CN108336277A - A kind of diaphragm and preparation method thereof with ceramic coating - Google Patents
A kind of diaphragm and preparation method thereof with ceramic coating Download PDFInfo
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- CN108336277A CN108336277A CN201711484940.2A CN201711484940A CN108336277A CN 108336277 A CN108336277 A CN 108336277A CN 201711484940 A CN201711484940 A CN 201711484940A CN 108336277 A CN108336277 A CN 108336277A
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- diaphragm
- binder
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- ceramic
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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
-
- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
- H01M50/434—Ceramics
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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
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- 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
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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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
This application discloses a kind of diaphragm and preparation method thereof with ceramic coating.The application has a diaphragm of ceramic coating, including basement membrane and the ceramic coating coated at least one surface of basement membrane, and ceramic coating is aluminum oxide coating layer, and in aluminum oxide coating layer, the specific surface area of alumina powder is less than 8m2/ g, used binder are the binder with cross-linked structure, and the moisture of diaphragm reaches 500ppm or less.The diaphragm of the application, creative use specific surface area are less than 8m2/ g alumina powders and binder with cross-linked structure prepare to form aluminum oxide coating layer, so that the moisture of diaphragm reaches 500ppm or less, it reduces due to diaphragm moisture height and to be endangered caused by the production and use of battery and security risk, the safety for improving battery production and using.Also, since moisture is low, the amount that moisture generates the pernicious gases such as HF is reduced, influences of the HF to battery performance and service life is reduced.
Description
Technical field
This application involves lithium ion battery separator fields, more particularly to a kind of diaphragm and its system with ceramic coating
Preparation Method.
Background technology
Lithium ion battery have larger energy density, large current discharging capability is strong, rated voltage is high, has extended cycle life
The advantages that, cycle life can reach 3000~5000 times under shallow charge and discharge pattern.In digital product, electric bicycle, electronic
Multiple industries such as motor, electric vehicle, power energy storage, communication energy storage and field are used widely.
With the extension in lithium ion battery applications field, the requirement to battery security is higher and higher；To improve battery
Safety, while wellability of the diaphragm to electrolyte is improved, coat heat safe inorganic or organic grain on polyalkene diaphragm surface
The coating diaphragm of son receives more and more attention.In inorganic particulate coats diaphragm, with aluminium oxide Al2O3For the ceramics of coating
Coated separator is widely approved and is applied.
In the manufacturing process of lithium ion battery, water must be strictly controlled, and excessive moisture can cause battery sternly
The influence and harm of weight：Water is easy to react with lithium salts in electrolyte, generates the gases such as HF, causes battery bulge or fried
It splits；Simultaneously as consuming the active ingredient in electrolyte, lithium ion is lost, the energy of battery just consequently reduces；
In addition, due to HF acid extremely strong acidity and corrosivity, the metal parts of inside battery can be caused to corrode, further result in battery
Leakage；And HF can destroy SEI films, further result in the deterioration of battery performance.
However, containing aluminium oxide Al2O3Ceramic-coated separator in, due to Al2O3Particle and its tiny, and surface
Polar group is generally carried, there is certain hydrophily, therefore Al2O3The water content of coated separator is all than polyalkene diaphragm
Height, existing paint-on technique are difficult the preparation process removing moisture in coating film so that Al2O3The moisture of ceramic-coated separator is very
It is difficult to control in 1000ppm hereinafter, excessive moisture makes all there is certain risk during battery production and use.
Invention content
The purpose of the application is to provide a kind of new diaphragm and preparation method thereof with ceramic coating.
To achieve the goals above, the application uses following technical scheme：
The one side of the application discloses a kind of diaphragm with ceramic coating, including basement membrane and coated in basement membrane at least
The ceramic coating on one surface, wherein ceramic coating is aluminum oxide coating layer, in aluminum oxide coating layer, the specific surface of alumina powder
Product is less than 8m2/ g, used binder are the binder with cross-linked structure, the moisture of diaphragm reach 500ppm with
Under.
