Boron trifluoride salt electrolyte containing unsaturated heterocyclic ring and preparation and application thereof

A boron trifluoride, unsaturated technology, applied in the field of boron trifluoride salt electrolytes, can solve problems such as correlation or deducibility uncertainty, and achieve inhibition of electrolyte decomposition, high ionic conductivity, and excellent electrochemical performance effect

Inactive Publication Date: 2022-03-25
BEIJING WELION NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the electrical and other chemical properties of heteroatoms and unsaturated bonds are relatively special. When they exist on the ring, they will affect the chemical and physical properties of the entire ring. etc. are substantially different, so the relevance or inference between each other is uncertain

Method used

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  • Boron trifluoride salt electrolyte containing unsaturated heterocyclic ring and preparation and application thereof
  • Boron trifluoride salt electrolyte containing unsaturated heterocyclic ring and preparation and application thereof
  • Boron trifluoride salt electrolyte containing unsaturated heterocyclic ring and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: raw material

[0067] Preparation method: under nitrogen atmosphere, complex the raw material 3-hydroxy-2-(1-hydroxyethyl)-1,6-dimethylpyridin-4-one (1.83g, 0.01mol) with boron trifluoride tetrahydrofuran The compound (2.8g, 0.02mol) was mixed uniformly in 15ml of ethylene glycol dimethyl ether, and reacted at room temperature for 12 hours. The obtained mixed solution was dried under reduced pressure at 40° C. and a vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. Dissolve lithium ethoxide (1.04g, 0.02mol) in 10ml of ethanol and slowly add it to the intermediate, stir and react at room temperature for 8 hours, and dry the resulting mixture under reduced pressure at 40°C and a vacuum of about -0.1MPa , The obtained solid was washed three times with n-butyl ether, filtered and dried to obtain the product M1. Yield was 79%, NMR as figure 1 shown.

Embodiment 2

[0068] Embodiment 2: raw material

[0069]Preparation method: Under argon atmosphere, the raw material 3-hydroxy-2-hydroxymethyl-1-methyl-6-(2,2,2-trifluoroethyl)-1H-pyridin-4-one (2.37g , 0.01mol) and boron trifluoride etherate (2.98g, 0.021mol) were mixed uniformly in 15ml THF, and reacted at room temperature for 12 hours. The resulting mixed solution was dried under reduced pressure at 30° C. and a vacuum of about −0.1 MPa to remove the solvent to obtain an intermediate. Add 14ml of butyllithium hexane solution (c=1.6mol / L) to the intermediate, stir and react at room temperature for 6 hours, and dry the resulting mixture under reduced pressure at 40°C and a vacuum of about -0.1MPa. The obtained crude product was washed 3 times with cyclohexane, filtered and dried to obtain the product M2. The yield was 89%, NMR such as figure 2 shown.

Embodiment 3

[0070] Embodiment 3: raw material

[0071] Preparation method: Under a nitrogen atmosphere, take the raw material 3-hydroxy-2-(1-hydroxyethyl)-1-(2-piperidine)ethyl)pyridin-4(1H)-one (2.66g, 0.01mol) and Lithium methoxide (0.76g, 0.02mol) was mixed with 20ml of methanol and reacted at room temperature for 8 hours. The obtained mixed solution was dried under reduced pressure at 40° C. and a vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. Boron trifluoride tetrahydrofuran complex (3.07g, 0.022mol) was added to the intermediate, stirred at room temperature for 7 hours, and the resulting mixture was dried under reduced pressure at 40°C and a vacuum of about -0.1MPa to obtain The solid was washed three times with isopropyl ether, filtered and dried to give the product M3. Yield 82%, NMR as image 3 shown.

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Abstract

The invention relates to a boron trifluoride salt electrolyte containing an unsaturated heterocyclic ring and preparation and application thereof, the electrolyte comprises a boron trifluoride salt represented by the following general formula I: R'represents the unsaturated heterocyclic ring, and the unsaturated heterocyclic ring at least contains one heteroatom and at least contains one unsaturated bond at the same time; the heteroatom is selected from S, N, O, P, Se, Ca, Al, B or Si; m is a metal cation; e1 and E2 are independently null, a group, a chain structure or a ring-containing structure; r is a substituent group and represents that any H on a ring can be substituted by the substituent group, the substituent group can replace one H or two or more H, and if two or more H are substituted, the substituent groups can be the same or different. According to the electrolyte disclosed by the invention, two-OBF3M are creatively compounded in one compound, and preferably, OBF3M is connected with a carbon atom C. The boron organic compound can be used as an electrolyte salt and an additive, and has a good effect.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a boron trifluoride salt electrolyte containing an unsaturated heterocycle and its preparation and application. Background technique [0002] Electrolyte is an important and necessary component of secondary batteries. Lithium / sodium batteries have the advantages of high energy density, high voltage, many cycles, and long storage time. Since their commercialization, they have been widely used in electric vehicles, energy storage power stations, wireless Human-machine, portable equipment and other aspects, regardless of the application direction, there is an urgent need to improve the energy density and cycle performance of batteries on the premise of ensuring battery safety. [0003] Lithium / sodium batteries mainly include positive electrodes, negative electrodes, electrolytes, and separators. To increase the energy density of batteries is to increase the working voltage and dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02H01M10/0565H01M10/0567H01M10/0568
CPCC07F5/022H01M10/0567H01M10/0568H01M10/0565
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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