CN108711603A - Coloured ceramic coated film of a kind of aramid fiber polymeric compound coating and preparation method thereof - Google Patents
Coloured ceramic coated film of a kind of aramid fiber polymeric compound coating and preparation method thereof Download PDFInfo
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- CN108711603A CN108711603A CN201810394028.6A CN201810394028A CN108711603A CN 108711603 A CN108711603 A CN 108711603A CN 201810394028 A CN201810394028 A CN 201810394028A CN 108711603 A CN108711603 A CN 108711603A
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- aramid fiber
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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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- 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
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Abstract
The present invention proposes that a kind of aramid fiber polymeric compound is coated with coloured ceramic coated film and preparation method thereof, belong to technical field of lithium ion, the problems such as diaphragm prepared by this method can solve high temperature thermal contraction, ceramic coating layer shedding, bad with pole plate cohesive force and detection coats diaphragm coating uniformity, the lithium battery diaphragm porosity is high, coating uniform, good, the high temperature resistant to electrolyte wellability improves lithium ion battery security and chemical property.It includes base material MIcroporous polyolefin film, the coloured ceramic coating layer in polyalkene diaphragm one or both sides surface and ceramic coating one or both sides surface aramid fiber coating layer that the aramid fiber polymeric compound, which is coated with coloured ceramic coated film,.Aramid fiber polymeric compound prepared by the present invention is coated with coloured ceramic coated film and can be used for preparing lithium ion battery separator and the lithium ion battery containing this film.
Description
Technical field
The invention belongs to lithium ion battery separator Material Fields, and in particular to a kind of coloured ceramics painting of aramid fiber polymeric compound coating
Overlay film and preparation method thereof.
Background technology
In recent years, lithium ion battery will be used wider and wider, therefore the requirement to lithium ion battery is also higher and higher,
Taking place frequently for the safety accident of lithium ion battery causes everybody to safety issue extensive concern, and inside battery once occurs similar short
The problems such as road, then easily causes security risk.In lithium ion battery, diaphragm is its important component part, in addition to for lithium ion
It is mobile that channel is provided, the effect of barrier positive and negative anodes is also functioned to, to provide safeguard for the safety of battery, with to lithium battery safety
Property pay attention to day by day, also improves the performance requirement of diaphragm.
Conventional lithium ion battery separator is polyalkene diaphragm currently on the market, its main feature is that high mechanical strength, chemistry is steady
It is qualitative it is good, production cost is low etc., but disadvantage is that high temperature resistance is poor, it is bad to electrolyte wellability the problems such as,
For this purpose, researcher improves diaphragm safety and cycle performance to polyalkene diaphragm by way of coating.Go out currently on the market
Ceramic coated polyalkene diaphragm is showed, PVDF coats the new products such as polyalkene diaphragm, although ceramic coating membrane high temperature resistance
Well, but since ceramic inorganic material is poor to the cohesive force of base material, the uniformity of shedding phenomenon and coat is caused to ask
Topic, to battery, that the safety is improved is insufficient during military service, can also reduce the cycle performance of battery.PVDF coats the electricity of diaphragm
It solves liquid wellability and increases to the caking property of electrode, but since pore-forming condition is more demanding to humidity, easily lead to hole
Uneven or even compacted zone occurs, and negatively influencing is generated to the performance of battery.
Invention content
The present invention provides coloured ceramic coated film of a kind of aramid fiber polymeric compound coating and preparation method thereof, can effectively solve the problem that pottery
The phenomenon that porcelain coating film ceramic particle shedding, can effectively improve with pole plate caking property, high temperature resistance etc..
In order to solve the above technical problem, the present invention provides a kind of aramid fiber polymeric compounds to be coated with coloured ceramic coated film, institute
State coating film include base material MIcroporous polyolefin film, MIcroporous polyolefin film one or both sides surface coloured ceramic coating layer and
The aramid fiber coating layer on the coloured ceramic coating one or both sides surface.
