Imine alkali metal salt and ion liquid and application of same as non water electrolyte

Abstract

The invention provides ion liquid composed of fluoroalkyl sulfimide salt alkali metal salt containing 'S-fluoroalkyl sulfimide group', fluoroalkyl sulfimide negative ions containing 'S-fluoroalkyl sulfimide group' and positive ions of sulfonium salt, ammonium salt and microcosmic salt. The ion liquid utilizes (fluoroalkyl sulfonyl) (fluoroalkyl sulfinyl) imine with sulfur valence state as +4 and hydroxylamine oxygen sulfonic acid to react to prepare intermediate fluoro alkyl (S- fluoroalkyl sulfimide group) sulfamide of fluoroalkyl sulfimide, effectively shortens the line that the (fluoroalkyl sulfonyl) (fluoroalkyl sulfinyl) imine is utilized to prepare fluoro alkyl (S- fluoroalkyl sulfimide group) sulfamide of fluoroalkyl sulfimide through the three steps of chlorination, fluorination and amination, and is convenient to operate and high in yield and purity. The alkali metal salt has good heat stability and hydrolysis resistance, has high conductivity and oxidation potential in traditional carbonic ester solution, and is good in compatibility with electrode materials widely used. The ion liquid can be applied to lithium ion batteries and carbon-based super capacitors.

Description

technical field [0001] The invention belongs to the field of organic fluorine chemistry, new materials and advanced power supply technology, and specifically relates to an alkali metal salt of a fluoroalkylsulfonimide containing an "S-fluoroalkylsulfonimide group", an ionic liquid and its preparation Method, and the application of the alkali metal salt and ionic liquid as electrolyte materials in secondary lithium (ion) batteries and carbon-based supercapacitors. Background technique [0002] Fluorine-containing sulfonyl imides and their alkali metal salts, especially lithium salts, are important fluorine-containing ion compounds. They are used in high-performance nonaqueous Electrolyte materials, new high-efficiency catalysts and other fields have important industrial application value. [0003] At present, most of the researches on fluorine-containing sulfonimides focus on monobasic fluorine-containing sulfonimides (Coord.Chem.Revs., 1997, 158, 413.), that is, the anion s...

AI Technical Summary

Problems solved by technology

But the shortcoming of this preparation method is: (1) with trifluoromethanesulfonyl isothiocyanate (CF 3 SO 2 N=S=O) is a raw material, and the yield of synthesizing this raw material is lower; (2) use Ruppert reagent (trimethyltrifluoromethylsilane, CF 3 SiMe 3 ), the price is more expensive, not suitable for large-scale preparation; (3) from the raw material trifluoromethylsulfonyl isothiocyanate (CF 3 SO 2 N=S=O) to the final product, the synthetic route is longer, and the overall yield is low

[0010] 2) Trifluoromethyl (S-trifluoromethylsulfonylimide) sulfonyl chloride (CF 3 (CF 3 SO 2 N) SOCl, formula (II)) through fluorination reaction to obtain trifluoromethyl (S-trifluoromethylsulfonylimide) sulfonyl fluoride (CF 3 (CF 3 SO 2 N)SOF), further and lithium nitride (Li 3 N) reaction to synthesize bis(trifluoromethyl (S-trifluoromethylsulfonimide) sulfonyl)imide lithium ([(CF 3 (CF 3 SO 2 N)SO) 2 N] Li formula (V)), but this synthetic route is only suitable for preparing the target product of symmetry (US6340716B1)

[0020] So far, the relevant "S-fluoroalkylsulfonylimide (R F SO 2 There are few reports on the synthesis of fluoroalkylsulfonimides and their derivatives of N=S)" group, and the existing preparation methods have shortcomings such as high cost and low yield, especially the ionic liquid of the anion and its derivatives. The application of lithium salts as electrolyte materials in the field of electronic devices (such as lithium-ion batteries, carbon-based supercapacitors) has not yet been reported.

Especially (fluoroalkyl(S-fluoroalkylsulfonimido)sulfonyl)(fluorosulfonyl)imide and (fluoroalkyl(S-fluoroalkylsulfonylimido)sulfonyl)(bis The preparation and application of fluorophosphoryl imides and derivatives thereof have not been reported yet.

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