Journal ArticleDOI
Electrochemistry of Room Temperature Protic Ionic Liquids
Chuan Zhao,Geoffrey L. Burrell,Angel A. J. Torriero,Frances Separovic,Noel F. Dunlop,Douglas R. MacFarlane,Alan M. Bond +6 more
TLDR
The survey highlights the problems with voltammetric studies in highly viscous room temperature protic ionic liquids and also suggests the way forward with respect to their possible industrial use.Abstract:
Eighteen protic ionic liquids containing different combinations of cations and anions, hydrophobicity, viscosity, and conductivity have been synthesized and their physicochemical properties determined. In one series, the diethanolammonium cations were combined with acetate, formate, hydrogen sulfate, chloride, sulfamate, and mesylate anions. In the second series, acetate and formate anions were combined with amine bases, triethylamine, diethylamine, triethanolamine, di-n-propylamine, and di-n-butylamine. The electrochemical characteristics of the eight protic ionic liquids that are liquid at room temperature (RTPILs) have been determined using cyclic, microelectrode, and rotating disk electrode voltammetries. Potential windows of the RTPILs have been compared at glassy carbon, platinum, gold, and boron-doped diamond electrodes and generally found to be the largest in the case of glassy carbon. The voltammetry of IUPAC recommended potential scale reference systems, ferrocene/ferrocenium and cobaltocenium/cobaltocene, have been evaluated and found to be ideal in the case of the less viscous RTPILs but involve adsorption in the highly viscous ones. Other properties such as diffusion coefficients, ionic conductivity, and double layer capacitance also have been measured. The influence of water on the potential windows, viscosity, and diffusion has been studied systematically by deliberate addition of water to the dried ionic liquids. The survey highlights the problems with voltammetric studies in highly viscous room temperature protic ionic liquids and also suggests the way forward with respect to their possible industrial use.read more
Citations
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Structure and nanostructure in ionic liquids.
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Electrolytes for solid-state lithium rechargeable batteries: recent advances and perspectives
TL;DR: This critical review presents an overview of the various classes of Li(+) conductors for use as electrolytes in lithium polymer batteries and all-solid state microbatteries and focuses on the physico-chemical and functional parameters relevant for optimal electrolytes preparation.
Journal ArticleDOI
Ionic Liquids at Electrified Interfaces
TL;DR: One of the advantages of RTILs as compared to their high-temperature molten salt (HTMS) “sister-systems” is that the dissolved molecules are not imbedded in a harsh high temperature environment which could be destructive for many classes of fragile (organic) molecules.
Journal ArticleDOI
Protic Ionic Liquids: Evolving Structure–Property Relationships and Expanding Applications
TL;DR: It is expected that the fundamental properties of PILs will continue to be explored, along with continued interest in many existing and new applications, such as in electrochemistry, organic and inorganic synthesis, and biological applications.
Journal ArticleDOI
On the concept of ionicity in ionic liquids
Douglas R. MacFarlane,Maria Forsyth,Ekaterina I. Izgorodina,Andrew P. Abbott,Gary Annat,Kevin J. Fraser +5 more
TL;DR: Transport data is presented and an adjusted Walden plot that makes explicit allowance for differences in ion sizes is shown to be an improvement to this approach for the series of ionic liquids described, confirming the validity of the adjustedwalden plot approach.
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