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Closed porous ceramic composite material and its preparation method and application

A technology of porous ceramics and composite materials, used in structural parts, electrical components, battery pack parts, etc., can solve the problems of loss of ion-conducting effect of the separator, unsatisfactory application effect, and high oil absorption value, and reduce sedimentation defects and thickness. Requires thin, cost-effective effects

Active Publication Date: 2021-07-27
东莞市赛普克电子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The problems of the prior art solved by the present invention are: in the prior art, the specific surface of the porous ceramic powder itself is larger, and the oil absorption value is higher, and more non-conductive adhesive will be consumed when preparing the slurry. It may cause the isolation membrane to lose its ion-conducting effect, and the actual application effect is not ideal

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  • Closed porous ceramic composite material and its preparation method and application
  • Closed porous ceramic composite material and its preparation method and application
  • Closed porous ceramic composite material and its preparation method and application

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preparation example Construction

[0057] The invention provides a preparation method and application of a porous ceramic isolation membrane. The porous ceramic isolation membrane uses porous ceramic powder as an inorganic filler.

[0058] By pre-closing the porous structure of the porous ceramic separator before preparing the slurry, the amount of adhesive can be reduced when preparing the slurry, and then the porous ceramic-coated separator is leached to remove the closed cells. The agent regains the porous ceramic structure, thereby improving the liquid-carrying performance of the separator, and at the same time can promote the thinning of lithium-ion batteries and improve the safety performance of lithium-ion batteries, which is conducive to expanding the application scenarios of lithium-ion batteries.

[0059] In the preferred ceramic isolation membrane prepared by porous ceramic powder in the present invention, a ceramic coating whose main component is porous ceramic powder is coated on the membrane.

[0...

Embodiment 1

[0084] Take by weighing 42.3kgα type aluminum oxide (D v50 : 0.2μm, Al 2 o 3 α-Al in powder 2 o 3 Content: 95%; Al 2 o 3 The powder accounts for the dry matter content of the coating composition on the diaphragm: 92.09wt%) into a 100L kneader, and under stirring, add 3.2kg of bis(2-ethylhexyl) phthalate (DEHP) and rotate at a speed of Stir at 40 rpm for 30 min to obtain closed porous ceramic composite material 1#.

[0085] Take 70kg of deionized water and add it to a 200L double planetary mixing tank with cooling circulating water, then add 1.5kg of sodium carboxymethylcellulose and 0.5kg of polyvinylidene fluoride (Solef6020) powder to fully disperse and dissolve, and the dissolution is complete Finally, add the composite material 1# into the mixing tank and continue to stir for 60min, then adjust the rotating speed to 20rpm, add 3.4kg of styrene-butadiene latex (solid content 48wt%) and stir for 30min, and obtain the slurry for coating after filtering through a 200-mes...

Embodiment 2

[0088] Weigh 55.8kg gamma type aluminum oxide (D v50 : 1.8 μm, γ-Al 2 o 3 Content: 97%; Al 2 o 3 Powder accounts for the dry matter content of the coating composition on the diaphragm: 92.14wt%) in a 100L fusion machine, then add 4.3kg of dioctyl phthalate (DOP) cell-closing agent, open the fusion machine and disperse for 20 minutes, and the closed cell is obtained. Porous ceramic composite material 2#.

[0089] Take 79kg of deionized water and add it to a 200L double planetary mixing tank with cooling circulating water, then add 1.9kg sodium carboxymethylcellulose and 0.7kg polyvinylidene fluoride (KYNAR 761) powder to fully disperse / dissolve, After the dissolution is complete, add the composite material 2# to the stirring tank and continue to stir for 90min, then adjust the rotating speed to 20rpm, add 4.5kg of styrene-butadiene latex and stir for 30min to obtain the slurry for coating after filtering through a 200-mesh screen. The diaphragm pump is introduced into the ...

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Abstract

The invention relates to a closed porous ceramic composite material and its preparation method and application. In the closed porous ceramic composite material of the present invention, the open pores of the porous ceramic are filled and closed by organic matter, and are further made into a porous ceramic isolation membrane. Compared with the existing same type of diaphragm materials prepared by the technology of the present invention, the porous ceramic separator has the advantages of good liquid-carrying property, good coating adhesion, and good heat dissipation, and can be widely used in power batteries (xEV ), intelligent mobile terminals (3C) and energy storage power stations (ESS) and other fields, it shows excellent wetting properties, which is conducive to the lightweight and miniaturization of lithium-ion battery products, and the economic effect is obvious.

Description

technical field [0001] The invention relates to lithium battery preparation technology, in particular to a preparation method and application of a closed porous ceramic composite material. Background technique [0002] In recent years, with the rise of smart phones, smart cars, and new energy vehicles, more and more mobile devices have become data collection points and integration points for big data, Internet of Things, etc. The speed of mobile devices is getting faster and faster, and the energy consumption is getting higher and higher. While providing energy to mobile terminals, with the improvement of people's material life, mobile devices are becoming more portable and multi-functional. Take mobile phones as an example. At present, smart phones have replaced home TV sets as the first screen in people's lives. With the intelligentization and electrification of cars in the future, smart cars may become the second screen in people's daily life. Similarly, for lithium-ion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/403H01M50/446H01M50/434H01M50/44H01M50/443H01M50/449H01M50/489H01M50/491H01M10/0525H01M50/411
CPCH01M10/0525H01M50/431H01M50/403H01M50/449Y02E60/10
Inventor 许瑞许刚赖旭伦
Owner 东莞市赛普克电子科技有限公司
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