CN108847468A - A kind of lithium ion battery separator and preparation method thereof of aqueous PVDF coating - Google Patents
A kind of lithium ion battery separator and preparation method thereof of aqueous PVDF coating Download PDFInfo
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- CN108847468A CN108847468A CN201811055652.XA CN201811055652A CN108847468A CN 108847468 A CN108847468 A CN 108847468A CN 201811055652 A CN201811055652 A CN 201811055652A CN 108847468 A CN108847468 A CN 108847468A
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- pvdf
- lithium ion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of preparation method of the lithium ion battery separator of aqueous PVDF coating, preparation step is：Dispersing agent, thickener are added to the water, stirred evenly, PVDF is added, PVDF is incorporated in water, prepares suspension；Aqueous property UV resin, aqueous binders, photoinitiator, polymerization inhibitor are added in remaining water, is uniformly dispersed, then import PVDF suspension, is uniformly dispersed and prepares PVDF slurry；PVDF slurry is coated in the unilateral or bilateral of the lithium ion battery basement membrane Jing Guo sided corona treatment, dot matrix type is formed and is distributed coating, solidification both obtains finished product.Advantage is：Using water-based ultraviolet (UV) curable technology, coating can be realized to be dried immediately, and energy consumption is lower, without worrying that diaphragm leads to problem on deformation because of heat and tension.The diaphragm coated and dried time can be reduced to 8-15s, be conducive to continuous-stable large-scale production.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of lithium ion battery of aqueous PVDF coating every
Film has further related to a kind of preparation method of the lithium ion battery separator of aqueous PVDF coating.
Background technique
Lithium ion soft pack cell has that light-weight, capacity is big, internal resistance is small, flexible design, more compared to steel shell aluminum hull battery core
The advantages such as safety, are widely used in 3c consumer electronics and power battery product.But battery plus-negative plate interface does not have hard shell limit
System, when deformation generation, easily causes positive and negative anodes interface shakiness since graphite expansion is easily deformed in charge and discharge process
It is fixed, lead to deterioration of cell properties.
Currently, mainly being improved using compound painting gel coating in industry in order to improve battery plus-negative plate interface, passing through glue handle
Positive and negative anodes are firmly bonded together, and are promoted in charge and discharge process, and graphite expansion is limited.The compound painting gel coating mainly has
PVDF, acrylic glue and the fine quasi polymer of polypropylene etc..Wherein, PVDF points are oleaginous system and water-based system, oleaginous system
Mainly by solvent dissolve PVDF, be coated on basement membrane, enter back into extraction tank carry out pore-creating, this complex process, higher cost,
Not environmentally.Aqueous PVDF mainly incorporates PVDF powder in water, becomes turbid solution, then turn by techniques such as dimple version, sprayings
It moves on on substrate, this simple process, advantage of lower cost, application is wider.But the coating of dimple version preparation process is comparatively dense, holds
Easy plug ion channel.The painting layer scattering island distribution of spraying process preparation, thickness are uneven, and island size is uneven, most
It is poor that whole cohesive force plays effect.Acrylic glue and the fine polymer of polypropylene, it is big due to being swollen, strict control pattern point
Cloth, is easy to cause plug ion channel, and application is less.
Summary of the invention
The purpose of the present invention is：In view of the above deficiencies, a kind of well-regulated topographic profile of tool, good caking property are provided
Can, it is environmental-friendly, it is low in cost, convenient for a kind of lithium ion battery separator of aqueous PVDF coating of extensive consecutive production,
And preparation method thereof.
In order to achieve the above objectives, the technical solution adopted by the present invention is that：
A kind of lithium ion battery separator of aqueous PVDF coating, by lithium ion battery basement membrane and in basement membrane one or both sides
Coating composition, the coating is made of PVDF slurry, and the PVDF slurry composition and mass fraction are：
The PVDF is one of homopolymer or copolymer, and molecular weight is 500,000-80 ten thousand, and partial size is in 150nm-
300nm。
The water-borne UV-curing resin is one or more of UP resin, PUA resin or EA resin.