It should be noted that the diaphragm of the application, compared with existing ceramic-coated separator, crucial difference technology point
It is, creative use specific surface area is less than 8m2/ g alumina powders and binder with cross-linked structure to be formed to prepare
Aluminum oxide coating layer so that the moisture of prepared diaphragm reaches 500ppm hereinafter, being greatly reduced Al2O3Ceramic coating
Moisture in diaphragm reduces moisture and seriously affects and endanger caused by battery production and use, improve battery production and
The safety used.
Preferably, the grain size of alumina powder is 0.01 μm≤D50≤10 μm.
It is furthermore preferred that the grain size of alumina powder is 0.03 μm≤D50≤3 μm.
Preferably, the binder with cross-linked structure is by that can crosslink the one-component substance or two-component object of reaction
Matter forms；Wherein, one-component substance in polystyrenebutadienes copolymer, polyacrylonitrile and polyacrylamide at least
It is a kind of；In two-component substance, first group is divided into polyacrylic acid or derivatives thereof, polyacrylate or derivatives thereof at least
It is a kind of；Second group is divided into spreading out for ethylene oxide or its polymer, propylene oxide or its polymer, propylene oxide or its polymer
At least one of biology, hydroxyethyl cellulose, polyvinyl alcohol.
Preferably, the thickness of aluminum oxide coating layer is 0.5-10 μm.
Preferably, basement membrane is polyethene microporous membrane, microporous polypropylene membrane, or by polyethene microporous membrane and polypropylene microporous
The MULTILAYER COMPOSITE microporous barrier of film composition.
It is furthermore preferred that the thickness of basement membrane is 5-20 μm, porosity ranges 30%-60%, pore diameter range 0.005-
0.15μm。
The another side of the application discloses a kind of lithium ion battery of the diaphragm using the application.
It is appreciated that the application has a diaphragm of ceramic coating, moisture reaches 500ppm hereinafter, therefore, made
In standby lithium ion battery, the generation of the gases such as HF is substantially reduced, reduces the performance damage of the lithium ion battery thereby resulted in
It becomes estranged security risk.
The preparation method of the diaphragm for disclosing the application on one side again of the application, including 8m is less than using specific surface area2/g
Alumina powder, and the binder with cross-linked structure prepares ceramic slurry, and ceramic slurry is coated at least the one of basement membrane
A surface obtains moisture and reaches the 500ppm diaphragms below with ceramic coating after drying process.
It is appreciated that the application's it is critical that creative use specific surface area less than 8m2/ g alumina powders and
Binder with cross-linked structure to form aluminum oxide coating layer to prepare, and therefore, other components in ceramic slurry can refer to existing
Slurry used by some ceramic-coated separators.But in order to reach better effect, to pottery in the preferred scheme of the application
Other components of porcelain slurry are defined, detailed following technical solution.
Preferably, include alumina powder, binder, dispersant, thickener and surfactant in ceramic slurry；Its
In, the content of binder is the 0.5-10% of total weight, and the content of dispersant is the 0-2% of total weight, and the content of thickener is
The 0-5% of total weight, the content of surfactant are the 0.05-3% of total weight, and surplus is solvent.Preferably, solvent is to go
Ionized water.
Preferably, dispersant is at least one of Sodium Polyacrylate, ammonium polyacrylate, n-butanol, cyclohexanol, ethyl alcohol；
Thickener is at least one of sodium carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose；Surfactant
For at least one of ethylene oxide polymer, polyether-based polymers.
Preferably, the preparation method of the application specifically includes following steps,
(1) first by deionized water, alumina powder, binder, dispersant, thickener, surfactant etc. proportionally
It is mixed and made into the ceramic slurry；
(2) ceramic slurry is coated on to the one or both sides of basement membrane, drying processing obtains moisture and reaches
To the 500ppm diaphragms below with ceramic coating；
Wherein coating by blade rubbing method, Meyer rod coating method, reverse roll coating method, intaglio plate roller coating method, dip-coating, brush
At least one of apply.
