CN110724415A - Composition, preparation method and application of composition in battery diaphragm coating material - Google Patents
Composition, preparation method and application of composition in battery diaphragm coating material Download PDFInfo
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- CN110724415A CN110724415A CN201910822780.0A CN201910822780A CN110724415A CN 110724415 A CN110724415 A CN 110724415A CN 201910822780 A CN201910822780 A CN 201910822780A CN 110724415 A CN110724415 A CN 110724415A
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- composition
- copolymer
- diaphragm
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- vinylidene fluoride
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/16—Homopolymers or copolymers of vinylidene fluoride
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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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
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
-
- 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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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- 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 belongs to the technical field of battery preparation, and particularly relates to a composition, a preparation method and application of the composition in a battery diaphragm coating material. The present invention provides a composition comprising: vinylidene fluoride copolymer, organic solvent and ceramic particles. The invention also provides a preparation method of the composition, and application of the composition or a product obtained by the preparation method in a battery diaphragm coating material. In the invention, the PVDF copolymer is fully dissolved in an organic solvent, prepared into slurry, coated on a diaphragm to form a sheet shape, has a larger contact area with a pole piece when applied to a battery, and can generate good bonding performance through a hot-pressing formation step; after detection, the product prepared by the technical scheme provided by the invention has better air permeability of the diaphragm and better adhesive property between the diaphragm and the pole piece than similar commercially available diaphragms after coating; the technical defects of poor bonding performance and poor air permeability of the coated diaphragm in the prior art are overcome.
Description
Technical Field
The invention belongs to the technical field of battery preparation, and particularly relates to a composition, a preparation method and application of the composition in a battery diaphragm coating material.
Background
The diaphragm is a thin film used for separating the positive pole and the negative pole during the electrolytic reaction so as to prevent the direct reaction in the electrolytic cell from losing energy. In the structure of the lithium battery, a diaphragm is one of key inner layer components; the performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, directly influences the capacity, circulation, safety performance and other characteristics of the battery, and the diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery.
In the prior art, when the surface of a diaphragm is coated, and the diaphragm and a pole piece of a battery are tightly adhered and fixed, a polyvinylidene fluoride (PVDF) water system mixture is generally used as coating slurry, PVDF in the coating slurry is not dissolved and is suspended in the slurry in a granular form, and the granular PVDF after coating and drying is distributed on the surface of a base film, so that the contact surface area of the PVDF and the pole piece is small when the PVDF water-based coating slurry is applied to the battery, and the generated adhesion performance is not ideal. And substances such as pore-forming agents, thickening agents and the like are required to be added when the slurry is prepared, and the air permeability and the bonding performance of the diaphragm are influenced to a certain extent after the slurry is coated.
Therefore, the development of a composition, a preparation method and an application thereof in a battery separator coating material for solving the technical defects of poor adhesion and poor air permeability after the separator coating in the prior art becomes a problem to be solved by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a composition, a preparation method and an application thereof in a battery diaphragm coating material, which are used for solving the technical defects of poor adhesion performance and poor air permeability after a diaphragm is coated in the prior art.
The invention provides a composition, which comprises the following raw materials: vinylidene fluoride copolymer, organic solvent and ceramic particles;
the vinylidene fluoride copolymer is selected from: one or more of vinylidene fluoride-trifluoroethylene copolymer, vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-hexafluoroethylene copolymer and vinylidene fluoride-hexafluoropropylene copolymer.
Preferably, the raw materials of the composition comprise, by mass: 2-8 parts of vinylidene fluoride copolymer, 70-98 parts of organic solvent and 0-25 parts of ceramic particles.
Preferably, the organic solvent is selected from: any one or more of acetone, DMAC, NMP, and DMF.
Preferably, the molecular weight of the vinylidene fluoride copolymer is 500000-1000000 g/mol, and the melting point of the vinylidene fluoride copolymer is more than 130 ℃.
Preferably, the ceramic particles have a particle size of 0.5 to 1.2 μm.
