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Adhesive for ceramic membrane coating of lithium ion battery and preparation method of adhesive

A technology of lithium-ion batteries and ceramic diaphragms, applied in the field of water-based adhesives and water-based acrylate adhesives, can solve problems such as threats to health, low bonding strength, and environmental hazards, and achieve excellent adhesion and adhesion Enhanced strength and improved solvent resistance

Active Publication Date: 2014-02-12
CHINA HAISUM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVDF is an adhesive based on organic solvents, such as N-methylpyrrolidone (NMP), N, N-dimethylformamide (DMF), and such organic solvents are harmful to the environment and pose a threat to the health of workers. Threat; styrene-butadiene emulsion (SBR) is a water-based binder, which has little pollution and is environmentally friendly, but its bonding strength is small, and due to its chemical characteristics, it can only be used as a binder for negative electrode material powder. Applications in ceramic diaphragm coatings are also limited

Method used

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  • Adhesive for ceramic membrane coating of lithium ion battery and preparation method of adhesive
  • Adhesive for ceramic membrane coating of lithium ion battery and preparation method of adhesive
  • Adhesive for ceramic membrane coating of lithium ion battery and preparation method of adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: Preparation of Water-Based Binder for Lithium Battery Ceramic Diaphragm Coating

[0027] A binder for lithium-ion battery ceramic diaphragm coating, its raw materials include: 1% epoxy resin, 9% monomer a, 6% monomer b, 2% monomer c, 2% amide monomer, emulsifier 1 %, initiator 0.4%, neutralizer 2%, deionized water 76.6%.

[0028] The preparation method of the binder used for lithium-ion battery ceramic diaphragm coating is: add deionized water 45g, sodium lauryl sulfate 0.6g, OP-100.4g in a four-necked flask, stir and dissolve, and heat up to 50 ℃. Dissolve 1g of E-44 in a mixture of BA5g, MMA4g, St6g and AA2g to obtain a monomer mixture. Take 1 / 4 of the monomer mixture and add it to a four-necked flask for pre-emulsification for 30 minutes. Stir and dissolve 0.4 g of potassium persulfate in 16.6 g of deionized water to prepare an aqueous initiator solution. Stir and dissolve 2g of AM in 15g of deionized water to form an aqueous solution of acrylamide. Ta...

Embodiment 2

[0029] Example 2 Preparation of Water-Based Adhesive for Lithium Battery Ceramic Diaphragm Coating

[0030] A kind of binder that is used for lithium-ion battery ceramic diaphragm coating, its raw material comprises: Epoxy resin 0 . 5 %, monomer a15%, monomer b4%, monomer c1%, amide monomer 1%, emulsifier 0.5%, initiator 0 . 1 %, neutralizer 1%, deionized water 76.9%.

[0031]The preparation method of the adhesive used for lithium-ion battery ceramic diaphragm coating is: add deionized water 40g, sodium lauryl sulfate 0.3g, OP-100.2g in a four-necked flask, stir and dissolve, and heat up to 50 ℃. Dissolve 0.5g of E-51 in a mixed solution consisting of 6g of isooctyl acrylate, MMA9g, St4g and AA1g to obtain a monomer mixed solution, take 1 / 4 of the monomer mixed solution and add it to a four-necked flask for pre-emulsification for 30min . Stir and dissolve 0.1 g of potassium persulfate in 18.9 g of deionized water to prepare an aqueous initiator solution. Stir and dissol...

Embodiment 3

[0032] Example 3 Preparation of Water-Based Adhesive for Lithium Battery Ceramic Diaphragm Coating

[0033] A binder for lithium-ion battery ceramic diaphragm coating, its raw materials include: 2% epoxy resin, 5% monomer a, 10% monomer b, 5% monomer c, 5% amide monomer, emulsifier 1 %, initiator 0.5%, neutralizer 5%, deionized water 66.5%.

[0034] The preparation method of the binder used for lithium-ion battery ceramic diaphragm coating is: add deionized water 30g, sodium lauryl sulfate 0.6g, OP-100.4g in a four-necked flask, stir and dissolve, and heat up to 50 ℃. Dissolve 2g of E-44 in a mixture composed of BA4g, MMA1g, α-methylstyrene 10g and AA5g to obtain a monomer mixture, take 1 / 4 of the monomer mixture and add it to a four-necked flask for pre-emulsification 30min. Stir and dissolve 0.5 g of ammonium persulfate in 20.5 g of deionized water to prepare an aqueous initiator solution. Stir and dissolve 5 g of diacetone acrylamide in 16 g of deionized water to prepar...

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Abstract

The invention provides an adhesive for a ceramic membrane coating of a lithium ion battery and a preparation method of the adhesive. The adhesive for the ceramic membrane coating of the lithium ion battery is characterized by comprising the materials in weight percentage: 0.5-2% of epoxy resin, 5-15% of monomer a, 4-10% of monomer B, 1-5% of monomer c, 1-5% of amides monomer, 0.5-1% of emulgator, 0.1-0.5% of initiator, 1-5% of neutralizer, and 56.5-86.9% of deionized water, wherein the monomer a is an acrylate monomer, the monomer b is at least one of vinyl monomer and nitrile monomer, and the monomer c is an unsaturated acid monomer. The adhesive for the ceramic membrane coating of the lithium ion battery is excellent in adhesion force, solvent resistance and thermal stability.

Description

technical field [0001] The invention relates to a water-based adhesive for lithium-ion battery ceramic diaphragm coating, in particular, the invention relates to a kind of water-based adhesive which is modified by epoxy resin grafting and is prepared by copolymerization of four or more than four monomers. A water-based acrylate adhesive belongs to the technical field of lithium batteries. Background technique [0002] With the popularity of mobile phones, notebook computers, digital cameras and other electronic equipment, my country's lithium battery market has achieved unprecedented development; at the same time, electric vehicles, hybrid vehicles, and power system energy storage batteries have also begun to show their heads and feet. Show broad prospects for development. [0003] Lithium batteries are composed of positive and negative electrode materials, electrolyte, diaphragm and battery casing packaging materials. The diaphragm is an important part of the lithium-ion b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/10C08G59/17C08F283/10
Inventor 陈宗明贺磊迟婷玉吴立群
Owner CHINA HAISUM ENG