Due to using the technology described above, the advantageous effect of the application is：
There is the application the diaphragm of ceramic coating, creative use specific surface area to be less than 8m2/ g alumina powders and tool
The binder of crosslinking structure to form aluminum oxide coating layer to prepare so that the moisture of diaphragm reaches 500ppm hereinafter, significantly
The content for reducing moisture in diaphragm, reduce and endangered caused by the production and use of battery due to diaphragm moisture height
Evil and security risk, the safety for improving battery production and using.Also, the diaphragm of the application is since moisture is low, drop
Low moisture generates the amount of the pernicious gases such as HF, reduces influences of the HF to battery performance and service life, for prepare it is safe,
Performance is good, long lifespan lithium ion battery is laid a good foundation.
Specific implementation mode
Al2O3Ceramic-coated separator is existing already existing ceramic-coated separator, and still, the application is to Al2O3
Ceramic-coated separator carries out a large amount of practice production and is found during studying, and is less than 8m using specific surface area2/ g aluminium oxide
Powder and binder with cross-linked structure to form aluminum oxide coating layer to prepare, and can be very good to reduce containing for moisture in diaphragm
Amount.Its principle is that the studies have shown that specific surface area of the application is smaller, Al2O3The adhesive moisture in surface is fewer, contains to reduce
Water.And the binder with cross-linked structure can form cross-linked structure, which is distributed in the coating as net, makes painting
Layer structure is finer and close, and coating diaphragm can be prevented to absorb the moisture in air in placement process, aqueous to reduce diaphragm
Amount.In a kind of realization method of the application, the moisture of diaphragm reaches 500ppm hereinafter, being greatly reduced moisture to electricity
It seriously affects and endangers, the safety for improving battery production and using caused by pond production and use；Meanwhile it also reducing
Moisture generates the amount of the pernicious gases such as HF, influences of the HF to battery performance and service life is reduced, to prepare safe, performance
Good, long lifespan lithium ion battery is laid a good foundation.
The application is described in further detail below by specific embodiment.Following embodiment only carries out the application
It further illustrates, should not be construed as the limitation to the application.
Embodiment one
This example uses specific surface area for 6.8m2The alumina powder and polyacrylic acid of/g and ethylene oxide two-component substance
Binder prepare ceramic-coated separator, wherein basement membrane is the single layer PP films that thickness is 14 μm, porosity 39%, hole
Ranging from 0.005-0.15 μm of diameter.Preparation method is as follows：
By deionized water, alumina powder, binder, dispersant, thickener, surfactant according to weight ratio 70:
29:0.6:0.1:0.22:0.08 carries out being mixed with ceramic slurry, and the wherein specific surface area of alumina powder is 6.8m2/ g,
D50 is 0.98 μm, and binder is polyacrylic acid and ethylene oxide.The polyolefin base membrane that this example uses is emerging innovation material in Shenzhen
Expect the single layer PP films that thickness prepared by Technology Co., Ltd. is 14 μm, after preparing ceramic slurry, will be made pottery using gravure roll method
Porcelain slurry is coated in one of PP films surface.Coating speed is 45m/min, and processing is dried after the completion of coating, is dried
Dry temperature is 50 DEG C, and the thickness of coat is 2 μm.The diaphragm with ceramic coating of this example is prepared.
The 831 karl Fischer Moisture Meters led to using Switzerland ten thousand measure the moisture of the ceramic-coated separator of this example, as a result
It has been shown that, moisture 468ppm.