Preferably, the coloured ceramic coating layer is coated in polyolefin base material for coloured ceramic slurry, after drying
It obtains, the composition and mass percentage of the coloured ceramic slurry are as follows：
Ceramic inorganic particle 10-70%,
Nano-level pigment 0.5-5%,
Adhesive 0.05-25%,
Dispersant 0.05-15%,
Wetting agent 0.001-5%,
Water 25-85%.
Preferably, the aramid fiber polymeric compound coating layer is obtained by aramid fiber casting solution after coated, coagulating bath, water-bath, drying
, the composition and mass percentage of the aramid fiber casting solution are as follows：
Aramid fiber condensate 1-6%,
Pore former 5-12%,
Organic solvent 72-94%.
Preferably, the ceramic inorganic particle includes silica, alundum (Al2O3), calcium oxide, titanium dioxide, oxidation
The particle size range of one or more of magnesium, zinc oxide, stannic oxide and zirconium dioxide, the ceramic inorganic particle is 0.01
μm-10μm；The nano-level pigment is using the excellent phthalocyanine blue of temperature tolerance, peacock blue, cobalt blue, vanadium zirconium indigo plant, zinc titan yellow and ferrozirconium
One or more in red, the adhesive includes sodium cellulose glycolate, cinnamic acid, polyacrylamide, polyvinyl alcohol, gathers
It is one or more in vinylpyrrolidone, polyurethane, polyethylene oxide and polyethylene glycol oxide；The dispersant is aqueous dispersion
Agent, including polyethylene glycol, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether ammonium sulfate, alkyl polyoxyethylene ether, alkyl sulfonic acid
One or more in salt and lignosulfonates, the wetting agent includes polyoxyethylated alkyl phenol, polyoxyethylene fatty alcohol
It is one or more in ether and silanol class.
Preferably, the aramid fiber polymeric compound is poly and poly(p-phenylene terephthalamide),
Its molecular weight is 5000-300000Da；The organic solvent DMAC N,N' dimethyl acetamide, N- methyl pyrrolidones, N, N- diformazans
Any one in base formamide dimethyl sulfoxide (DMSO) or repefral, the pore former includes inorganic or organic pore-forming
One or two kinds of in agent, the Inorganic pore forming agents include one kind in lithium chloride, magnesium chloride, calcium chloride, calcium carbonate and calcium chloride
Or it is several, the organic pore former includes methanol, ethyl alcohol, propyl alcohol, glycerine, polyethylene glycol, acetone, acetic acid, tetrahydrofuran, gathers
One or more of vinylpyrrolidone, ethyl acetate and petroleum ether.
Preferably, the polyolefin base material microporous barrier is the polyalkene diaphragm of 5-40 μm of thickness, porosity 30-80%,
Including in poly- PE lithium battery diaphragms, PP lithium battery diaphragms or three layers comprising PP/PE/PP or MULTILAYER COMPOSITE lithium battery diaphragm
It is a kind of.
Preferably, the coloured ceramic coated layer thickness is 1-10 μm；The aramid fiber coating layer thickness at 0.5-10 μm,
Porosity is 50-80%.
The present invention also provides the preparation methods that a kind of aramid fiber polymeric compound is coated with coloured ceramic coated film, including following step
Suddenly：
The preparation of coloured ceramic coating layer：
It weighs ceramic inorganic particle, nano-level pigment, adhesive, dispersant, wetting agent to mix with aqueous solvent, fully stir
It mixes, obtains color uniformly coloured ceramic slurry；
By above-mentioned coloured ceramic slurry in room temperature in vacuo or at being heated to 50 DEG C -80 DEG C standing and defoaming 10-120min, wait for gas
It after bubble completely disappears, is poured in polyolefin base membrane, coating, knifing, and the dry 20-120min at 40 DEG C -80 DEG C, obtains
Coloured ceramic coating layer；
Aramid fiber polymeric compound is coated with the preparation of coloured ceramic coated film：
Weigh aramid fiber, pore former is mixed with organic solvent, is sufficiently stirred at 50 DEG C -80 DEG C, obtain the virtue of homogeneous transparent
Synthetic fibre condensate casting solution；
By above-mentioned casting solution room temperature in vacuo or it is heated to standing and defoaming 10-120min at 50 DEG C -80 DEG C, gas waits for that bubble is complete
It after totally disappeared mistake, is poured in polyolefin base membrane, stands 5s-60s in air, be put into coagulating bath after coating knifing and handle 30s-
10min is immersed in the water 30s-120min after taking out the film, dry, obtains aramid fiber polymeric compound and is coated with coloured ceramic coated film.
