Double-center quaternary ammonium salt ion liquid, preparation method thereof, electrolyte and lithium ion battery

A technology of ionic liquids and quaternary ammonium salts, applied in the field of electrochemistry, can solve problems such as slow research progress, and achieve the effects of improving stability, excellent electrochemical performance, and enriching types

Inactive Publication Date: 2014-07-02
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first ionic liquid, nitroethylamine, was discovered as early as 1914, but research in this field has progressed slowly since then

Method used

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  • Double-center quaternary ammonium salt ion liquid, preparation method thereof, electrolyte and lithium ion battery
  • Double-center quaternary ammonium salt ion liquid, preparation method thereof, electrolyte and lithium ion battery
  • Double-center quaternary ammonium salt ion liquid, preparation method thereof, electrolyte and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) The dual-center quaternary ammonium salt ionic liquid provided in the present embodiment 1 is specifically: N, N'-dimethoxyethyltetramethylethylenediammonium tetrafluoroborate ionic liquid, and its structural formula is:

[0045]

[0046] (2) the preparation method of above-mentioned N, N'-dimethoxyethyltetramethylethylenediammonium tetrafluoroborate ionic liquid, comprises the following steps:

[0047] (a) N, the preparation of N'-dimethoxyethyltetramethylethylenediammonium chloride salt:

[0048] Add 1mol (ie 116.2g) tetramethylethylenediamine and 2.2mol (ie 108g) methoxychloroethane into a 250mL flask respectively. in N 2 or Ar 2 Under the protection of atmosphere, the temperature was raised to 70° C., the reaction was stirred for 40 h, and then left to cool and the mixture was washed three times with ethyl acetate. Vacuum drying at 80°C gave a light yellow solid which was N,N'-dimethoxyethyltetramethylethylenediammonium chloride.

[0049] (b) N, the prepa...

Embodiment 2

[0056] (1) The dual-center quaternary ammonium salt ionic liquid provided in Example 2 is specifically: N, N'-dimethoxypropyltetramethylpropylenediammonium hexafluorophosphate ionic liquid, and its structural formula is:

[0057]

[0058] (2) the preparation method of above-mentioned N, N'-dimethoxypropyltetramethylpropylenediammonium hexafluorophosphate ionic liquid, comprises the following steps:

[0059] (a) N, the preparation of N'-dimethoxypropyltetramethylpropanediammonium bromide:

[0060] Add 1 mol (ie 130.2 g) of tetramethylpropylenediamine and 2.1 mol (ie 321.4 g) of methoxybromopropane into a 250 mL flask respectively. in N 2 or Ar 2 Under the protection of atmosphere, the temperature was raised to 60° C., the reaction was stirred for 60 h, then left to cool and washed three times with ethyl acetate. Vacuum drying at 80°C gave a pale yellow solid which was N,N'-dimethoxypropyltetramethylpropanediammonium bromide.

[0061] (b) Preparation of double center quat...

Embodiment 3

[0068] (1) The dual-center quaternary ammonium salt ionic liquid provided in Example 3 is specifically: N, N'-dimethoxybutyltetramethylhexamethylenediamine trifluoromethanesulfonimide ionic liquid, which The structural formula is:

[0069]

[0070] (2) the preparation method of above-mentioned N, N'-dimethoxybutyltetramethylhexamethylenediamine trifluoromethanesulfonimide salt ionic liquid, comprises the following steps:

[0071] (a) N, the preparation of N'-dimethoxybutyltetramethylhexamethylenediamine iodide salt:

[0072] Add 1 mol (ie 172.3 g) of tetramethylhexamethylenediamine and 2.3 mol (ie 492.2 g) of methoxybutane iodide into a 250 mL flask respectively. in N 2 or Ar 2 Under the protection of the atmosphere, the temperature was raised to 80° C., the reaction was stirred for 20 h, left to cool and the mixture was washed three times with ethyl acetate. Vacuum drying at 80°C gave a light yellow solid which was N,N'-dimethoxybutyltetramethylhexamethylenediamine iod...

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Abstract

The invention relates to a double-center quaternary ammonium salt ion liquid. The ion liquid has a general formula (I), wherein m represents 2, 3 or 6; Y represents tetrafluoroboric acid anion, hexafluorophosphoric acid anion, trifluoromethyl sulfimide anion or trifluoromethane sulfonic acid anion; R represents methoxy alkyl having a general formula (II), wherein n is 2, 3 or 4. The invention further relates to a preparation method of the double-center quaternary ammonium salt ion liquid as well as ion liquid electrolyte and a lithium ion battery prepared from the double-center quaternary ammonium salt ion liquid. The double-center quaternary ammonium salt ion liquid has the beneficial effects that by utilizing a skeleton form of double-center quaternary ammonium salt, the ion liquid has structural designability, and the species of ion liquids is enriched; besides, the ion liquid electrolyte and the lithium ion battery prepared from the double-center quaternary ammonium salt ion liquid have excellent electrochemical performance.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a class of double-center quaternary ammonium salt ionic liquid and a preparation method thereof. The invention also relates to an electrolyte and a lithium ion battery prepared by using the double-center quaternary ammonium salt ionic liquid. Background technique [0002] Ionic liquids are liquids at room temperature (generally below 100°C) and are composed of organic cations and inorganic anions or organic anions. Ionic liquids are adjustable, and changing their anion and cation structures according to different needs can achieve the designer's purpose, so ionic liquids are called the designer's solvent. The first ionic liquid, nitroethylamine, was discovered as early as 1914, but the research progress in this field has been slow since then. Until 1992, the research group led by Wikes synthesized 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid ([EMIM]BF 4 ), the res...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C07C217/08C07C311/48C07C309/06C07C213/08C07C303/40C07C303/32H01M10/0566H01M10/0525
CPCY02E60/122Y02E60/10
Inventor周明杰刘大喜王要兵钟玲珑
OwnerOCEANS KING LIGHTING SCI&TECH CO LTD