The aqueous binders are one or more of acrylate copolymer, polyurethanes.
The thickener is one of carboxymethyl cellulose, hydroxymethyl cellulose, bentonite or attapulgite clay or several
Kind.
The photoinitiator is benzophenone, one of carbonyls, azo-compound or organosulfur compound.
The auxiliary agent is comprising one or more in defoaming agent, levelling agent, polymerization inhibitor, dispersing agent.
The lithium ion battery basement membrane is thickness 5-25um, porosity is 36%-45% polyethylene film, polypropylene screen or
One of polypropylene, polyethylene/polypropylene composite film, polyimide film, polyvinylidene fluoride film, non-woven membrane.
A kind of preparation method of the lithium ion battery separator of aqueous PVDF coating, preparation step are：It a, will be in auxiliary agent
Dispersing agent, thickener are added in a part of water, are stirred evenly, and PVDF is slowly added to, and by kneading process, melt PVDF all
Enter in water, prepares PVDF suspension；
B, aqueous property UV resin, aqueous binders, photoinitiator, the polymerization inhibitor in auxiliary agent is added in remaining water in proportion
Agent is uniformly dispersed, then imports PVDF suspension, is uniformly dispersed and prepares PVDF slurry.
C, PVDF slurry is coated in warp using one of adagio printing, intaglio printing, silk-screen printing or letterpress
Cross the unilateral or bilateral of the lithium ion battery basement membrane of sided corona treatment, form dot matrix type and be distributed coating, solidify by UV and
8-15s is toasted at a temperature of 25-45 DEG C, solidification both obtains finished product.
The coating layer thickness is 2-6um, and coating grammes per square metre is 0.4-1.8g/m2, the dotted size of coating is 300um-1500um.
Compared with prior art, the present invention is achieved has the technical effect that：1, the lithium of PVDF prepared by the present invention coating from
Sub- battery diaphragm realizes matrix form by technique a certain in relief printing plate, flexo, silk-screen printing using water-based ultraviolet (UV) curable technology
Spot distribution, improves the distributing homogeneity of coating, thickness controllability, spot size consistency, meanwhile, the painting of uniform gap distribution
Layer does not increase the air permeability of basement membrane, contact with battery core positive and negative anodes more smooth, and cohesive force is easier to bring into play, improvement battery core positive and negative anodes
Interface；
2, using water-based ultraviolet (UV) curable technology, PVDF is powder coated on substrate, due to solidifying cross-linked effect, film-formation result
More preferably, cohesive force more preferably, improves diaphragm process capability between coating and substrate；
3, using water-based ultraviolet (UV) curable technology, coating can be realized to be dried immediately, and energy consumption is lower, does not have to worry diaphragm because of heat
Lead to problem on deformation with tension.The diaphragm coated and dried time can be reduced to 8-15s, be conducive to continuous-stable and give birth on a large scale
It produces.
Specific embodiment
Below with reference to and embodiment the invention will be further described：
Embodiment one：
The lithium ion battery separator of a kind of aqueous PVDF coating of the invention, by lithium ion battery basement membrane and in basement membrane one
The coating of side or two sides composition, the coating are made of PVDF slurry, and the PVDF slurry composition and mass fraction are：PVDF is
Polyvinylidene fluoride copolymer is 9 parts；Water-borne UV-curing resin is that UP resin is preferably 15 parts；Aqueous binders are acroleic acid polymerization
Object is preferably 4 parts；Thickener is that carboxymethyl cellulose is preferably 0.6 part；Water is 63 parts；Photoinitiator is preferably that benzophenone is excellent
It is selected as 7 parts；Auxiliary agent is 0.09 part of dispersing agent, and polymerization inhibitor is 1 part.
The wherein polyvinylidene fluoride copolymer of PVDF, molecular weight are 500,000-80 ten thousand, and partial size is in 150nm-300nm.