Preferably, the coagulating bath is the mixture of solvent and non-solvent, wherein non-solvent is water, solvent N, N-
One in dimethylacetylamide, N-Methyl pyrrolidone, N,N-dimethylformamide dimethyl sulfoxide (DMSO) and repefral
Kind is several, and the concentration of volume percent of non-solvent is 10-90% in the coagulating bath.
Preferably, the environment temperature of the coagulating bath is 30-70 DEG C, relative humidity 60-95%, the drying temperature of film
It is 40-80 DEG C, drying time 20min-120min.
Compared with prior art, advantage possessed by the present invention is：
1, heat-resisting quantity：Ceramic particle and aramid fiber material belong to heat-resisting material, and thermal runaway temperature occurs in inside battery
Degree increases, and when polyalkene diaphragm closed pore melts, ceramics and aramid fiber coating can keep membrane shape well, 130 DEG C, 1h conditions
Under, the directions TD promote the directions 98.3%, MD and promote 86.2%, play the role of that positive and negative anodes are isolated, greatly improve the safety of battery
Performance；
2, aramid fiber coat in surface layer has good wellability to electrolyte and is improved to electrode adhesion power, can improve electricity
The cycle performance in pond, in addition, the presence of aramid fiber coating is it is possible to prevente effectively from ceramic layer shedding phenomenon；
3, existing coating film color is single, and the coating effect of coating is not easy to detect after diaphragm coating, using ceramic slurry
Coloring can be solved the problem.Preparation process of the present invention is simple, and condition is easily-controllable, is suitable for batch production.
Description of the drawings
Fig. 1 is that aramid fiber polymeric compound provided in an embodiment of the present invention is coated with ceramic coated basement membrane section in coloured ceramic coated film
Pattern SEM figures；
Fig. 2 is that aramid fiber polymeric compound provided in an embodiment of the present invention is coated with coloured ceramic coated environmental microbes SEM figures.
Specific implementation mode
Below by technical solution aramid fiber polymeric compound provided in an embodiment of the present invention being coated in coloured ceramic coated film into
Row clearly and completely describes, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
Every other embodiment, shall fall within the protection scope of the present invention.
Embodiment 1
20g dispersants are added in 345g water, after being completely dissolved, 5g wetting agents are added, 100g ceramic particles are then added
With 10g dyestuffs, after quick stirring and dissolving, adds 20g adhesives and obtained a concentration of after stirring to uniformly mixed slurry
The ceramic slurry of 20wt%.The slurry configured is poured on 12 μm of polyethylene diagrams base materials of thickness, after being coated with knifing, directly
Dry 2h at 70 DEG C, removes solvent in drying box, obtains coloured ceramic coating membrane, and Fig. 1 is the coating basement membrane cross-section morphology
SEM schemes.
By 2g aramid fibers, 10g pore formers, 88g n,N-dimethylacetamide (DMAc) is mixed, the machine in 80 DEG C of oil baths
Tool stirring 6h is until obtain the casting solution of homogeneous transparent, a concentration of 2wt% of aramid fiber.The aramid fiber casting solution configured is poured over
It states on film, after being coated with knifing, is placed in plasticizing-bath and is formed a film by L-S phase inversion methods, is then immersed in water-bath, washed away remaining
Pore former, dry 2h at 60 DEG C, obtains aramid fiber polymeric compound and is coated with coloured ceramic coated lithium ion battery separator in drying box,
Fig. 2 is coating environmental microbes SEM figures.
