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Lithium battery imidazole ion electrolyte solution and preparation method thereof

An electrolyte and lithium battery technology, applied in the direction of electrolyte battery manufacturing, batteries, electrolytes, etc., can solve the problems of lithium battery development difficulties, volatile electrolyte, safety accidents, etc., achieve good thermal stability, improve cycle performance, improve Effect of charge and discharge capacity and efficiency

Inactive Publication Date: 2018-06-29
湖南法恩莱特新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the electrolyte solution of commercially used lithium batteries is wastewater electrolyte solution containing mixed solvents of ionic liquids such as ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, etc., but this kind of electrolyte is volatile and easily Inflammation, misuse or overcharging may lead to safety accidents
This has caused difficulties for the development of lithium batteries in new energy power

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An imidazolium ion electrolyte solution for a lithium battery comprises a lithium salt, an ionic liquid mixed solvent and functional additives. The lithium salt is lithium tetrafluoroborate, and the usage amount is 1mol / L; the ionic liquid mixed solvent is 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF 4 ), a mixture of γ-butyrolactone; the functional additive is vinylene carbonate, and the amount used is 5% of the mass of the ionic liquid mixed solvent.

[0029] A preparation method for lithium battery imidazolium ion electrolyte, comprising the following steps:

[0030] Step 1: Preparation of 1-butyl-3-methylimidazolium tetrafluoroborate

[0031] A. Raw material preparation: Dry the raw materials N-methylimidazole, n-butane bromide, ethyl acetate, and acetone with activated molecular sieves before use;

[0032] B. Preparation of intermediates: According to the molar ratio of N-methylimidazole and brominated n-butane 1:1.0, put N-methylimidazole and brominat...

Embodiment 2

[0042] An imidazolium ion electrolyte solution for a lithium battery comprises a lithium salt, an ionic liquid mixed solvent and functional additives. The lithium salt is lithium tetrafluoroborate, and the usage amount is 1mol / L; the ionic liquid mixed solvent is 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF 4 ), a mixture of γ-butyrolactone; the functional additive is a mixed liquid of vinylene carbonate and vinyl sulfite, the volume ratio of vinylene carbonate and vinyl sulfite is 1:1, and the amount of functional additive used is ionic liquid 3% of the mass of the mixed solvent.

[0043] A preparation method for lithium battery imidazolium ion electrolyte, comprising the following steps:

[0044] Step 1: Preparation of 1-butyl-3-methylimidazolium tetrafluoroborate

[0045] A. Raw material preparation: Dry the raw materials N-methylimidazole, n-butane bromide, ethyl acetate, and acetone with activated molecular sieves before use;

[0046] B. Preparation of inter...

Embodiment 3

[0056] An imidazolium ion electrolyte solution for a lithium battery comprises a lithium salt, an ionic liquid mixed solvent and functional additives. The lithium salt is lithium tetrafluoroborate, and the usage amount is 1mol / L; the ionic liquid mixed solvent is 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF 4 ), a mixture of γ-butyrolactone; the functional additive is acrylocyanide, and the dosage of the functional additive is 7% of the mass of the ionic liquid mixed solvent.

[0057] A preparation method for lithium battery imidazolium ion electrolyte, comprising the following steps:

[0058] Step 1: Preparation of 1-butyl-3-methylimidazolium tetrafluoroborate

[0059] A. Raw material preparation: Dry the raw materials N-methylimidazole, n-butane bromide, ethyl acetate, and acetone with activated molecular sieves before use;

[0060] B. Preparation of intermediates: According to the molar ratio of N-methylimidazole and brominated n-butane 1:1.3, put N-methylimida...

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Abstract

The invention discloses a lithium battery imidazole ion electrolyte solution and a preparation method thereof, wherein the lithium battery imidazole ion electrolyte solution comprises a lithium salt,an ionic liquid mixed solvent and a functional additive. Compared with the prior art, the lithium battery imidazole ion electrolyte solution has the beneficial effects that the imidazole ion electrolyte solution is difficult to volatilize, good in thermal stability and high in electrical conductivity; with the addition of the functional additive, the circulation performance of the electrolyte solution is improved, and the charge and discharge capacity and the efficiency of a battery are improved.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a lithium battery imidazolium ion electrolyte and a preparation method thereof. Background technique [0002] Lithium-ion batteries are an important part of the development of new energy power, especially in electric vehicles, fuel and battery hybrid vehicles. At present, the electrolyte solution of commercially used lithium batteries is wastewater electrolyte solution containing mixed solvents of ionic liquids such as ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, etc., but this kind of electrolyte is volatile and easily Inflammation, misuse or overcharging can easily lead to safety accidents. This has caused difficulties for the development of lithium batteries in new energy power. Contents of the invention [0003] The object of the present invention is just to overcome above-mentioned deficiency, provides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0569H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0567H01M10/0569H01M10/058H01M2220/20H01M2300/0037Y02E60/10Y02P70/50
Inventor 邵俊华孔东波张利娟郭飞闫国锋李海杰侯红歧谢佳庆乔文忠
Owner 湖南法恩莱特新能源科技有限公司
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