CN108039440A - A kind of power battery sticky membrane and preparation method thereof - Google Patents
A kind of power battery sticky membrane and preparation method thereof Download PDFInfo
- Publication number
- CN108039440A CN108039440A CN201711197222.7A CN201711197222A CN108039440A CN 108039440 A CN108039440 A CN 108039440A CN 201711197222 A CN201711197222 A CN 201711197222A CN 108039440 A CN108039440 A CN 108039440A
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- China
- Prior art keywords
- membrane
- power battery
- sticky
- inoganic solids
- oxide
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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
-
- 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
-
- 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
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- 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 also discloses a kind of power battery viscosity membrane, oxide coating is coated at least one surface of basement membrane, viscous syrup layer is coated at least one surface of the basement membrane of coating oxide coating.A kind of preparation method the invention also discloses power battery with sticky membrane, including：Inoganic solids oxide, auxiliary agent, water are mixed, obtain inoganic solids oxide pre-dispersed liquid；Inoganic solids oxide pre-dispersed liquid is coated in membrane surface, it is dry, obtain the first membrane；Viscous polymer solution, swelling binder, wetting agent are mixed, obtain viscous syrup；Viscous syrup is coated in the first membrane surface, it is dry, obtain the sticky membrane of power battery.The present invention is using water system viscosity membrane as power battery diaphragm, the positive/negative plate of electrode is bonded together, battery is not only effectively avoided to fall, collide the inconsistent phenomenon for causing membrane and pole piece, it is safe, and " dead band " during Lithium-ion embeding, deintercalation can be reduced, the improvement for cell interface is of great significance.
Description
Technical field
The present invention relates to power battery diaphragm technical field, more particularly to a kind of power battery sticky membrane and its preparation
Method.
Background technology
Lithium ion battery is because having the advantages that energy density is high, and operating voltage is high, has extended cycle life, memory-less effect, extensively
It is general to be applied to the large-scale application fields such as national defense industry, electronic industry, space technology.
Lithium ion battery is mainly by positive and negative electrode material, electrolyte, membrane, shell composition.Membrane is as lithium ion battery
One of critical material, it is characterised in that barrier positive and negative electrode, prevent short circuit, only allow lithium ion by do not allow electronics by, every
The performance of film determines the interfacial structure of battery, internal resistance etc., directly affects the spies such as capacity, circulation and the security performance of battery
Property.
Power lithium-ion battery requires also higher and higher, adjoint lithium ion battery energy density for the security performance of battery
Lifting, membrane gradually moves towards lightening, but gap is big between existing lithium-ion membrane and positive/negative plate, easily sliding between positive/negative plate
Dynamic dislocation, the easy contact short circuit of battery plus-negative plate, security is poor, and in addition lithium ion is also easy to produce " dead band " in insertion, deintercalation process, urgently
It is to be solved.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of sticky membrane of power battery and its preparation
The positive/negative plate of electrode is bonded together by method, gained membrane, is not only effectively avoided battery from falling, is collided and cause membrane and pole
The inconsistent phenomenon of piece, it is safe, and " dead band " during Lithium-ion embeding, deintercalation can be reduced, in addition gained membrane heat is received
Contracting is low, and membrane and pole piece are completely embedded, and are had a safety feature, strong to the wellability of electrolyte, imbibition and liquid-keeping property.
A kind of sticky membrane of power battery proposed by the present invention, at least one surface of basement membrane, coating oxide applies
Layer, viscous syrup layer is coated at least one surface of the basement membrane of coating oxide coating.
Preferably, basement membrane thickness is 12 μm -16 μm.
Preferably, oxide coating thickness is 2-4 μm.
Preferably, power battery is 16-18 μm with sticky membrane gross thickness.
Preferably, basement membrane is polyethylene film.
Preferably, oxide coating includes inoganic solids oxide and auxiliary agent.It is further preferred that inoganic solids oxide
For boehmite, SiO2、Al2O3、MgO、ZrO2At least one of.
A kind of power battery preparation method of sticky membrane proposed by the present invention, comprises the following steps：
S1, by inoganic solids oxide, auxiliary agent, water mix, obtain inoganic solids oxide pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid be coated in membrane surface, dry, obtains the first membrane；
S3, by viscous polymer solution, swelling binder, wetting agent mix, obtain viscous syrup；
S4, by viscous syrup be coated in the first membrane surface, dry, obtains power battery viscosity membrane.