Embodiment 2
25g dispersants are added in 310g water, after being completely dissolved, 5g wetting agents are added, 125g ceramic particles are then added
With 10g dyestuffs, after quick stirring and dissolving, adds 25g adhesives and obtained a concentration of after stirring to uniformly mixed slurry
The ceramic slurry of 25wt%.The slurry configured is poured on 12 μm of polyethylene diagrams base materials of thickness, after being coated with knifing, directly
It is connected in drying box at 70 DEG C dry 2h, solvent is removed, obtains coloured ceramic coating membrane.
By 2g aramid fibers, 10g pore formers, 88g n,N-dimethylacetamide (DMAc) is mixed, the machine in 80 DEG C of oil baths
Tool stirring 6h is until obtain the casting solution of homogeneous transparent, a concentration of 2wt% of aramid fiber.The aramid fiber casting solution configured is poured over
It states on film, after being coated with knifing, is placed in plasticizing-bath and is formed a film by L-S phase inversion methods, is then immersed in water-bath, washed away remaining
Pore former, dry 2h at 60 DEG C, obtains aramid fiber polymeric compound and is coated with coloured ceramic coated lithium ion battery separator in drying box.
Embodiment 3
20g dispersants are added in 345g water, after being completely dissolved, 5g wetting agents are added, 100g ceramic particles are then added
With 10g dyestuffs, after quick stirring and dissolving, adds 20g adhesives and obtained a concentration of after stirring to uniformly mixed slurry
The ceramic slurry of 20wt%.The slurry configured is poured on 12 μm of polyethylene diagrams base materials of thickness, after being coated with knifing, directly
It is connected in drying box at 70 DEG C dry 2h, solvent is removed, obtains coloured ceramic coating membrane.
By 4g aramid fibers, 10g pore formers, 86g n,N-dimethylacetamide (DMAc) is mixed, the machine in 80 DEG C of oil baths
Tool stirring 6h is until obtain the casting solution of homogeneous transparent, a concentration of 4wt% of aramid fiber.The aramid fiber casting solution configured is poured over
It states on film, after being coated with knifing, is placed in plasticizing-bath and is formed a film by L-S phase inversion methods, is then immersed in water-bath, washed away remaining
Pore former, dry 2h at 60 DEG C, obtains aramid fiber polymeric compound and is coated with coloured ceramic coated lithium ion battery separator in drying box.
Embodiment 4
25g dispersants are added in 310g water, after being completely dissolved, 5g wetting agents are added, 125g ceramic particles are then added
With 10g dyestuffs, after quick stirring and dissolving, adds 25g adhesives and obtained a concentration of after stirring to uniformly mixed slurry
The ceramic slurry of 25wt%.The slurry configured is poured on 12 μm of polyethylene diagrams base materials of thickness, after being coated with knifing, directly
It is connected in drying box at 70 DEG C dry 2h, solvent is removed, obtains coloured ceramic coating membrane.
By 4g aramid fibers, 10g pore formers, 86g n,N-dimethylacetamide (DMAc) is mixed, the machine in 80 DEG C of oil baths
Tool stirring 6h is until obtain the casting solution of homogeneous transparent, a concentration of 4wt% of aramid fiber.The aramid fiber casting solution configured is poured over
It states on film, after being coated with knifing, is placed in plasticizing-bath and is formed a film by L-S phase inversion methods, is then immersed in water-bath, washed away remaining
Pore former, dry 2h at 60 DEG C, obtains aramid fiber polymeric compound and is coated with coloured ceramic coated lithium ion battery separator in drying box.
Embodiment 5
25g dispersants are added in 285g water, after being completely dissolved, 5g wetting agents are added, 150g ceramic particles are then added
With 10g dyestuffs, after quick stirring and dissolving, adds 25g adhesives and obtained a concentration of after stirring to uniformly mixed slurry
The ceramic slurry of 30wt%.The slurry configured is poured on 12 μm of polyethylene diagrams base materials of thickness, after being coated with knifing, directly
It is connected in drying box at 70 DEG C dry 2h, solvent is removed, obtains coloured ceramic coating membrane.
