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Polycyclic ternary electrolyte as well as preparation method and application thereof

A technology of electrolyte and polycyclic boron trifluoride, which is applied in the direction of chemical instruments and methods, circuits, electrical components, etc., can solve problems such as correlation or inferential uncertainty, and achieve improved electrochemical performance and specific discharge capacity , the effect of improving Coulombic efficiency

Inactive Publication Date: 2022-06-03
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 relatively special, so the three -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 ternary electrolyte as well as preparation method and application thereof
  • Polycyclic ternary electrolyte as well as preparation method and application thereof
  • Polycyclic ternary electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Example 1: Raw materials

[0072] Preparation method: under nitrogen atmosphere, mix 0.01 mol of raw material and boron trifluoride tetrahydrofuran complex (4.19 g, 0.03 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 (1.56g, 0.03mol) was dissolved in 10ml of ethanol and slowly added to the intermediate, 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, wherein Q is OBF 3 Li. Yield 84%.

Embodiment 2

[0073] Example 2: Raw materials

[0074] Preparation method: under argon atmosphere, mix 0.01 mol of raw material and boron trifluoride diethyl ether complex (4.26 g, 0.03 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 30° C. and a vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. 18.80ml of butyllithium in hexane solution (c=1.6mol / L) was added to the intermediate, and the reaction was stirred at room temperature for 6 hours. The obtained mixed solution was washed with xylene for 3 times, at 40°C, and the vacuum degree was about -0.1 Drying under reduced pressure under the condition of MPa, the obtained crude product was washed 3 times with cyclohexane, filtered and dried to obtain product M2, wherein Q is OBF 3 Li. The yield was 87%.

Embodiment 3

[0075] Example 3: Raw materials

[0076] Preparation method: under nitrogen atmosphere, take 0.01 mol of raw material and lithium methoxide (1.14 g, 0.03 mol), mix 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 (4.19 g, 0.03 mol) was added to the intermediate, and the reaction was stirred at room temperature for 6 hours. 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 product M3, wherein Q is OBF 3 Li. Yield 86%, NMR as figure 1 shown.

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Abstract

The invention relates to a polycyclic ternary electrolyte and a preparation method and application thereof, the electrolyte comprises boron trifluoride salt represented by the following general formula I: in the general formula I, a polyring is represented, and the polyring is composed of two or more than two single rings; the polyrings comprise a fused ring, a bridge ring and a spiro ring, and simultaneously contain at least two of the three polyrings or simultaneously contain at least one single ring and at least one of the three polyrings; m is a metal cation; e4 is a chain without or containing at least one atom; -E2-OBF3M is connected to E4 or any one atom in a plurality of rings; e1, E2 and E3 are independently null, a chain structure containing at least one atom or a structure containing a ring; r is a substituent. The boron trifluoride salt can be used as an additive in a battery, and the electrolyte can be applied to a liquid battery, a mixed solid-liquid battery, a semi-solid battery, a gel battery, a quasi-solid-state battery and an all-solid-state battery and has a good effect.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a polycyclic ternary electrolyte and a preparation method and application thereof. Background technique [0002] Electrolyte is an important and necessary component of batteries. Batteries have the advantages of high energy density, high voltage, many cycles, and long storage time. Since commercialization, they have been widely used in electric vehicles, energy storage power stations, drones, and portable devices. Regardless of the application direction, it is urgent to improve the energy density and cycle performance of the battery under the premise of ensuring the safety of the battery. [0003] The current development of liquid batteries mainly includes positive electrodes, negative electrodes, electrolytes and separators. To improve the energy density of the batteries is to increase the working voltage and discharge capacity of the batteries, that is, to match the high-volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525C07F5/02
CPCH01M10/0525H01M10/0567C07F5/022Y02P70/50
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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