Preferably, in S1, the mass fraction of inoganic solids oxide pre-dispersed liquid is 30-40%.
Preferably, in S1, auxiliary agent includes dispersant, defoamer, binding agent, wetting agent.
Preferably, in S1, on the basis of the quality of inoganic solids oxide, dispersant 0.3-0.6wt%, defoaming
Agent content is 0.5-1.5wt%, and binder content 5-10wt%, wetting agent content is 0.5-0.8wt%.
Preferably, in S3, the mass fraction of viscous syrup is 10-20%.
It is further preferred that in S3, counted on the basis of the quality of viscous polymer solution, swelling binder content is 1-5wt%.
It is further preferred that in S3, on the basis of viscous syrup quality, wetting agent content is 0.1-0.5wt%.
Preferably, in S3, viscous polymer solution is Kynoar solution and/or polymethyl methacrylate solution.
It is further preferred that in S3, viscous polymer solution is 1 in mass ratio by polymethyl methacrylate and Kynoar：1-5
It is mixed to get.
Preferably, in S2, S4, coating method is coated for single side and/or dual coating.
Preferably, means are coated as at least one of micro- rotogravure application, spraying, spot printing.
Dispersant, binding agent, wetting agent and defoamer are material commonly used in the art in the present invention, for example dispersant can be adopted
With polyphosphazene polymer esters material, binding agent can use acrylic, and wetting agent can use polyethers epoxide copolymer, defoamer
Silicones can be used.
Compared with prior art, the present invention its remarkable advantage is：
1st, compared with traditional lithium ion battery separator, the present invention is using sticky membrane as power battery diaphragm, viscosity
The positive/negative plate of electrode is bonded together by membrane, effectively reduces the thermal contraction performance of membrane, while effectively prevent battery
Fall, in collision process caused by the inconsistent phenomenon of membrane and positive/negative plate, reduce short-circuit incidence, improve the safety of battery
Performance, while the use of sticky membrane, effectively reduce " dead band " of the lithium ion during insertion, deintercalation, for cell interface
Improvement be of great significance.
2nd, the present invention is coated using inoganic solids oxide, improve membrane to the wellability of electrolyte and imbibition,
Liquid-keeping property, and then the cycle performance of lithium ion battery is improved, while the use of inoganic solids oxide is for improving thermal contraction
Also it is of great significance.
3rd, the present invention is using water-based sticky membrane coating material, economic, environmental protection.
Brief description of the drawings
Fig. 1 is the scanning electron microscope (SEM) photograph of the sticky membrane of 1 gained power battery of the embodiment of the present invention.
Fig. 2 is the scanning electron microscope (SEM) photograph of the sticky membrane of 3 gained power battery of the embodiment of the present invention.
Fig. 3 is the scanning electron microscope (SEM) photograph of the sticky membrane of 4 gained power battery of the embodiment of the present invention.
Fig. 4 is the scanning electron microscope (SEM) photograph of the sticky membrane of 7 gained power battery of the embodiment of the present invention.
Embodiment
In the following, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, by 100g Al2O3Powder, 0.6g dispersants, 1g defoamers and suitable quantity of water mixing, with the rotating speed of 1500r/min
2h is stirred, 8g binding agents is then added, is stirred evenly with the rotating speed of 600r/min, obtains the inoganic solids that mass fraction is 40%
Oxide pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated on 12 μm of polyethylene films of thickness, it is dry, obtain coating layer thickness
For 4 μm of the first membrane；
S3, add appropriate wetting agent and 5g swelling binder into 100g aqueous polyvinylidene vinyl fluoride solution, with 500r/min speed
Stir evenly, obtain mass fraction as 20% viscous syrup, the weight ratio of viscous syrup and wetting agent is 100：0.4；
S4, by viscous syrup using rotogravure application mode dual coating in the first membrane surface, dry, obtaining gross thickness is
The sticky membrane of 18 μm of power battery.
Electron-microscope scanning is carried out with sticky membrane to power battery obtained by the present embodiment, as shown in Figure 1.