The polyethylene film that the lithium ion battery basement membrane is thickness 5um, porosity is 36%.
A kind of preparation method of the lithium ion battery separator of aqueous PVDF coating, preparation step are：It a, will be in auxiliary agent
Dispersing agent, carboxymethyl cellulose are added in 22 parts of water, are stirred evenly, are slowly added to polyvinylidene fluoride copolymer, and kneading is passed through
Technique incorporates polyvinylidene fluoride copolymer all in water, prepares polyvinylidene fluoride copolymer suspension；
B, UP resin, acrylate copolymer, benzophenone, the resistance in auxiliary agent is added in remaining 41 parts of water in proportion
Poly- agent, is uniformly dispersed, then imports polyvinylidene fluoride copolymer suspension, is uniformly dispersed and prepares polyvinylidene fluoride copolymer slurry；
C, PVDF polyvinylidene fluoride copolymer slurry is printed on to the list of the polyethylene film by sided corona treatment using adagio
Side or bilateral form dot matrix type and are distributed coating, solidify and toast at a temperature of 25 DEG C 8s by UV, and solidification both obtains finished product.
The coating layer thickness is 2um, and coating grammes per square metre is 0.4g/m2, the dotted size of coating is 300um.
Embodiment two：
The lithium ion battery separator of a kind of aqueous PVDF coating of the invention, by lithium ion battery basement membrane and in basement membrane one
The coating of side or two sides composition, the coating are made of PVDF slurry, and the PVDF slurry composition and mass fraction are：PVDF is
Polyvinylidene fluoride copolymer is 8 parts；Water-borne UV-curing resin is that PUA resin is preferably 17 parts；Aqueous binders are poly- for acrylic acid
Closing object is preferably 5 parts；Thickener is that hydroxymethyl cellulose is preferably 0.8 part；Water is 60 parts；Photoinitiator is preferably carbonyl compound
Object is preferably 8 parts；Auxiliary agent is 0.09 part of dispersing agent, and polymerization inhibitor is 2 parts.
The PVDF is polyvinylidene fluoride copolymer, and molecular weight is 500,000-80 ten thousand, and partial size is in 150nm-300nm.
The polypropylene screen that the lithium ion battery basement membrane is thickness 15um, porosity is 40%.
A kind of preparation method of the lithium ion battery separator of aqueous PVDF coating, preparation step are：It a, will be in auxiliary agent
Dispersing agent, hydroxymethyl cellulose are added in 30 water, are stirred evenly, and polyvinylidene fluoride copolymer is slowly added to, by mediating work
Skill incorporates polyvinylidene fluoride copolymer all in water, prepares polyvinylidene fluoride copolymer suspension；
B, PUA resin, acrylate copolymer, carbonyls, polymerization inhibitor is added in remaining 30 parts of water in proportion, point
It dissipates uniformly, then imports polyvinylidene fluoride copolymer suspension, be uniformly dispersed and prepare polyvinylidene fluoride copolymer slurry；
C, by polyvinylidene fluoride copolymer slurry using the unilateral side for being screen printed onto polypropylene screen by sided corona treatment or
Bilateral forms dot matrix type and is distributed coating, solidifies and toast at a temperature of 35 DEG C 12s by UV, and solidification both obtains finished product.
The coating layer thickness is 4um, and coating grammes per square metre is 1g/m2, the dotted size of coating is 800um.
Embodiment three：
The lithium ion battery separator of a kind of aqueous PVDF coating of the invention, by lithium ion battery basement membrane and in basement membrane one
The coating of side or two sides composition, the coating are made of PVDF slurry, and the PVDF slurry composition and mass fraction are：PVDF is
Polyvinylidene fluoride copolymer is 6 parts；Water-borne UV-curing resin is that EA resin is preferably 15 parts；Aqueous binders are acroleic acid polymerization
Object is preferably 2 parts；Thickener is that attapulgite clay is preferably 1 part；Water is 65 parts；Photoinitiator is preferably that azo-compound is preferred
It is 6 parts；Auxiliary agent is 0.09 part of dispersing agent, and polymerization inhibitor is 2.5 parts.
