CN106519872A - Coating slurry, lithium-ion battery separator and preparation methods of coating slurry and lithium-ion battery separator - Google Patents
Coating slurry, lithium-ion battery separator and preparation methods of coating slurry and lithium-ion battery separator Download PDFInfo
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- 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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/003—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- C08F257/00—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
- C08F257/02—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
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- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- 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
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- 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
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Abstract
The invention relates to the technical field of lithium-ion batteries and provides coating slurry, a lithium-ion battery separator and preparation methods of the coating slurry and the lithium-ion battery separator. The coating slurry is prepared from, in parts by weight, 5-40 parts of inorganic nanoparticles, 30-90 parts of gel polymer monomers and 0.5-5 parts of polar monomers through mixing and a polymerization reaction; the coating slurry is applied to one side or two sides of a base membrane, and the lithium-ion battery separator is obtained after hot air drying. In the hot pressing process of the battery, a gel polymer in a coating adsorbs electrolyte and can form a film on the separator, and the separator and a pole piece are bonded together through van der waals force between a polar functional group on a polymer molecular chain and an electrode material. The lithium-ion battery separator and the pole piece have the good bonding property, and the hardness of the battery can be effectively improved.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of coating paste, lithium ion battery separator and its
Preparation method.
Background technology
With the continuous extension in lithium ion battery applications field, the update of digital product constantly accelerates, mobile phone, flat board
The requirement more and more thinner to dimensional thickness such as computer, but the hidden danger in terms of thinner battery necessarily brings some security performances, such as
The hardness of thin battery core, shock resistance are poor, cause the security performance of digital products to reduce.Therefore how to realize barrier film with
Pole piece is bonded to one, and need at present the urgent problem for solving so as to the hardness for improving battery becomes.
In lithium battery structure, barrier film is one of crucial interior layer assembly, isolation both positive and negative polarity, prevents the two poles of the earth contact and short
Road, the function of additionally passing through with offer electrolyte ion.Same thin to the thickness requirement of barrier film of digital Li-like ions battery
When, still needing to ensure the security performance of battery, the performance of barrier film determines the interfacial structure of battery, directly affects the safety of battery
The characteristics such as energy, circulation, capacity.
The battery hardness of the especially thinner polyalkene diaphragm assembling of polyalkene diaphragm is difficult to meet number class Soft Roll now
The use requirement of battery, causes the safety issue of battery, and the shortcoming of the wellability difference to electrolyte, improves safety at present
The main solution of performance is the single or double coated ceramic granule in polyalkene diaphragm.In prior art, application number
Chinese patent literature for 201610024165.1 reports a kind of functional coat barrier film and the battery containing the barrier film, wherein
Functional coat barrier film is made up of with the coating for coating the polyolefin substrate surface polyolefin base material, the preparation of the coating
Slurry includes aqueous polyvinylidene fluorothene, inorganic nano ceramic particle and water.But, but ceramic coating membrane can not be effective
Improve the adhesive property between barrier film and pole piece, so as to the hardness of battery cannot be guaranteed.
The content of the invention
Present invention solves the technical problem that be that a kind of coating paste, lithium ion battery separator and preparation method thereof are provided,
The lithium ion battery separator has high-adhesion energy, effectively improves the hardness of battery.
The present invention provides a kind of coating paste, including following component：
5～40 weight portion of inorganic nanoparticles；
30～90 weight portion of gelatin polymer；
0.5～5 weight portion of polar monomer,
The polar monomer is acrylic acid, acrylonitrile, n-methylolacrylamide, one or more in acrylamide.
Preferably, the inorganic nanoparticles be nano silicon oxide, nano aluminium oxide, nano barium phthalate, nano-titanium oxide,
One or more in nano-calcium carbonate, nano zircite.
Preferably, the monomer of the gelatin polymer is butyl acrylate, ethyl acrylate, 2-(Acryloyloxy)ethanol, methyl
One or more in acrylic acid methyl ester., styrene.
Accordingly, the present invention also provides a kind of preparation method of coating paste, comprises the following steps：By 5～40 weight portions
Inorganic nanoparticles, 30～90 weight portion gelatin polymers, the mixing of 0.5～5 weight portion polar monomer, are applied after polyreaction
Layer slurry, the polar monomer are acrylic acid, acrylonitrile, n-methylolacrylamide, one or more in acrylamide.
Preferably, the inorganic nanoparticles be nano silicon oxide, nano aluminium oxide, nano barium phthalate, nano-titanium oxide,
One or more in nano-calcium carbonate, nano zircite.
