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A kind of black adhesive for aluminum-plastic film composite of lithium battery and preparation method thereof

An aluminum-plastic film, lithium battery technology, applied in the directions of adhesives, adhesive types, adhesive additives, etc., can solve the problems of destroying the bonding effect between composite layers, affecting the electrical performance of lithium batteries, and changing the concentration of electrolyte components.

Active Publication Date: 2020-07-07
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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  • A kind of black adhesive for aluminum-plastic film composite of lithium battery and preparation method thereof
  • A kind of black adhesive for aluminum-plastic film composite of lithium battery and preparation method thereof
  • A kind of 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 lithium battery aluminum-plastic film, in particular to a black adhesive for lithium battery aluminum-plastic film compounding and a preparation method thereof. The adhesive includes 120-240 parts of polyurethane resin, 10-30 parts of curing agent, 100 parts ‑300 parts organic solvent, 5‑10 parts carbon black and 0.1‑0.3 dispersant. The adhesive of the present invention has good chemical corrosion resistance by adding carbon black to the polyurethane adhesive, adding a dispersant, can evenly disperse the nano-carbon black in the adhesive, and can ensure that the aluminum-plastic composite of the lithium battery Uniform color and high composite strength between layers. In addition, the appearance of the aluminum-plastic film of the lithium battery produced is black, which helps to identify the appearance defects generated during the manufacturing process, and the produced lithium battery product has 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 Patents(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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