Embodiment 2
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, by 100g Al2O3Powder, 0.5g dispersants, 0.8g defoamers and suitable quantity of water are stirred with the rotating speed of 1500r/min
2h, is then added 6g binding agents, is stirred evenly with the rotating speed of 600r/min, is obtained the inoganic solids that mass fraction is 35% and is aoxidized
Thing pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated in thickness on 12 μm of polyethylene films, it is dry, obtain applying thickness
Spend the first membrane for 3 μm；
S3, to 100g aqueous polyvinylidene vinyl fluoride solution add appropriate wetting agent and 3g swelling binders, is stirred with 500r/min dresses
Mix and uniformly, obtain mass fraction as 15% viscous syrup, the weight ratio of viscous syrup and wetting agent is 100：0.4；
S4, by viscous syrup using rotogravure application mode dual coating in the first membrane surface, dry, obtaining gross thickness is
The sticky membrane of 17 μm of power battery.
Embodiment 3
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, stir 100g boehmite powders, 0.5g dispersants, 0.8g defoamers and suitable quantity of water with the rotating speed of 1500r/min
2h is mixed, 6g binding agents is then added, is stirred evenly with the rotating speed of 500r/min, obtains the inoganic solids oxygen that mass fraction is 30%
Compound pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated in thickness on 12 μm of polyethylene films, it is dry, obtain applying thickness
Spend the first membrane for 2 μm；
S3, to 100g aqueous polyvinylidene vinyl fluoride solution add appropriate wetting agent and 3g swelling binders, with the rotating speed of 500r/min
Stir evenly, obtain mass fraction as 15% viscous syrup, the weight ratio of viscous syrup and wetting agent is 100：0.4；
S4, by viscous syrup using spraying method dual coating in the first membrane surface, it is dry, obtain gross thickness as 16 μm
Power battery with sticky membrane.
Electron-microscope scanning is carried out with sticky membrane to power battery obtained by the present embodiment, as shown in Figure 2.
Embodiment 4
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, stir 100g MgO powder, 0.3g dispersants, 0.5g defoamers and suitable quantity of water with the rotating speed of 1500r/min
2h, is then added 5g binding agents, is stirred evenly with the rotating speed of 500r/min, is obtained the inoganic solids that mass fraction is 35% and is aoxidized
Thing pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated in thickness on 12 μm of polyethylene films, it is dry, obtain applying thickness
Spend the first membrane for 3 μm；
S3, to the water-based polymethyl methacrylate solutions of 100g add appropriate wetting agent and 1g swelling binders, with 500r/min
Rotating speed stirs evenly, and obtains mass fraction as 10% viscous syrup, and the weight ratio of viscous syrup and wetting agent is 100：0.2；
S4, by viscous syrup using rotogravure application mode dual coating in the first membrane surface, dry, obtaining gross thickness is
The sticky membrane of 16 μm of power battery.
Electron-microscope scanning is carried out with sticky membrane to power battery obtained by the present embodiment, as shown in Figure 3.
Embodiment 5
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, by 100g ZrO2Powder, 0.4g dispersants, 0.5g defoamers and suitable quantity of water are stirred with the rotating speed of 2000r/min
2h, is then added 10g binding agents, is stirred evenly with the rotating speed of 600r/min, obtains the inoganic solids oxygen that mass fraction is 40%
Compound pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated in thickness on 12 μm of polyethylene films, it is dry, obtain applying thickness
Spend the first membrane for 4 μm；
S3, to the water-based polymethyl methacrylate solutions of 100g add appropriate wetting agent and 4g swelling binders, with 500r/min
Rotating speed stir evenly, obtain the viscous syrup that mass fraction is 15%, the weight ratio of viscous syrup and wetting agent is 100：
0.1；
S4, by viscous syrup using spot printing mode dual coating in the first membrane surface, it is dry, obtain gross thickness as 17 μm
Power battery with sticky membrane.
