Double-center bipyridyl ionic liquid and preparation method thereof, electrolyte and lithium-ion battery

An ionic liquid and bipyridine technology, applied in the field of electrochemistry, can solve the problems of slow research progress, and achieve the effects of improving stability, excellent electrochemical performance, and enriching varieties.

Inactive Publication Date: 2016-06-01
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 bipyridyl ionic liquid and preparation method thereof, electrolyte and lithium-ion battery
  • Double-center bipyridyl ionic liquid and preparation method thereof, electrolyte and lithium-ion battery
  • Double-center bipyridyl ionic liquid and preparation method thereof, electrolyte and lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) The dual-center bipyridine ionic liquid provided in Example 1 is specifically: dimethoxyethyl bipyridine tetrafluoroborate ionic liquid, and its structural formula is:

[0045]

[0046] (2) The preparation method of above-mentioned dimethoxyethyl bipyridine tetrafluoroborate ionic liquid, comprises the following steps:

[0047] (a) preparation of dimethoxyethyl bipyridyl chloride salt:

[0048] 1mol (ie 156g) of bipyridine and 2.2mol (ie 108g) of methoxychloroethane were added to a 250mL flask. in N 2 or Ar 2 Under the protection of atmosphere, the temperature was raised to 70°C, and the reaction was stirred for 40 h, then left to cool and washed three times with ethyl acetate. Vacuum drying at 80° C. gave a pale yellow solid, dimethoxyethyl bipyridyl chloride.

[0049] (b) Preparation of dimethoxyethyl bipyridine tetrafluoroborate ionic liquid:

[0050] In the 250mL flask, add 0.5mol (ie 172.6g) dimethoxyethyl bipyridyl chloride salt prepared in step (a), 1...

Embodiment 2

[0056] (1) The dual-center bipyridine ionic liquid provided in Example 2 is specifically: dimethoxypropyl bipyridine hexafluorophosphate ionic liquid, and its structural formula is:

[0057]

[0058] (2) The preparation method of above-mentioned dimethoxypropyl bipyridine hexafluorophosphate ionic liquid, comprises the following steps:

[0059] (a) preparation of dimethoxypropyl bipyridyl bromide:

[0060] 1mol (ie 156g) of bipyridine and 2.1mol (ie 321.4g) of methoxybromopropane were added to a 250mL flask. 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, and then left to cool and washed three times with ethyl acetate. Vacuum drying at 80°C gave a light yellow solid which is dimethoxypropyl bipyridyl bromide.

[0061] (b) Preparation of dimethoxypropyl bipyridine hexafluorophosphate ionic liquid:

[0062] In the 250mL flask, add 0.5mol (231.1g) dimethoxypropyl bipyridyl bromide salt prepared by s...

Embodiment 3

[0068] (1) The dual-center bipyridine ionic liquid provided in Example 3 is specifically: dimethoxybutylpyridine trifluoromethanesulfonimide salt ionic liquid, and its structural formula is

[0069]

[0070] The preparation method of the above-mentioned dimethoxybutylpyridine trifluoromethanesulfonimide salt ionic liquid comprises the following steps:

[0071] (a) preparation of dimethoxybutylpyridinium iodide salt:

[0072] 1mol (ie 156g) of bipyridine and 2.3mol (ie 492.2g) of methoxy iodobutane were added to a 250mL flask. Under the protection of N2 or Ar2 atmosphere, the temperature was raised to 80° C., the reaction was stirred for 20 h, left to cool and washed three times with ethyl acetate. Dry in vacuo at 80°C to obtain light yellow solid which is dimethoxybutylpyridinium iodide salt.

[0073] (b) Preparation of dimethoxybutylpyridine trifluoromethanesulfonimide salt ionic liquid:

[0074] In the 250mL flask, add 0.5mol (ie 292.1g) dimethoxybutylpyridinium iodide...

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Abstract

The invention relates to a double-center bipyridine ionic liquid. The general formula of the ionic liquid is as shown in the formula (I), wherein Y is a tetrafluoroboric acid anion, a hexafluorophosphoric acid anion, a trifluoromethane sulfonic imide anion or an imide acid anion; and R is methoxy alkyl with a general formula (II), n is 2, 3 or 4. The invention also relates to a preparation method of the double-center bipyridine ionic liquid, and an electrolyte and a lithium ion battery prepared from the double-center bipyridine ionic liquid. A double-center bipyridine frame model is adopted in the prepared double-center bipyridine ionic liquid, so that the ionic liquid has structure designability, and the types of the ionic liquid are enriched. Furthermore, the electrolyte and the lithium ion battery prepared from the double-center bipyridine ionic 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 bipyridyl ionic liquids and a preparation method thereof. The invention also relates to an electrolyte solution and a lithium ion battery prepared by using the double-center bipyridine 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 research on ionic liqu...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C07D213/04C07C311/48C07C309/06C07C303/40C07C303/32H01M10/0566H01M10/0525
CPCC07D213/04H01M10/0525H01M10/0566Y02E60/10
Inventor周明杰刘大喜王要兵钟玲珑
OwnerOCEANS KING LIGHTING SCI&TECH CO LTD