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Sulfur-based unsaturated heterochain boron trifluoride salt electrolyte as well as preparation method and application thereof

A boron trifluoride, unsaturated technology, applied in the field of sulfur-based unsaturated heterochain boron trifluoride salt electrolyte and its preparation, can solve problems such as uncertainty of correlation or inference, and achieve improved electrochemical performance , broaden the electrochemical window and improve the effect of 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

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Problems solved by technology

This is because the unsaturated heterochain contains both heteroatoms and unsaturated bonds, and its own chemical properties such as electrical properties are also relatively special, and the two strongly polar -SBF 3 When M is connected to an unsaturated heterochain, it will also affect the chemical and physical properties of the entire chain, which are substantially different from rings and other types of chain structures, so the relationship between them may be deduced sexual uncertainty

Method used

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  • Sulfur-based unsaturated heterochain boron trifluoride salt electrolyte as well as preparation method and application thereof
  • Sulfur-based unsaturated heterochain boron trifluoride salt electrolyte as well as preparation method and application thereof
  • Sulfur-based unsaturated heterochain boron trifluoride salt electrolyte as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Example 1: Raw materials

[0070] Preparation method: under nitrogen atmosphere, mix 0.01 mol of raw material 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 under the conditions of 40° C. and a vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. Lithium ethoxide (1.04g, 0.02mol) was dissolved in 10ml of ethanol and slowly added to the intermediate, stirred at 45°C for 8 hours, and the resulting mixture was dried 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 product M1, and Q was -S-BF 3 Li. The yield was 80%, NMR as figure 1 shown.

Embodiment 2

[0071] Example 2: Raw materials

[0072] Preparation method: under argon atmosphere, metal lithium sheet (0.14g, 0.02mol) was slowly added to 0.01mol of raw material, reacted at room temperature for 3 hours, then heated to 50°C until the reaction of lithium sheet was complete to obtain an intermediate. Boron trifluoride butyl ether complex (3.96g, 0.02mol) and 10ml THF were added to the intermediate, and the reaction was stirred at room temperature for 10 hours. Drying under reduced pressure, the obtained solid was washed three times with isopropyl ether, filtered and dried to obtain product M2, Q is -S-BF 3 Li. The yield was 81%, NMR as figure 2 shown.

Embodiment 3

[0073] Example 3: Raw materials

[0074] Preparation method: under argon atmosphere, mix 0.01 mol of raw material and boron trifluoride ether complex (2.98 g, 0.021 mol) in 15 ml of THF, and react at room temperature for 12 hours. The obtained mixed solution was dried under reduced pressure under the conditions of 30° C. and a vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. 14ml of butyllithium in hexane solution (c=1.6mol / L) was added to the intermediate, and the reaction was stirred at room temperature for 6 hours. The obtained mixed solution was dried under reduced pressure at 30°C and a vacuum degree of about -0.1MPa. The obtained crude product was washed 3 times with cyclohexane, filtered and dried to obtain the product M3, and Q was -S-BF 3 Li. The yield was 83%, NMR as image 3 shown.

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Abstract

The invention relates to a sulfenyl unsaturated heterochain boron trifluoride salt electrolyte and a preparation method and application thereof, the electrolyte comprises the following general formula I: in the general formula I, R or R1 is independently none or one chain, and R and R1 are not none at the same time; r2 and R3 are independently null or a second chain; m is a metal cation; the first chain, the second chain and the chain substituent contain at least one heteroatom and at least one unsaturated bond. The boron trifluoride salt can be used as an additive and a salt in an electrolyte, and can be used as a single-ion conductor polymer electrolyte and a high-molecular skeleton after being polymerized for a polymerizable monomer. The structure 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 helpful for 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 invention relates to the technical field of batteries, in particular to a sulfur-based unsaturated heterochain boron trifluoride salt electrolyte and a preparation method and application thereof. Background technique [0002] Secondary batteries have received extensive attention over the past few decades due to the widespread application of portable electronic devices and the growing popularity of electric vehicles. Secondary batteries with high energy density 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 improve the energy density of the battery, it is necessary to improve the working voltage and discharge capacity of the battery, and use high-volt...

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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