Sulfur-based boron trifluoride salt electrolyte containing unsaturated heterocyclic ring as well as preparation method and application of sulfur-based boron trifluoride salt electrolyte

A boron trifluoride and unsaturated technology, which is applied in the field of sulfur-based boron trifluoride salt electrolytes and its preparation, can solve problems such as correlation or deducibility uncertainty, achieve electrochemical performance improvement, and broaden the electrochemical performance. Effect of chemical window, high ionic conductivity

Pending 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 the electrical and other chemical properties of heteroatoms and unsaturated bonds are relatively special. When they exist on the ring, they will affect the chemical and physical properties of the entire ring. etc. are substantially different, so the relevance or inference between each other is uncertain

Method used

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  • Sulfur-based boron trifluoride salt electrolyte containing unsaturated heterocyclic ring as well as preparation method and application of sulfur-based boron trifluoride salt electrolyte
  • Sulfur-based boron trifluoride salt electrolyte containing unsaturated heterocyclic ring as well as preparation method and application of sulfur-based boron trifluoride salt electrolyte
  • Sulfur-based boron trifluoride salt electrolyte containing unsaturated heterocyclic ring as well as preparation method and application of sulfur-based boron trifluoride salt electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1: Raw materials

[0078] 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 room temperature 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 77%, NMR as figure 1 shown.

Embodiment 2

[0079] Example 2: Raw materials

[0080] 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, 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, and Q was -S-BF 3 Li. The yield was 85%, NMR as figure 2 shown.

Embodiment 3

[0081] Example 3: Raw materials

[0082] 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 18 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 (3.07 g, 0.022 mol) was added to the intermediate, and the reaction was stirred at room temperature for 12 hours, and the obtained mixed solution was dried under reduced pressure at 40 ° C and a vacuum degree of about -0.1 MPa to obtain The solid was washed three times with isopropyl ether, filtered and dried to obtain the product M3, and Q was -S-BF 3 Li. Yield 84%, NMR as image 3 shown.

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Abstract

The invention relates to a sulfenyl boron trifluoride salt electrolyte containing an unsaturated heterocyclic ring and a preparation method and application thereof, the electrolyte comprises a boron trifluoride salt represented by the following general formula I: R'represents the unsaturated heterocyclic ring, and the unsaturated heterocyclic ring at least contains one heteroatom and at least contains one unsaturated bond at the same time; 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. The boron trifluoride salt provided by the invention can be used as an additive and a salt in the 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 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 invention relates to the technical field of batteries, in particular to a sulfur-based boron trifluoride salt electrolyte containing an unsaturated heterocycle, 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/42H01M10/0566H01M10/0567H01M10/0568
CPCH01M10/0565H01M10/4235H01M10/0566H01M10/0567H01M10/0568H01M2300/0025H01M2300/0085H01M10/42
Inventor 俞会根杨萌程勇斌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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