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Modified alumina, alumina slurry and preparation method thereof, ceramic coated lithium battery diaphragm and preparation method thereof

A lithium battery separator and ceramic coating technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of complicated water removal process of ceramic coated separator, high moisture content of ceramic coated separator, and low moisture content of separator. , to achieve the effect of good dispersion, good compatibility and inhibition of mutual agglomeration

Active Publication Date: 2021-03-16
LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a modified alumina, Alumina slurry and its preparation method, ceramic coated lithium battery diaphragm and its preparation method, the alumina slurry has excellent storage stability, and the ceramic coated lithium battery diaphragm prepared by coating thereof has low water content, The moisture in the diaphragm is easy to remove, and the process is simple, which is suitable for industrial production

Method used

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  • Modified alumina, alumina slurry and preparation method thereof, ceramic coated lithium battery diaphragm and preparation method thereof
  • Modified alumina, alumina slurry and preparation method thereof, ceramic coated lithium battery diaphragm and preparation method thereof
  • Modified alumina, alumina slurry and preparation method thereof, ceramic coated lithium battery diaphragm and preparation method thereof

Examples

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Effect test

preparation example 1

[0120] Add 0.5 parts of AA / AMPS and 99.5 parts of alumina powder into a high-speed mixer for mixing for 1 hour, then dry at 110°C for 2 hours to obtain modified alumina powder I.

preparation example 2

[0122] Add 0.5 parts of TM-613 and 99.5 parts of alumina powder into a high-speed mixer for mixing for 1 hour, then dry at 110°C for 2 hours to obtain modified alumina powder II.

preparation example 3

[0124] Add 0.5 parts of T-225 and 99.5 parts of alumina powder into a high-speed mixer for mixing for 1 hour, then dry at 110°C for 2 hours to obtain modified alumina powder III.

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Abstract

The invention relates to the field of lithium batteries, and discloses modified aluminum oxide, aluminum oxide paste, a preparation method of aluminum oxide paste, method for preparing a ceramic coating lithium battery diagram. The modified aluminum oxide is obtained by mixing and drying a modifying agent and aluminum oxide powder, wherein the mass ratio of the aluminum oxide powder and the modifying agent is (98.5-99.7):(0.3-1.5), and the modifying agent is one or more of an acrylic acid-hydroxypropyl acrylate copolymer, an acrylic acid-acrylamide-methylpropane sulfonic acid copolymer and acrylic acid-acrylate-sulfonate copolymer. The aluminum oxide paste comprising 40-70wt% of modified aluminum oxide, 40-70wt% of water, 5-15wt% of binding agent, 0.25-1.5wt% of thickening agent and 0.75-3wt% of wetting agent has excellent storage stability, the ceramic coating lithium battery diagram prepared by coating is low in moisture content, the moisture in the diagram is easy to remove, and theprocess is simple and convenient and can be suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, and relates to a modified alumina, an alumina slurry and a preparation method thereof, and a ceramic-coated lithium battery separator and a preparation method thereof. Background technique [0002] Lithium-ion batteries are widely used in electronic products, power drives, energy storage and other fields due to a series of advantages such as excellent electrical properties, long service life, and environmental protection. As an important component of the lithium battery, the separator mainly plays the role of isolating the positive and negative electrodes of the lithium battery, preventing electronic conduction, and at the same time ensuring the smooth passage of lithium ions, which has a great impact on the safety of the battery. [0003] At present, ceramic coated separators have been widely used in actual production. Ceramic coating can greatly improve the heat resistance and wettabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/403H01M50/44H01M50/434
CPCH01M50/403H01M50/411H01M50/431H01M50/44Y02E60/10
Inventor 张聪毅尚兴记裴广斌陈成李岱郭莹莹张军恒
Owner LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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