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Ternary unsaturated heterochain electrolyte and preparation and application thereof

An electrolyte and unsaturated technology, which is applied in the field of ternary unsaturated heterochain electrolytes, can solve problems such as correlation or deducibility uncertainty, achieve electrochemical performance improvement, 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 chemical properties such as unsaturated bonds and the electrical properties of the heteroatoms themselves are relatively special and self-contained, and the three strongly polar -OBF 3 When M is connected to an unsaturated heterochain, it will also affect the chemical and physical properties of the entire chain, which are substantially different from saturated chains, carbon chains and ring structures, etc., so the correlation between them may be possible. inferential uncertainty

Method used

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  • Ternary unsaturated heterochain electrolyte and preparation and application thereof
  • Ternary unsaturated heterochain electrolyte and preparation and application thereof
  • Ternary unsaturated heterochain electrolyte and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0076] Example 1: Raw materials

[0077] 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 45°C for 8 hours, and the resulting mixture 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 83%, NMR as figure 1 shown.

Embodiment 2

[0078] Example 2: Raw materials

[0079] Preparation method: under argon atmosphere, metal lithium sheet (0.21 g, 0.03 mol) was slowly added to 0.01 mol of raw material, reacted at room temperature for 3 hours, and then heated to 50° C. until the lithium sheet reacted completely to obtain an intermediate. Boron trifluoride butyl ether complex (5.94g, 0.03mol) and 10ml THF were added to the intermediate, and the reaction was stirred at room temperature for 10 hours. Drying under reduced pressure, the obtained solid was washed three times with isopropyl ether, filtered and dried to obtain product M2, wherein Q is OBF 3 Li. The yield was 87%, NMR as figure 2 shown.

Embodiment 3

[0080] Example 3: Raw materials

[0081] 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. 18.80ml 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, and the resulting mixed solution was dried under reduced pressure at 30°C and a vacuum degree of about -0.1MPa. , the obtained crude product was washed 3 times with cyclohexane, filtered and dried to obtain product M3, wherein Q is OBF 3 Li. The yield was 80%, NMR as image 3 shown.

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Abstract

The invention relates to a ternary unsaturated heterochain electrolyte and preparation and application thereof, the electrolyte comprises the following general formula I: in the general formula I, 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; h on any C in the first chain and the second chain can be independently substituted by substituent groups, and the substituent groups comprise H, a chain substituent group and a cyclic substituent group; the first chain, the second chain and the chain substituent contain at least one non-carbon heteroatom and at least one unsaturated bond. The boron trifluoride salt provided by the invention can be used as an additive in a battery, and can be used as a single ion conductor and a polymer framework after being polymerized for a polymerizable monomer. 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 unsaturated heterochain electrolyte and its preparation and application. 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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IPC IPC(8): C07F5/02C07F7/08C07F9/09H01M10/0525H01M10/0567
CPCC07F5/022C07F9/091C07F7/081C07F7/083H01M10/0525H01M10/0567Y02P70/50
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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