Preferably, the monomer of the gelatin polymer is butyl acrylate, ethyl acrylate, 2-(Acryloyloxy)ethanol, methyl
One or more in acrylic acid methyl ester., styrene.
Accordingly, the present invention also provides a kind of preparation method of lithium ion battery separator, comprises the following steps：By 5～40
Parts by weight of inorganic nano-particle, 30～90 weight portion gelatin polymers, the mixing of 0.5～5 weight portion polar monomer, after polyreaction
Obtain coating paste, the polar monomer is acrylic acid, acrylonitrile, n-methylolacrylamide, the one kind or several in acrylamide
Kind；The coating paste is coated on into the one or both sides of basement membrane, lithium ion battery separator after hot-air seasoning, is obtained.
Preferably, the basement membrane is polypropylene porous membrane, polyethylene porous thin film or polypropylene-polyethylene-polypropylene
Three layers of composite porous film.
Preferably, coating speed is 5～40m/min.
Preferably, the temperature of hot-air seasoning is 30～80 DEG C.
The invention provides a kind of coating paste, lithium ion battery separator and preparation method thereof, including：By 5～40 weight
Part inorganic nanoparticles, 30～90 weight portion gelatin polymers, the polymerization of 0.5～5 weight portion polar monomer, obtain coating paste；
The coating paste is coated on into the one or both sides of basement membrane, lithium ion battery separator after hot-air seasoning, is obtained.With prior art
Compare, after battery hot pressing, the gelatin polymer Electolyte-absorptive in coating can be in membrane surface film forming, polymer molecule
Barrier film and pole piece bonding are got up by the Van der Waals force on chain between the polar functional group and electrode material of institute's band, effectively improve battery
Hardness.There is microphase-separated simultaneously between inorganic nanoparticles and gelatin polymer, generation is available for the sky that ion passes through in a large number
Gap passage.Therefore, the lithium ion battery separator that the present invention is provided has good high-adhesion energy, improves the hardness of battery.This
Outward, preparation process of the present invention is simple to operate, low cost, Environmental Safety, is effectively improved size of the battery during recycling
Stability, improves battery safety.
Description of the drawings
The structural representation of Fig. 1 high-adhesion coating composite particles of the present invention；
Lithium ion battery separator scanning electron microscope (SEM) photograph prepared by Fig. 2 embodiment of the present invention.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, but
It should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention, rather than to the claims in the present invention
Limit.
The embodiment of the invention discloses a kind of coating paste, including following component：
5～40 weight portion of inorganic nanoparticles；
30～90 weight portion of gelatin polymer；
0.5～5 weight portion of polar monomer,
The polar monomer is acrylic acid, acrylonitrile, n-methylolacrylamide, one or more in acrylamide.
Preferably, the inorganic nanoparticles be preferably nano silicon oxide, nano aluminium oxide, nano barium phthalate,
One or more in nano-titanium oxide, nano-calcium carbonate, nano zircite.The monomer of the gelatin polymer is preferably propylene
One or more in acid butyl ester, ethyl acrylate, 2-(Acryloyloxy)ethanol, methyl methacrylate, styrene.
Preferably, inorganic nanoparticles are preferably 10～40 weight portions, and gelatin polymer is preferably 30～89 weights
Amount part, polar monomer are preferably 1～5 weight portion.
Accordingly, the present invention also provides a kind of preparation method of coating paste, comprises the following steps：By 5～40 weight portions
Inorganic nanoparticles, 30～90 weight portion gelatin polymers, the mixing of 0.5～5 weight portion polar monomer, are applied after polyreaction
Layer slurry, the polar monomer are acrylic acid, acrylonitrile, n-methylolacrylamide, one or more in acrylamide.
Preferably, the inorganic nanoparticles be preferably nano silicon oxide, nano aluminium oxide, nano barium phthalate,
One or more in nano-titanium oxide, nano-calcium carbonate, nano zircite.The monomer of the gelatin polymer is preferably propylene
One or more in acid butyl ester, ethyl acrylate, 2-(Acryloyloxy)ethanol, methyl methacrylate, styrene.
Preferably, in prepares coating slurry process, the present invention is additionally added emulsifying agent and initiator.The present invention is adopted
Emulsifying agent and initiator preferably adopt reagent well known to those skilled in the art, and this is not particularly limited.
Coating paste prepared by the present invention is preferably the composite particles of polymer overmold inorganic nano material, and mean diameter is excellent
Elect 40～1000nm as.