Embodiment two
This example uses specific surface area for 5.9m2The alumina powder and polystyrenebutadienes copolymer binder system of/g
Standby ceramic-coated separator, wherein basement membrane is the single layer PP films that thickness is 14 μm, porosity 39%, and pore diameter range is
0.005-0.15μm.Preparation method is as follows：
Deionized water, alumina powder, binder, dispersant, thickener, surfactant weight ratio in the present embodiment
It is 60:39:0.5:0.15:0.25:0.1 carries out being mixed with ceramic slurry, and the specific surface area of wherein alumina powder is
5.9m2/ g, D50 are 0.98 μm, and binder is polystyrenebutadienes copolymer.The polyolefin base membrane that this example uses is Shenzhen
The single layer PP films that thickness prepared by Zhong Xing innovative materials Technology Co., Ltd. is 14 μm, after preparing ceramic slurry, use is recessed
Ceramic slurry is coated in one of PP films surface by roller method.Coating speed is 45m/min, is carried out after the completion of coating
It is dried, drying temperature is 50 DEG C, and the thickness of coat is 2 μm.The diaphragm with ceramic coating of this example is prepared.
The 831 karl Fischer Moisture Meters led to using Switzerland ten thousand measure the moisture of the ceramic-coated separator of this example, as a result
It has been shown that, moisture 396ppm.
Embodiment three
This example uses specific surface area for 5.0m2The alumina powder and polystyrenebutadienes copolymer binder system of/g
Standby ceramic-coated separator, wherein basement membrane is the single layer PP films that thickness is 14 μm, porosity 39%, and pore diameter range is
0.005-0.15μm.Preparation method is as follows：
Deionized water, alumina powder, binder, dispersant, thickener, surfactant weight ratio in the present embodiment
It is 55:43.8:0.7:0.2:0.2:0.1 carries out being mixed with ceramic slurry, and the specific surface area of wherein alumina powder is
5.0m2/ g, D50 are 0.89 μm, and binder is polystyrenebutadienes copolymer.The polyolefin base membrane that this example uses is Shenzhen
The single layer PP films that thickness prepared by Zhong Xing innovative materials Technology Co., Ltd. is 14 μm, after preparing ceramic slurry, use is recessed
Ceramic slurry is coated in one of PP films surface by roller method.Coating speed is 40m/min, is carried out after the completion of coating
It is dried, drying temperature is 50 DEG C, and the thickness of coat is 4 μm.The diaphragm with ceramic coating of this example is prepared.
The 831 karl Fischer Moisture Meters led to using Switzerland ten thousand measure the moisture of the ceramic-coated separator of this example, as a result
It has been shown that, moisture 434ppm.
Comparative example 1
This example is identical as the ceramic-coated separator of embodiment one and preparation method, the difference is that this example uses specific surface
Product is 14.3m2The alumina powder of/g prepares ceramic-coated separator, other components and condition, including the D50 of alumina powder,
Binder, basement membrane and the other components of ceramic slurry and content are all identical as embodiment one, preparation method also with one phase of embodiment
Together.The diaphragm for the ceramic coating that the final thickness for preparing coat is 2 μm.
Equally, the moisture for the ceramic-coated separator that the 831 karl Fischer Moisture Meters led to using Switzerland ten thousand measure this example contains
Amount, the results show that its moisture is 622ppm.
Comparative example 2
This example is identical as the ceramic-coated separator of embodiment one and preparation method, the difference is that this example uses specific surface
Product is 15.2m2The alumina powder and Kynoar binder of/g prepares ceramic-coated separator, other components and condition, packet
The other components of D50, basement membrane and ceramic slurry and the content for including alumina powder are all identical as embodiment one, preparation method also with
Embodiment one is identical.The diaphragm for the ceramic coating that the final thickness for preparing coat is 2 μm.
Equally, the moisture for the ceramic-coated separator that the 831 karl Fischer Moisture Meters led to using Switzerland ten thousand measure this example contains
Amount, the results show that its moisture is 805ppm.
It is as shown in table 1 to the moisture statistical result of above example and comparative example.