The invention also provides a preparation method of the composition, which comprises the following steps:
mixing a vinylidene fluoride copolymer with an organic solvent, and stirring for the first time to obtain a first product;
and step two, mixing the first product with the ceramic, and stirring for the second time to obtain the product.
Preferably, the rotating speed of the first stirring is 1000-4000 r/min, the time of the first stirring is 30-300 min, and the temperature of the first stirring is 20-80 ℃.
Preferably, the rotating speed of the second stirring is 2000-8000 r/min, the time of the second stirring is 30-300 min, and the temperature of the second stirring is 20-100 ℃.
Preferably, in the product, the thickness of the ceramic particles and the polyvinylidene fluoride coating is 0.5-6 μm; the thickness of the product is 5-50 μm.
The invention also provides application of the composition or the product obtained by the preparation method in coating materials of the battery separator.
In summary, the present invention provides a composition, which comprises the following raw materials: vinylidene fluoride copolymer, organic solvent and ceramic particles; the vinylidene fluoride copolymer is selected from: one or more of vinylidene fluoride-trifluoroethylene copolymer, vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-hexafluoroethylene copolymer and vinylidene fluoride-hexafluoropropylene copolymer. The invention also provides a preparation method of the composition, and application of the composition or a product obtained by the preparation method in a battery diaphragm coating material. In the technical scheme provided by the invention, the PVDF copolymer is fully dissolved in an organic solvent, prepared into slurry, coated on the diaphragm to form adjacent sheets, and applied to a battery, the PVDF copolymer has a larger contact area with a pole piece, and the battery can generate good bonding performance through a hot-pressing formation step; further, after detection, the air permeability of the diaphragm and the bonding performance of the diaphragm and a pole piece of the product prepared by the technical scheme provided by the invention are superior to those of the similar commercially available diaphragms after coating; the technical defects of poor adhesive property and poor air permeability after the diaphragm is coated in the prior art are overcome.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of the microstructure of a product prepared by the technical scheme provided by the invention after being coated on a diaphragm;
FIG. 2 is a schematic view of the microstructure of a prior art membrane coated with water-based PVDF;
among them, ceramic particles 1, an oil-based PVDF coating layer 2, and a water-based PVDF coating slurry 3.
Detailed Description
The invention provides a composition, a preparation method and application thereof in a battery diaphragm coating material, which are used for solving the technical defects of poor bonding performance and air permeability after the diaphragm is coated in the prior art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to illustrate the present invention in more detail, a composition, a preparation method and an application thereof in a battery separator coating material provided by the present invention are specifically described below with reference to examples.
Example 1
This example is a specific example of the preparation of product 1-oil based PVDF coating slurry.
3g of PVDF copolymer 1 is dissolved in 97g of acetone, and the mixture is stirred for 240min at the temperature of 50 ℃ and the rotating speed of 1300r/min, so that the PVDF copolymer is fully dissolved to obtain a first product 1; in this example, the PVDF copolymer 1 is a vinylidene fluoride-trifluoroethylene copolymer, the molecular weight of which is 500000g/mol, and the melting point of which is greater than 130 ℃.
Mixing the first product 1 with 3g of ceramic particles with the particle size of 0.8 mu m, and placing the mixture in a ball mill for high-speed stirring and dispersion to enable the first product 1 to uniformly cover the surfaces of the ceramic particles to obtain a product 1; in this example, the temperature for high speed stirring and dispersion in the ball mill was 30 ℃, the rotation speed was 2500r/min, and the time was 120 min.
In product 1, the thickness of the PVDF copolymer 1 layer was 2 μm, and the thickness of product 1 was 11 μm.
Example 2
This example is a specific example of the preparation of product 2-oil based PVDF coating slurry.
5g of PVDF copolymer 2 is dissolved in 95g of DMAC, and the mixture is stirred for 90min at the temperature of 25 ℃ and the rotating speed of 1000r/min, so that the PVDF copolymer is fully dissolved to obtain a first product 2; in this example, PVDF copolymer 2 is a vinylidene fluoride-tetrafluoroethylene copolymer having a molecular weight of 600000g/mol and a melting point of greater than 130 ℃.