Using the coating paste of above-mentioned preparation, the present invention also provides a kind of preparation method of lithium ion battery separator, including
Following steps：By 5～40 parts by weight of inorganic nano-particle, 30～90 weight portion gelatin polymers, 0.5～5 weight portion polarity list
Body is polymerized, and obtains coating paste, the polar monomer be acrylic acid, acrylonitrile, n-methylolacrylamide, in acrylamide one
Plant or several；The coating paste is coated on into the one or both sides of basement membrane, lithium ion battery separator after hot-air seasoning, is obtained.
Preferably, the present invention is additionally added emulsifying agent and initiator.The emulsifying agent and initiator that the present invention is adopted is excellent
Choosing is not particularly limited to this using reagent well known to those skilled in the art.
Preferably, the basement membrane be polypropylene porous membrane, polyethylene porous thin film or polypropylene-polyethylene-
Three layers of composite porous film of polypropylene.Basement membrane thickness is preferably 5～30 μm, and porosity is preferably 30%～70%, average pore size
Preferably 5～1000nm.
Preferably, coating speed is preferably 5～40m/min；Coating thickness is preferably 0.2～2 μm；Hot-air seasoning
Temperature be preferably 30～80 DEG C.
The present invention provides a kind of preparation method of high-adhesion coating lithium ion battery separator, institute's band on polymer molecular chain
Polar functional group and electrode material between Van der Waals force, improve the caking property between barrier film and electrode material, increased
The hardness of battery, improves the heat stability of barrier film, and the hardness and dimensional stability to improving digital class battery plays important
Effect.
After forming barrier film, by heat pressing process, barrier film is bonded together with pole piece, it is under the infiltration of electrolyte, inorganic
Between nano-particle and organic polymer occur be separated provide ionic conduction hole, while polar functional group provide barrier film with
Van der Waals force between pole piece realizes the bonds well of barrier film and pole piece.The heat pressing process that the present invention is adopted：Pressure is preferably 0.1
～10MP, temperature are preferably 50～120 DEG C, and the time is preferably 10～300s.Preferably, bond barrier film and pole piece coating
The solid content of slurry is 5-50%.
, after hot pressing, gelatin polymer Electolyte-absorptive can be in membrane surface film forming, on polymer molecular chain for battery
Barrier film and pole piece bonding are got up by the Van der Waals force between the polar functional group and electrode material of institute's band, while inorganic nanoparticles
There is microphase-separated between gelatin polymer, generation is available for the interstitial channels that ion passes through in a large number.
The present invention is prepared for a kind of polymer-coated barrier film with polar functional group, under certain hot pressing condition, utilizes
Intermolecular Van der Waals force realizes the good bonding between coating barrier film and electrode slice, can effectively improve between barrier film and electrode
Cohesive force, while the requirement while hardness of battery, solution number class battery request more and more thinner can be improved to hardness.
For a further understanding of the present invention, the technical scheme that the present invention is provided is carried out specifically with reference to embodiment
Bright, protection scope of the present invention is not limited by the following examples.
Embodiment 1
As shown in figure 1, a kind of high-adhesion coating paste, by inorganic nanoparticles, gelatin polymer monomer, polar monomer
Polymerization, wherein inorganic nanoparticles are nano barium phthalate, account for 10 parts of solid amount；Gelatin polymer is butyl acrylate and third
The copolymer of olefin(e) acid hydroxyl ethyl ester, copolymerization ratios are 7:3,89 parts of solid amount are accounted for altogether；Polar monomer is acrylonitrile, accounts for solid total
1 part of amount；The solid content of slurry is 20%, and mean diameter is 300nm.
Embodiment 2
As shown in figure 1, a kind of high-adhesion coating paste, by inorganic nanoparticles, gelatin polymer monomer, polarity list
Body, polymerization, wherein inorganic nanoparticles are nano aluminium oxide, account for 20 parts of solid amount；Gelatin polymer is methacrylic acid
Methyl ester and cinnamic copolymer, copolymerization ratios are 5:5,78 parts of solid amount are accounted for altogether；Polar monomer is acrylonitrile, accounts for solid
2 parts of total amount；The solid content of slurry is 30%, and mean diameter is 500nm.
