Lithium battery diaphragm ceramic slurry with high temperature resistance and preparation method thereof

A ceramic slurry, high temperature resistance technology, used in lithium batteries, separators/films/diaphragms/spacers, circuits, etc., can solve problems such as poor dimensional stability, and achieve excellent heat resistance and coating technology. Simple, good heat resistant effect
CN109320134AInactive Publication Date: 2019-02-12SHANGHAI WEIKAI CHEM +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI WEIKAI CHEM
Publication Date
2019-02-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides lithium battery diaphragm ceramic slurry with high temperature resistance. The lithium battery diaphragm ceramic slurry is prepared from the following ingredients in parts by weight: 15 to 75 parts of heat-resistant ceramic, 3 to 10 parts of a bonding agent, 0.5 to 5 parts of an auxiliary agent and 40 to 65 parts of a solvent, wherein the heat-resistant ceramic is prepared from at least two of ceramic particles, ceramic crystal whiskers and ceramic nanometer sheets. The lithium battery diaphragm ceramic slurry is applied to a lithium battery polymer diaphragm; a formulaand a preparation method of the ceramic slurry with high temperature resistance are provided. The ceramic slurry coats a lithium battery diaphragm surface by a coating process. Compared with the priorart, the lithium battery diaphragm ceramic slurry has the advantages that the ceramic slurry is prepared from the same / different ceramics with different microtopography according to various proportions, so that the temperature resistance of a ceramic coating diaphragm is effectively improved; the dimensional change during the diaphragm heating is reduced; the short circuit generated when positiveand negative electrodes are in contact is avoided.
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Description

technical field

[0001] The invention relates to the technical field of diaphragm coatings, in particular to a lithium battery diaphragm ceramic slurry with high temperature resistance and a preparation method thereof. Background technique

[0002] Separators are an important component in lithium-ion batteries. Lithium battery diaphragm needs to have two aspects of performance, one is to avoid the short circuit of the positive and negative contacts of the battery, and the other is to satisfy the lithium ions during the charging and discharging process of the lithium battery, so as to complete the storage and release of electric energy. The performance of the lithium battery separator plays a very important role in the performance of the lithium battery. The dimensional stability of the separator is an important factor to ensure the safety of the battery. When the battery is operated at sudden abnormal high temperature, good dimensional stability can ensure that the battery ...

Claims

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