Mixing the first product 2 with 2.5g of ceramic particles with the particle size of 0.7 mu m, and placing the mixture in a ball mill for high-speed stirring and dispersion to enable the first product 2 to uniformly cover the surfaces of the ceramic particles to obtain a product 2; in the embodiment, the temperature for high-speed stirring and dispersing in the ball mill is 70 ℃, the rotating speed is 3000r/min, and the time is 180 min.
In product 2, the thickness of the PVDF copolymer 2 layer was 1.7. mu.m, and the thickness of product 2 was 10.7. mu.m.
Example 3
This example is a specific example of the preparation of product 3-oil based PVDF coating slurry.
Dissolving 7g of PVDF copolymer 3 in 93g of NMP, stirring for 60min at 80 ℃ and at the rotating speed of 4000r/min to fully dissolve the PVDF copolymer to obtain a first product 3; in this example, the PVDF copolymer 3 is a vinylidene fluoride-hexafluoroethylene copolymer having a molecular weight of 800000g/mol and a melting point of more than 130 ℃.
Mixing the first product 3 with 0g of ceramic particles to obtain a product 3;
in product 3, the thickness of the PVDF copolymer 3 layer was 1 μm, and the thickness of product 3 was 10 μm.
Example 4
This example is a specific example of the preparation of product 4-oil based PVDF coating slurry.
2g of PVDF copolymer 4 is dissolved in 98g of DMF, and the mixture is stirred for 70min at the temperature of 40 ℃ and the rotating speed of 3000r/min, so that the PVDF copolymer is fully dissolved to obtain a first product 4; in this example, the PVDF copolymer 4 is a vinylidene fluoride-hexafluoropropylene copolymer with a molecular weight of 1000000g/mol and a melting point of greater than 130 ℃.
Mixing the first product 4 with 6g of ceramic particles with the particle size of 1 mu m, and placing the mixture in a ball mill for high-speed stirring and dispersion to enable the first product 4 to uniformly cover the surfaces of the ceramic particles to obtain a product 4; in this example, the temperature for high speed stirring and dispersion in the ball mill was 100 ℃, the rotation speed was 8000r/min, and the time was 300 min.
In product 4, the thickness of the PVDF copolymer 4 layer was 3 μm, and the thickness of product 4 was 12 μm.
Example 5
The present example is a specific example of measuring the adhesive properties of the separators 1 to 4 obtained by coating the products 1 to 4 obtained in examples 1 to 4 on the surfaces of the separators, respectively.
And respectively coating the products 1-4 on the surface of the diaphragm in a spraying/printing mode to obtain the diaphragms 1-4.
Referring to fig. 1, fig. 1 is a schematic view of a microstructure of a diaphragm 1-4, and it can be seen from fig. 1 that the oil-based PVDF coating slurry can uniformly cover the surface of the diaphragm in a sheet-like and adjacent manner, which can effectively increase the contact surface area and ensure excellent air permeability. Referring to fig. 2, fig. 2 is a schematic view of the microstructure of the separator in the prior art, and it can be seen from fig. 2 that the contact area of the aqueous PVDF with the electrode plate is not ideal when applied in a battery because the aqueous PVDF is in a granular state after coating.
Therefore, after the coated diaphragm 1-4 is applied to a battery, good bonding performance can be generated through the hot pressing and forming step, and the diaphragm can be well bonded with a pole piece.
Example 6
This example is a specific example for measuring the air permeability of the separators 1 to 4 obtained in example 5. In this example, the control used was a water-based PVDF-coated separator.
After the oil PVDF is used for coating, the adhesive property and the air permeability of the diaphragm are improved. The data of the specific experimental results can be seen in table 1.
In this embodiment, the air permeability test refers to that the passing area of 100mL of air is 6.45cm under the conditions of temperature, humidity and normal pressure and 1.21kPa applied by a test instrument2The time required for the septum. This example was tested directly by a gas permeation tester.
