WO2023284619A1 - Bouillie de revêtement, film de revêtement résistant aux hautes températures et son procédé de préparation, et dispositif électrochimique - Google Patents

Bouillie de revêtement, film de revêtement résistant aux hautes températures et son procédé de préparation, et dispositif électrochimique Download PDF

Info

Publication number
WO2023284619A1
WO2023284619A1 PCT/CN2022/104368 CN2022104368W WO2023284619A1 WO 2023284619 A1 WO2023284619 A1 WO 2023284619A1 CN 2022104368 W CN2022104368 W CN 2022104368W WO 2023284619 A1 WO2023284619 A1 WO 2023284619A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating film
resistant coating
temperature resistant
coating
high temperature
Prior art date
Application number
PCT/CN2022/104368
Other languages
English (en)
Chinese (zh)
Inventor
庄志
石广钦
熊磊
刘连静
晏小祥
虞少波
程跃
Original Assignee
苏州捷力新能源材料有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州捷力新能源材料有限公司 filed Critical 苏州捷力新能源材料有限公司
Publication of WO2023284619A1 publication Critical patent/WO2023284619A1/fr

Links

Classifications

    • 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
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • H01M50/417—Polyolefins
    • 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
    • H01M50/403—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
    • 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
    • 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

Definitions

  • the application relates to the field of battery separators, in particular to a coating slurry, a high-temperature-resistant coating film, a preparation method thereof, and an electrochemical device.
  • the diaphragm is an important part of the lithium-ion battery.
  • the diaphragm has two main functions. The first is electronic insulation, which ensures the electronic insulation between the positive and negative electrodes of the lithium-ion battery and prevents short circuits.
  • the second function is to conduct ions.
  • the electrolyte can penetrate into the porous structure of the diaphragm, so that ions can pass through the diaphragm to achieve ion conduction.
  • the separator is one of the key inner components.
  • the performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the battery capacity, cycle and safety performance. It can be said that the separator with excellent performance plays a decisive role in improving the overall performance of the battery.
  • the performance requirements for separators are getting higher and higher.
  • the base film and coating are required to be light and thin, and the viscous coating is used to increase the volumetric energy density of the cell; in terms of long life, it is necessary to enhance the liquid retention and wettability of the separator, improve the lithium ion conductivity, and increase the battery capacity.
  • the temperature range from the closed cell temperature of the battery separator to the rupture temperature is a safe range for the battery to withstand high temperatures.
  • the larger the temperature range the higher the safety factor when the battery is affected by high temperature. Therefore, reducing the closed cell temperature and increasing the membrane rupture temperature are crucial to improving the overall safety performance of the battery.
  • high-safety diaphragms are generally realized by technical means such as PE/PP multilayer composite diaphragms and high heat-resistant ceramics. PP/PE multi-layer co-extrusion is used to prepare composite diaphragms.
  • a layer of ceramic coating can be formed on the surface of the diaphragm, which can effectively improve the high-temperature dimensional stability of the diaphragm, but the rupture temperature of the diaphragm depends on the coated base film, and the ceramic coating has basically no effect on the rupture temperature of the entire diaphragm.
  • ceramic coating can improve the overall high temperature resistance and dimensional stability, when the temperature is too high, even if the ceramic coating can maintain the membrane structure, the base film layer will be broken, which will lead to the disappearance of the closed cell effect.
  • Patents CN201310111465.X and CN201610786396.6 provide methods for manufacturing high-temperature-resistant diaphragms, but they are all improved by low-closed-cell temperature coatings on high-temperature-resistant non-woven fabric base films.
  • the present application expects to provide a coating slurry, a high-temperature-resistant coating film, a preparation method thereof, and an electrochemical device to improve or solve the above-mentioned technical problems.
  • the purpose of the present application is to provide a coating slurry, including the following components in mass percentage: 0.01% to 5% of ultraviolet photoinitiator, 0.01% to 5% of ultraviolet light crosslinking agent, 0% to 5% of deionized water 50%, polymer emulsion 0-90%, binder 0-10%, dispersant 0-5%, organic solvent 5-70%.
