Journal ArticleDOI
Structural studies of ambient temperature plastic crystal ion conductors
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A number of novel organic ionic compounds based on the pyrrolidinium cation are described which have been found to be ion conductors in their solid states around room temperature.Abstract:
A number of novel organic ionic compounds based on the pyrrolidinium cation are described which have been found to be ion conductors in their solid states around room temperature. The properties of the compounds are consistent with their exhibiting plastic crystal phases. In order to understand some of the molecular origins of the plastic crystal behaviour and the ion conductivity that it promotes, a number of related compounds based on the imidazolium and ammonium cations are also described which have structural elements in common with the pyrrolidinium cation, but which do not show the plastic behaviour. It is found therefore that the nature of the cation is quite critical to the development of this behaviour. The alkyl methyl pyrrolidinium cation is found to produce plastic crystal phases when the alkyl chains are short, thereby preserving the ability of the cation to rotate with minimal steric hindrance. The ammonium and imidazolium cations of comparable size and structure are less able to produce these plastic phases, in many cases because the low temperature phase proceeds to melt rather than forming a stable rotator phase.read more
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Physicochemical Properties and Structures of Room Temperature Ionic Liquids. 1. Variation of Anionic Species
Hiroyuki Tokuda,Kunikazu Ishii,Md. Abu Bin Hasan Susan,Seiji Tsuzuki,Kikuko Hayamizu,Masayoshi Watanabe +5 more
TL;DR: In this article, room-temperature ionic liquids (RTILs) based on 1-butyl-3-methylimidazolium ([bmim]) with a variety of fluorinated anions were prepared, and the thermal behavior, density, viscosity, self-diffusion coefficients of the cations and anions, and ionic conductivity were measured over a wide temperature range.
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Electrolytes in Dye-Sensitized Solar Cells
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Multiscale Studies on Ionic Liquids
TL;DR: The present review aims to summarize the recent advances in the fundamental and application understanding of ILs, and introduces the structures and properties of typical ILs.
Journal ArticleDOI
Phosphonium-Based Ionic Liquids: An Overview
TL;DR: An overview of the properties of these interesting materials and the applications in which they are appearing can be found in this article, where the authors provide an overview of their properties and applications.
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Low-melting, low-viscous, hydrophobic ionic liquids: aliphatic quaternary ammonium salts with perfluoroalkyltrifluoroborates.
TL;DR: A novel class of low-melting, hydrophobic ionic liquids based on relatively small aliphatic quaternary ammonium cations and perfluoroalkyltrifluoroborate anions, which exhibit plastic crystal behavior and electrochemical windows much larger than those of the corresponding 1,3-dialkyimidazolium salts.
References
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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.
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Pyrrolidinium Imides: A New Family of Molten Salts and Conductive Plastic Crystal Phases
TL;DR: In this article, a new family of molten salts is reported, based on the Nalkyl, N-alkyl pyrrolidinium cation and the bis(trifluoromethane sulfonyl)imide anion.
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Lithium-doped plastic crystal electrolytes exhibiting fast ion conduction for secondary batteries
TL;DR: In this paper, the authors describe a class of materials, prepared by doping lithium ions into a plastic crystalline matrix, that exhibit fast lithium ion motion due to rotational disorder and the existence of vacancies in the lattice.