1 ceramic-coated separator moisture testing result of table
By the statistical result of table 1 it is found that compared with comparative example 1, comparative example 2, prepared by embodiments herein 1 to 3
The moisture of ceramic coating membrane is significant lower, in 500ppm or less；The reduction of diaphragm water content, greatly reduction pair
The loss of electrolyte, while the bulge risk in battery production and use is reduced, improve the safety of battery.
The application further on the basis of embodiment one, to the specific surface area of alumina powder to ceramic coating every
The moisture influence of film is studied.The results show that on the basis of embodiment one, the specific surface area of alumina powder
Less than 8m2The moisture of diaphragm prepared by/g is all in 500ppm hereinafter, the specific surface area with alumina powder increases institute
The moisture of the diaphragm of preparation can suitably increase.In addition, binder is other than the binder that three embodiments use,
The binder for the one-component substance or two-component substance that it can crosslink reaction may be suitable for the application；One-component
The binder of substance is for example：Polyacrylonitrile and polyacrylamide；The binder of two-component substance is for example, first group is divided into poly- third
Olefin(e) acid, polyacrylic acid derivative, polyacrylate or polyacrylate derivatives；Second group is divided into ethylene oxide, ethylene oxide
Polymer, propylene oxide, propylene oxide derivatives, epoxypropane polymer, epoxypropane polymer derivative, ethoxy are fine
Dimension element, polyvinyl alcohol.On the basis of embodiment one, the thickness of aluminum oxide coating layer is 0.5-10 μm, the water of prepared diaphragm
Point content is all in 500ppm hereinafter, the moisture of the diaphragm prepared by increase with coating layer thickness can suitably increase.
The foregoing is a further detailed description of the present application in conjunction with specific implementation manners, and it cannot be said that originally
The specific implementation of application is confined to these explanations.For those of ordinary skill in the art to which this application belongs, not
Under the premise of being detached from the application design, a number of simple deductions or replacements can also be made.
Claims (10)
1. a kind of diaphragm with ceramic coating, including basement membrane and the ceramic coating coated at least one surface of basement membrane, described
Ceramic coating is aluminum oxide coating layer, it is characterised in that：In the aluminum oxide coating layer, the specific surface area of alumina powder is less than 8m2/
G, used binder are the binder with cross-linked structure, and the moisture of the diaphragm reaches 500ppm or less.
2. diaphragm according to claim 1, it is characterised in that：The grain size of the alumina powder be 0.01 μm≤D50≤
10μm；
Preferably, the grain size of alumina powder is 0.03 μm≤D50≤3 μm.
3. diaphragm according to claim 1, it is characterised in that：The binder with cross-linked structure is by that can hand over
Join the one-component substance or two-component material composition of reaction；
The one-component substance is selected from least one of polystyrenebutadienes copolymer, polyacrylonitrile and polyacrylamide；
In the two-component substance, first group is divided into polyacrylic acid or derivatives thereof, polyacrylate or derivatives thereof extremely
Few one kind；Second group is divided into spreading out for ethylene oxide or its polymer, propylene oxide or its polymer, propylene oxide or its polymer
At least one of biology, hydroxyethyl cellulose, polyvinyl alcohol.
4. diaphragm according to claim 1, it is characterised in that：The thickness of the aluminum oxide coating layer is 0.5-10 μm.
5. according to claim 1-4 any one of them diaphragms, it is characterised in that：The basement membrane is polyethene microporous membrane, poly- third
Alkene microporous barrier, or the MULTILAYER COMPOSITE microporous barrier that is made of polyethene microporous membrane and microporous polypropylene membrane；Preferably, the basement membrane
Thickness is 5-20 μm, porosity ranges 30%-60%, and pore diameter range is 0.005-0.15 μm.
6. a kind of lithium ion battery using claim 1-5 any one of them diaphragms.
7. according to the preparation method of claim 1-5 any one of them diaphragms, it is characterised in that：Including small using specific surface area
In 8m2The alumina powder of/g, and the binder with cross-linked structure prepare ceramic slurry, and ceramic slurry is coated on basement membrane
At least one surface obtains moisture and reaches the 500ppm diaphragms below with ceramic coating after drying process.
