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Black adhesive for aluminum plastic film composite of lithium battery and preparation method thereof

A technology of aluminum-plastic film and lithium battery, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems of destroying the bonding effect between composite layers, changing the concentration of electrolyte components, and affecting the electrical performance of lithium batteries. , to achieve the effects of increased life, good chemical corrosion resistance, and good corrosion resistance

Active Publication Date: 2019-05-14
JIANGXI MING CROWN LITHIUM MEMBRANE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium battery aluminum-plastic film is used for lithium battery packaging, and the inside is covered with electrolyte. Various organic solvents in the electrolyte usually swell, dissolve, and absorb flexible packaging materials. They are good solvents for adhesives and will damage the composite layer. The bonding effect of the electrolyte changes the concentration of the components in the electrolyte, which in turn affects the electrical properties of the lithium battery.

Method used

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  • Black adhesive for aluminum plastic film composite of lithium battery and preparation method thereof
  • Black adhesive for aluminum plastic film composite of lithium battery and preparation method thereof
  • Black adhesive for aluminum plastic film composite of lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of black adhesive for aluminum-plastic film composite of lithium battery, comprises the raw material of following weight part:

[0025]

[0026] Wherein, the curing agent is an aliphatic polyisocyanate curing agent.

[0027] Wherein, the -NCO content of the curing agent is 6 mol%.

[0028] Wherein, the organic solvent is composed of ethyl acetate, butanone and toluene in a weight ratio of 2:1.5:1.5.

[0029] Wherein, the carbon black is nano-carbon black, and the particle size of the nano-carbon black is 40nm.

Embodiment 2

[0031] A kind of black adhesive for aluminum-plastic film composite of lithium battery, comprises the raw material of following weight part:

[0032]

[0033] Wherein, the curing agent is an aliphatic polyisocyanate curing agent.

[0034] Wherein, the -NCO content of the curing agent is 5 mol%.

[0035] Wherein, the organic solvent is composed of ethyl acetate, butanone and toluene in a ratio of 1:1:1 by weight.

[0036] Wherein, the carbon black is nano-carbon black, and the particle size of the nano-carbon black is 40nm.

Embodiment 3

[0038] A kind of black adhesive for aluminum-plastic film composite of lithium battery, comprises the raw material of following weight part:

[0039]

[0040]

[0041] Wherein, the curing agent is an aliphatic polyisocyanate curing agent.

[0042] Wherein, the -NCO content of the curing agent is 7 mol%.

[0043] Wherein, the organic solvent is composed of ethyl acetate, butanone and toluene in a ratio of 3:2:2 by weight.

[0044] Wherein, the carbon black is nano carbon black, and the particle size of the nano carbon black is 50nm.

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Abstract

The invention relates to the technical field of aluminum plastic films of lithium batteries, in particular to a black adhesive for an aluminum plastic film composite of a lithium battery and a preparation method thereof. The black adhesive includes 120-240 parts of polyurethane resin, 10-30 parts of curing agents, 100-300 parts of organic solvent, 5-10 parts of carbon black and 0.1-0.3 part of dispersant. The black adhesive for the aluminum plastic film composite of the lithium battery has the advantages of having good chemical corrosion resistance with the carbon black added to a polyurethaneadhesive, enabling nano carbon black to be evenly dispersed in the adhesive with the dispersant added so as to ensure uniform color and high inter-layer composite strength when the aluminum plastic film of the lithium battery is composite, helping identify the appearance defects that are created during the manufacturing process with the aluminum plastic film of the lithium battery produced to beblack in appearance, and guaranteeing the produced lithium battery to be of high quality and long service life.

Description

technical field [0001] The invention relates to the technical field of aluminum-plastic films of lithium batteries, in particular to a black adhesive for compounding aluminum-plastic films of lithium batteries and a preparation method thereof. Background technique [0002] Lithium battery aluminum-plastic film is used for lithium battery packaging, and the inside is covered with electrolyte. Various organic solvents in the electrolyte usually swell, dissolve, and absorb flexible packaging materials. They are good solvents for adhesives and will damage the composite layer. The bonding effect of the electrolyte changes the concentration of the components in the electrolyte, which in turn affects the electrical properties of the lithium battery. For a long time, chemical corrosion resistance has been the focus of research and development of aluminum-plastic film for lithium batteries. [0003] The existing lithium battery aluminum-plastic film is mainly composed of transparent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04
CPCC09J11/04C09J175/04
Inventor 梅芳芳李成利张鹏张曙光张辉丁新聂旭峰陈小宜
Owner JIANGXI MING CROWN LITHIUM MEMBRANE TECH CO LTD
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