Lithium battery electrolyte-resistant adhesive, preparation method and adhesive tape for lithium battery

A lithium battery and electrolyte technology, which is applied in the manufacture of electrolyte batteries, adhesives, adhesive additives, etc., can solve problems such as failure to meet application requirements, uneven tape structure, poor electrolyte resistance, etc.

Active Publication Date: 2020-09-18
佛山市顺德区永创翔亿电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent is difficult to solve the compatibility problem of rubber and acrylic pressure-sensitive adhesive, which is prone to phase separation and non-uniform tape structure.
As lithium batteries require thinner and thinner tapes for assembly, the acrylic pressure-sensitive adhesive coating becomes thinner, and the electrolyte resistance is worse, which cannot meet the application requirements.

Method used

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  • Lithium battery electrolyte-resistant adhesive, preparation method and adhesive tape for lithium battery
  • Lithium battery electrolyte-resistant adhesive, preparation method and adhesive tape for lithium battery
  • Lithium battery electrolyte-resistant adhesive, preparation method and adhesive tape for lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] It is a special electrolyte-resistant adhesive for lithium batteries and an electrolyte-resistant adhesive tape, which is prepared by the following steps. Step 1 synthesizes the electrolyte-resistant adhesive by mixing 45 parts of stearyl acrylate (SA), 4 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 1 part of acrylonitrile (AN), 2 parts of tetrahydrofuran acrylate (THFA), 0.05 part of free radical initiator tert-butyl peroxymaleate Esters (TBMA), 0.1 parts of ferric chloride, 0.2 parts of triphenylphosphine and 100 parts of toluene were mixed, and after 30 minutes of nitrogen deoxygenation, the temperature was controlled at 90 ° C, and the reverse atom was carried out under the protection of nitrogen. Transfer radical polymerization (R-ARTP) polymerization reaction for 5 hours, the number average molecular weight (Mn) is controlled to 165000, the molecular weight polydispersity coefficient is controlled to 1.4, the reaction temperature is lowered to 30...

Embodiment 2

[0033]It is a special electrolyte-resistant adhesive for lithium batteries and an electrolyte-resistant adhesive tape, which is prepared by the following steps. Step 1 synthesizes the electrolyte-resistant adhesive by mixing 35 parts of stearyl acrylate (SA), 7 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 2 parts of acrylonitrile (AN), 1 part of tetrahydrofuran acrylate (THFA), 0.1 part of free radical initiator tert-butyl peroxymaleate Esters (TBMA), 0.2 parts of ferric chloride, 0.3 parts of triphenylphosphine and 80 parts of ethyl acetate were mixed, deoxygenated with nitrogen gas for 60 minutes, the temperature was controlled at 80 °C, and the reaction was carried out under nitrogen protection. To Atom Transfer Radical Polymerization (R-ARTP) polymerization reaction for 10 hours, the number average molecular weight (Mn) is controlled to be 84000, the molecular weight polydispersity coefficient is controlled to be 1.3, and the reaction temperature is lower...

Embodiment 3

[0037] It is a special electrolyte-resistant adhesive and an electrolyte-resistant adhesive tape for lithium batteries, which are prepared by the following steps. Step 1 synthesizes an electrolyte-resistant adhesive by mixing 30 parts of stearyl acrylate (SA), 9 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 1 part of acrylonitrile (AN), 2 parts of tetrahydrofuran acrylate (THFA), 0.3 parts of free radical initiator tert-butyl peroxymaleate Esters (TBMA), 0.3 parts of ferric chloride, 0.5 parts of triphenylphosphine and 70 parts of ethyl acetate were mixed, deoxygenated with nitrogen for 100 minutes, the temperature was controlled at 85 °C, and the reaction was carried out under the protection of nitrogen. To Atom Transfer Radical Polymerization (R-ARTP) polymerization reaction for 15 hours, the number average molecular weight (Mn) is controlled to be 48000, the molecular weight polydispersity coefficient is controlled to be 1.2, the reaction temperature is low...

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Abstract

The invention relates to an adhesive tape for a lithium battery, in particular to an electrolyte-resistant adhesive for a lithium battery, a preparation method thereof, and an adhesive tape for a lithium battery. An electrolyte-resistant adhesive for a lithium battery, comprising 20 to 50 parts of stearyl acrylate, 1 to 10 parts of 4-methacryloxyethyl trimellitic anhydride, 1 to 5 parts of acrylonitrile, 1 to 4 Parts of tetrahydrofuran acrylate, 0.001 to 0.5 parts of free radical initiator tert-butyl peroxymaleate, 0.001 to 1 part of ferric chloride, 0.01 to 2 parts of triphenylphosphine, 50 to 150 parts of organic Solvent, 1-10 parts of epoxidized polybutadiene and 0.1-1 part of curing accelerator; the above are parts by mass. The invention improves the electrolyte resistance performance of the adhesive tape in a high-temperature environment, and solves the problem of poor compatibility of traditional rubber-modified acrylate pressure-sensitive adhesives. The invention introduces tetrahydrofuran acrylate functional monomer, which can further enhance the binding ability of the acrylate pressure-sensitive adhesive in the electrolyte.

Description

technical field [0001] The invention relates to an adhesive tape for a lithium battery, in particular to an electrolyte-resistant adhesive for a lithium battery, a preparation method thereof, and an adhesive tape for a lithium battery. Background technique [0002] Lithium-ion batteries have the characteristics of light weight, large energy storage, high power, and no pollution. They are more and more widely used in various fields. Its research and production have achieved rapid development. Lithium-ion batteries are used as power in electric vehicles. Energy has become a new trend in the development of electric vehicles. In the assembly and production process of lithium-ion batteries, special tapes are generally used to fix, insulate and protect the cells, tabs and termination parts of lithium-ion batteries. This special adhesive tape for lithium batteries usually uses a polymer film as the base material, and on this basis, it is coated with a special glue resistant to lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J11/08C09J7/25C09J7/20C09J7/38C08F220/18C08F220/32C08F220/40C08F220/48H01M10/058
CPCC08F220/18C09J11/08C09J133/08C09J2203/33C09J2467/006C09J7/201C09J7/25C09J7/385C08F220/1818C09J2301/122C09J2301/302C09J2301/408H01M10/058C08L47/00C08F220/32C08F220/40C08F220/48Y02E60/10Y02P70/50
Inventor 叶志斌曾丽娟刘锋
Owner 佛山市顺德区永创翔亿电子材料有限公司
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