  • the coating slurry includes the following components in mass percentage: 0.01-2% of ultraviolet light initiator, 0.7-3.5% of ultraviolet light crosslinking agent, 0-50% of deionized water, and 0-83% of polymer emulsion , binder 0-4.5%, dispersant 0-1.5%, organic solvent 8-58%.
  • the organic solvent is an organic solvent that can be miscible with water in any proportion.
  • the ultraviolet photoinitiator is a cationic photoinitiator or a free radical photoinitiator.
  • the ultraviolet light crosslinking agent is an allyl auxiliary crosslinking agent.
  • allyl-based auxiliary crosslinking agent is selected from the following one or a mixture of two or more: trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, cyanuric acid Triacrylate and triallyl isocyanurate.
  • polymer emulsion is polyolefin emulsion, acrylate and its derivative emulsion.
  • the polymer emulsion has a solid content of 10% to 70%, wherein the size of the solid particles is 0.5 ⁇ m ⁇ D(50) ⁇ 5 ⁇ m.
  • the size of the solid particles is 0.5 ⁇ m ⁇ D(50) ⁇ 2.5 ⁇ m.
  • the size of the solid particles is 0.6 ⁇ m ⁇ D(50) ⁇ 1.5 ⁇ m.
  • the size of the solid particles is 1 ⁇ m ⁇ D(50) ⁇ 1.5 ⁇ m.
  • the melting point of the solid particles is 60-160°C.
  • the solid particles have a melting point of 80-135°C. More preferably, it is 80-120 degreeC, More preferably, it is 110-120 degreeC, More preferably, it is 80-90 degreeC.
  • the binding agent is selected from one or more of polyacrylate and its derivatives, polyvinyl alcohol and its derivatives, and polyvinyl acetate.
  • the dispersant is an anionic surfactant or a cationic surfactant.
  • the dispersant is a water-soluble surfactant.
  • the object of the present application is also to provide a high temperature resistant coating film, including: a substrate and a coating disposed on at least one surface of the substrate; the coating is formed from the coating slurry provided in the first aspect It is cross-linked and cured under ultraviolet light irradiation.
  • the base material is a polyolefin diaphragm or a polyolefin diaphragm containing a ceramic coating.
  • the polyolefin in the polyolefin separator or the polyolefin separator containing a ceramic coating is one or a mixture of two or more of the following crystalline polymers: polyethylene, polypropylene, poly-1-butene, poly 4-methyl-1-pentene, poly-1-hexene, poly-1-octene or polymethylmethacrylate.
  • the thickness of the high temperature resistant coating film is 9-18 ⁇ m
  • the air permeability is 144-230s/100ml
  • the acupuncture strength is 472-616gf
  • the closed cell temperature is 95-143°C
  • the membrane rupture temperature is 172-216°C
  • the safety range is 35-91°C .
  • the thickness is 9-18 ⁇ m
  • the air permeability is 176-230s/100ml
  • the acupuncture strength is 473-509gf
  • the closed cell temperature is 95-141°C
  • the membrane rupture temperature is 172-216°C
  • the safe range is 35-91°C.
  • the thickness is 9-13 ⁇ m
  • the air permeability is 176-206 s/100ml
  • the acupuncture strength is 473-509 gf
  • the closed cell temperature is 140-142°C
  • the membrane rupture temperature is 176-216°C
  • the safety range is 35-75°C.
  • the thickness is 9-18 ⁇ m
  • the air permeability is 152-230 s/100ml
  • the closed cell temperature is 95-121°C
  • the membrane rupture temperature is 172-187°C
  • the safety range is 50-91°C.
  • the purpose of the present application is also to provide a method for preparing a high temperature resistant coating film, comprising the following steps:
  • the components of the slurry in step 1) are preferably 0.1-2% of ultraviolet light initiator, 0.7-3.5% of ultraviolet light crosslinking agent, 0-50% of deionized water, 0-83% of polymer emulsion, viscose Binder 0-4.5%, dispersant 0-1.5%, organic solvent 8-58%.
  • organic solvent is miscible with deionized water in any proportion.
  • the organic solvent is selected from one or a mixture of two or more of ethanol, acetone, isopropanol, dimethylformamide, N,N-dimethylformamide and dimethyl sulfoxide.
