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A kind of borate compound and preparation method thereof and electrolyte containing same

A boric acid ester and compound technology, which is applied in chemical instruments and methods, compounds containing elements of Group 3/13 of the periodic table, circuits, etc., can solve problems such as unsatisfactory and the electrochemical performance of lithium ion batteries needs to be improved, etc. , to achieve the effect of improving electrochemical performance and safety performance, improving cycle stability and simple synthesis process

Active Publication Date: 2022-07-08
TIANMU LAKE INST OF ADVANCED ENERGY STORAGE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrochemical performance of the above-mentioned lithium-ion battery that includes the electrolyte of additives needs to be improved, especially the cycle stability at low temperature and high temperature, which is still not satisfactory.

Method used

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  • A kind of borate compound and preparation method thereof and electrolyte containing same
  • A kind of borate compound and preparation method thereof and electrolyte containing same
  • A kind of borate compound and preparation method thereof and electrolyte containing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0055] Preparation Example 1: Preparation of a benzenesulfonyl-containing thiophene boronate compound represented by formula (III)

[0056]

[0057] The specific reaction principle is as follows:

[0058]

[0059] The specific preparation steps are:

[0060] (1) Raw material pretreatment: heat and distill tetrahydrofuran, and use sodium metal to dry and remove water at the same time, so that the purity of tetrahydrofuran is greater than 99.9%, and the water content is reduced to below 50ppm. Triethylamine is heated and fractionated to obtain a colorless and transparent triethylamine solution, and then activated 4A molecular sieve is added to make the triethylamine moisture lower than 50ppm. 2-thiophene boronic acid and benzenesulfonyl chloride were added to activated 4A molecular sieves, respectively, so that the moisture content of 2-thiophene boronic acid and benzenesulfonyl chloride was less than 50 ppm.

[0061] (2) The preparation reaction of the thiophene group-c...

preparation example 2

[0067] Preparation Example 2: Preparation of benzenesulfonyl-containing thiophene boronate compound represented by formula (IV)

[0068]

[0069] The specific reaction principle is as follows:

[0070]

[0071] The specific preparation steps are:

[0072] (1) Raw material pretreatment: heat and distill tetrahydrofuran, and use sodium metal to dry and remove water at the same time, so that the purity of tetrahydrofuran is greater than 99.9%, and the water content is reduced to below 50ppm. Triethylamine is heated and fractionated to obtain a colorless and transparent triethylamine solution, and then activated 4A molecular sieve is added to make the triethylamine moisture lower than 50ppm. 2-thiophene boronic acid and benzenesulfinyl chloride were respectively added to activated 4A molecular sieves, so that the moisture content of 2-thiophene boronic acid and benzenesulfinyl chloride was less than 50 ppm.

[0073] (2) The preparation reaction of the thiophene group-conta...

preparation example 3

[0079] Preparation Example 3: Preparation of benzenesulfonyl-containing thiophene boronate compound represented by formula (V)

[0080]

[0081] The specific reaction principle is as follows:

[0082]

[0083] The specific preparation steps are:

[0084] (1) Raw material pretreatment: heat and distill tetrahydrofuran, and use sodium metal to dry and remove water at the same time, so that the purity of tetrahydrofuran is greater than 99.9%, and the water content is reduced to below 50ppm. Triethylamine is heated and fractionated to obtain a colorless and transparent triethylamine solution, and then activated 4A molecular sieve is added to make the triethylamine moisture lower than 50ppm. 2-thiophene boronic acid and benzenesulfenyl chloride were added to activated 4A molecular sieves before use, so that the moisture content of 2-thiophene boronic acid and benzenesulfenyl chloride was less than 50 ppm.

[0085] (2) The preparation reaction of the thiophene group-containi...

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Abstract

The present invention provides a borate compound and a preparation method thereof, and a lithium ion battery electrolyte including the borate compound. The S-containing heterocycles in the boric acid ester compound provided by the present invention, such as thienyl and aryl groups, have the characteristics of being polymerized into a film at the positive electrode. High temperature performance of the battery. In addition, the polymer film can stabilize the electrode structure, inhibit the dissolution of transition metals, reduce side reactions at the interface between the positive electrode and the electrolyte, and improve the electrochemical performance and safety performance of the battery.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a benzenesulfonyl-containing thiophene boronate compound and a lithium ion battery electrolyte containing the same. Background technique [0002] Due to the characteristics of high energy density, high voltage, long life, no memory effect, and no pollution, lithium-ion batteries are widely used in portable electronic products such as mobile phones, digital cameras, and personal computers. wider development. With the advancement of technology and the continuous development of the market, it is increasingly important and urgent to improve the energy density of lithium batteries. The way to improve energy density can be achieved by using high specific capacity materials or high voltage cathode materials. [0003] The high energy density of the battery can be achieved by increasing the charging depth of the positive active material, but increasing the voltage of the battery will br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/02H01M10/0525H01M10/0567H01M10/42
CPCC07F5/025H01M10/0567H01M10/0525H01M10/4235Y02E60/10
Inventor 黄建李立飞
Owner TIANMU LAKE INST OF ADVANCED ENERGY STORAGE TECH CO LTD
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