Unsaturated carbon chain sulfur-based electrolyte as well as preparation method and application thereof

An electrolyte and unsaturated technology, applied in organic electrolytes, non-aqueous electrolytes, circuits, etc., can solve problems such as correlation or deducibility uncertainty, and achieve improved electrochemical performance, widened electrochemical window, and high ionic conductivity rate effect

Inactive Publication Date: 2022-06-21
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 unsaturated carbon chain contains unsaturated bonds, and its electrical properties and other chemical properties are relatively special, while the two strongly polar -SBF 3 When M is attached to an unsaturated carbon chain, it will also affect the chemical and physical properties of the entire chain, which are substantially different from rings and heterochains, etc., so the correlation or inference between them is uncertain

Method used

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  • Unsaturated carbon chain sulfur-based electrolyte as well as preparation method and application thereof
  • Unsaturated carbon chain sulfur-based electrolyte as well as preparation method and application thereof
  • Unsaturated carbon chain sulfur-based electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: Raw materials

[0057] Preparation method: under nitrogen atmosphere, mix 0.01 mol of raw material and boron trifluoride tetrahydrofuran complex (2.8 g, 0.02 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 at 45° C. and the vacuum degree was 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 30°C for 15 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 product M1, and Q was -S-BF 3 Li. The yield was 83%, NMR as figure 1 shown.

Embodiment 2

[0058] Example 2: Raw materials

[0059] Preparation method: under argon atmosphere, metal lithium sheet (0.14 g, 0.02 mol) was slowly added to 0.01 mol of raw material, reacted at room temperature for 4 hours, and then heated to 50° C. until the lithium sheet reacted completely to obtain an intermediate. Boron trifluoride butyl ether complex (3.96g, 0.02mol) and 15ml THF were added to the intermediate, and the reaction was stirred at 30°C for 18 hours. The resulting mixed solution was heated at 40°C and the vacuum degree was about -0.1MPa. Drying under reduced pressure, the obtained solid was washed three times with isopropyl ether, filtered and dried to obtain product M2, Q is -S-BF 3 Li. The yield was 79%, NMR as figure 2 shown.

Embodiment 3

[0060] Example 3: Raw materials

[0061] Preparation method: under argon atmosphere, mix 0.01 mol of raw material and boron trifluoride ether complex (2.98 g, 0.021 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. 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 3 times with cyclohexane, filtered and dried to obtain the product M3, and Q was -S-BF 3 Li. The yield was 83%, NMR as image 3 shown.

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Abstract

The invention relates to an unsaturated carbon chain sulfur-based electrolyte and a preparation method and application thereof, the electrolyte comprises the following general formula I: in the general formula I, R or R1 is independently null or a first chain; r2 and R3 are independently null or a second chain; m is a metal cation; the first chain and the second chain are carbon chains; substituent groups can be connected to the first chain and the second chain; the first chain, the second chain and the chain substituent at least contain one unsaturated bond. The boron trifluoride salt can be used as an additive and a salt in an electrolyte, and can be used as a single-ion conductor polymer electrolyte and a high-molecular skeleton after being polymerized for a polymerizable monomer. The boron trifluoride salt provided by the invention 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 is beneficial to improving the energy density and the cycle stability of the battery and prolonging the service life of the battery. The raw materials are low in price, the synthesis process is simple, and good economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an unsaturated carbon chain sulfur-based electrolyte and a preparation method and application thereof. Background technique [0002] Secondary batteries have received extensive attention over the past few decades due to the widespread application of portable electronic devices and the growing popularity of electric vehicles. Secondary batteries with high energy density occupy a large market in mobile phones, portable electronic products and electric vehicles. However, the demand for large-scale energy storage in the future will further increase the capacity and energy density of batteries, and the requirements for battery materials also keep improving. [0003] Taking lithium batteries as an example, in order to improve the energy density of the battery, it is necessary to improve the working voltage and discharge capacity of the battery, and use high-voltage high-capacity cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/42H01M10/0567H01M10/0568H01M10/0569
CPCH01M10/0565H01M10/4235H01M10/0567H01M10/0568H01M10/0569H01M2300/0025
Inventor 俞会根杨萌程勇斌
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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