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Boron trifluoride salt electrolyte and preparation and application thereof

A technology of boron trifluoride and electrolytes, which is applied in the direction of chemical instruments and methods, circuits, electrical components, etc., can solve problems such as correlation or deducibility uncertainty, and achieve improved electrochemical performance, high ionic conductivity, and improved The effect of cycle performance

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 type of structure is special, it has a chain structure and two -OBF 3 Compounds in which M is attached to two atoms in the ring are so different in structure and properties that the relationship or inference between them is uncertain

Method used

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  • Boron trifluoride salt electrolyte and preparation and application thereof
  • Boron trifluoride salt electrolyte and preparation and application thereof
  • Boron trifluoride salt electrolyte and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1: raw material

[0068] Preparation method: under a nitrogen atmosphere, mix 0.01 mol of raw materials and boron trifluoride tetrahydrofuran complex (2.8 g, 0.02 mol) in 15 ml of ethylene glycol dimethyl ether, and react 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 45°C for 10 hours, and dry the resulting mixture under reduced pressure at 40°C and vacuum degree 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 78%, NMR as figure 1 shown.

Embodiment 2

[0069] Embodiment 2: raw material

[0070] Preparation method: under argon atmosphere, mix 0.01mol of the raw material and boron trifluoride etherate complex (2.98g, 0.021mol) in 15ml of THF, and react 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 86%, NMR such as figure 2 shown.

Embodiment 3

[0071] Embodiment 3: raw material

[0072] Preparation method: Under a nitrogen atmosphere, take the raw materials 3,5-dibenzyloxyphenylglyoxal hydrate (3.64g, 0.01mol) and lithium methoxide (0.76g, 0.02mol), mix them with 20ml of methanol, and react at room temperature 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. Add boron trifluoride tetrahydrofuran complex (3.07g, 0.022mol) and 15mlTHF to the intermediate, stir at room temperature for 9 hours, and dry the resulting mixture under reduced pressure at 30°C and a vacuum of about -0.1MPa , the resulting solid was washed three times with isopropyl ether, filtered and dried to give the product M3. Yield 77%, NMR as image 3 shown.

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Abstract

The present invention relates to a boron trifluoride salt electrolyte and preparation and application thereof, the electrolyte comprises a boron trifluoride salt represented by the following general formula I: wherein, represents a ring, the ring comprises a single ring or a multi-ring formed by at least two single rings, and M is a metal cation; e1, E2 and E3 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 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 discharge capacity of batteries, that is,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C07F7/08H01M10/0565H01M10/0567H01M10/0568
CPCC07F5/022C07F5/025C07F7/081C07F7/083H01M10/0567H01M10/0568H01M10/0565
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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