Imine alkali metal salt and ion liquid as well as application thereof as non-water electrolyte

Abstract

The invention discloses an application of imine alkali metal salt and an ion liquid as non-water electrolyte, and provides an ion liquid consisting of perfluoroalkyl sulfimide alkali metal salt with 'S-perfluoroalkyl sulfimide', perfluoroalkyl sulfimide anion with 'S-perfluoroalkyl sulfimide', as well as sulfonium salt, ammonium salt, microcosmic salt cation. According to the application, an intermediate fluoro-alkyl(S-perfluoroalkyl imino) sulfamide of perfluoroalkyl sulfimide is prepared by reacting (perfluoroalkyl sulfonyl)(perfluoroalkyl sulfinyl) imino with sulfur valence state of +4 and hydroxylamine oxygen sulfonic acid, the routes that fluoro-alkyl(S-perfluoroalkyl imino) sulfamide is prepared from (perfluoroalkyl sulfonyl)(perfluoroalkyl sulfinyl) imino through three steps of chlorination, fluorination and amination are effectively shortened, the operation is simple and convenient, the yield and the purity are high, the alkali metal salt has relatively good thermal stability and hydrolysis resistance, has high conductivity and oxidation potential in the conventional carbonic ester solution, and is good in compatibility with widely applied electrode materials, and 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 sulfonylimides 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, the research on fluorine-containing sulfonimides is mostly concentrated on monofluorine-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 the raw material, and the yield of synthesizing the raw material is low; (2) 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 long and the overall yield is low

[0010] 2) Trifluoromethyl (S-trifluoromethylsulfonylimido)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 lithium bis(trifluoromethyl(S-trifluoromethylsulfonylimide)sulfonyl)imide ([(CF 3 (CF 3 SO 2 N)SO) 2 N]Li formula (Ⅴ)), but this synthetic route is only suitable for preparing symmetrical target products (US6340716B1)

[0020] So far, the relevant "S-fluoroalkylsulfonylimide (R F SO 2 There are few reports on the synthesis of fluoroalkylsulfonylimides and their derivatives with N=S)” group, and the existing preparation methods have disadvantages 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 been reported yet

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

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