Embodiment 6
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, by 100g Al2O3Powder, 0.6g dispersants, 1g defoamers and suitable quantity of water are stirred with the rotating speed of 1500r/min
2h, is then added 8g binding agents, is stirred evenly with the rotating speed of 600r/min, is obtained the inoganic solids that mass fraction is 40% and is aoxidized
Thing pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated in thickness on 12 μm of polyethylene films, it is dry, obtain applying thickness
Spend the first membrane for 4 μm；
S3, by water-based polymethyl methacrylate solution and aqueous polyvinylidene vinyl fluoride solution be 3 in mass ratio：7 mix
To mixing aqueous polymer solution；Appropriate wetting agent and 5g swelling binders are added to 100g mixing aqueous polymer solution, with 500r/
The rotating speed of min stirs evenly, and obtains mass fraction as 20% viscous syrup, and the weight ratio of viscous syrup and wetting agent is 100：
0.5；
S4, by viscous syrup be coated in the first membrane surface using rotogravure application mode single side, and dry, obtaining gross thickness is
The sticky membrane of 17 μm of power battery.
Embodiment 7
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, by 100g Al2O3Powder, 0.6g dispersants, 1g defoamers and suitable quantity of water are stirred with the rotating speed of 1500r/min
2h, is then added 8g binding agents, is stirred evenly with the rotating speed of 600r/min, is obtained the inoganic solids that mass fraction is 40% and is aoxidized
Thing pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated in thickness on 12 μm of polyethylene films, it is dry, obtain applying thickness
Spend the first membrane for 4 μm；
S3, by water-based polymethyl methacrylate solution and aqueous polyvinylidene vinyl fluoride solution be 1 in mass ratio：4 mix
To mixing aqueous polymer solution；Appropriate wetting agent and 5g swelling binders are added to 100g mixing aqueous polymer solution, with 500r/
The rotating speed of min stirs evenly, and obtains mass fraction as 20% viscous syrup, and the weight ratio of viscous syrup and wetting agent is 100：
0.5；
S4, by viscous syrup using rotogravure application mode dual coating in the first membrane surface, dry, obtaining gross thickness is
The sticky membrane of 17 μm of power battery.
Electron-microscope scanning is carried out with sticky membrane to power battery obtained by the present embodiment, as shown in Figure 4.
Embodiment 8
A kind of power battery preparation method of water-based sticky membrane, comprises the following steps：
S1, by 100g Al2O3Powder, 0.6g dispersants, 1g defoamers and suitable quantity of water are stirred with the rotating speed of 1500r/min
2h, is then added 8g binding agents, is stirred evenly with the rotating speed of 600r/min, is obtained the inoganic solids that mass fraction is 40% and is aoxidized
Thing pre-dispersed liquid；
S2, by inoganic solids oxide pre-dispersed liquid coated in thickness on 12 μm of polyethylene films, it is dry, obtain applying thickness
Spend the first membrane for 4 μm；
S3, by water-based polymethyl methacrylate solution and aqueous polyvinylidene vinyl fluoride solution be 1 in mass ratio：1 mixes
To mixing aqueous polymer solution；Appropriate wetting agent and 5g swelling binders are added to 100g mixing aqueous polymer solution, with 500r/
The rotating speed of min stirs evenly, and obtains mass fraction as 20% viscous syrup, and the weight ratio of viscous syrup and wetting agent is 100：
0.5；
S4, by viscous syrup using spraying method dual coating in the first membrane surface, it is dry, obtain gross thickness as 17 μm
Power battery with sticky membrane.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
- A kind of 1. sticky membrane of power battery, it is characterised in that oxide coating is coated at least one surface of basement membrane, Coat at least one surface coating viscous syrup layer of the basement membrane of oxide coating.
- 2. the sticky membrane of power battery according to claim 1, it is characterised in that basement membrane thickness is 12 μm -16 μm；It is preferred that Ground, oxide coating thickness are 2-4 μm；Preferably, power battery is 16-18 μm with sticky membrane gross thickness.
- 3. the sticky membrane of power battery according to claim 1 or claim 2, it is characterised in that basement membrane is polyethylene film；It is preferred that Ground, oxide coating include inoganic solids oxide and auxiliary agent；It is further preferred that inoganic solids oxide for boehmite, SiO2、Al2O3、MgO、ZrO2At least one of.
