Saturated carbocyclic electrolyte and preparation and application thereof

An electrolyte and carbon ring technology, which is applied in circuits, electrical components, secondary batteries, etc., can solve problems such as not much achievement, strong sense of existence, and low reference value, so as to improve electrochemical performance and inhibit electrolyte decomposition , the effect of excellent electrochemical performance

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

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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  • Saturated carbocyclic electrolyte and preparation and application thereof
  • Saturated carbocyclic electrolyte and preparation and application thereof
  • Saturated carbocyclic electrolyte and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1: Raw materials

[0066] Preparation method: Under nitrogen atmosphere, the raw materials (1R,2R)-1,2-cyclooctanediol (1.44g, 0.01mol) and boron trifluoride tetrahydrofuran complex (2.8g, 0.02mol) were mixed in 15ml ethyl acetate Glycol dimethyl ether was mixed uniformly, and the reaction was carried out 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 (1.04g, 0.02mol) was dissolved in 10ml of ethanol and slowly added to the intermediate, the reaction was stirred at 45°C for 8 hours, and the resulting mixture was dried under reduced pressure at 45°C and a vacuum of about -0.1MPa. , the obtained solid was washed three times with n-butyl ether, filtered and dried to obtain the product M1. The yield was 77%, NMR as figure 1 shown.

Embodiment 2

[0067] Example 2: Raw materials

[0068]Preparation method: under argon atmosphere, the raw material cycloheptane-1,4-diol (1.30g, 0.01mol) and boron trifluoride ether complex (2.98g, 0.021mol) were mixed uniformly, and reacted at room temperature for 12 hours , to obtain an intermediate. 14ml 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. The yield was 88%, NMR as figure 2 shown.

Embodiment 3

[0069] Example 3: Raw materials

[0070] Preparation method: under nitrogen atmosphere, take a certain amount of raw material cis-1,5-cyclooctanediol (1.44g, 0.01mol) and lithium methoxide (0.76g, 0.02mol), mix with 20ml 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 (3.07g, 0.022mol) and 15ml THF (tetrahydrofuran) were added to the intermediate, and the reaction was stirred at room temperature for 6 hours. Drying under reduced pressure, the obtained solid was washed three times with isopropyl ether, filtered and dried to obtain product M3. Yield 76%, NMR as image 3 shown.

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Abstract

The invention relates to a saturated carbocyclic electrolyte and preparation 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 a saturated ring, and atoms forming the saturated ring are carbon; m is a metal cation; e1 and E2 are independently null, a group, a chain structure or a ring-containing structure; r is a substituent group and represents that any H on a ring can be substituted by the substituent group, the substituent group can replace one H or two or more H, and if two or more H are substituted, the substituent groups can be the same or different. According to the electrolyte disclosed by the invention, two-OBF3M are creatively compounded in a saturated ring structure, 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 carbocyclic electrolyte and its preparation and application. Background technique [0002] Electrolyte is an important and necessary component of secondary batteries. Li / Na 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 In all aspects such as man-machine and portable devices, no matter which 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 electrode, negative electrode, electrolyte and separator. To improve the energy density of the battery is to improve the working voltage and discharge capacity of the battery, that is, to use high-voltage high-capacity p...

Claims

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Application Information

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