Embodiment 3
As shown in figure 1, a kind of high-adhesion coating paste, by inorganic nanoparticles, gelatin polymer monomer, polarity list
Body, polymerization, wherein inorganic nanoparticles are the mixture of nano zircite and nano-titanium oxide, and mass ratio is 1:1, solid is accounted for altogether
32 parts of total amount；Gelatin polymer is the copolymer of methyl methacrylate and acrylamide, and copolymerization ratios are 8:2, account for solid altogether
65 parts of body total amount；Polar monomer is acrylic acid, accounts for 3 parts of solid amount；The solid content of slurry is 25%, and mean diameter is
200nm。
Embodiment 4
As shown in Fig. 2 a kind of high-adhesion coating lithium ion battery separator, wherein basement membrane are polyethylene film, thickness is 9 μ
M, porosity are 50%, and average pore size is 35nm.In high-adhesion coating, inorganic nanoparticles are nano-titanium oxide, account for solid total
12 parts of amount；Gelatin polymer is 2-(Acryloyloxy)ethanol and cinnamic copolymer, and copolymerization ratios are 2:8, solid amount is accounted for altogether
84 parts；Polar monomer is that acrylic acid and n-methylolacrylamide are constituted, and mass ratio is 3:2, account for 4 parts of solid amount；Slurry
Solid content be 12%, mean diameter is 600nm.Mixed slurry is applied to the both sides of polyethylene film using coating machine, is coated with
Speed is 35m/min, and coating thickness is 0.5 μm per side, and 45 DEG C of hot-air seasonings obtain finished film.
Embodiment 5
As shown in Fig. 2 a kind of high-adhesion coating lithium ion battery separator, wherein basement membrane are polypropylene-polyethylene-poly- third
Three layers of composite porous film of alkene, thickness are 12 μm, and porosity is 30%, and average pore size is 45nm.It is inorganic in high-adhesion coating
Nano-particle is nano-calcium carbonate, accounts for 15 parts of solid amount；Gelatin polymer is 2-(Acryloyloxy)ethanol and methyl methacrylate
The copolymer of ester, copolymerization ratios are 3:7,82 parts of solid amount are accounted for altogether；Polar monomer is acrylic acid, and mass ratio is 3:2, account for solid
3 parts of body total amount；The solid content of slurry is 20%, and mean diameter is 150nm.Mixed slurry is applied to into PP/ using coating machine
The both sides of PE/PP sandwich diaphragms, coating speed are 25m/min, and coating thickness is 1.5 μm per side, and 50 DEG C of hot-air seasonings are obtained
Finished film.
Embodiment 6
A kind of high-adhesion coating lithium ion battery separator, wherein basement membrane are polypropylene diaphragm, and thickness is 25 μm, porosity
For 42%, average pore size is 35nm.In high-adhesion coating, inorganic nanoparticles are the mixture of nano aluminium oxide and titanium oxide,
Mass ratio is 2:1, account for 35 parts of solid amount；Gelatin polymer is butyl acrylate and cinnamic copolymer, copolymerization ratios
For 1:9,64 parts of solid amount are accounted for altogether；Polar monomer is acrylamide, accounts for 1 part of solid amount；The solid content of slurry is
8%, mean diameter is 750nm.Mixed slurry is applied to the both sides of polypropylene screen using coating machine, coating speed is 15m/
Min, coating thickness are 0.6 μm per side, and 70 DEG C of hot-air seasonings obtain finished film.Barrier film, enters with pole piece coiling into after soft-package battery
Row hot pressing, pressure are 0.5MP, and temperature is 100 DEG C, and the time is 60s, with universal tensile testing machine, by barrier film with pole piece with 80mm/
The speed of min is peeled off, and the peeling force between barrier film and pole piece is 3.5N, adopts the hardness of three-point bending method test battery for 21.3N/
cm。
Embodiment 7
A kind of high-adhesion coating lithium ion battery separator, wherein basement membrane are tri- layers of composite diaphragms of PP/PE/PP, and thickness is
20 μm, porosity is 37%, and average pore size is 40nm.In high-adhesion coating, inorganic nanoparticles are nano aluminium oxide and carbonic acid
The mixture of calcium, mass ratio are 1:2, account for 25 parts of solid amount；Gelatin polymer is ethyl acrylate and methyl methacrylate
The copolymer of ester, copolymerization ratios are 4:6,73 parts of solid amount are accounted for altogether；Polar monomer is acrylic acid, accounts for 2 parts of solid amount；
The solid content of slurry is 24%, and mean diameter is 100nm.Mixed slurry is applied to tri- layers of PP/PE/PP using coating machine to be combined
The both sides of barrier film, coating speed are 38m/min, and coating thickness is 1.8 μm per side, and 50 DEG C of hot-air seasonings obtain finished film.Barrier film
With pole piece coiling into after soft-package battery, hot pressing is carried out, pressure is 2MP, and temperature is 80 DEG C, and the time is 240s.Tried with universal tensile
Machine is tested, barrier film is peeled off with the speed of 120mm/min with pole piece, the peeling force between barrier film and pole piece is 2.8N, curved using 3 points
The hardness of bent method test battery is 27.6N/cm.
