A preparation method of modified barium titanate material, battery diaphragm and lithium ion battery

A barium titanate and modified technology, applied in secondary batteries, battery pack parts, secondary battery repair/maintenance, etc., can solve problems such as functional monomer limitations, improve electrochemical performance, improve powder removal, The effect of high liquid retention effect

Active Publication Date: 2020-08-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology can only achieve one-dimensional preparation, and the functional monomer is limited to BPS

Method used

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  • A preparation method of modified barium titanate material, battery diaphragm and lithium ion battery
  • A preparation method of modified barium titanate material, battery diaphragm and lithium ion battery
  • A preparation method of modified barium titanate material, battery diaphragm and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of modified barium titanate powder

[0035] a) adding barium titanate particles (particle size: 50nm) and hexachlorocyclotriphosphazene into the reaction solvent acetonitrile at a mass ratio of 1:1, and ultrasonically dispersed for 2 hours to obtain the first mixed solution;

[0036] b) Then, add the monomer 1,4-butanediol and the catalyst triethylamine, stir the reaction at 25°C for 4h, filter, wash the solid product alternately with deionized water and acetone, and dry it by blowing at 80°C to obtain a solid powder .

[0037] Wherein, the reaction molar ratio of hexachlorocyclotriphosphazene, 1,4-butanediol and triethylamine is 1:3:6.

[0038] 2. Preparation of coating slurry

[0039] Add the solid powder to the first solvent and stir. Wherein, the mixing mass ratio of the solid powder and the first solvent is 1:5, and the first solvent is deionized water. In other embodiments, the first solvent may also be acetone or ethanol, or two or three of wat...

Embodiment 2

[0043] 1. Preparation of modified barium titanate powder

[0044] a) adding barium titanate particles (particle size: 1 μm) and hexachlorocyclotriphosphazene into the reaction solvent acetonitrile at a mass ratio of 1:1, and ultrasonically dispersed for 2 hours to obtain the first mixed solution;

[0045] b) Then, add the monomer 1,4-butanediol and the catalyst triethylamine, stir the reaction at 25°C for 4h, filter, wash the solid product alternately with deionized water and acetone, and dry it by blowing at 80°C to obtain a solid powder .

[0046] Wherein, the reaction molar ratio of hexachlorocyclotriphosphazene, 1,4-butanediol and triethylamine is 1:3:6.

[0047] 2. Preparation of coating slurry

[0048] Add the solid powder to the first solvent and stir. Wherein, the mixing mass ratio of the solid powder and the first solvent is 1:5, and the first solvent is deionized water.

[0049] 3. Assemble the lithium-ion battery

[0050] The coating slurry is evenly coated on ...

Embodiment 3

[0052] 1. Preparation of modified barium titanate powder

[0053] a) adding barium titanate particles (particle size: 50nm) and hexachlorocyclotriphosphazene into the reaction solvent acetonitrile at a mass ratio of 1:1, and ultrasonically dispersed for 2 hours to obtain the first mixed solution;

[0054] b) Then, add the monomer 1,4-butanediol and the catalyst triethylamine, stir the reaction at 25°C for 4h, filter, wash the solid product alternately with deionized water and acetone, and dry it by blowing at 80°C to obtain a solid powder .

[0055] Wherein, the reaction molar ratio of hexachlorocyclotriphosphazene, 1,4-butanediol and triethylamine is 1:6:6.

[0056] 2. Preparation of coating slurry

[0057] Add the solid powder to the first solvent and stir. Wherein, the mixing mass ratio of the solid powder and the first solvent is 1:5, and the first solvent is deionized water.

[0058] 3. Assemble the lithium-ion battery

[0059] The coating slurry is evenly coated on ...

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Abstract

The invention belongs to the field of lithium ion batteries, and particularly relates to a preparation method of a modified barium titanate material, and a battery diaphragm and lithium ion battery. The preparation method provided by the invention comprises the following steps: dispersing barium titanate particles, phosphonitrilic chloride trimer, a monomer and a catalyst in a reaction solvent andcarrying out a reaction, wherein the monomer is polyol or polyol sodium. According to the invention, flexible polyphosphazene coats the surfaces of barium titanate particles, so that the modified barium titanate material has the effect of high liquid retention, the electrolyte does not volatilize easily, the increase rate of resistance is slow, the polarization effect of barium titanate is reduced, and the service life of the battery is improved.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a preparation method of a modified barium titanate material, a battery diaphragm and a lithium ion battery. Background technique [0002] As a new generation of energy storage power supply, lithium-ion batteries are widely used in information technology, electric vehicles, aerospace and other fields. As one of the core components of lithium-ion batteries, the battery separator is mainly used to isolate the positive and negative electrodes and provide a channel for the shuttle of lithium ions. The traditional lithium-ion battery separator is a polyolefin microporous membrane. The polyolefin microporous membrane is a non-polar material, which has poor wettability to the electrolyte and has a large shrinkage rate at high temperatures. Poor wettability will affect the electrochemical performance of the battery; high shrinkage at high temperature can easily lead to co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00H01M2/16H01M10/0525H01M10/42
CPCC09D1/00H01M10/0525H01M10/4235H01M50/431Y02E60/10
Inventor 雷彩红田子钦徐睿杰
Owner GUANGDONG UNIV OF TECH
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