  • the polymer emulsion is polyolefin emulsion, acrylate and its derivative emulsion; the solid content of the polymer emulsion is 10%-70%, and the size of the solid particles is 0.5 ⁇ m ⁇ D(50) ⁇ 5 ⁇ m.
  • the melting point of the solid particles is 60-160°C.
  • the specific process of ultraviolet light irradiation includes: using ultraviolet light in the wavelength range of 254-365nm to irradiate the uncrosslinked isolation film for 6-10 minutes, so as to obtain a high-temperature resistant coating film.
  • the purpose of this application is to provide an electrochemical device, including a positive electrode, a negative electrode, an electrolyte and a coating film; the coating film includes the high temperature resistant coating film provided in the second aspect, or, according to the third aspect provided The high temperature resistant coating film prepared by the preparation method of the high temperature resistant coating film.
  • the application provides a high-temperature-resistant coating film, which is coated on at least one side of the substrate with a specially formulated coating slurry.
  • the high-temperature-resistant coating film provided by the application has comparable physical and chemical properties , and has quite or very low closed cell temperature and high membrane rupture temperature.
  • the high temperature resistant coating film of this application has excellent thermal properties and has a large safety range. When it is used in batteries, it can prevent overheating and short circuit of batteries , effectively guarantee the safety of battery machinery and high-temperature abuse scenarios, and the overall safety factor of the battery has been greatly improved.
  • the specific embodiment of the application provides a method for preparing a high temperature resistant coating film, comprising the following steps:
  • the ultraviolet photoinitiator is a cationic photoinitiator or a free radical photoinitiator.
  • the ultraviolet photoinitiator is preferably selected from benzoin, benzoin dimethyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, diphenyl ethyl ketone, ⁇ , ⁇ -dimethoxy- ⁇ -phenylphenethyl Ketone, ⁇ , ⁇ -diethoxyacetophenone, ⁇ -hydroxyalkylphenone, ⁇ -aminoalkylphenone, aroylphosphine oxide, bisbenzoylphenylphosphine oxide, benzophenone, 2,4-dihydroxybenzophenone, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, Michler's ketone, thiopropoxythioxanthone, isopropyl A combination of one or more of thioxanthone, diaryliodonium salt, triaryliodonium salt, alkyliodonium salt
  • the ultraviolet light crosslinking agent is an allyl auxiliary crosslinking agent.
  • the allyl type co-crosslinking agent is preferably selected from the following one or a mixture of two or more: trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, tripropylene cyanurate and Triallyl isocyanurate.
  • the polymer emulsion is polyolefin emulsion, acrylate emulsion (such as its related derivatives, preferably one or more of the following substances with a glass transition temperature Tg>90°C: methyl methacrylate, Acrylic acid, methacrylic acid, acrylonitrile, acrylamide, isobornyl methacrylate and other acrylate copolymers).
  • the role of the polymer emulsion is to introduce polymer microparticles whose melting point or glass transition temperature is lower than the melting point of the polyolefin-based film, and coat them on the surface of the film, but the polymer microparticles need to be prepared into an emulsion for use.
  • the solid content of the polymer emulsion is 10% to 70%, more preferably 33% to 42%, and even more preferably 35% to 42%; wherein the size of the solid particles is 0.5 ⁇ m ⁇ D(50) ⁇ 5 ⁇ m, more preferably 0.5 ⁇ m ⁇ D(50) ⁇ 2.5 ⁇ m, still more preferably 0.6 ⁇ m ⁇ D(50) ⁇ 1.5 ⁇ m, still more preferably 1 ⁇ m ⁇ D(50) ⁇ 1.5 ⁇ m.
  • the size of the particles is related to the thickness of the coating. If the size of the particles is too large (eg >2.5 ⁇ m), the coating is too thick, which will cause the overall separator to be too thick and affect the design space of the battery, eventually reducing the battery capacity.
  • the melting point of the solid particles is 60-160°C, preferably 80-135°C, more preferably 80-120°C, even more preferably 110-120°C, and even more preferably Preferably it is 80-90°C.
  • the selection of the melting point of the solid particles is related to the closed cell temperature, and the upper limit should preferably be lower than the melting points of different polyolefin separators.
  • the upper limit is preferably 135°C because the polyolefin separator is UHMWPE and its melting point is around 135°C.
