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Ternary electrolyte containing unsaturated heterocyclic ring and preparation method and application thereof

An unsaturated, electrolyte technology, applied in the battery field, can solve problems such as correlation or deducibility uncertainty, and achieve the effects of improving electrochemical performance, inhibiting decomposition, and increasing discharge specific capacity

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 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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  • Ternary electrolyte containing unsaturated heterocyclic ring and preparation method and application thereof
  • Ternary electrolyte containing unsaturated heterocyclic ring and preparation method and application thereof
  • Ternary electrolyte containing unsaturated heterocyclic ring and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Example 1: Raw materials M1

[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, and the reaction was stirred at room temperature for 8 hours, and the resulting mixed solution 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, wherein Q is OBF 3 Li. The yield was 86%.

Embodiment 2

[0073] Example 2: Raw materials M2

[0074] Preparation method: under argon atmosphere, mix 0.01 mol of raw material and boron trifluoride ether complex (4.26 g, 0.03 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. 18.75ml 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 three times with cyclohexane, filtered and dried to obtain product M2, wherein Q is OBF 3Li. The yield was 88%.

Embodiment 3

[0075] Example 3: Raw materials M3

[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 7 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 87%, NMR as figure 1 shown.

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Abstract

The invention relates to a ternary electrolyte containing an unsaturated heterocyclic ring 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, the boron trifluoride salt 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; the heteroatom is selected from S, N, O, P, Se, Ca, Al, B or Si; m is a metal cation; e4 is a chain without or containing at least one atom; -E2-OBF3M is connected to any one atom in E4 or an unsaturated heterocyclic ring; 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 provided by the invention can be applied as an additive in a battery and can also be applied as a single-ion conductor polymer electrolyte and a polymer skeleton, 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 three-membered electrolyte containing an unsaturated heterocycle 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 batterie...

Claims

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Application Information

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