Polycyclic electrolyte and preparation and application thereof

An electrolyte and ring technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as uncertainty in correlation or inference, and achieve inhibition of electrolyte decomposition, high ionic conductivity, and electrochemical performance improvement. Effect

Inactive Publication Date: 2022-03-25
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 special polycyclic rings such as parallel rings, spiro rings, and bridged rings are also special, so the two -OBF 3 When M is connected to the ring, it will affect the chemical and physical properties of the entire ring, which is substantially different from the single ring, chain structure, etc., so the correlation or inference between them is uncertain

Method used

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  • Polycyclic electrolyte and preparation and application thereof
  • Polycyclic electrolyte and preparation and application thereof
  • Polycyclic electrolyte and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1: raw material M1

[0075] Preparation method: under a nitrogen atmosphere, mix 0.01 mol of raw materials 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 40° C. and a vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. Dissolve lithium ethoxide (1.04g, 0.02mol) 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 M1. Yield was 74%, NMR as figure 1 shown.

Embodiment 2

[0076] Embodiment 2: raw material M2

[0077] Preparation method: Under argon atmosphere, the raw material 4-hydroxy-3-nitro-5,6,7,8-tetrahydro-1H-quinoline-2-hydroxyl (2.10g, 0.01mol) and boron trifluoride Diethyl ether complex (2.98g, 0.021mol) was mixed uniformly in 15ml of ethylene glycol dimethyl ether, and reacted 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 14ml of butyllithium hexane solution (c=1.6mol / L) to the intermediate, stir and react at room temperature for 6 hours, wash the resulting mixed solution with xylene for 3 times, and store at 40°C under a vacuum of about -0.1MPa Drying under reduced pressure under the conditions above, the obtained crude product was washed 3 times with cyclohexane, filtered and dried to obtain the product M2. The yield was 83%, NMR such as figure 2 shown.

Embodiment 3

[0078] Embodiment 3: raw material M3

[0079] Preparation method: Under a nitrogen atmosphere, take 0.01mol of the raw material and lithium methoxide (0.76g, 0.02mol), mix well 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 (3.07g, 0.022mol) was added to the intermediate, stirred at room temperature for 6 hours, and the resulting mixture was dried under reduced pressure at 40°C and a vacuum of about -0.1MPa to obtain The solid was washed three times with isopropyl ether, filtered and dried to give the product M3. Yield 76%, NMR as image 3 shown.

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Abstract

The invention relates to a polycyclic electrolyte and preparation and application thereof, the electrolyte comprises boron trifluoride salt represented by the following general formula I: wherein R represents a polyring, and the polyring is composed of two or more than two monorings; the multi-rings comprise a fused ring, a bridge ring and a spiro ring, and simultaneously contain at least two of the three multi-rings or simultaneously contain at least one single ring and at least one of the three multi-rings; m is a metal cation; e1 and E2 are independently null, a group, a chain structure or a ring-containing structure; according to the electrolyte disclosed by the invention, two-OBF3M are creatively compounded in a polycyclic compound, so that the polycyclic compound can be used as an electrolyte salt and an additive, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a polycyclic electrolyte and its preparation and application. Background technique [0002] Electrolyte is an important and necessary component of secondary batteries. Lithium / sodium batteries have the advantages of high energy density, high voltage, many cycles, and long storage time. Since their commercialization, they have been widely used in electric vehicles, energy storage power stations, wireless Human-machine, portable equipment and other aspects, regardless of the application direction, there is an urgent need to improve the energy density and cycle performance of batteries on the premise of ensuring battery safety. [0003] Lithium / sodium batteries mainly include positive electrodes, negative electrodes, electrolytes, and separators. To increase the energy density of batteries is to increase the working voltage and discharge capacity of batteries, that is, to use high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02H01M10/0565H01M10/0567H01M10/0568
CPCC07F5/022H01M10/0567H01M10/0568H01M10/0565
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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