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Ternary electrolyte containing linked ring salt as well as preparation method and application of ternary electrolyte

A technology of electrolytes and rings, which is applied in the field of ternary electrolytes containing bicyclic salts and its preparation, can solve problems such as correlation or deducibility uncertainty, achieve electrochemical performance improvement, widen the electrochemical window, Effect of improving discharge specific capacity and 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

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Problems solved by technology

This is because this type of structure is special, and the chemical properties such as the electrical properties of the ring itself are also relatively special and self-contained. 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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  • Ternary electrolyte containing linked ring salt as well as preparation method and application of ternary electrolyte
  • Ternary electrolyte containing linked ring salt as well as preparation method and application of ternary electrolyte
  • Ternary electrolyte containing linked ring salt as well as preparation method and application of ternary electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Example 1: Raw materials

[0074] 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. The yield was 85%, NMR as figure 1 shown.

Embodiment 2

[0075] Example 2: Raw materials

[0076] 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. 18.90ml 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, 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

[0077] Example 3: Raw materials

[0078] 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, 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 product M3, wherein Q is OBF 3 Li. Yield 88%, NMR as figure 2 shown.

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Abstract

The present invention relates to a ternary electrolyte containing a linked ring salt and a preparation method and application thereof, the electrolyte comprises a boron trifluoride salt represented by the following general formula I: in the general formula I, R and R1 represent rings, and the rings comprise a single ring and a multi-ring composed of at least two single rings; e8 is none, a chain containing at least one atom or a ring-containing structure; m is a metal cation; e4 is a chain without or containing at least one atom; -E3-OBF3M is connected to any one atom of E4, E8, R or R1; e1, E2 and E3 are independently null, a chain structure containing at least one atom or a structure containing a ring; r'and R1 'are independently substituent groups, three-OBF3M groups exist in the structure of the boron trifluoride salt, and preferably-OBF3M is connected with a carbon atom C. The boron trifluoride salt can be applied 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 battery and an all-solid battery and has a good effect.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a ternary electrolyte containing bicyclic salts 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 matc...

Claims

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Application Information

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IPC IPC(8): C07F5/02H01M10/0525H01M10/0567
CPCC07F5/022H01M10/0525H01M10/0567Y02P70/50
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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