Saturated heterochain electrolyte and preparation and application thereof

A technology of electrolytes and heterochains, applied in the field of saturated heterochain electrolytes, can solve problems such as correlation or deducibility uncertainty, and achieve the effects of inhibiting electrolyte decomposition, improving electrochemical performance, and high ionic conductivity

Inactive Publication Date: 2022-03-25
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 the saturated heterochain itself are relatively special and self-contained, and the two 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 rings and other types of chain structures, so the correlation or deducibility between each other uncertain

Method used

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  • Saturated heterochain electrolyte and preparation and application thereof
  • Saturated heterochain electrolyte and preparation and application thereof
  • Saturated heterochain electrolyte and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1: raw material

[0061] Preparation method: under argon atmosphere, the raw material (methylaminodiyl) bis(ethoxymethanol) (1.79g, 0.01mol) and boron trifluoride etherate complex (2.98g, 0.021mol) were dissolved in 15ml of ethyl ether Mix evenly in glycol dimethyl ether, and react at room temperature for 12 hours. The resulting mixed solution was dried under reduced pressure at 30° C. and a vacuum of about −0.1 MPa to remove the solvent to obtain an intermediate. Add 14ml of butyllithium hexane solution (c=1.6mol / L) to the intermediate, stir and react at room temperature for 6 hours, and dry under reduced pressure at 40°C and vacuum degree of about -0.1MPa to obtain the crude product Washed 3 times with cyclohexane, filtered and dried to obtain the product M1. The yield was 85%, NMR as figure 1 shown.

Embodiment 2

[0062] Embodiment 2: raw material

[0063] Preparation method: Under a nitrogen atmosphere, take 0.012mol of the raw material and lithium methoxide (0.76g, 0.02mol), mix well with 20ml of methanol, and react at room temperature for 8 hours. The obtained mixed solution was dried under reduced pressure at 40° C. and a vacuum degree of about -0.1 MPa to remove the solvent to obtain an intermediate. Boron trifluoride tetrahydrofuran complex (3.07g, 0.022mol) was added to the intermediate, stirred at room temperature for 6 hours, and the resulting mixture was dried under reduced pressure at 40°C and a vacuum of about -0.1MPa to obtain The solid was washed three times with isopropyl ether, filtered and dried to give the product M2. Yield 77%, NMR as figure 2 shown.

Embodiment 3

[0064] Embodiment 3: raw material

[0065] Preparation method: mix the raw materials bis(hydroxymethyl)peroxide (0.94g, 0.01mol) and boron trifluoride etherate complex (2.98g, 0.021mol) in 15mlTHF in a glove box, and react at room temperature for 12 hours . The resulting mixed solution was dried under reduced pressure at room temperature and a vacuum of about -0.1 MPa to remove the solvent to obtain an intermediate. Lithium ethoxide (1.04g, 0.02mol) was dissolved in 10ml of ethanol and added to the intermediate, stirred at room temperature for 6 hours, and the resulting mixture was dried under reduced pressure at 40°C and a vacuum of about -0.1MPa to obtain The solid was washed three times with isopropyl ether, filtered and dried to give the product M3. The yield was 85%, NMR such as image 3 shown.

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Abstract

The invention relates to a saturated heterochain electrolyte and preparation and application thereof, the electrolyte comprises boron trifluoride salt represented by the following general formula I: in the general formula I, R or R1 is independently a first chain without or containing at least one atom; r and R1 are not none at the same time; r2 and R3 are second chains which do not contain or contain 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 substituent groups, and the substituent groups comprise H, a chained substituent group containing at least one atom and a cyclic substituent group; the first chain, the second chain and the chain substituent contain at least one heteroatom. According to the electrolyte disclosed by the invention, two-OBF3M are creatively compounded in one compound, so that the electrolyte can be used as an electrolyte salt and an additive, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a saturated heterochain electrolyte and its preparation and application. Background technique [0002] Electrolyte is an important and necessary component of secondary batteries. Lithium / sodium batteries have the advantages of high energy density, high voltage, many cycles, and long storage time. Since their commercialization, they have been widely used in electric vehicles, energy storage power stations, wireless Human-machine, portable equipment and other aspects, regardless of the application direction, there is an urgent need to improve the energy density and cycle performance of batteries on the premise of ensuring battery safety. [0003] Lithium / sodium batteries mainly include positive electrodes, negative electrodes, electrolytes, and separators. To increase the energy density of batteries is to increase the working voltage and discharge capacity of batteries, that is, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0568H01M10/0565C07F5/02
CPCH01M10/0567H01M10/0568H01M10/0565C07F5/022Y02E60/10
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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