In this embodiment, the peel strength is the maximum force required to peel the materials together from the contact surface per unit width, and reflects the adhesive strength of the materials. When the peel strength is contrastingly tested, a material to be tested with a fixed size is selected, a special adhesive tape is used for flatly adhering the material to be tested, and the force of the adhesive tape for peeling the coating material from the base material is tested by a tensile machine, so that the peel strength is obtained.
TABLE 1
| Diaphragm 1 | Diaphragm 2 | |
Diaphragm 4 | Reference substance | |
| Air permeability s/100CC | 204 | 211 | 220 | 195 | 235 |
| Peel strength N/m | 83 | 85 | 88 | 79 | 78 |
| Adhesive strength N/m of anode | 34 | 36 | 37 | 33 | 18 |
As can be seen from the above embodiments, the technical solution provided by the present invention has the following advantages:
(1) in the composition provided by the invention, the PVDF copolymer and the organic solvent are mixed to prepare the coating slurry, the surface area is increased by coating the PVDF in a sheet shape, so that the bonding performance can be fully exerted, and the bonding strength between the diaphragm and the pole piece is effectively improved;
(2) and the oily PVDF slurry does not need to be added with various auxiliary agents such as pore-forming agents, thickening agents and the like, and is simple in preparation and convenient to operate.
(3) According to experimental detection, compared with a reference substance, after the product prepared by the invention is coated on the diaphragm, the influence on the air permeability of the diaphragm is small, the caking property is obviously improved, and the comprehensive performance of the product can be effectively improved when the product is applied to a battery.
In summary, the present invention provides a composition, which comprises the following raw materials: vinylidene fluoride copolymer, organic solvent and ceramic particles; the vinylidene fluoride copolymer is selected from: one or more of vinylidene fluoride-trifluoroethylene copolymer, vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-hexafluoroethylene copolymer and vinylidene fluoride-hexafluoropropylene copolymer. The invention also provides a preparation method of the composition, and application of the composition or a product obtained by the preparation method in a battery diaphragm coating material. In the technical scheme provided by the invention, the PVDF copolymer is fully dissolved in an organic solvent, prepared into slurry, coated on the diaphragm to form adjacent sheets, and applied to a battery, the PVDF copolymer has a larger contact area with a pole piece, and the battery can generate good bonding performance through a hot-pressing formation step; further, after detection, the product prepared by the technical scheme provided by the invention has better air permeability of the diaphragm and better adhesive property of the diaphragm and the pole piece than the similar commercially available diaphragm after coating, and can effectively improve the overall performance of the battery. The composition, the preparation method and the application of the composition in the battery diaphragm coating material solve the technical defects of poor adhesion performance and poor air permeability after the diaphragm is coated in the prior art.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A composition characterized in that the raw materials of said composition comprise: vinylidene fluoride copolymer, organic solvent and ceramic particles;
the vinylidene fluoride copolymer is selected from: one or more of vinylidene fluoride-trifluoroethylene copolymer, vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-hexafluoroethylene copolymer and vinylidene fluoride-hexafluoropropylene copolymer.
2. The composition according to claim 1, wherein the composition comprises the following raw materials in parts by mass: 2-8 parts of vinylidene fluoride copolymer, 70-98 parts of organic solvent and 0-25 parts of ceramic particles.
3. The composition according to claim 1, wherein the organic solvent is selected from the group consisting of: any one or more of acetone, DMAC, NMP, and DMF.
4. The composition of claim 1, wherein the molecular weight of the vinylidene fluoride copolymer is 500000-1000000 g/mol, and the melting point of the vinylidene fluoride copolymer is greater than 130 ℃.
5. The composition according to claim 1, wherein the ceramic particles have a particle size of 0.5 to 1.2 μm.
6. A process for the preparation of a composition comprising any one of claims 1 to 5, wherein the process comprises:
mixing a vinylidene fluoride copolymer with an organic solvent, and stirring for the first time to obtain a first product;
and step two, mixing the first product with the ceramic, and stirring for the second time to obtain the product.
7. The preparation method according to claim 6, wherein the rotation speed of the first stirring is 1000-4000 r/min, the time of the first stirring is 30-300 min, and the temperature of the first stirring is 20-80 ℃.