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these improve and modification is also fallen in the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (10)
1. a kind of coating paste, it is characterised in that including following component：
5～40 weight portion of inorganic nanoparticles；
30～90 weight portion of gelatin polymer；
0.5～5 weight portion of polar monomer,
The polar monomer is acrylic acid, acrylonitrile, n-methylolacrylamide, one or more in acrylamide.
2. coating paste according to claim 1, it is characterised in that the inorganic nanoparticles are nano silicon oxide, receive
One or more in rice aluminium oxide, nano barium phthalate, nano-titanium oxide, nano-calcium carbonate, nano zircite.
3. coating paste according to claim 1, it is characterised in that the monomer of the gelatin polymer is acrylic acid fourth
One or more in ester, ethyl acrylate, 2-(Acryloyloxy)ethanol, methyl methacrylate, styrene.
4. a kind of preparation method of coating paste, it is characterised in that comprise the following steps：
5～40 parts by weight of inorganic nano-particle, 30～90 weight portion gelatin polymers, 0.5～5 weight portion polar monomer are mixed
Close, after polyreaction, obtain coating paste, the polar monomer is acrylic acid, acrylonitrile, n-methylolacrylamide, acrylamide
In one or more.
5. preparation method according to claim 4, it is characterised in that the inorganic nanoparticles are nano silicon oxide, receive
One or more in rice aluminium oxide, nano barium phthalate, nano-titanium oxide, nano-calcium carbonate, nano zircite.
6. preparation method according to claim 4, it is characterised in that the monomer of the gelatin polymer is acrylic acid fourth
One or more in ester, ethyl acrylate, 2-(Acryloyloxy)ethanol, methyl methacrylate, styrene.
7. a kind of preparation method of lithium ion battery separator, it is characterised in that comprise the following steps：
5～40 parts by weight of inorganic nano-particle, 30～90 weight portion gelatin polymers, 0.5～5 weight portion polar monomer are mixed
Close, after polyreaction, obtain coating paste, the polar monomer is acrylic acid, acrylonitrile, n-methylolacrylamide, acrylamide
In one or more；
The coating paste is coated on into the one or both sides of basement membrane, lithium ion battery separator after hot-air seasoning, is obtained.
8. preparation method according to claim 7, it is characterised in that the basement membrane is polypropylene porous membrane, polyethylene
Three layers of composite porous film of porous membrane or polypropylene-polyethylene-polypropylene.
9. preparation method according to claim 7, it is characterised in that coating speed is 5～40m/min.
10. preparation method according to claim 7, it is characterised in that the temperature of hot-air seasoning is 30～80 DEG C.
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| CN107230766A (en) * | 2017-06-13 | 2017-10-03 | 深圳市星源材质科技股份有限公司 | A kind of multinuclear single shell structure gelatin polymer coating barrier film and preparation method thereof |
| CN111100523A (en) * | 2019-12-31 | 2020-05-05 | 中兴高能技术有限责任公司 | Coating composition for lithium battery diaphragm and preparation method thereof |
| CN113214717A (en) * | 2021-05-25 | 2021-08-06 | 中国电子科技集团公司第十八研究所 | Preparation method of self-healing lithium battery diaphragm coating |
| EP3968428A1 (en) * | 2020-09-10 | 2022-03-16 | SK Innovation Co., Ltd. | Separator for lithium secondary battery, method of producing the same, and electrochemical device including the same |
| CN115411457A (en) * | 2020-06-08 | 2022-11-29 | 德州东鸿制膜科技有限公司 | Lithium ion battery diaphragm and preparation method and application thereof |
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| CN107230766A (en) * | 2017-06-13 | 2017-10-03 | 深圳市星源材质科技股份有限公司 | A kind of multinuclear single shell structure gelatin polymer coating barrier film and preparation method thereof |
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| EP3968428A1 (en) * | 2020-09-10 | 2022-03-16 | SK Innovation Co., Ltd. | Separator for lithium secondary battery, method of producing the same, and electrochemical device including the same |
| CN113214717A (en) * | 2021-05-25 | 2021-08-06 | 中国电子科技集团公司第十八研究所 | Preparation method of self-healing lithium battery diaphragm coating |
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