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Electrolyte containing saturated carbocyclic sulfenyl organic salt as well as preparation method and application of electrolyte

A technology for electrolytes and organic salts, which is applied in the field of electrolytes containing saturated carbocyclic sulfur-like organic salts and its preparation, can solve problems such as not much research results and no industrial application results, and achieve excellent electrochemical performance. Effects of improved chemical properties and high ionic conductivity

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

But it is a complex compound, not a sulfur-based salt, and there are not many research results, let alone industrial application results

Method used

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  • Electrolyte containing saturated carbocyclic sulfenyl organic salt as well as preparation method and application of electrolyte
  • Electrolyte containing saturated carbocyclic sulfenyl organic salt as well as preparation method and application of electrolyte
  • Electrolyte containing saturated carbocyclic sulfenyl organic salt as well as preparation method and application of electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Example 1: Raw materials

[0071] 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, the reaction was stirred at 45°C for 8 hours, and the resulting mixture was dried under reduced pressure at 45°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 79%, NMR as figure 1 shown.

Embodiment 2

[0072] Example 2: Raw materials

[0073] Preparation method: under argon atmosphere, mix 0.01mol of raw material and boron trifluoride ether complex (2.98g, 0.021mol) in 15ml of THF (tetrahydrofuran), and react at room temperature for 12 hours. Under the condition of vacuum degree of about -0.1MPa, the solvent is removed by drying under reduced pressure to obtain an intermediate. 14ml of butyllithium in hexane solution (c=1.6mol / L) was added to the intermediate, the reaction was stirred at room temperature for 6 hours, and the resulting mixed solution was dried under reduced pressure at 40°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 M2, where Q was -S-BF 3 Li. The yield was 87%, NMR as figure 2 shown.

Embodiment 3

[0074] Example 3: Raw materials

[0075] Preparation method: under nitrogen atmosphere, take 0.01 mol of raw material and lithium methoxide (0.76 g, 0.02 mol), mix well with 20 ml of methanol, and react at room temperature for 8 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. The boron trifluoride tetrahydrofuran complex (3.07g, 0.022mol) and 15ml of THF (tetrahydrofuran) were added to the intermediate, and the reaction was stirred at room temperature for 12 hours. Drying under reduced pressure, the obtained solid was washed three times with isopropyl ether, filtered and dried to obtain product M3, Q is -S-BF 3 Li. Yield 86%, NMR as image 3 shown.

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Abstract

The invention relates to an electrolyte containing a saturated carbocyclic sulfur-based organic salt, and a preparation method and application thereof. The electrolyte comprises the saturated carbocyclic sulfur-based boron trifluoride organic salt represented by the following general formula I. In the general formula I, a saturated ring is represented, and atoms forming the saturated ring are carbon; 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. The boron trifluoride organic salt can be used as an additive and a salt in an electrolyte, can be applied to a liquid battery, a solid-liquid hybrid battery, a semi-solid battery, a gel battery, a quasi-solid 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 invention relates to the technical field of batteries, in particular to an electrolyte containing a saturated carbocyclic sulfur-based organic salt 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 requirements 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, a...

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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