  • the coating formed by the polymer emulsion with a melting point lower than 135° C. can have a closed cell temperature lower than that of the PE separator, thereby improving the overall safety performance of the battery.
  • Other temperatures depend on the different polyolefin materials and the preference when you want to further reduce the closed cell temperature of the separator.
  • the binder is selected from one or more of polyacrylates (such as its derivatives), polyvinyl alcohols (such as its derivatives), and polyvinyl acetate.
  • the dispersant is a water-soluble anionic surfactant or cationic surfactant, and further, the dispersant is a water-soluble surfactant.
  • the organic solvent is an organic solvent that can be miscible with deionized water in any proportion.
  • the organic solvent is preferably one or a mixture of two or more selected from ethanol, acetone, isopropanol, dimethylformamide, N,N-dimethylformamide and dimethyl sulfoxide.
  • the base material is a polyolefin diaphragm or a polyolefin diaphragm containing a ceramic coating.
  • the polyolefin in the polyolefin separator or the polyolefin separator containing a ceramic coating is one or a mixture of two or more of the following crystalline polymers: polyethylene, polypropylene, poly-1-butene, poly-4 - methyl-1-pentene, poly-1-hexene, poly-1-octene or polymethylmethacrylate.
  • the ceramic particles in the ceramic coating include but are not limited to alumina, boehmite, silica, magnesium hydroxide, zirconia, tin oxide, calcium carbonate, barium titanate, barium sulfate, zinc oxide and titanium oxide A mixture of one or more of them.
  • the specific process of ultraviolet light irradiation is to irradiate the non-crosslinked isolation film with ultraviolet light with a wavelength range of 254-365nm, and the irradiation time is 6-10 minutes, so as to obtain a high-temperature resistant coating film.
  • the ultraviolet light with a wavelength range of 254-365nm not only ensures the penetration of UV light, but also ensures the absorption intensity and improves the initiation efficiency, and the irradiation time of 6-10 minutes can achieve the effect of uniform ultraviolet light irradiation.
  • the process parameter range As long as the process parameter range is used, there is no need to limit it, and different process parameter values will not bring about different performances of the diaphragm.
  • the components of the slurry in step 1) are preferably 0.1-2% of ultraviolet light initiator, 0.7-3.5% of ultraviolet light crosslinking agent, 0-50% of deionized water, 0-83% of polymer emulsion, viscose Binder 0-4.5%, dispersant 0-1.5%, organic solvent 8-58%.
  • each component of the slurry in step 1) is further preferably 0.1 to 0.5% of an ultraviolet photoinitiator, 0.7 to 0.9% of an ultraviolet crosslinking agent, and 0 to 19% of deionized water, 46-83% polymer emulsion, 0-4.1% binder, 0-1.2% dispersant, and 8-29% organic solvent.
  • each component of the slurry in step 1) can be further preferably 0.3-0.5% of an ultraviolet photoinitiator, 0.7-0.9% of an ultraviolet crosslinking agent, and 4-4% of deionized water. 19%, polymer emulsion 47-81%, binder 3.5-4.1%, dispersant 0.9-1.2%, organic solvent 8-29%.
  • the high-temperature-resistant coating film prepared by the method provided in the specific embodiment of the application has a thickness of 9-18 ⁇ m, an air permeability of 144-230 s/100 ml, a needle penetration strength of 472-616 gf, a closed-cell temperature of 95-143 °C, and a membrane rupture temperature of 172-216 °C. °C, the safe range is 35 ⁇ 91°C.
  • the thickness is 9-18 ⁇ m
  • the air permeability is 176-230s/100ml
  • the acupuncture strength is 473-509gf
  • the closed-cell temperature is 95-141°C
  • the membrane rupture temperature is 172-216°C.
  • the safe range is 35-91°C.
  • the polymer emulsion in the slurry is an emulsion of acrylate and its derivatives
  • it can be further preferred to have a thickness of 9-13 ⁇ m, an air permeability of 176-206s/100ml, a needle penetration strength of 473-509gf, and a closed-cell temperature of 140-142°C.
  • the film temperature is 176-216°C, and the safe range is 35-75°C.
