Binary electrolyte and preparation and application thereof

An electrolyte and a common technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve problems such as not much achievement, no reference source, increased resistance, etc., to achieve inhibition of electrolyte decomposition, improvement of electrochemical performance, discharge ratio The effect of capacity increase

Pending 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

In the prior art, there are only very few researchers who are concerned about the 3 sporadic studies on compounds with a BF 3 Group research, at present, there is not much achievement, let alone the achievement of industrial application; there is little in the prior art for -O-BF 3 The M group was studied, not to mention the two -OBF 3 M group research published
This is also because of -OBF 3 The presence of M is strong, if -OBF is added to the molecule 3 The number of M may have unpredictable changes to the overall properties of the entire molecular structure. Therefore, if the research team contains two or more -OBF 3 In the research of M, the resistance will be greatly increased, the time cost and economic cost may be extremely high, and the results are not easy to predict. Therefore, the research team has only studied the 3 M conduct research
Even for pairs containing an -OBF 3 M conducts research, because there are very few existing technologies, and the reference value is also very small, and there is no source of reference for the research of the two groups.

Method used

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  • Binary electrolyte and preparation and application thereof
  • Binary electrolyte and preparation and application thereof
  • Binary electrolyte and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Embodiment 1: raw material M1

[0094] Preparation method: under an argon atmosphere, metal lithium flakes (0.7g, 0.1mol) were slowly added to the raw material 1,3-cyclopentanediol (6.12g, 0.06mol), reacted at room temperature for 1 hour, and then heated to 50°C until the lithium flakes react completely. The resulting mixture was dried under reduced pressure at 50° C. and a vacuum degree of about -0.1 MPa to remove unreacted 1,3-cyclopentanediol to obtain an intermediate. Add boron trifluoride butyl ether complex (21.78g, 0.11mol) to the intermediate, stir and react at 50°C for 6 hours, and dry the resulting mixture under reduced pressure at 50°C and vacuum degree of about -0.1MPa , The obtained solid was washed three times with isopropyl ether, filtered and dried to obtain the product M1. The yield was 80%, NMR such as figure 1 shown.

Embodiment 2

[0095] Embodiment 2: raw material M2

[0096] Preparation method: Under a nitrogen atmosphere, mix the raw materials 2-carboxy-1-cyclopentene-1-acetic acid (1.7g, 0.01mol) and boron trifluoride tetrahydrofuran complex (2.8g, 0.02mol), and react at room temperature 12 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. Dissolve lithium ethoxide (1.04g, 0.02mol) in 10ml of ethanol and slowly add it to the intermediate, stir and react at 45°C for 8 hours, and dry the resulting mixture under reduced pressure at 45°C and vacuum degree of about -0.1MPa , The obtained solid was washed three times with n-butyl ether, filtered and dried to obtain the product M2. The yield was 78%.

Embodiment 3

[0097] Embodiment 3: raw material M3, M + for Li +

[0098] Preparation method: Under argon atmosphere, the raw materials 3,4-bis(hydroxymethyl)-2,5-furandione (1.58g, 0.01mol) and boron trifluoride diethyl ether complex (2.98g, 0.021mol ) were mixed evenly, and reacted 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, wash the resulting mixed solution with xylene for 3 times, and store at 40°C under a vacuum of about -0.1MPa Drying under reduced pressure under the above conditions, the obtained crude product was washed 3 times with cyclohexane, filtered and dried to obtain the product M3. The yield was 85%, NMR such as figure 2 shown.

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Abstract

The invention relates to a binary electrolyte and preparation and application thereof, the binary electrolyte comprises boron trifluoride salt represented by the following general formula I: in the general formula I, R1, R2 and R3 can be independently null, chain or ring; r1, R2 and R3 are not null at the same time; r1, R2 or R3 contains one of-OBF3M; when R1, R2 or R3 contains a ring, the ring is a ring formed by C atoms or a ring containing at least one heteroatom; when R1, R2 or R3 are chains, R1, R2 or R3 are chains only composed of C atoms or chains containing non-carbon atoms, the chains are saturated chains or chains containing unsaturated bonds, and the unsaturated bonds comprise double bonds and / or triple bonds; r1, R2 or R3 is connected with a first substituent group. According to the electrolyte disclosed by the invention, two-OBF3M are creatively compounded in one compound, and the compound can be used as an electrolyte salt and can also be used as an additive, so that the effect is good.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a binary 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, to use high-vol...

Claims

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Application Information

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IPC IPC(8): C07F5/02H01M10/0567H01M10/0568H01M10/0565
CPCC07F5/022H01M10/0567H01M10/0568H01M10/0565
Inventor 俞会根杨萌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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