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Flame-retardant additive, preparation method therefor and application of flame-retardant additive

A flame retardant additive and reaction technology, applied in the field of flame retardant additives and their preparation, can solve the problems of high manufacturing and use costs, and achieve the effects of reducing production costs, increasing profit margins, and reducing environmental pollution

Inactive Publication Date: 2019-12-20
恒大新能源科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies of the prior art, the present invention provides a new type of phosphorus-containing flame retardant for the shortcomings of many performances and high manufacturing and use costs of the phosphorus-containing flame retardants in the prior art. The flame retardant is used as a flame retardant additive in the electrolyte of a non-aqueous electrolyte secondary battery, and a preparation method of the above flame retardant is provided at the same time

Method used

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  • Flame-retardant additive, preparation method therefor and application of flame-retardant additive

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preparation example Construction

[0053] Preparation of reaction intermediate B:

[0054] S01: At room temperature, add 310g of ethylene glycol (reactant A) and 350g of anhydrous dichloromethane (non-aqueous solvent) into a three-necked flask with a capacity of 2000mL, cool down to 0°C, and continue stirring for 0.5h until the solution becomes Colorless and transparent, the three-necked bottle is connected to an external gas absorption device.

[0055] In the S01 step, the non-aqueous solvent is added to make the reactants more uniformly dispersed and provide a stable reaction environment. The non-aqueous solvent treatment in this step uses dichloromethane, can also select acetonitrile, tetrahydrofuran, chloroform, ethyl acetate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, n-hexane, cyclohexane, One or more mixtures of organic solvents such as benzene and toluene, which have good dispersibility and have no influence on the reaction process. The added quality of the non-aqueous solvent can ...

Embodiment 1

[0064] Preparation of compound 1 (vinyl phenol phosphate or 2-phenol-2-oxo-1,3,2-dioxaphospholane):

[0065] Add 200g of dichloromethane (solvent, the same effect as the aforementioned non-aqueous solvent, optional use) and 100g of phenol (reactant C) into a 500mL three-necked flask at room temperature, and stir at room temperature for 0.5h to completely dissolve the phenol, and the solution is free. The color is transparent, the three-necked bottle is connected to an external gas absorption device, and then 143g of reaction intermediate B is slowly added to a 500mL three-necked bottle through a dropping funnel, the dropping rate is controlled at 1 drop / second, and the reaction temperature is 0°C. The dropwise addition of body B releases a large amount of heat and a large amount of HCl gas. After all the drops are completed, the solution is colorless and transparent (1.5h after dropping in the reaction intermediate B), and then the temperature is raised to room temperature and ...

Embodiment 2

[0071] Preparation of Compound 2 (4-methylphenol-based vinyl phosphate or 2-(4-methylphenol-based)-2-oxo-1,3,2-dioxaphospholane):

[0072] Add 200g of dichloromethane and 120g of 4-methylphenol (reactant C) into a 500ml three-necked flask at room temperature, stir at room temperature for 0.5h, 4-methylphenol is completely dissolved, and the solution is colorless and transparent, and the three-necked flask is connected to an external gas absorption device, then slowly add 143g of reaction intermediate B into a 500ml three-necked flask via a dropping funnel, control the dropping rate to 1 drop / second, and the reaction temperature is 0°C. With the dropwise addition of reaction intermediate B, a large amount of Heat and a large amount of HCl gas is released, and the solution is colorless and transparent after dripping. Continue to stir at room temperature for 12 hours, then remove dichloromethane to obtain a light yellow solid, which is crystallized by n-hexane and dried in vacuo f...

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Abstract

The invention discloses a flame-retardant additive, a preparation method therefor and an application of the flame-retardant additive. In view of that phosphorus-containing flame retardants in the prior art have many performance disadvantages and the problem of high manufacturing and service costs, the invention provides a novel phosphorus-containing flame retardant. The flame retardant is used asa flame-retardant additive in an electrolyte of a non-aqueous electrolytte secondary battery. The invention simultaneously provides the preparation method for the flame retardant. The phosphorus-containing flame retardant prepared by the method not only can effectively improve safety of batteries, but also has a specific positive-negative pole membrane forming function, and thus, comprehensive properties such as high- / low-temperature, cycling and storage properties of the secondary battery can be remarkably improved. The preparation method for the flame retardant, provided by the invention, has the advantages that the raw material cost is low, the preparation process is simple in step, the operation is safe, the product purity is high, and the environmental pollution is light.

Description

technical field [0001] The invention relates to the field of organic compounds, in particular to a flame retardant additive for secondary batteries and its preparation method and application. Background technique [0002] Secondary batteries are widely used in digital products, medical equipment, new energy vehicles, aerospace and other fields due to their advantages of light weight, high specific energy, high open circuit voltage, long storage life, and low self-discharge rate. Today, as commercialized secondary batteries are becoming more and more mature, the secondary battery industry has developed rapidly, especially in the emerging power market and energy storage fields, which are increasingly showing their unique advantages. Secondary batteries are closely related to people's life and social development, which requires a high degree of safety. However, with the continuous improvement of people's requirements for the energy density of secondary batteries Problems also ...

Claims

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Application Information

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IPC IPC(8): C07F9/6574H01M10/0567
CPCC07F9/65742H01M10/0567Y02E60/10
Inventor 时迎华赵文文张勍韩文玉
Owner 恒大新能源科技集团有限公司
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