By 4g aramid fibers, 10g pore formers, 86g n,N-dimethylacetamide (DMAc) is mixed, the machine in 80 DEG C of oil baths
Tool stirring 6h is until obtain the casting solution of homogeneous transparent, a concentration of 4wt% of aramid fiber.The aramid fiber casting solution configured is poured over
It states on film, after being coated with knifing, is placed in plasticizing-bath and is formed a film by L-S phase inversion methods, is then immersed in water-bath, washed away remaining
Pore former, dry 2h at 60 DEG C, obtains aramid fiber polymeric compound and is coated with coloured ceramic coated lithium ion battery separator in drying box.
Embodiment 6
25g dispersants are added in 260g water, after being completely dissolved, 5g wetting agents are added, 175g ceramic particles are then added
With 10g dyestuffs, after quick stirring and dissolving, adds 25g adhesives and obtained a concentration of after stirring to uniformly mixed slurry
The ceramic slurry of 35wt%.The slurry configured is poured on 12 μm of polyethylene diagrams base materials of thickness, after being coated with knifing, directly
It is connected in drying box at 70 DEG C dry 2h, solvent is removed, obtains coloured ceramic coating membrane.
By 4g aramid fibers, 10g pore formers, 86g n,N-dimethylacetamide (DMAc) is mixed, the machine in 80 DEG C of oil baths
Tool stirring 6h is until obtain the casting solution of homogeneous transparent, a concentration of 4wt% of aramid fiber.The aramid fiber casting solution configured is poured over
It states on film, after being coated with knifing, is placed in plasticizing-bath and is formed a film by L-S phase inversion methods, is then immersed in water-bath, washed away remaining
Pore former, dry 2h at 60 DEG C, obtains aramid fiber polymeric compound and is coated with coloured ceramic coated lithium ion battery separator in drying box.
Comparative example 1
The diaphragm obtained in 12 μm of polyethylene diagrams base materials of thickness and embodiment 1-6 is subjected to thickness under the same conditions
The performance tests such as degree, mechanical strength, ventilative value, thermal contraction.
Comparative example 2
25g dispersants are added in 260g water, after being completely dissolved, 5g wetting agents are added, 175g ceramic particles are then added
With 10g dyestuffs, after quick stirring and dissolving, adds 25g adhesives and obtained a concentration of after stirring to uniformly mixed slurry
The ceramic slurry of 35wt%.The slurry configured is poured on 12 μm of polyethylene diagrams base materials of thickness, after being coated with knifing, directly
It is connected in drying box at 70 DEG C dry 2h, solvent is removed, obtains coloured ceramic coating membrane.The diaphragm obtained with embodiment 1-6
Thickness is carried out under the same conditions, mechanical strength, ventilative value, is heat-shrinked the performance tests such as situation.
Comparative example 3
By 4g aramid fibers, 10g pore formers, 86g n,N-dimethylacetamide (DMAc) is mixed, the machine in 80 DEG C of oil baths
Tool stirring 6h is until obtain the casting solution of homogeneous transparent, a concentration of 4wt% of aramid fiber.The aramid fiber casting solution configured is poured over thickness
It spends on 12 μm of polyethylene diagrams base materials, after being coated with knifing, is placed in plasticizing-bath and is formed a film by L-S phase inversion methods, be then immersed in water
In bath, remaining pore former is washed away, dry 2h at 60 DEG C, obtains aramid fiber polymeric compound coating polyethylene lithium-ion electric in drying box
Pond diaphragm.The diaphragm obtained with embodiment 1-6 carries out thickness, mechanical strength, ventilative value, is heat-shrinked situation under the same conditions
Equal performance tests.