The polyimide film that the lithium ion battery basement membrane is thickness 25um, porosity is 45%.
A kind of preparation method of the lithium ion battery separator of aqueous PVDF coating, preparation step are：It a, will be in auxiliary agent
Dispersing agent, attapulgite clay are added in 30 parts of water, are stirred evenly, are slowly added to polyvinylidene fluoride copolymer, by mediating work
Skill incorporates polyvinylidene fluoride copolymer all in water, prepares polyvinylidene fluoride copolymer suspension；
B, EA resin, acrylate copolymer, azo-compound, the resistance in auxiliary agent is added in remaining 35 parts of water in proportion
Poly- agent, is uniformly dispersed, then imports polyvinylidene fluoride copolymer suspension, is uniformly dispersed and prepares polyvinylidene fluoride copolymer slurry；
C, polyvinylidene fluoride copolymer slurry is coated in the polyimide film Jing Guo sided corona treatment using letterpress
Unilateral or bilateral forms dot matrix type and is distributed coating, solidifies and toast at a temperature of 45 DEG C 15s by UV, solidification both at
Product.
The coating layer thickness is 6um, and coating grammes per square metre is 1.8g/m2, the dotted size of coating is 1500um.
Example IV：
It is compared with contrast groups：A. the water for weighing 83 parts is added 0.09 part of dispersing agent, 0.6 part of sodium carboxymethylcellulose, stirs
It mixes uniformly, adds 9 parts of PVDF powder, dispersion stirring, then 6 parts of acrylate, be dispersed with stirring uniformly, be prepared into PVDF slurry
Material；
B. the corona polyethylene diagrams after 12um are selected, porosity 38% is starched PVDF using dimple version printing mode
40 DEG C of oven temperature, the lithium of PVDF coating is prepared in the unilateral side of material coating and basement membrane, coating speed 15m/min after drying
Ion battery diaphragm.The lithium ion battery separator of the PVDF coating is with a thickness of 16um, coating layer thickness 4um；
The lithium ion battery separator performance of the coating of PVDF obtained by the implementation invented above and comparative example is tested, data
It see the table below one：
By one data of table it is found that 3 embodiments of the invention, three sections of diaphragms air permeability difference obtained is little, with substrate
Peel strength and positive peel strength, embodiment 2 is best, compared to micro- gravure technique of conventional formulation system, air permeability and stripping
There is stronger advantage from intensity, meanwhile, using UV curing technology, drying time is substantially reduced, energy saving.
Compared with prior art, the present invention is achieved has the technical effect that：1, the lithium of PVDF prepared by the present invention coating from
Sub- battery diaphragm realizes matrix form by technique a certain in relief printing plate, flexo, silk-screen printing using water-based ultraviolet (UV) curable technology
Spot distribution, improves the distributing homogeneity of coating, thickness controllability, spot size consistency, meanwhile, the painting of uniform gap distribution
Layer does not increase the air permeability of basement membrane, contact with battery core positive and negative anodes more smooth, and cohesive force is easier to bring into play, improvement battery core positive and negative anodes
Interface；
2, using water-based ultraviolet (UV) curable technology, PVDF is powder coated on substrate, due to solidifying cross-linked effect, film-formation result
More preferably, cohesive force more preferably, improves diaphragm process capability between coating and substrate；
3, using water-based ultraviolet (UV) curable technology, coating can be realized to be dried immediately, and energy consumption is lower, does not have to worry diaphragm because of heat
Lead to problem on deformation with tension.The diaphragm coated and dried time can be reduced to 8-15s, be conducive to continuous-stable and give birth on a large scale
It produces.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of lithium ion battery separator of aqueous PVDF coating, it is characterised in that：By lithium ion battery basement membrane and in basement membrane
The coating of one or both sides forms, and the coating is made of PVDF slurry, and the PVDF slurry composition and mass fraction are：
2. a kind of lithium ion battery separator of aqueous PVDF coating according to claim 1, it is characterised in that：The PVDF
For one of homopolymer or copolymer, molecular weight is 500,000-80 ten thousand, and partial size is in 150nm-300nm.
