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Multi-element sulfenyl boron trifluoride salt electrolyte as well as preparation method and application thereof

A boron trifluoride and electrolyte technology, applied in organic electrolytes, non-aqueous electrolytes, chemical instruments and methods, etc., to achieve the effects of widening the electrochemical window, increasing the discharge specific capacity, and improving electrochemical performance

Inactive Publication Date: 2022-06-10
BEIJING WELION NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Multi-element sulfenyl boron trifluoride salt electrolyte as well as preparation method and application thereof
  • Multi-element sulfenyl boron trifluoride salt electrolyte as well as preparation method and application thereof
  • Multi-element sulfenyl boron trifluoride salt electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] raw material Among them, Q means

[0158] Preparation method: under nitrogen atmosphere, mix 0.01mol of the raw material and boron trifluoride tetrahydrofuran complex (5.6g, 0.04mol) in 15ml 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 (2.08g, 0.04mol) in 10ml of ethanol and slowly add it to the intermediate, stir and react at 45°C for 8 hours, and dry the resulting mixture under reduced pressure at 45°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 with a yield of 94%. figure 1 shown.

Embodiment 2

[0160] raw material Among them, Q means

[0161] Preparation method: under argon atmosphere, mix 0.01mol of the raw material and boron trifluoride etherate complex (5.68g, 0.04mol) in 15ml of THF (tetrahydrofuran), 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 25ml 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 with a yield of 90%. figure 2 shown.

Embodiment 3

[0163] raw material Among them, Q means

[0164] Preparation method: Under a nitrogen atmosphere, take 0.01mol of the raw material and lithium methoxide (1.52g, 0.04mol), mix well with 20ml of methanol, and react 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 (5.58g, 0.04mol) and 15ml THF (tetrahydrofuran) were added to the intermediate, and the reaction was stirred at room temperature for 16 hours. Drying under reduced pressure, the obtained solid was washed three times with isopropyl ether, filtered and dried to obtain the product M3 with a yield of 87%.

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Abstract

The invention provides a multi-element sulfenyl boron trifluoride salt electrolyte as well as a preparation method and application thereof. The multi-element sulfenyl boron trifluoride salt electrolyte comprises boron trifluoride salt as shown in the following general formula I. The invention further discloses a preparation method of the multi-element sulfenyl boron trifluoride salt electrolyte. Wherein the multi-element sulfenyl boron trifluoride salt can be used as an additive and can also be used as a salt in the electrolyte. When being used as an electrolyte additive, the electrolyte additive can significantly improve the first efficiency and cycle performance of a battery; and when being used as a salt in an electrolyte, the compound has relatively good ion transmission property and stable electrochemical performance. The boron trifluoride salt provided by the invention can be applied to a liquid battery, a solid-liquid hybrid battery, a semi-solid battery, a gel battery, a quasi-solid-state battery and an all-solid-state battery, and is beneficial to improving the energy density and the cycle stability of the battery and prolonging the service life of the battery. The raw materials are low in price, the synthesis process is simple, and good economic benefits are achieved.

Description

technical field [0001] The present application relates to the field of battery technology, in particular to a polynary sulfur-based boron trifluoride salt electrolyte and its preparation method and application. Background technique [0002] With the rapid development of society, the demand for sustainable energy is increasing. A secondary battery is an energy storage / conversion system that not only stores renewable energy such as wind, hydro, and solar energy, but also stores electrical energy when the grid is in surplus. What's more, it can release energy whenever and wherever it is needed. In addition, with the promotion of social development, there is an urgent need to further improve the energy density, cycle stability and safety of secondary batteries. [0003] Taking lithium batteries as an example, in order to increase the energy density of the battery, it is necessary to use high-voltage and high-capacity positive electrode materials and low-voltage high-capacity n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C07F7/04C07F9/655C07H23/00C07H1/00H01M10/0525H01M10/0567
CPCC07F5/022C07F9/6552C07H23/00C07H1/00H01M10/0525H01M10/0567H01M2300/0025
Inventor 杨萌程勇斌俞会根
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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