Asymmetric sulfonium-based molten salts with TFSI− or PF6− anion as novel electrolytes

Yang, Li; Zhang, Zhengxi; Gao, Xuhui; Zhang, Huanqi; Mashita, Kiyotaka

doi:10.1016/j.jpowsour.2006.06.050

Cited by 33 publications

(21 citation statements)

References 44 publications

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“…The value, 0.0280 nm 3 , of the slope of the fitting line is the mean contribution of the methylene to the molecular volume at 298. 15 . 35 The volume values of the cations and the radii are listed in Table 7.…”

mentioning

confidence: 99%

Physicochemical Properties of Ionic Liquids [C₃py][NTf₂] and [C₆py][NTf₂]

Liu

Yang

et al. 2011

J. Chem. Eng. Data

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Air-and water-stable hydrophobic ionic liquids N-alkylpyridinium bis(trifluoromethylsulfonyl)imide ([C n py][NTf 2 ], n = 3, 6) were synthesized. The density, surface tension, dynamic viscosity, and electrical conductivity of [C 6 À ILs as a hydrophobic compound has attracted much more attention in some fields. 5À8Tokuda et al. 9 have studied the properties of a series of imidazolium-based ILs, for example, the melting temperature, glass transition temperature, dynamic viscosity, and electrical conductivity. The melting temperatures are lower than room temperature, so these ILs are liquid at room temperature; the decomposition temperatures are higher than 690 K, so these ILs exhibit excellent thermal stability. The electrical conductivities are also high enough to be applied in electrochemical devices. Oliveira et al.10 studied the properties of a series of pyridiniumbased ILs. The density and dynamic viscosity of the dried and saturated ILs were studied. The water content has a strong effect on the dynamic viscosity, but only a very small effect on density was observed. Jacquemin et al.11 have also studied the density and dynamic viscosity of several pure and watersaturated ILs. The same results were obtained for the effect of water content on the density and dynamic viscosity. The ILs with [NTf 2 ] À anion were studied widely because this type of ILs has a relatively low viscosity, a wide electrochemical window, and a high electrical conductivity to be applied in the electrochemical devices. 12À16In view of the above facts, the density, surface tension, dynamic viscosity, and electrical conductivity of the ILs [C n py][NTf 2 ] (n = 3, 6) were measured at different temperatures, except for the surface tension of [C 3 py][NTf 2 ]. The speed of sound was estimated by the Auerbach relation at the different temperatures. 17The standard molar entropy and lattice energy were estimated in terms of Glasser's theory. 18 Parachor was estimated by the equation reported in the ref 19. The molar enthalpy of vaporization was estimated in terms of Kabo's empirical equation. 20 The interstice volume, interstice fraction, and thermal expansion coefficient were estimated by the interstice model theory. 21,22 The VogelÀFulcherÀTammann (VFT) and Arrhenius equations were used to fit the temperature dependence on dynamic viscosity and electrical conductivity values.' EXPERIMENTAL SECTION Preparation of ILs [C n py][NTf 2 ] (n = 3, 6). N-Alkylpyridinium bromide ([C n py][Br], n = 3, 6) was synthesized according to the procedure described in earlier paper. 23 [C n py][NTf 2 ], n = 3, 6, were synthesized according to the ion exchange reaction. The 80 g of salt [C n py][Br], n = 3, 6 was placed in a 500 mL roundbottomed flask and dissolved in 30 mL of distilled water; the equivalent amount of bis(trifluoromethanesulfonyl)imide (HN-(SO 2 CF 3 ) (Rhodia Co., mass purity 99.9 %) was added dropwise

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confidence: 99%

Physicochemical Properties of Ionic Liquids [C₃py][NTf₂] and [C₆py][NTf₂]

Liu

Yang

et al. 2011

J. Chem. Eng. Data

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“…But these trace substances did not affect the result of the cathodic and anodic limiting potentials for these ILs [25] . In conclusion, the electrochemical stability of these alkylthiolanium-based ILs is close to that of the trialkylsulfonium salts [24,25] . …”

Section: Electrochemical Properties Of the Prepared Ilsmentioning

confidence: 58%

“…Ionic liquids based on symmetric trialkylsulfonium cations and various anions, including N-(trifluoromethylsulfonyl) pentafluoroethylsulfonamide (CIC2 − ), bis(trifluoromethylsulfonyl)imide (TFSI − ), 2,2, 2-trifluoro-N-(trifluoromethylsulfonyl)acetamide(TSAC − ), have been investigated for low viscosity, high conductivity and high electrochemical stability by Matsumoto et al [22,23] . Recently, several ionic liquids based on asymmetric trialkylsulfonium cations with TFSI − and PF 6 − anions have been investigated, and the characteristics of these salts, including thermal properties, viscosity, conductivity and electrochemical window, have been reported [24,25] . Like pyrrolidinium and pyridinium, cyclic sulfonium…”

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confidence: 99%

Ionic liquids based on S-alkylthiolanium cations and TFSI anion as potential electrolytes

et al. 2009

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“…1-Butyldimethyl-sulfonium, bis(trifluoromethylsulfonyl) imide (S 114 TFSI) as shown in Figure 1, was synthesized according to our previous paper [15] . To prepare the Li-binary ionic liquids, weighed quantities of LiTFSI were dissolved into S 114 TFSI.…”

Section: Methodsmentioning

confidence: 99%

“…Electrochemical window of the neat S 114 TFSI ionic liquid was determined by cyclic voltammetry and the value is about 4.2 V [15] . The cathodic potential was positive against the Li/Li + .…”

Section: Charge-discharge Properties Of Li/limn 2 O 4 Cellmentioning

confidence: 99%

Lithium secondary batteries using an asymmetric sulfonium-based room temperature ionic liquid as a potential electrolyte

2008

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Asymmetric sulfonium-based molten salts with TFSI− or PF6− anion as novel electrolytes

Cited by 33 publications

References 44 publications

Physicochemical Properties of Ionic Liquids [C₃py][NTf₂] and [C₆py][NTf₂]

Physicochemical Properties of Ionic Liquids [C₃py][NTf₂] and [C₆py][NTf₂]

Ionic liquids based on S-alkylthiolanium cations and TFSI anion as potential electrolytes

Lithium secondary batteries using an asymmetric sulfonium-based room temperature ionic liquid as a potential electrolyte

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Asymmetric sulfonium-based molten salts with TFSI− or PF6− anion as novel electrolytes

Cited by 33 publications

References 44 publications

Physicochemical Properties of Ionic Liquids [C3py][NTf2] and [C6py][NTf2]

Physicochemical Properties of Ionic Liquids [C3py][NTf2] and [C6py][NTf2]

Ionic liquids based on S-alkylthiolanium cations and TFSI anion as potential electrolytes

Lithium secondary batteries using an asymmetric sulfonium-based room temperature ionic liquid as a potential electrolyte

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Physicochemical Properties of Ionic Liquids [C₃py][NTf₂] and [C₆py][NTf₂]

Physicochemical Properties of Ionic Liquids [C₃py][NTf₂] and [C₆py][NTf₂]