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Electrolyte containing sulfenyl boron trifluoride salt and preparation method and application thereof

A technology of sulfur-based boron trifluoride and boron trifluoride, which is applied in the field of electrolytes containing sulfur-based boron trifluoride salts and its preparation, can solve problems such as correlation or deducibility uncertainty, and achieve electrochemical Effects of performance improvement, widening electrochemical window, and improving cycle performance

Inactive Publication Date: 2022-06-21
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, which is related to the chain structure as well as the two-SBF 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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  • Electrolyte containing sulfenyl boron trifluoride salt and preparation method and application thereof
  • Electrolyte containing sulfenyl boron trifluoride salt and preparation method and application thereof
  • Electrolyte containing sulfenyl boron trifluoride salt and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Embodiment 2: raw material

[0076] 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, Q being -S-BF 3 Li. The yield was 82%, NMR such as figure 2 shown.

Embodiment 2

[0077] Embodiment 3: raw material

[0078] Preparation method: Under a nitrogen atmosphere, take 0.01mol of the raw material and lithium methoxide (0.76g, 0.02mol), mix well with 20ml of methanol, and react at room temperature for 13 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 15ml THF to the intermediate, stir and react at room temperature for 12 hours, and depressurize the resulting mixture at 30°C and a vacuum of about -0.1MPa After drying, the resulting solid was washed three times with isopropyl ether, filtered, and dried to give the product M3, Q being -S-BF 3 Li. Yield 84%, NMR as image 3 shown.

Embodiment 3

[0079] Embodiment 4: raw material

[0080] Preparation method: under an argon atmosphere, mix 0.01 mol of raw materials and boron trifluoride tetrahydrofuran complex (3.07 g, 0.022 mol) in 15 ml 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 12 hours, 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 M4, Q being -S-BF 3 Li. The yield was 84%, NMR as Figure 4 shown.

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Abstract

The invention relates to an electrolyte containing sulfenyl boron trifluoride salt and a preparation method and application thereof, the electrolyte comprises boron trifluoride salt represented by the following general formula I: wherein, the electrolyte represents a ring, the ring comprises a single ring or a multi-ring composed of 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. The boron trifluoride salt provided by the invention can be used as an additive and also can be used as a salt in the electrolyte. The material can be applied to liquid batteries, solid-liquid hybrid batteries, semi-solid batteries, gel batteries, quasi-solid-state batteries and all-solid-state batteries, and is helpful for improving the energy density and the cycle stability of the batteries and prolonging the service life of the batteries. The raw materials are low in price, the synthesis process is simple, and good economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an electrolyte containing sulfur-based boron trifluoride salts and a preparation method and application thereof. Background technique [0002] Due to the widespread application of portable electronic devices and the increasing popularity of electric vehicles, secondary batteries have received considerable attention over the past few decades. High-energy-density secondary batteries occupy a large market in mobile phones, portable electronic products, and electric vehicles. However, the demand for large-scale energy storage in the future will further increase the capacity and energy density of batteries, and the requirements for battery materials Also keep improving. [0003] Taking lithium batteries as an example, in order to increase the energy density of the battery, it is necessary to increase the working voltage and discharge capacity of the battery, and use high-voltage, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/42H01M10/0567H01M10/0568H01M10/0569
CPCH01M10/0565H01M10/4235H01M10/0567H01M10/0568H01M10/0569H01M2300/0025
Inventor 俞会根杨萌程勇斌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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