3. a kind of lithium ion battery separator of aqueous PVDF coating according to claim 1, it is characterised in that：It is described aqueous
UV solidified resin is one or more of UP resin, PUA resin or EA resin.
4. a kind of lithium ion battery separator of aqueous PVDF coating according to claim 1, it is characterised in that：It is described aqueous
Binder is one or more of acrylate copolymer, polyurethanes.
5. a kind of lithium ion battery separator of aqueous PVDF coating according to claim 1, it is characterised in that：The thickening
Agent is one or more of carboxymethyl cellulose, hydroxymethyl cellulose, bentonite or attapulgite clay.
6. a kind of lithium ion battery separator of aqueous PVDF coating according to claim 1, it is characterised in that：The light draws
Hair agent is benzophenone, one of carbonyls, azo-compound or organosulfur compound.
7. a kind of lithium ion battery separator of aqueous PVDF coating according to claim 1, it is characterised in that：The auxiliary agent
Comprising one or more in defoaming agent, levelling agent, polymerization inhibitor, dispersing agent.
8. a kind of lithium ion battery separator of aqueous PVDF coating according to claim 1, it is characterised in that：The lithium from
Polyethylene film, polypropylene screen or the polypropylene, polyethylene that sub- battery basement membrane is thickness 5-25um, porosity is 36%-45%/poly-
One of propylene composite membrane, polyimide film, polyvinylidene fluoride film, non-woven membrane.
9. a kind of preparation method of the lithium ion battery separator of aqueous PVDF coating, it is characterised in that：Its preparation step is：A, will
Dispersing agent, thickener in auxiliary agent are added in a part of water, are stirred evenly, are slowly added to PVDF, by kneading process, are made
PVDF all incorporates in water, prepares PVDF suspension；
B, aqueous property UV resin, aqueous binders, photoinitiator, the polymerization inhibitor in auxiliary agent is added in remaining water in proportion,
It is uniformly dispersed, then imports PVDF suspension, be uniformly dispersed and prepare PVDF slurry.
C, PVDF slurry is coated in using one of adagio printing, intaglio printing, silk-screen printing or letterpress by electricity
The unilateral or bilateral of the lithium ion battery basement membrane of dizzy processing forms dot matrix type and is distributed coating, solidifies by UV and in 25-45
8-15s is toasted at a temperature of DEG C, solidification both obtains finished product.
10. a kind of preparation method of the lithium ion battery separator of aqueous PVDF coating according to claim 9, feature exist
In：The coating layer thickness is 2-6um, and coating grammes per square metre is 0.4-1.8g/m2, the dotted size of coating is 300um-1500um.
