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Method for preparing pentacyclic anion salt

A technology of salinization and carbon atom is applied in the field of 1-trifluoromethyl-4,5-dicarbonitrile-imidazolyl lithium to prepare electrolyte compositions containing this salt, which can solve problems such as safety and achieve good The effect of yield

Active Publication Date: 2014-07-16
ARKEMA FRANCE SA
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Problems solved by technology

[0003] The most commonly used salt is lithium hexafluorophosphate (LiPF6), which has many of the desirable qualities, but has the disadvantage of degrading in the form of hydrogen fluoride gas
This creates safety concerns, especially with the upcoming use of lithium-ion batteries in personal vehicles

Method used

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  • Method for preparing pentacyclic anion salt
  • Method for preparing pentacyclic anion salt
  • Method for preparing pentacyclic anion salt

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preparation example Construction

[0062] Preparation of imidazolyllithium

[0063] The imidazolyllithium of the following formula is prepared from the imidazole compound of (III) by reacting the imidazole compound of formula (III) with a lithium base:

[0064]

[0065] The lithium base is preferably selected from lithium hydride, lithium carbonate and lithium hydroxide and combinations thereof.

[0066] For example, when the imidazole compound has been isolated and purified as described above after the reaction, the obtained organic phase can be extracted with an aqueous solution of a lithium base. The aqueous phase can then be evaporated (after optional treatment with activated carbon).

[0067] The organic phase thus contains compound (III) together with the acid catalyst and remaining YH dissolved in the reaction solvent. Then, compound (III) is at a concentration of preferably 0.01 to 5 mol / L and preferably 0.1 to 3 mol / L. The concentration of the lithium base in the aqueous phase is preferably 0.0...

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Abstract

The invention relates to a method for preparing an imidazole compound with the following formula: wherein Rf is a fluorinated alkyl group comprising between 1 and 5 carbon atoms, said method comprising: (a) the reaction of the diaminomaleonitrile with the following formula: with the compound with the following formula: wherein Y represents a chlorine atom or the OCORf group to form the salified amide compound with the following formula: at temperature Tau1, and (b) the dehydration of the salified amide compound with formula (IVa) and / or the corresponding amino (IVb) to form the imidazole compound with formula (III), at temperature T2 higher than T1.

Description

technical field [0001] The present invention relates to processes for the preparation of salts of pentacyclic anions, and in particular lithium 1-trifluoromethyl-4,5-dicarbonitrile-imidazolyl, as well as processes for the preparation of electrolyte compositions comprising such salts. Background technique [0002] A lithium-ion battery includes at least a negative electrode, a positive electrode, a separator, and an electrolyte. The electrolyte consists of a lithium salt dissolved in a solvent, usually a mixture of organic carbonates, in order to have a good compromise between viscosity and dielectric constant. [0003] The most commonly used salt is lithium hexafluorophosphate (LiPF6), which has many of the desirable qualities, but has the disadvantage of degrading in the form of hydrogen fluoride gas. This creates safety concerns, especially with the upcoming use of lithium-ion batteries in personal vehicles. [0004] Therefore, other salts have been developed to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/90H01G9/035H01M10/0568
CPCC07D233/90H01G11/62H01M10/0568H01M10/0525C07C253/30Y02E60/10C07C255/30Y02E60/13
Inventor G.施密特M.弗拉斯奎
Owner ARKEMA FRANCE SA
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