Table 1：The aramid fiber polymeric compound of the present invention is coated with coloured ceramic coated lithium ion battery separator the performance test results comparison
Situation
Found out by 1 test result of table, 6 aramid fiber polymeric compound of embodiment 1- embodiments is coated with coloured ceramic coated lithium ion battery
Diaphragm coating layer thickness increases 3.8-4.1 μm compared to polyethylene based film, ceramic coated polyethylene in comparative example 2- comparative examples 3
Diaphragm and aramid fiber coating polyethylene diaphragm coating layer thickness have increased separately 2.4 μm and 2.2 μm compared to polyethylene based film.Compared to
1 polyethylene based film of comparative example, the tensile strength and puncture strength of embodiment 1- embodiments 6 are obviously improved, and value of breathing freely is in 230.3-
255.4s/in2Compared with comparative example 2- comparative examples 3 within the scope of 1.22 Kpa of ﹒ 100cc ﹒, tensile strength, puncture strength and thoroughly
Gas value has a degree of improvement.Embodiment 1- embodiments 6, the thermal contraction of comparative example 2- comparative examples 3 at different temperatures with
The comparison of polyethylene based film test result shows that aramid fiber and ceramic material have good high temperature resistance, hence it is evident that it is poly- to be better than comparative example 1
Vinyl film and comparative example 3 carry the lithium ion battery separator of aramid fiber coating.
Claims (10)
1. a kind of aramid fiber polymeric compound is coated with coloured ceramic coated film, which is characterized in that the coating film includes that base material polyolefin is micro-
Pore membrane, the coloured ceramic coating layer on MIcroporous polyolefin film one or both sides surface and the coloured ceramic coating side or two
The aramid fiber coating layer of side surface.
2. aramid fiber polymeric compound according to claim 1 is coated with coloured ceramic coated film, which is characterized in that the coloured ceramics
Coat be coloured ceramic slurry it is coated in polyolefin base material, drying after obtain, the composition of the coloured ceramic slurry and
Mass percentage is as follows：
Ceramic inorganic particle 10-70%,
Nano-level pigment 0.5-5%,
Adhesive 0.05-25%,
Dispersant 0.05-15%,
Wetting agent 0.001-5%,
Water 25-85%.
3. aramid fiber polymeric compound according to claim 1 is coated with coloured ceramic coated film, which is characterized in that the aramid fiber polymerization
Object coating layer is obtained by aramid fiber casting solution after coated, coagulating bath, water-bath, drying, the composition and quality of the aramid fiber casting solution
Percentage composition is as follows：
Aramid fiber condensate 1-6%,
Pore former 5-12%,
Organic solvent 72-94%.
4. aramid fiber polymeric compound according to claim 2 is coated with coloured ceramic coated film, which is characterized in that the ceramic inorganic
Particle includes silica, alundum (Al2O3), calcium oxide, titanium dioxide, magnesia, zinc oxide, stannic oxide and zirconium dioxide
One or more of, the particle size range of the ceramic inorganic particle is 0.01 μm -10 μm；The nano-level pigment is using resistance to
One or more, the adhesive packet in the excellent phthalocyanine blue of warm nature, peacock blue, cobalt blue, vanadium zirconium indigo plant, zinc titan yellow and zirconium iron pink
Include sodium cellulose glycolate, cinnamic acid, polyacrylamide, polyvinyl alcohol, polyvinylpyrrolidone, polyurethane, polycyclic oxygen second
It is one or more in alkane and polyethylene glycol oxide；The dispersant is aqueous dispersion, including polyethylene glycol, polyvinylpyrrolidine
One kind or more in ketone, fatty alcohol polyoxyethylene ether ammonium sulfate, alkyl polyoxyethylene ether, alkylsulfonate and lignosulfonates
Kind, the wetting agent includes one or more in polyoxyethylated alkyl phenol, polyoxyethylene aliphatic alcohol ether and silanol class.
