonhote,Ana-Paula Dias,Nicholas Papageorgiou,Kuppuswamy Kalyanasundaram,Michael Grätzel +4 more
TL;DR: New, hydrophobic ionic liquids with low melting points (<−30 °C to ambient temperature) have been synthesized and investigated, based on 1,3-dialkyl imidazolium cations and hydrophilic anions and thus water-soluble.
Journal ArticleDOI
Thermal properties of imidazolium ionic liquids
TL;DR: In this paper, the thermal properties of several imidazolium salts were investigated using DSC and TGA/SDTA data, and it was observed that aluminium catalyzes the decomposition of the salts containing the inorganic fluoride anions.
Journal ArticleDOI
Electrochemical properties of imidazolium salt electrolytes for electrochemical capacitor applications
TL;DR: In this paper, the specific ionic conductivity, dynamic viscosity, and electrochemical stability of several imidazolium salts are reported as neationic liquids and their solutions in several organic solvents.
Journal ArticleDOI
Dual Intercalating Molten Electrolyte Batteries
TL;DR: In this paper, reductive and oxidative intercalation of ions into graphite from room-temperature and low temperature molten salts is demonstrated for a two-electrode battery.
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