- A kind of 4. power battery as described in claim any one of 1-3 preparation method of sticky membrane, it is characterised in that including Following steps：S1, by inoganic solids oxide, auxiliary agent, water mix, obtain inoganic solids oxide pre-dispersed liquid；S2, by inoganic solids oxide pre-dispersed liquid be coated in membrane surface, dry, obtains the first membrane；S3, by viscous polymer solution, swelling binder, wetting agent mix, obtain viscous syrup；S4, by viscous syrup be coated in the first membrane surface, dry, obtains power battery viscosity membrane.
- 5. the preparation method of the sticky membrane of 4 power batteries is wanted according to right, it is characterised in that in S1, inoganic solids oxygen The mass fraction of compound pre-dispersed liquid is 30-40%.
- 6. the preparation method of the sticky membrane of 4 or 5 power batteries is wanted according to right, it is characterised in that in S1, auxiliary agent includes Dispersant, defoamer, binding agent, wetting agent；Preferably, on the basis of the quality of inoganic solids oxide, dispersant is 0.3-0.6wt%, antifoam content 0.5-1.5wt%, binder content 5-10wt%, wetting agent content are 0.5- 0.8wt%.
- 7. according to any one of the claim 4-6 power batteries preparation method of sticky membrane, it is characterised in that in S3, The mass fraction of viscous syrup is 10-20%；Preferably, counted on the basis of the quality of viscous polymer solution, swelling binder content For 1-5wt%；On the basis of viscous syrup quality, wetting agent content is 0.1-0.5wt%.
- 8. according to any one of the claim 4-7 power batteries preparation method of sticky membrane, it is characterised in that in S3, Viscous polymer solution is Kynoar solution and/or polymethyl methacrylate solution；It is further preferred that in S3, glue Property polymer solution by polymethyl methacrylate and Kynoar be 1 in mass ratio：1-5 is mixed to get.
- 9. according to any one of the claim 4-8 power batteries preparation method of sticky membrane, it is characterised in that S2, S4 In, coating method is coated for single side and/or dual coating.
- 10. the preparation method of the sticky membrane of power battery according to claim 9, it is characterised in that coating means are micro- At least one of rotogravure application, spraying, spot printing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108841026A (en) * | 2018-06-22 | 2018-11-20 | 河北金力新能源科技股份有限公司 | A kind of coating paste, coated separator and preparation method thereof |
| CN109065812A (en) * | 2018-07-24 | 2018-12-21 | 乳源东阳光氟树脂有限公司 | Diaphragm coating composition, slurry and preparation method thereof, diaphragm and lithium ion battery |
| CN109638203A (en) * | 2018-11-26 | 2019-04-16 | 合肥国轩高科动力能源有限公司 | A kind of preparation method of lithium ion battery separator |
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| CN105895844A (en) * | 2016-04-15 | 2016-08-24 | 合肥国轩高科动力能源有限公司 | Sticky ceramic diaphragm and preparation method thereof |
| CN106207059A (en) * | 2016-08-12 | 2016-12-07 | 联想(北京)有限公司 | A kind of lithium ion battery separator, its preparation method and application |
| CN106549128A (en) * | 2017-01-19 | 2017-03-29 | 宁德卓高新材料科技有限公司 | A kind of non-all standing formula coats the preparation method of barrier film |
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| US20150380702A1 (en) * | 2011-10-20 | 2015-12-31 | Lg Chem, Ltd. | Method for manufacturing separator, separator manufactured by the method and method for manufacturing electrochemical device including the separator |
| CN105895844A (en) * | 2016-04-15 | 2016-08-24 | 合肥国轩高科动力能源有限公司 | Sticky ceramic diaphragm and preparation method thereof |
| CN106207059A (en) * | 2016-08-12 | 2016-12-07 | 联想(北京)有限公司 | A kind of lithium ion battery separator, its preparation method and application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108841026A (en) * | 2018-06-22 | 2018-11-20 | 河北金力新能源科技股份有限公司 | A kind of coating paste, coated separator and preparation method thereof |
| CN109065812A (en) * | 2018-07-24 | 2018-12-21 | 乳源东阳光氟树脂有限公司 | Diaphragm coating composition, slurry and preparation method thereof, diaphragm and lithium ion battery |
| CN109638203A (en) * | 2018-11-26 | 2019-04-16 | 合肥国轩高科动力能源有限公司 | A kind of preparation method of lithium ion battery separator |
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Application publication date: 20180515 |