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| CN201811055652.XA CN108847468B (en) | 2018-09-11 | 2018-09-11 | Water-based PVDF-coated lithium ion battery diaphragm and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524603A (en) * | 2018-11-26 | 2019-03-26 | 深圳市星源材质科技股份有限公司 | A kind of function diaphragm and preparation method thereof |
| CN109605967A (en) * | 2018-12-25 | 2019-04-12 | 太仓金煜电子材料有限公司 | A kind of production method of ultra-thin print film |
| CN110085790A (en) * | 2019-05-06 | 2019-08-02 | 江苏安瑞达新材料有限公司 | The preparation process of the lithium battery dotted coating diaphragm of Low ESR high-adhesion |
| CN111490213A (en) * | 2019-01-25 | 2020-08-04 | 辽源鸿图锂电隔膜科技股份有限公司 | High-safety water-based PVDF (polyvinylidene fluoride) diaphragm slurry and preparation method thereof |
| CN111509169A (en) * | 2020-01-17 | 2020-08-07 | 江苏厚生新能源科技有限公司 | High-cohesiveness integrated lithium battery diaphragm, preparation method thereof and mixed coating |
| CN112018311A (en) * | 2020-09-10 | 2020-12-01 | 青岛蓝科途膜材料有限公司 | Lithium ion battery diaphragm, preparation method and application thereof |
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| CN114512766A (en) * | 2022-02-17 | 2022-05-17 | 浙江巨圣氟化学有限公司 | Preparation method of lithium battery diaphragm by using VDF polymer aqueous coating liquid |
| CN114566755A (en) * | 2022-02-17 | 2022-05-31 | 浙江巨圣氟化学有限公司 | Preparation method of fluorine-containing polymer diaphragm for lithium battery |
| CN115477876A (en) * | 2021-06-16 | 2022-12-16 | 深圳市星源材质科技股份有限公司 | Coating slurry, coating diaphragm and preparation method of coating diaphragm |
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| CN109524603A (en) * | 2018-11-26 | 2019-03-26 | 深圳市星源材质科技股份有限公司 | A kind of function diaphragm and preparation method thereof |
| CN109605967A (en) * | 2018-12-25 | 2019-04-12 | 太仓金煜电子材料有限公司 | A kind of production method of ultra-thin print film |
| CN111490213A (en) * | 2019-01-25 | 2020-08-04 | 辽源鸿图锂电隔膜科技股份有限公司 | High-safety water-based PVDF (polyvinylidene fluoride) diaphragm slurry and preparation method thereof |
| CN110085790A (en) * | 2019-05-06 | 2019-08-02 | 江苏安瑞达新材料有限公司 | The preparation process of the lithium battery dotted coating diaphragm of Low ESR high-adhesion |
| CN112223931A (en) * | 2019-11-19 | 2021-01-15 | 江苏上达电子有限公司 | Primary curing method for printing ink |
| CN111509169A (en) * | 2020-01-17 | 2020-08-07 | 江苏厚生新能源科技有限公司 | High-cohesiveness integrated lithium battery diaphragm, preparation method thereof and mixed coating |
| CN111509169B (en) * | 2020-01-17 | 2022-06-17 | 江苏厚生新能源科技有限公司 | High-cohesiveness integrated lithium battery diaphragm, preparation method thereof and mixed coating |
| CN112018311A (en) * | 2020-09-10 | 2020-12-01 | 青岛蓝科途膜材料有限公司 | Lithium ion battery diaphragm, preparation method and application thereof |
| CN115477876A (en) * | 2021-06-16 | 2022-12-16 | 深圳市星源材质科技股份有限公司 | Coating slurry, coating diaphragm and preparation method of coating diaphragm |
| WO2022262556A1 (en) * | 2021-06-16 | 2022-12-22 | 深圳市星源材质科技股份有限公司 | Coating slurry, coating separator, separator preparation method, and battery |
| WO2022262778A1 (en) * | 2021-06-16 | 2022-12-22 | 深圳市星源材质科技股份有限公司 | Coating slurry, coated separator and preparation method therefor |
| CN114512766A (en) * | 2022-02-17 | 2022-05-17 | 浙江巨圣氟化学有限公司 | Preparation method of lithium battery diaphragm by using VDF polymer aqueous coating liquid |
| CN114566755A (en) * | 2022-02-17 | 2022-05-31 | 浙江巨圣氟化学有限公司 | Preparation method of fluorine-containing polymer diaphragm for lithium battery |
| CN114566755B (en) * | 2022-02-17 | 2023-08-18 | 浙江巨圣氟化学有限公司 | Preparation method of fluorine-containing polymer diaphragm for lithium battery |
| CN114512766B (en) * | 2022-02-17 | 2023-08-22 | 浙江巨圣氟化学有限公司 | Preparation method of lithium battery diaphragm by adopting VDF polymer water-based coating liquid |
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