Coating composite for lithium ion battery separator and foam gluing method

A coating composition, lithium ion technology, applied to battery components, coatings, circuits, etc., can solve the problem of uneven pore size distribution of battery separators, improve service life and performance, good adhesion, and not easy to fall off Effect

Active Publication Date: 2010-07-28
CHINA HAISUM ENG
View PDF2 Cites 40 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to overcome the defect of the uneven distribution of the pore size of the battery diaphragm obtained in the manufacturing method of the lithium-ion battery diap

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coating composite for lithium ion battery separator and foam gluing method
  • Coating composite for lithium ion battery separator and foam gluing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A coating composition for a lithium-ion power battery diaphragm, consisting of the following components in parts by weight:

[0038] Acrylate emulsion 30 parts;

[0039] 30 parts of alumina powder;

[0040] Foaming agent (sodium lauryl sulfate) 2 parts;

[0041] 3 parts of foam stabilizer (lauryl alcohol);

[0042] 35 parts of water.

[0043] Step 1. Mix acrylate emulsion, alumina powder, sodium lauryl sulfate, lauryl alcohol and 3 parts by weight of alkali-thickening acrylate emulsion in proportion, and adjust the viscosity to 2000mPa·s;

[0044] Step 2. Foaming the above suspension and adjusting the foam density to about 250 g / L. Use the foam applicator to evenly coat the foam on the porous flexible substrate;

[0045] Step 3. Dry the foam coating coated on the porous flexible substrate at a temperature of 90°C for 3 minutes, so that the moisture content reaches about 10%. After rolling at 45N / cm, bake at 130°C Bake for 1 min, and wind up to obtain a lithium-ion...

Embodiment 2

[0048] A coating composition for a lithium-ion power battery diaphragm, consisting of the following components in parts by weight:

[0049] Acrylate emulsion 50 parts;

[0050] 10 parts of alumina powder;

[0051] 0.5 parts of blowing agent (sodium lauryl sulfate);

[0052] 1 part of foam stabilizer (dodecyl alcohol);

[0053] 38.5 parts of water.

[0054] Step 1. Mix acrylate emulsion, alumina powder, sodium lauryl sulfate, lauryl alcohol and 1 part by weight of alkali-thickening acrylate emulsion in proportion, and adjust the viscosity to 3000mPa·s;

[0055] Step 2. Foaming the above suspension and adjusting the foam density to about 200 g / L. Use the foam applicator to evenly coat the foam on the porous flexible substrate;

[0056] Step 3. Dry the foam coating coated on the porous flexible substrate at a temperature of 120°C for 1 minute to make the moisture content reach about 10%. After rolling at 294N / cm, bake it at 160°C Bake for 3 minutes, and wind up to obtain a ...

Embodiment 3

[0059] A coating composition for a lithium-ion power battery diaphragm, consisting of the following components in parts by weight:

[0060] 40 parts of acrylate emulsion;

[0061] 20 parts of alumina powder;

[0062] 1.5 parts of foaming agent (sodium lauryl sulfate);

[0063] 2 parts of foam stabilizer (dodecyl alcohol);

[0064] 36.5 parts of water.

[0065] Step 1. Mix acrylate emulsion, alumina powder, sodium lauryl sulfate, lauryl alcohol and 2 parts by weight of alkali-thickening acrylate emulsion in proportion, and adjust the viscosity of the coating composition to 2500mPa·s;

[0066] Step 2. Foaming the above suspension and adjusting the foam density to about 210 g / L. Use the foam applicator to evenly coat the foam on the porous flexible substrate;

[0067] Step 3. Dry the foam coating coated on the porous flexible substrate at a temperature of 110°C for 3 minutes, so that the moisture content reaches about 10%. After rolling at 150N / cm, bake at 150°C Bake for 2 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a coating composite for a lithium ion battery separator, wherein the coating composite contains porous electro-insulated oxide particles, binding agent, foaming agent or foam stabilizing agent. The invention further relates to a foam gluing method for the lithium ion battery separator, comprising the steps: mechanically foaming and the coating suspension on the surface of a porous flexible substrate, drying, curing and roll compacting to form a film with micro pores, wherein the suspension contains the coating composite according to the invention. Adopting the coating composition according to the invention and the lithium ion battery separator prepared therefrom can achieve the purpose of small pore diameter, even pore distribution and ensuring the charging and discharging uniformity of lithium ion.

Description

technical field [0001] The invention relates to a coating composition for a lithium-ion battery diaphragm, and also relates to a foam sizing method for the lithium-ion battery diaphragm using the coating composition. Background technique [0002] Since Sony successfully commercialized lithium-ion batteries in 1991, lithium-ion batteries have become the main power source for mobile phones, notebook computers and digital electronic products. In recent years, new energy battery technology has developed rapidly. Compared with traditional secondary batteries such as lead-acid batteries and nickel-metal hydride batteries, power lithium-ion batteries have high energy density and power density, no memory effect, small self-discharge and cycle Features such as long life have become the development direction of vehicle power batteries. [0003] Lithium-ion power battery separator is an important component material of lithium-ion batteries. It is usually a thin porous insulating mater...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M2/16C09D127/16C09D127/18C09D133/02C09D133/20C09D127/20C09D123/28C09D133/00C09D7/12H01M50/431
CPCY02E60/12Y02E60/10
Inventor 吴立群刘攀贺磊
Owner CHINA HAISUM ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap