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Sulfur-based saturated carbon chain electrolyte as well as preparation method and application thereof

An electrolyte and liquid electrolyte technology, applied in organic electrolytes, non-aqueous electrolytes, circuits, etc., can solve problems such as uncertainty in correlation or inference, and achieve improved electrochemical performance, excellent electrochemical performance, and broadened electrochemical performance. window effect

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 is because its electrical properties and other chemical properties are quite special, and two strongly polar -SBF 3 When M is connected to a saturated carbon chain, 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, etc., so the correlation or deducibility between each other uncertain

Method used

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  • Sulfur-based saturated carbon chain electrolyte as well as preparation method and application thereof
  • Sulfur-based saturated carbon chain electrolyte as well as preparation method and application thereof
  • Sulfur-based saturated carbon chain electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: Raw materials M1

[0052] 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 at 45° C. and the vacuum degree was 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 16 hours, and the resulting mixed solution 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 85%, NMR as figure 1 shown.

Embodiment 2

[0053] Example 2: Raw materials M2

[0054] Preparation method: under argon atmosphere, metal lithium sheet (0.14 g, 0.02 mol) was slowly added to 0.01 mol of raw material, reacted at room temperature for 2 hours, and then heated to 50° C. until the lithium sheet reacted completely to obtain an intermediate. Boron trifluoride butyl ether complex (3.96g, 0.02mol) and 15ml THF (tetrahydrofuran) were added to the intermediate, and the reaction was stirred at 50°C for 12 hours. Drying under reduced pressure under the same conditions, 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 84%, NMR as figure 2 shown.

Embodiment 3

[0055] Example 3: Raw materials M3

[0056] Preparation method: under argon atmosphere, mix 0.01 mol of raw material and boron trifluoride diethyl ether complex (2.98 g, 0.021 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 50° 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 10 hours. The resulting mixed solution was dried 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 M3, and Q was -S-BF 3 Li. The yield was 82%, NMR as image 3 shown.

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Abstract

The invention relates to a sulfenyl saturated carbon chain electrolyte and a preparation method and application thereof, the electrolyte comprises boron trifluoride salt represented by the following general formula I: wherein R and R1 are independently a first chain without or containing at least one carbon atom; r and R1 are not none at the same time; r2 or R3 is independently a second chain free of or containing at least one carbon atom; m is a metal cation; the first chain and the second chain are both saturated carbon chains; h on any C in the first chain and the second chain can be independently substituted by 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 a sulfur-based saturated carbon chain 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 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, and use high-voltage high-c...

Claims

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Application Information

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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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