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A kind of preparation method of electrolyte additive

A technology of electrolyte additive and reaction solution, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of low yield, high cost, cumbersome preparation process, etc., and achieve high conversion rate, low cost, and price. cheap effect

Active Publication Date: 2018-01-16
ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an additive, its preparation process is relatively cumbersome, requires high cost, and the output rate is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1.3150 g of cesium fluoride and 20 ml of absolute ethanol were stirred at 25° C. for 20 minutes in a 50 ml sealed reaction vessel coated with polytetrafluoroethylene to completely dissolve the cesium fluoride to obtain a cesium fluoride solution. Add 20ml of pyridine into the airtight container containing the cesium fluoride solution, stir at 25°C for 10 minutes to form a homogeneous solution, then pass nitrogen gas (water content <10ppm) for 30 minutes to replace the air in the container. A cooling substance (a mixed solution of ethanol, ethylene glycol and water, the weight ratio of ethanol, ethylene glycol and water is 2:1:2) is passed into the jacket of the airtight container, and the cooling medium is cooled to 0°C with a cooler, And make the cooling medium circulate in the jacket. Pass the mixed gas of phosphorus pentafluoride and nitrogen into the airtight container at a rate of 0.1 g / min for 2 hours (the mass ratio of phosphorus pentafluoride to nitrogen is 1:9)...

Embodiment 2

[0030]Stir 3.5064 g of barium fluoride and 40 ml of anhydrous methanol in a 100 ml sealed reaction vessel coated with polytetrafluoroethylene at 25° C. for 20 minutes to completely dissolve the barium fluoride to obtain a barium fluoride solution. Add 20ml of triethylamine into the airtight container containing the barium fluoride solution, stir at 25°C for 10 minutes to form a homogeneous solution, then pass through argon (water content <10ppm) for 30 minutes to replace the air in the container. A cooling substance (a mixed solution of ethanol, ethylene glycol and water, the weight ratio of ethanol, ethylene glycol and water is 2:1:2) is passed into the jacket of the airtight container, and the cooling medium is cooled to 0°C with a cooler, And make the cooling medium circulate in the jacket. Pass the mixed gas of arsenic pentafluoride and argon into the airtight container at a rate of 0.5 g / min for 1 hour (the mass ratio of arsenic pentafluoride to argon is 1:7), while stirr...

Embodiment 3

[0032] Stir 1.2562 g of strontium fluoride and 60 ml of n-butyl ether in a 100 ml sealed reaction vessel coated with polytetrafluoroethylene at 25° C. for 20 minutes to completely dissolve the strontium fluoride to obtain a strontium fluoride solution. Add 15ml of acetonitrile into a closed container containing strontium fluoride solution, stir at 25°C for 10 minutes to form a homogeneous solution, then pass through helium (water content <10ppm) for 30 minutes to replace the air in the container. A cooling substance (a mixed solution of ethanol, ethylene glycol and water, the weight ratio of ethanol, ethylene glycol and water is 2:1:2) is passed into the jacket of the airtight container, and the cooling medium is cooled to 0°C with a cooler, And make the cooling medium circulate in the jacket. Pass the mixture of boron trifluoride and helium into the airtight container at a rate of 0.1 g / min for 3 hours (the mass ratio of boron trifluoride to helium is 1:16), while stirring co...

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Abstract

The invention provides a safe preparation method for an electrolyte additive with a low cost and a high yield and capable of large-scale preparation. The electrolyte additive is an AaXxBb compound employing fluorinated metal salt, fluorinated gas and nitrogen-containing ligands as raw materials, A is at least any one selected from Cs, Rb, Sr and Ba, X is at least any one selected from C5H5N, (C2H5)3N, CH3CN, (CH2CN)2 and (C2H4CN)2, wherein, a is more than 0 and less than 3, x is more than 0 and less than 3, and a is more than 0 and less than 3. Fluorinated metal salt is dissolved in an alcohol and ether solvent, nitrogen-containing ligands are added at a normal temperature under protection of inert gas, fluorinated gas and nitrogen are mixed and inputted into the container under circulation of a cooling medium, the reaction is carried out for 2-4h, centrifugation and washing are repeated, and the AaXxBb compound is obtained after drying. The provide preparation method can be applied to the compound synthesis field.

Description

technical field [0001] The invention relates to a synthesis and purification method of an organic compound, in particular to an electrolyte additive A a x x B b Compound preparation methods. Background technique [0002] Electrolyte functional additive A a x x B b The compound is a new type of electrolyte additive for lithium-ion batteries, which can significantly improve the working performance of lithium-ion batteries. The additive can form a good protective film on the electrodes of lithium-ion batteries, so it can be widely used in the electrolysis of lithium-ion batteries such as conventional lithium-ion batteries, high-voltage lithium-ion batteries, safe flame-retardant lithium-ion batteries and high-power lithium-ion batteries. liquid additives. As an additive, its preparation process is relatively cumbersome, requires high cost, and the output rate is not high. In order to solve the above problems, a new preparation method needs to be designed. Contents of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 戴晓兵王霹霹
Owner ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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