Electrolyte containing unsaturated heterochain structure and preparation method and application thereof

An electrolyte, unsaturated technology, applied in organic electrolytes, non-aqueous electrolytes, chemical instruments and methods, etc., to achieve high ionic conductivity, improved electrochemical performance, and excellent 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

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 unsaturated heterochain structure and preparation method and application thereof
  • Electrolyte containing unsaturated heterochain structure and preparation method and application thereof
  • Electrolyte containing unsaturated heterochain structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] raw material

[0064] Preparation method: Under nitrogen atmosphere, mix the raw material (0.01mol) and boron trifluoride tetrahydrofuran complex (1.4g, 0.01mol) 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 (0.52g, 0.01mol) 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 P1. The yield of product P1 was 85%.

Embodiment 2

[0066] raw material

[0067] Preparation method: Under argon atmosphere, mix the raw material (0.01mol) and boron trifluoride etherate complex (1.42g, 0.01mol) in 15ml 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 6.30ml of butyllithium hexane solution (c=1.6mol / L) to the intermediate, stir and react at room temperature for 10 hours, and dry the resulting mixture under reduced pressure at 40°C and vacuum degree of about -0.1MPa , the obtained crude product was washed 3 times with cyclohexane, filtered and dried to obtain the product P2. The yield of product P2 was 87%.

Embodiment 3

[0069] raw material

[0070] Preparation method: under a nitrogen atmosphere, take a certain amount of raw materials (0.01mol) and lithium methoxide (0.38g, 0.01mol), mix them 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 (1.47g, 0.0105mol) and 15ml THF (tetrahydrofuran) were added to the intermediate, and the reaction was stirred at room temperature for 18 hours. Drying under reduced pressure, the obtained solid was washed three times with isopropyl ether, filtered and dried to obtain the product P3. The yield of product P3 was 85%.

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Abstract

The invention provides an electrolyte containing an unsaturated heterochain structure as well as a preparation method and application of the electrolyte. Wherein the electrolyte comprises a boron trifluoride salt, and the structure of the boron trifluoride salt is as shown in a general formula I. When the boron trifluoride salt provided by the invention is used as an additive of an electrolyte, a stable passivation layer is formed on the surface of an electrode, so that the first effect and cycle performance of a battery can be remarkably improved; when being used as a salt in an electrolyte, the salt has relatively good ion transmission property and stable electrochemical performance; the monomer with polymerizable groups can also be used as a single ion conductor and a polymer skeleton after in-situ / ex-situ polymerization, and the effect is good. 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. The general formula I of the MF3BS-R1-R is shown in the specification.

Description

technical field [0001] The present application relates to the field of battery technology, in particular to an electrolyte containing an unsaturated heterochain structure and its preparation method and application. Background technique [0002] Secondary batteries have the characteristics of high energy density, low self-discharge, no memory effect, and high power. In emerging fields such as electric aircraft, electric ships, and robots, the requirements for battery capacity and energy density in application fields are further enlarged, and the requirements for battery materials are also continuously increasing. [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 negative electrode materials, such as high-voltage lithium cobalt oxide (LCO), high-nickel ternary (NCM811, NCM622 , NCM532 and NCA), lithium nickel m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02H01M10/0525H01M10/0567
CPCC07F5/022H01M10/0525H01M10/0567H01M2300/0025
Inventor 俞会根杨萌程勇斌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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