5. aramid fiber polymeric compound according to claim 3 is coated with coloured ceramic coated film, which is characterized in that the aramid fiber polymerization
Object is poly and poly(p-phenylene terephthalamide), molecular weight 5000-300000Da；It is described to have
Solvent DMAC N,N' dimethyl acetamide, N-Methyl pyrrolidone, N,N-dimethylformamide dimethyl sulfoxide (DMSO) or phthalic acid
Any one in dimethyl ester, the pore former is one or two kinds of in including inorganic or organic pore former, the Inorganic pore forming agents
Including one or more of lithium chloride, magnesium chloride, calcium chloride, calcium carbonate and calcium chloride, the organic pore former include methanol,
Ethyl alcohol, propyl alcohol, glycerine, polyethylene glycol, acetone, acetic acid, tetrahydrofuran, polyvinylpyrrolidone, ethyl acetate and petroleum ether
One or more of.
6. being coated with coloured ceramic coated film according to claim 1-5 any one of them aramid fiber polymeric compounds, which is characterized in that described
Polyolefin base material microporous barrier is the polyalkene diaphragm of 5-40 μm of thickness, porosity 30-80%, including poly- PE lithium battery diaphragms, PP
One kind in lithium battery diaphragm or three layers comprising PP/PE/PP or MULTILAYER COMPOSITE lithium battery diaphragm.
7. being coated with coloured ceramic coated film according to claim 1-5 any one of them aramid fiber polymeric compounds, which is characterized in that described
Coloured ceramic coated layer thickness is 1-10 μm；The aramid fiber coating layer thickness is at 0.5-10 μm, porosity 50-80%.
8. the preparation method of coloured ceramic coated film is coated with according to claim 1-7 any one of them aramid fiber polymeric compounds, it is special
Sign is, includes the following steps：
The preparation of coloured ceramic coating layer：
It weighs ceramic inorganic particle, nano-level pigment, adhesive, dispersant, wetting agent to mix with aqueous solvent, is sufficiently stirred, obtains
To the uniform coloured ceramic slurry of color；
By above-mentioned coloured ceramic slurry in room temperature in vacuo or at being heated to 50 DEG C -80 DEG C standing and defoaming 10-120min, wait for that bubble is complete
It after totally disappeared mistake, is poured in polyolefin base membrane, coating, knifing, and the dry 20-120min at 40 DEG C -80 DEG C, obtains coloured pottery
Porcelain coat；
Aramid fiber polymeric compound is coated with the preparation of coloured ceramic coated film：
Weigh aramid fiber, pore former is mixed with organic solvent, is sufficiently stirred at 50 DEG C -80 DEG C, the aramid fiber for obtaining homogeneous transparent is poly-
Fit casting solution；
By above-mentioned casting solution room temperature in vacuo or it is heated to standing and defoaming 10-120min at 50 DEG C -80 DEG C, gas waits for that bubble completely disappears
Afterwards, it is poured in polyolefin base membrane, stands 5s-60s in air, be put into coagulating bath after coating knifing and handle 30s-10min,
It is immersed in the water 30s-120min after taking out the film, it is dry, it obtains aramid fiber polymeric compound and is coated with coloured ceramic coated film.
9. preparation method according to claim 8, which is characterized in that the coagulating bath is the mixing of solvent and non-solvent
Object, wherein non-solvent is water, and solvent is n,N-dimethylacetamide, N-Methyl pyrrolidone, n,N-Dimethylformamide diformazan
One or more of in base sulfoxide and repefral, the concentration of volume percent of non-solvent is 10- in the coagulating bath
90%.
10. preparation method according to claim 8, which is characterized in that the environment temperature of the coagulating bath is 30-70 DEG C,
Relative humidity is 60-95%, and the drying temperature of film is 40-80 DEG C, drying time 20min-120min.
