Composite coating special for lithium battery and preparation method thereof

A composite coating and lithium battery technology, applied in coatings, anti-corrosion coatings, starch coatings, etc., can solve the problems of corrosive substances, unsafe, dusty, etc., to improve performance, good adhesion, reduce heat The effect of mutation

Pending Publication Date: 2019-05-24
无锡至极动能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Lithium batteries will encounter various emergencies during use, such as encountering water, ash, corrosive subst...

Method used

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  • Composite coating special for lithium battery and preparation method thereof
  • Composite coating special for lithium battery and preparation method thereof
  • Composite coating special for lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The invention provides a special composite coating for lithium batteries and a preparation method thereof. The special composite coating for lithium batteries includes the following raw materials in weight fractions: 20 parts of adhesive, 1 part of stabilizer, 5 parts of anticorrosion agent, secondary alkane 1 part of sodium sulfonate, 1 part of polyvinyl alcohol, 1 part of bentonite, 1 part of dextran, 10 parts of silica sol, 5 parts of solvent, and 3 parts of activated carbon.

[0032] The adhesive is water-based UV resin.

[0033] Described stabilizer is oleic acid.

[0034] The anticorrosion agent is water-based vaseline: water-based lanolin=1:1.

[0035] The solvent is water.

[0036] The activated carbon is in the form of black powder with a particle size of 100nm-200nm.

[0037] The special composite coating for lithium batteries can add 1 part of red dye according to user needs.

[0038] The special composite coating for lithium batteries is implemented by s...

Embodiment 2

[0046] The invention provides a special composite coating for lithium batteries and a preparation method thereof. The special composite coating for lithium batteries includes the following raw materials in weight fractions: 25 parts of adhesive, 2 parts of stabilizer, 6 parts of anticorrosion agent, secondary alkane 2 parts of sodium sulfonate, 1 part of polyvinyl alcohol, 2 parts of bentonite, 2 parts of dextran, 13 parts of silica sol, 8 parts of solvent, and 4 parts of activated carbon.

[0047] The adhesive is starch:shellac:water-based epoxy resin=1:1:3.

[0048] Described stabilizer is guar gum.

[0049] The anticorrosion agent is water-based vaseline.

[0050] Described solvent is deionized water.

[0051] The activated carbon is black powder with a particle size of 300-400nm.

[0052] In this example no dye was added.

[0053] The special composite coating for lithium batteries is implemented by brushing.

[0054] The invention provides a special composite coating...

Embodiment 3

[0061] The invention provides a special composite coating for lithium batteries and a preparation method thereof. The special composite coating for lithium batteries includes the following raw materials in weight fractions: 30 parts of adhesive, 3 parts of stabilizer, 7 parts of anticorrosion agent, secondary alkane 3 parts of sodium sulfonate, 2 parts of polyvinyl alcohol, 3 parts of bentonite, 3 parts of dextran, 15 parts of silica sol, 10 parts of solvent, and 5 parts of activated carbon.

[0062] The binder is water-based polyamide resin.

[0063] Described stabilizer is water glass.

[0064] The anticorrosion agent is water-based lanolin.

[0065] The solvent is water.

[0066] The activated carbon is black powder with a particle size of 300-500nm.

[0067] The special composite coating for lithium batteries can add 1 part of green dye according to user needs.

[0068] The special composite coating for lithium batteries is implemented by stick coating.

[0069] The inv...

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PUM

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Abstract

The invention discloses a composite coating special for a lithium battery and a preparation method thereof. The composite coating special for the lithium battery is prepared from, by weight, 20-30 parts of an adhesive, 1-3 parts of a stabilizer, 5-7 parts of an anticorrosive agent, 1-3 parts of seconary alkane sulphonate sodium, 1-2 parts of polyvinyl alcohol, 1-3 parts of bentonite, 1-3 parts ofglucan, 10-15 parts of silicon dioxide soil, 5-10 parts of solvents and 3-5 parts of activated carbon. The composite coating special for the lithium battery is higher in safety performance, good in thermal stability, high in mechanical strength and good in adhesive force, the implementation mode is simple, and the coating can be used in spray-coating, brush-coating and other modes.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a special composite coating for lithium batteries and a preparation method thereof. Background technique [0002] Unsafe behavior of lithium-ion batteries (including battery overcharge and overdischarge, rapid charge and discharge, short circuit, mechanical abuse conditions and high temperature thermal shock, etc.) can easily trigger dangerous side reactions inside the battery to generate heat, directly destroying the negative and positive electrodes passivation film on the surface. [0003] When the temperature of the battery cell rises to 130°C, the SEI film on the surface of the negative electrode decomposes, causing the highly active lithium carbon negative electrode to be exposed to the electrolyte to undergo a violent redox reaction, and the heat generated puts the battery into a high-risk state. When the local temperature inside the battery rises above 200°C, the passive ...

Claims

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Application Information

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IPC IPC(8): C09D201/00C09D129/04C09D163/00C09D103/02C09D193/02C09D177/00C09D7/61C09D7/63C09D5/08
Inventor 王崇翰程圣皓刘之浩
Owner 无锡至极动能科技有限公司
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