8. preparation method according to claim 7, it is characterised in that：Include alumina powder in the ceramic slurry, viscous
Tie agent, dispersant, thickener and surfactant；Wherein, the content of binder is the 0.5-10% of total weight, and dispersant contains
Amount is the 0-2% of total weight, and the content of thickener is the 0-5% of total weight, and the content of surfactant is the 0.05- of total weight
3%, surplus is solvent；Preferably, solvent is deionized water.
9. preparation method according to claim 8, it is characterised in that：The dispersant is Sodium Polyacrylate, polyacrylic acid
At least one of ammonium, n-butanol, cyclohexanol, ethyl alcohol；
The thickener is at least one of sodium carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose；
The surfactant is at least one of ethylene oxide polymer, polyether-based polymers.
10. preparation method according to claim 8 or claim 9, it is characterised in that：Specifically include following steps,
(1) first deionized water, alumina powder, binder, dispersant, thickener, surfactant etc. are proportionally mixed
The ceramic slurry is made；
(2) ceramic slurry is coated on to the one or both sides of basement membrane, drying processing obtains moisture and reaches
The 500ppm diaphragms below with ceramic coating；
In the coating by blade rubbing method, Meyer rod coating method, reverse roll coating method, intaglio plate roller coating method, dip-coating, brushing
It is at least one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711484940.2A CN108336277A (en) | 2017-12-29 | 2017-12-29 | A kind of diaphragm and preparation method thereof with ceramic coating |
| PCT/CN2018/092012 WO2019128147A1 (en) | 2017-12-29 | 2018-06-20 | Separator with ceramic coating and preparation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711484940.2A CN108336277A (en) | 2017-12-29 | 2017-12-29 | A kind of diaphragm and preparation method thereof with ceramic coating |
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| CN108336277A true CN108336277A (en) | 2018-07-27 |
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| CN201711484940.2A Pending CN108336277A (en) | 2017-12-29 | 2017-12-29 | A kind of diaphragm and preparation method thereof with ceramic coating |
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| WO (1) | WO2019128147A1 (en) |
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| CN109461866A (en) * | 2018-08-30 | 2019-03-12 | 上海顶皓新材料科技有限公司 | A kind of low moisture lithium ion battery ceramic coating membrane and preparation method thereof |
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| CN109411679A (en) * | 2018-10-22 | 2019-03-01 | 乐凯胶片股份有限公司 | Ceramic slurry, ceramic diaphragm and lithium ion battery |
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| CN110571393A (en) * | 2019-07-29 | 2019-12-13 | 河北金力新能源科技股份有限公司 | slurry for lithium battery diaphragm, preparation method of slurry, lithium battery diaphragm and lithium battery |
| CN111081953A (en) * | 2019-11-20 | 2020-04-28 | 河北金力新能源科技股份有限公司 | Diaphragm slurry for efficiently capturing metal ions, diaphragm and application of diaphragm |
| CN113078414A (en) * | 2019-12-17 | 2021-07-06 | 山东海科创新研究院有限公司 | Polypropylene composite diaphragm with low-temperature thermal closed-cell mechanism, preparation method thereof and lithium ion battery |
| WO2021120858A1 (en) * | 2019-12-20 | 2021-06-24 | 江苏厚生新能源科技有限公司 | High-wetting long-cycle alumina ceramic slurry and preparation method therefor, and lithium battery diaphragm |
| CN111180644A (en) * | 2020-01-06 | 2020-05-19 | 镝普材料(深圳)有限公司 | Lithium ion battery diaphragm with ultrathin coating layer |
| CN112864532A (en) * | 2021-01-12 | 2021-05-28 | 天津市捷威动力工业有限公司 | Preparation method and application of long-lasting coated polyolefin diaphragm |
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