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Saturated heterochain ternary electrolyte as well as preparation method and application thereof

A technology of electrolytes and heterochains, applied in the field of saturated heterochain ternary electrolytes and their preparation, can solve problems such as correlation or deducibility uncertainty, achieve improved electrochemical performance, widen the electrochemical window, and improve cycle performance effect

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 the electrical and other chemical properties of the heterochains containing heteroatoms are relatively special and self-contained, and the three strongly polar -OBF 3 When M is connected to a saturated heterochain, it will also affect the chemical and physical properties of the entire chain, which are substantially different from carbon chains, unsaturated chains and ring structures, so the correlation between them may be possible. inferential uncertainty

Method used

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  • Saturated heterochain ternary electrolyte as well as preparation method and application thereof
  • Saturated heterochain ternary electrolyte as well as preparation method and application thereof
  • Saturated heterochain ternary electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1: Raw materials

[0058] 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, and dried under reduced pressure at 40°C and vacuum degree of about -0.1MPa to obtain a crude The product was washed three times with cyclohexane, filtered and dried to obtain product M1, wherein Q is OBF 3 Li. The yield was 87%, NMR as figure 1 shown.

Embodiment 2

[0059] Example 2: Raw materials

[0060] 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 M2, wherein Q is OBF 3 Li. Yield 78%, NMR as figure 2 shown.

Embodiment 3

[0061] Example 3: Raw materials

[0062] Preparation method: 0.01 mol of raw material and boron trifluoride ether complex (4.26 g, 0.03 mol) were mixed uniformly in 15 ml of THF in a glove box, and the reaction was carried out at room temperature for 12 hours. The obtained mixed solution is dried under reduced pressure under the conditions of room temperature and vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. Lithium ethoxide (1.56 g, 0.03 mol) was dissolved in 10 ml of ethanol and added to the intermediate, and 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 -0.1 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. The yield was 85%, NMR as image 3 shown.

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Abstract

The invention relates to a saturated heterochain ternary electrolyte as well as a preparation method and application thereof. The electrolyte comprises a saturated heterochain boron trifluoride salt represented by the following general formula I, wherein R, R1 or R4 are independently a first chain without or containing at least one atom; r, R1 and R4 are not none at the same time; any one atom of R, R1, R2, R3 or R4 is connected with-R5-OBF3M, and-R5-OBF3M is connected to any one atom of R, R1, R2, R3 or R4; r2, R3 or R5 are independently a second chain free of or containing at least one atom; m is a metal cation; the first chain and the second chain are both saturated chains; h on any C in the first chain and the second chain can be independently substituted by a substituent, and the first chain, the second chain and the chain substituent contain at least one non-carbon heteroatom. The boron trifluoride salt can be used as an additive in a battery, 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 saturated heterochain 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C07F7/08C07F9/50H01M10/0525H01M10/0567
CPCC07F5/022C07F7/083C07F9/5009H01M10/0525H01M10/0567Y02P70/50
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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