Ionic liquids based on aliphatic tetraalkylammonium dications and TFSI anion as potential electrolytes

Zhang, Zhengxi; Yang, Li; Luo, Shichun; Tian, Miao; Tachibana, Kazuhiro; Kamijima, Kouichi

doi:10.1016/j.jpowsour.2007.01.033

Cited by 75 publications

(61 citation statements)

References 38 publications

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“…Since then, various ammonium-based RTILs, combined with TFSI, have been studied. [20][21][22] Recently, Ishikawa et al employed bis-(fluorosulfonyl)imide (FSI) anions, which have an F atom instead of a CF 3 group in TFSI. This structural modification significantly improved the viscosity and ionic conductivity.…”

Section: What Are Room-temperature Ionic Liquids?mentioning

confidence: 99%

Room Temperature Ionic Liquid‐based Electrolytes as an Alternative to Carbonate‐based Electrolytes

Yim

Kwon

Mun

et al. 2015

Israel Journal of Chemistry

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The issue of the safety of Li‐ion batteries is becoming more critical with the increase in their size for applications in large energy storage devices, such as hybrid electric vehicles (HEVs), and energy storage systems (ESSs) for smart grids. The thermal runaway of Li‐ion batteries is considered to be caused by their flammable components, such as the volatile carbonate solvents of electrolytes. Room temperature ionic liquids (RTILs) have recently received much attention because of their characteristics of non‐flammability and non‐volatility. In addition, RTILs show high ionic conductivity and a wide electrochemical stability window. Therefore, RTIL‐based electrolytes are considered one of the most promising candidates to improve the safety of Na‐ion, as well as Li‐ion batteries; indeed, RTIL‐based electrolytes have shown excellent improvements in terms of thermal stability and electrochemical performance. This review provides a comprehensive overview of selected RTIL materials, including their physicochemical and electrochemical properties. Moreover, we discuss the failure mechanisms of certain RTIL‐based electrolytes with various electrodes to suggest alternative strategies for improving their electrochemical performance.

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Section: What Are Room-temperature Ionic Liquids?mentioning

confidence: 99%

Room Temperature Ionic Liquid‐based Electrolytes as an Alternative to Carbonate‐based Electrolytes

Yim

Kwon

Mun

et al. 2015

Israel Journal of Chemistry

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“…For the same reason, they have been used as solvents for high-temperature organic reactions, [11] additives in chromatography, [12] selective complexation and extraction agents for mercury(II), [13] and electrolytes and synthetic lubricants. [14] Until now, however, less effort has been devoted to achieving a better understanding of their tridimensional structure, which could give particular features to these solvent systems and could be responsible for the effects that they exert on a given process.…”

Section: A C H T U N G T R E N N U N G [Bis(trifluoromethanesulfonyl)mentioning

confidence: 99%

Geminal Ionic Liquids: A Combined Approach to Investigate Their Three‐Dimensional Organisation

D’Anna

Ferrante

Noto

2009

Chemistry A European J

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Different investigations, such as 1D and 2D NMR spectroscopy, resonance light scattering spectroscopy and molecular dynamics simulations, have been jointly used to achieve a deeper understanding of the degree of structural order in two geminal ionic liquids. In particular, 3,3'-di-n-butyl-1,1'-(1,3-phenylenedimethylene)diimidazolium and 3,3'-di-n-butyl-1,1'-(1,4-phenylenedimethylene)diimidazolium bis[bis(trifluoromethanesulfonyl)imide] have been studied. These geminal ionic liquids were chosen because of the presence of both a rigid phenylenedimethylene link between two imidazolium rings, which should give a high degree of order to the solvent system, and the different shapes of the two cations of the isomers, which could induce different properties and packing in the liquid state. Data collected here show that the two geminal ionic liquids are characterised by a different degree of structural order that induces, for example, a different sensitivity of the two solvent systems to temperature changes or to the presence of a co-solvent such as methanol.

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“…For (i) the solid-liquid transitions occurs at 22.9ºC, being liquid at room temperature, however (ii) has a solid-liquid transition at 42.7ºC. This behavior is contrary to what was expected, since increasing the link chain between the cations, the solid-liquid transition should decrease 12,14 . This phenomenon could be related to the water molecules present in both products.…”

Section: E-mail: Ibrito@uantofclmentioning

confidence: 66%

“…This kind of ILs demonstrate unique features in critical micelle concentration, better behavior as lubricants, electrolytes characteristics, surface tension, and higher thermal stabilities than monocationic ILs and other traditional solvents [6][7][8][9] . Besides the combination cation-anion, simple changes in the length of the spacer or in the aliphatic chains on the cations, allows the physical properties of these ionic liquids to be tailored for specific applications [11][12][13] . We report here, the synthesis, characterization and thermal properties of two new dicationic ionic liquids.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Thermal Properties of Two New Dicationic Ionic Liquids

Claros

Graber

Brito

et al. 2010

J. Chil. Chem. Soc.

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Ionic liquids based on aliphatic tetraalkylammonium dications and TFSI anion as potential electrolytes

Cited by 75 publications

References 38 publications

Room Temperature Ionic Liquid‐based Electrolytes as an Alternative to Carbonate‐based Electrolytes

Room Temperature Ionic Liquid‐based Electrolytes as an Alternative to Carbonate‐based Electrolytes

Geminal Ionic Liquids: A Combined Approach to Investigate Their Three‐Dimensional Organisation

Synthesis and Thermal Properties of Two New Dicationic Ionic Liquids

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