A kind of preparation method of lithium-ion battery ceramic diaphragm

A lithium-ion battery, ceramic diaphragm technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of inability to truly realize industrialization, easy to block the diaphragm aperture, uneven coating thickness, etc., and meet the equipment requirements. , The effect of reducing process difficulty and narrow pore size distribution

Active Publication Date: 2020-12-04
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of chemical vapor deposition to form a silica coating on the surface of the diaphragm and the use of evaporation induction to prepare a silica coating on the surface of a non-woven diaphragm have achieved good results, but the process is complicated and the equipment is expensive. Cannot be truly industrialized
Some researchers also use nitrogen methyl pyrrolidone as a solvent and polyvinylidene fluoride as a binder to synthesize a slurry first, and then directly coat it on the diaphragm. This method is simple, but the ambient humidity needs to be controlled during slurry mixing and coating, and Simple roller coating, extrusion coating or spin coating will lead to uneven coating thickness and easy to block the original pore size of the diaphragm

Method used

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  • A kind of preparation method of lithium-ion battery ceramic diaphragm
  • A kind of preparation method of lithium-ion battery ceramic diaphragm
  • A kind of preparation method of lithium-ion battery ceramic diaphragm

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Embodiment 1

[0033] A method for preparing a lithium-ion battery ceramic diaphragm, the method specifically comprising: preparing a water-based ceramic slurry and atomizing the water-based ceramic slurry into an aerosol, specifically suspending solid particles and liquid particles in the water-based ceramic slurry in the air After the smoke and mist are formed, they are uniformly deposited on the base film to form a ceramic coating precursor, and then the ceramic coating precursor is dried to obtain the product;

[0034] Wherein, the water-based ceramic slurry comprises by weight: 0.3 part of inorganic ceramic powder, 0.6 part of deionized water, 0.05 part of styrene-butadiene rubber emulsion, and 0.05 part of sodium carboxymethyl cellulose;

[0035] The inorganic ceramic is zirconia;

[0036] The particle diameter of described inorganic ceramic powder is 100nm;

[0037] The preparation method of described water-based ceramic slurry comprises the steps:

[0038] S1, adding sodium carboxy...

Embodiment 2

[0057] A method for preparing a lithium-ion battery ceramic diaphragm, the method specifically comprising: preparing a water-based ceramic slurry and atomizing the water-based ceramic slurry into an aerosol, specifically suspending solid particles and liquid particles in the water-based ceramic slurry in the air After the smoke and mist are formed, they are uniformly deposited on the base film to form a ceramic coating precursor, and then the ceramic coating precursor is dried to obtain the product;

[0058] Wherein, the water-based ceramic slurry comprises by weight: 0.15 part of inorganic ceramic powder, 0.8 part of deionized water, 0.03 part of styrene-butadiene rubber emulsion, and 0.02 part of sodium carboxymethyl cellulose;

[0059]The inorganic ceramic is silicon dioxide;

[0060] The particle size of the inorganic ceramic powder is 300nm;

[0061] The preparation method of described water-based ceramic slurry comprises the steps:

[0062] S1, adding sodium carboxymet...

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Abstract

The present invention disclose a method of preparing a lithium -ion battery ceramic diaphragm. The method includes the preparation of water -based ceramic slurry and the fabrication of water -based ceramic slurry into gas -soluble.After the particles are suspended in the air and the fog, it is uniformly deposited to the base membrane to form a ceramic coating front -wheel drive, and then the ceramic coating front drive is dry and processed to obtain the product.The ceramic slurry of the present invention is a water -based system. When the slurry and atomization attachment, the environmental humidity is not high, the process operation is simple, the equipment is not high, the environment is friendly, and it is easy to realize industrialization.The obtained product ceramic coating is thin and uniform. The hole of the ceramic coating is evenly distributed and the pore diameter is narrow, which is conducive to improving the energy density of the battery, reducing the internal resistance of the battery, and improving the conductivity of the battery.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery materials, and in particular relates to a preparation method of a lithium-ion battery ceramic diaphragm, in particular to the preparation of water-based ceramic slurry and the application of the preparation technology in which the ceramic slurry is atomized into an aerosol and deposited on a base film. Background technique [0002] In a modern society where oil resources are increasingly scarce and environmental pollution is serious, it is particularly important to develop hybrid electric vehicles and pure electric vehicles. Lithium-ion batteries are the preferred energy source for hybrid electric vehicles and pure electric vehicles. In order to provide high power, usually a battery needs to be connected in series or parallel with dozens or even hundreds of single cells. Therefore, battery safety is the key performance of power batteries. As the main component of the battery that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16C04B35/10C04B35/14C04B35/48C04B35/622H01M50/403H01M50/434
CPCC04B35/10C04B35/14C04B35/48C04B35/62218H01M50/431H01M50/403H01M50/449Y02E60/10
Inventor 何学刚李道聪杨茂萍陈龙
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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