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| CN109786623A (en) * | 2018-12-29 | 2019-05-21 | 深圳中兴新材技术股份有限公司 | Improve the method and polymer coating diaphragm of polymer coating diaphragm ionic conductivity |
| CN110444718A (en) * | 2019-08-15 | 2019-11-12 | 宁德卓高新材料科技有限公司 | The preparation method of Ceramic Composite diaphragm with high-adhesion polymer coating film |
| CN110828757A (en) * | 2019-11-20 | 2020-02-21 | 江苏塔菲尔新能源科技股份有限公司 | Lithium ion battery diaphragm and preparation method and application thereof |
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| CN111509168B (en) * | 2019-01-31 | 2023-02-17 | 青岛蓝科途膜材料有限公司 | Lithium ion battery diaphragm with high-temperature-resistant coating and preparation method thereof |
| CN111509168A (en) * | 2019-01-31 | 2020-08-07 | 青岛蓝科途膜材料有限公司 | Lithium ion battery diaphragm with high-temperature-resistant coating and preparation method thereof |
| CN113646940A (en) * | 2019-03-19 | 2021-11-12 | 株式会社Lg新能源 | Solid electrolyte membrane, method for producing same, and method for selecting solid electrolyte membrane |
| CN111584797A (en) * | 2019-07-16 | 2020-08-25 | 河北金力新能源科技股份有限公司 | Preparation method and application of non-woven fabric coated diaphragm |
| CN110444718A (en) * | 2019-08-15 | 2019-11-12 | 宁德卓高新材料科技有限公司 | The preparation method of Ceramic Composite diaphragm with high-adhesion polymer coating film |
| CN112625235A (en) * | 2019-09-20 | 2021-04-09 | 青岛蓝科途膜材料有限公司 | Para-aramid polymer, lithium battery diaphragm, preparation method and lithium battery |
| CN112625235B (en) * | 2019-09-20 | 2024-03-15 | 青岛蓝科途膜材料有限公司 | Para-aramid polymer, lithium battery diaphragm, preparation method and lithium battery |
| CN110828757A (en) * | 2019-11-20 | 2020-02-21 | 江苏塔菲尔新能源科技股份有限公司 | Lithium ion battery diaphragm and preparation method and application thereof |
| CN111234224A (en) * | 2020-01-16 | 2020-06-05 | 青岛蓝科途膜材料有限公司 | Modified aramid polymer with polyimide structure, aramid film casting liquid, lithium battery diaphragm, preparation method of lithium battery diaphragm and lithium battery |
| CN111341998A (en) * | 2020-03-09 | 2020-06-26 | 天津市捷威动力工业有限公司 | Pole piece containing coloring insulating coating and lithium ion battery |
| CN111341998B (en) * | 2020-03-09 | 2023-06-02 | 天津市捷威动力工业有限公司 | Pole piece containing coloring insulating coating and lithium ion battery |
| CN113540691A (en) * | 2020-03-31 | 2021-10-22 | 比亚迪股份有限公司 | Lithium ion battery diaphragm, preparation method thereof and lithium ion battery |
| CN112366425A (en) * | 2020-11-20 | 2021-02-12 | 江苏厚生新能源科技有限公司 | Leakage-proof blue-coated ceramic coating film and preparation method thereof |
| CN112366425B (en) * | 2020-11-20 | 2022-06-17 | 江苏厚生新能源科技有限公司 | Leakage-proof blue-coated ceramic coating film and preparation method thereof |
| CN113161684A (en) * | 2021-03-18 | 2021-07-23 | 河北金力新能源科技股份有限公司 | High-temperature-resistant and high-strength diaphragm and preparation method thereof |
| CN113471627A (en) * | 2021-05-21 | 2021-10-01 | 惠州锂威新能源科技有限公司 | Modified diaphragm and preparation method and application thereof |
| CN113594628A (en) * | 2021-07-01 | 2021-11-02 | 华中科技大学 | Nano-material-loaded aramid fiber coated battery diaphragm, preparation method and lithium-sulfur battery |
| CN113506950A (en) * | 2021-07-09 | 2021-10-15 | 陕西科技大学 | Preparation method of pore-foaming agent regulated and controlled micro-nano porous structure aramid fiber nanofiber-based battery diaphragm |
| WO2023011293A1 (en) * | 2021-07-31 | 2023-02-09 | 华为技术有限公司 | Composite separator, electrochemical apparatus, electronic device, and mobile terminal |
| CN115332726A (en) * | 2022-08-30 | 2022-11-11 | 江苏厚生新能源科技有限公司 | High-temperature-resistant and water-resistant coating diaphragm and preparation method thereof |
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