Modified nano ceramic particles, preparation method thereof, ceramic diaphragm slurry, preparation method thereof, diaphragm and lithium ion battery

A technology of nano-ceramic particles and ceramic separators, applied in secondary batteries, battery pack parts, circuits, etc., to achieve the effects of improved cycle performance and rate performance, good air permeability, and large specific surface area

Active Publication Date: 2020-08-25
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this scheme, the bonding force between the high ceramic powder, the binder and the electrolyte needs to be enhanced, and the performance of the ceramic coating needs to be further strengthened.

Method used

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  • Modified nano ceramic particles, preparation method thereof, ceramic diaphragm slurry, preparation method thereof, diaphragm and lithium ion battery
  • Modified nano ceramic particles, preparation method thereof, ceramic diaphragm slurry, preparation method thereof, diaphragm and lithium ion battery
  • Modified nano ceramic particles, preparation method thereof, ceramic diaphragm slurry, preparation method thereof, diaphragm and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] In this example, modified nano-ceramic particles and ceramic diaphragm slurry were prepared according to the following method:

[0076] (1) Mix the ceramic precursor (tetraethyl orthosilicate TEOS), water, and ammonia-containing substance (glucosamine) in the prescribed amount, and react at a temperature of 60°C under stirring conditions for a reaction time of 8 hours, centrifuge, filter, Dry to obtain nano-ceramic particles with amino groups;

[0077] In this step, by weight:

[0078] Ceramic precursor 5 parts

[0079] 120 parts of water

[0080] Ammonia-containing substance 55 parts.

[0081] (2) Mix the amount of nano-ceramic particles with amino groups, acetylating agent (acetic anhydride) and catalyst (pyridine), and react at a temperature of 20°C under stirring conditions for 12 hours to obtain The modified nano-ceramic particles of the polar group are mixed with the binder (water-based epoxy resin) and solvent (water) in the formula to obtain the ceramic diap...

Embodiment 2

[0088] In this example, modified nano-ceramic particles and ceramic diaphragm slurry were prepared according to the following method:

[0089] (1) Mix the ceramic precursor (titanium tetrachloride), water, and ammonia-containing substance (N-acetylglucosamine) in the prescribed amount, and react at a temperature of 40°C under stirring conditions. The reaction time is 12h, centrifuged, Filter and dry to obtain nano-ceramic particles with amino groups;

[0090] In this step, by weight:

[0091] Ceramic precursor 1 part

[0092] 40 parts of water

[0093] Ammonia-containing substance 1 part.

[0094] (2) Mix the nano-ceramic particles with amino groups, the acetylating agent (acetyl chloride) and the catalyst (perchloric acid) in the formulation amount, and react at a temperature of 15° C. under stirring conditions for a reaction time of 14 hours to obtain The modified nano-ceramic particles containing polar groups are mixed with the binder (nitrile-polyvinyl chloride blend) ...

Embodiment 3

[0100] In this example, modified nano-ceramic particles and ceramic diaphragm slurry were prepared according to the following method:

[0101] (1) Mix the ceramic precursor (3-aminopropyltriethoxysilane APTES), water, and ammonia-containing substance (2-amino-2-deoxysugar) in the formula amount, and mix them at a temperature of 80°C under stirring conditions. Carry out the reaction, the reaction time is 4h, centrifuge, filter, and dry to obtain nano-ceramic particles with amino groups;

[0102] In this step, by weight:

[0103] Ceramic precursor 10 parts

[0104] 200 parts of water

[0105] Ammonia-containing substance 100 parts.

[0106] (2) Mix the nano-ceramic particles with amino groups, the acetylating agent (acetic anhydride) and the catalyst (sodium acetate) in the formula amount, and react at a temperature of 35° C. under stirring conditions, and the reaction time is 10 hours to obtain The modified nano-ceramic particles of the polar group are mixed with a formulat...

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Abstract

The invention provides modified nano ceramic particles, a preparation method thereof, ceramic diaphragm slurry, a preparation method thereof, a diaphragm and a lithium ion battery. The modified nano ceramic particles contain polar groups; the polar groups comprise acetyls. The preparation method of the modified nano-ceramic particles comprises the following steps of: mixing nano-ceramic particleswith amino groups, an acetylating agent and a catalyst according to a formula ratio, and performing a reaction to obtain the modified nano-ceramic particles. The ceramic diaphragm slurry provided by the invention is non-toxic and harmless to the environment; and the diaphragm prepared by using the ceramic diaphragm slurry provided by the invention can greatly improve the cycle performance and ratecapability of a battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to modified nano-ceramic particles and a preparation method thereof, a ceramic diaphragm slurry and a preparation method thereof, a diaphragm and a lithium ion battery. Background technique [0002] Various new energy batteries represented by lithium-ion batteries are currently widely used in the fields of electric vehicles and energy storage. With the increasing demand for new energy batteries in the market, how to improve production efficiency and expand production capacity under the premise of ensuring the safety and effectiveness of batteries has become an urgent issue for major new energy battery manufacturers and their upstream suppliers. . The main components of the battery include the shell, the electrolyte, the positive and negative electrodes, and the separator. Among them, the separator, which is the core component of the battery, is currently mainly coated with powder c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/626C04B35/46C04B35/14C04B26/16C04B26/14C04B26/08C04B14/30C04B14/06H01M2/16H01M10/0525C04B111/94H01M50/431H01M50/449
CPCC04B35/626C04B35/14C04B35/46C04B14/06C04B14/305C04B26/14C04B26/08C04B26/16H01M10/0525C04B2111/00844C04B2111/94H01M50/431H01M50/449C04B24/04C04B24/128C04B24/005C04B22/122Y02E60/10
Inventor 顾岚冰朱忠泗邱敏李倩伟何巍
Owner HUBEI JINQUAN NEW MATERIALS CO LTD
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