8. The preparation method according to claim 6, wherein the rotation speed of the second stirring is 2000-8000 r/min, the time of the second stirring is 30-300 min, and the temperature of the second stirring is 20-100 ℃.
9. The preparation method of claim 6, wherein the thickness of the coating of the ceramic particles and the vinylidene fluoride copolymer in the product is 0.5-6 μm; the thickness of the product is 5-50 μm.
10. Use of a composition according to any one of claims 1 to 5 or a product obtained by the preparation method according to any one of claims 6 to 9 in a battery separator coating material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471164A (en) * | 2020-05-16 | 2020-07-31 | 深圳市劢全新材料科技有限责任公司 | Aromatic polyester, preparation method thereof and diaphragm material containing aromatic polyester |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105061791A (en) * | 2015-07-10 | 2015-11-18 | 长兴东方红包装有限公司 | Battery diaphragm taking polyethylene-compounded natural cellulose membrane as base material and preparation method of battery diaphragm |
| CN105733332A (en) * | 2016-03-01 | 2016-07-06 | 天津市捷威动力工业有限公司 | Flame-retardant coating and lithium ion battery employing same |
| CN107528038A (en) * | 2017-08-30 | 2017-12-29 | 江苏清陶能源科技有限公司 | Prepare the mixed slurry of composite diaphragm and the preparation method of composite diaphragm |
| CN109192910A (en) * | 2018-09-11 | 2019-01-11 | 江苏清陶能源科技有限公司 | A kind of oiliness coating and nano ceramic fibers composite diaphragm and preparation method thereof |
| KR102017568B1 (en) * | 2018-12-26 | 2019-09-06 | 명성티엔에스 주식회사 | Separator for secondary battery, method for manufacturing the same, and secondary battery including the same |
| CN111732858A (en) * | 2019-03-19 | 2020-10-02 | 河北金力新能源科技股份有限公司 | Oil-based PVDF spraying slurry, diaphragm coated with oil-based PVDF spraying slurry, and preparation method and application of diaphragm |
-
2019
- 2019-09-02 CN CN201910822780.0A patent/CN110724415A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105061791A (en) * | 2015-07-10 | 2015-11-18 | 长兴东方红包装有限公司 | Battery diaphragm taking polyethylene-compounded natural cellulose membrane as base material and preparation method of battery diaphragm |
| CN105733332A (en) * | 2016-03-01 | 2016-07-06 | 天津市捷威动力工业有限公司 | Flame-retardant coating and lithium ion battery employing same |
| CN107528038A (en) * | 2017-08-30 | 2017-12-29 | 江苏清陶能源科技有限公司 | Prepare the mixed slurry of composite diaphragm and the preparation method of composite diaphragm |
| CN109192910A (en) * | 2018-09-11 | 2019-01-11 | 江苏清陶能源科技有限公司 | A kind of oiliness coating and nano ceramic fibers composite diaphragm and preparation method thereof |
| KR102017568B1 (en) * | 2018-12-26 | 2019-09-06 | 명성티엔에스 주식회사 | Separator for secondary battery, method for manufacturing the same, and secondary battery including the same |
| CN111732858A (en) * | 2019-03-19 | 2020-10-02 | 河北金力新能源科技股份有限公司 | Oil-based PVDF spraying slurry, diaphragm coated with oil-based PVDF spraying slurry, and preparation method and application of diaphragm |
Non-Patent Citations (2)
| Title |
|---|
| 中国大百科全书出版社编辑部: "《中国大百科全书 化学1》", 28 February 1989, 中国大百科全书出版社 * |
| 魏保志等: "《新旧动能转换新引擎 新材料产业专利导航》", 30 November 2018, 知识产权出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471164A (en) * | 2020-05-16 | 2020-07-31 | 深圳市劢全新材料科技有限责任公司 | Aromatic polyester, preparation method thereof and diaphragm material containing aromatic polyester |
| CN111471164B (en) * | 2020-05-16 | 2022-10-04 | 刘桥 | Aromatic polyester, preparation method thereof and diaphragm material containing aromatic polyester |
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Application publication date: 20200124 |