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Preparation method and preparation device of additive for electrolyte of lithium battery

A technology for electrolyte additives and preparation devices, applied in secondary batteries, organic electrolytes, non-aqueous electrolytes, etc., can solve the problems of harsh production conditions, high production difficulty, carcinogenicity, etc., achieve easy separation, reduce production difficulty, and produce The effect of process safety

Inactive Publication Date: 2019-01-18
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strong volatile solvents are used in the existing vinylene carbonate synthesis process, which has a strong carcinogenic effect, and the production conditions are harsh and difficult to produce

Method used

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  • Preparation method and preparation device of additive for electrolyte of lithium battery
  • Preparation method and preparation device of additive for electrolyte of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] See figure 1 , Is a method for preparing a lithium battery electrolyte additive provided by an embodiment of the present invention, wherein the method for preparing a lithium battery electrolyte additive includes the following steps:

[0028] Melt the ethylene carbonate and put it into a four-necked flask, install a reflux condenser and a thermometer, in a water bath at the first preset temperature, pass in chlorine gas, and add dimethyl azodiisobutyrate to reach the primary reaction solution;

[0029] Neutralize the primary reaction liquid to neutrality with sodium bicarbonate, separate the liquid, remove the lower organic phase, and distill to obtain the intermediate compound;

[0030] Add dimethyl carbonate and triethylamine into a four-necked flask, install a reflux condenser and a thermometer, add 2,3,4-tri-tert-butylphenol in a water bath under the second preset temperature condition, and remove the intermediate The compound was dropped into a four-necked flask, reacted ...

Embodiment 2

[0032] The second embodiment is a method for preparing a lithium battery electrolyte additive provided in a preferred embodiment of the present invention. The method for preparing a lithium battery electrolyte additive includes the following steps:

[0033] Melt the ethylene carbonate and put it into a four-necked flask, install a reflux condenser and a thermometer, in a water bath at a temperature of 80℃-90℃, pass chlorine gas, add dimethyl azobisisobutyrate, to reach the primary reaction solution ;

[0034] Neutralize the primary reaction liquid to neutrality with sodium bicarbonate, separate the liquid, remove the lower organic phase, and distill to obtain the intermediate compound;

[0035] Add dimethyl carbonate and triethylamine into a four-necked flask, install a reflux condenser and a thermometer, add 2,3,4-tri-tert-butylphenol in a water bath under the second preset temperature condition, and remove the intermediate The compound was dropped into a four-necked flask, reacted...

Embodiment 3

[0037] The third embodiment is a method for preparing a lithium battery electrolyte additive provided by a preferred embodiment of the present invention. The ethylene carbonate is melted and then added to a four-necked flask, equipped with a reflux condenser and a thermometer, and under the first preset temperature condition In the water bath, pass chlorine gas, and add dimethyl azobisisobutyrate to reach the primary reaction liquid;

[0038] Neutralize the primary reaction liquid to neutrality with sodium bicarbonate, separate the liquid, remove the lower organic phase, and distill to obtain the intermediate compound;

[0039] Add dimethyl carbonate and triethylamine into a four-necked flask, install a reflux condenser and a thermometer, add 2,3,4-tri-tert-butylphenol in a water bath under the second preset temperature condition, and remove the intermediate The compound was dropped into a four-necked flask, reacted for 4-5h, cooled and filtered, collected the filtrate, a rotary ev...

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Abstract

The embodiment of the invention discloses a preparation method and a preparation device of an additive for an electrolyte of a lithium battery. The preparation method comprises the following steps ofmelting ethylene carbonate, adding into a four-port flask, loading a reflux condensing pipe and a thermometer, and treating in a water bath under the first preset temperature condition; leading chloride gas, and adding dimethyl azodiisobutyrate, so as to obtain a primary reaction liquid; neutralizing the primary reaction liquid to the neutral property by sodium bicarbonate, separating liquid, selecting an organic phase of the lower layer, and distilling to obtain an intermediate compound; adding dimethyl carbonate and triethylamine into the four-port flask, loading the reflux condensing pipe and the thermometer, treating in a water bath under the second preset temperature condition, adding 2,3,4-tritert-butyl phenol, dripping the intermediate compound into the four-port flask, reacting for4 to 5h, cooling, sucking and filtering, collecting filtrate, removing the dimethyl carbonate and triethylamine in the filtrate by a rotary evaporator, and rectifying, so as to obtain vinylene carbonate. The preparation method and the preparation device of the additive for the electrolyte of the lithium battery have the advantages that the production process is safer, and the difficulty in production is decreased.

Description

Technical field [0001] The invention relates to the technical field of lithium battery electrolyte, in particular to a preparation method and detection device of a lithium battery electrolyte additive. Background technique [0002] Lithium-ion battery electrolyte is one of the four key materials (positive electrode, negative electrode, separator, electrolyte) of lithium-ion battery, which is very important to the battery's operating temperature range, cycle efficiency, specific capacity, safety performance and production cost. It is responsible for the transfer of charge between the positive and negative electrodes in the battery, and is known as the blood of a lithium-ion battery. The electrolyte of lithium ion battery is divided into three types: liquid, solid and lava electrolyte. Liquid electrolyte is divided into inorganic liquid electrolyte and organic liquid electrolyte, and solid electrolyte is divided into inorganic solid electrolyte and organic solid electrolyte. Comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/40H01M10/0567
CPCC07D317/40H01M10/0567H01M2300/0025Y02E60/10
Inventor 王志辉
Owner DATONG XINCHENG NEW MATERIAL CO LTD