  • the polymer emulsion in the slurry is a polyolefin emulsion
  • it can be further preferred to have a thickness of 9-18 ⁇ m, an air permeability of 152-230 s/100ml, a closed cell temperature of 95-121 °C, a membrane rupture temperature of 172-187 °C, and a safety range of 50-100 °C. 91°C.
  • the specific embodiment of the present application also provides a method for preparing a high temperature resistant coating film, comprising the following steps:
  • the coating slurry is evenly coated on one side or both sides of the substrate, and the high temperature resistant coating film is formed after being irradiated with ultraviolet light.
  • the content of the formula components and the physical properties of the high temperature resistant coating film refer to the content disclosed in the first specific embodiment.
  • the specific embodiment of the present application also provides a method for preparing a high temperature resistant coating film, comprising the following steps:
  • the coating slurry is evenly coated on one side or both sides of the substrate, and the high temperature resistant coating film is formed after being irradiated with ultraviolet light.
  • the content of the formula components and the physical properties of the high temperature resistant coating film refer to the content disclosed in the first specific embodiment.
  • the specific embodiment of the present application also provides a method for preparing a high temperature resistant coating film, comprising the following steps:
  • the coating slurry is evenly coated on one side or both sides of the substrate, and the high temperature resistant coating film is formed after being irradiated with ultraviolet light.
  • the content of the formula components and the physical properties of the high temperature resistant coating film refer to the content disclosed in the first specific embodiment.
  • the specific embodiment of the present application also provides a method for preparing a high temperature resistant coating film, comprising the following steps:
  • a mixed solution C containing an ultraviolet light crosslinking agent and an auxiliary crosslinking agent is obtained.
  • the coating slurry is evenly coated on one side or both sides of the substrate, and the high temperature resistant coating film is formed after being irradiated with ultraviolet light.
  • the content of the formulation components and the physical properties of the high temperature resistant coating film refer to the content disclosed in the first specific embodiment.
  • the specific embodiment of the present application also provides a method for preparing a high temperature resistant coating film, comprising the following steps:
  • the coating slurry is evenly coated on one side or both sides of the substrate, and the high temperature resistant coating film is formed after being irradiated with ultraviolet light.
  • the content of the formula components and the physical properties of the high temperature resistant coating film refer to the content disclosed in the first specific embodiment.
  • a specific embodiment of the present application provides an electrochemical device, including a positive electrode, a negative electrode, an electrolyte, and a coating film; the coating film includes the high-temperature-resistant coating film provided in the above examples.
  • the performance parameters are determined according to the following methods:
  • German Marr film thickness gauge 1216 is used for testing with reference to the national standard GB/T 36363-2018 "Polyolefin Separator for Lithium-ion Batteries”.
  • Gurley air permeability tester 4110 is used for testing with reference to the national standard GB/T 36363-2018 "Polyolefin Separator for Lithium-ion Batteries”.
  • Coating slurry 1 was obtained.
  • the coating slurry 1 was evenly coated on one side of the base material of a 9 micron wet-process PE separator, and the coated surface of the slurry 1 was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 1.
  • the physical properties of sample 1 are shown in Table 1.
  • the coating slurry 1 was evenly coated on both sides of the base material of the 9 micron wet-process PE separator, and both sides coated with the slurry 1 were cross-linked by ultraviolet light irradiation to obtain the high-temperature-resistant separator sample 2.
  • the physical properties of sample 2 are shown in Table 1.
  • the 9 micron wet-process PE separator was used as the blank sample 1 before coating, and the comparative physical properties are shown in Table 1.
  • Coating slurry 2 was obtained.
  • the coating slurry 2 was evenly coated on one side of the base material of a 12 micron wet-process PE separator, and the coated surface of the slurry 2 was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 3.
  • the physical properties of sample 3 are shown in Table 1.
  • the coating slurry 2 was uniformly coated on both sides of the base material of a 12-micron wet-process PE diaphragm, and the two sides coated with the slurry 2 were crosslinked by ultraviolet light irradiation to obtain a high-temperature-resistant diaphragm sample 4.
  • the physical properties of sample 4 are shown in Table 1.
  • the obtained slurries 3-A were added to 480 parts by weight of the acrylate polymer emulsion, wherein the solid content of the acrylate copolymer polymer emulsion was 33%, and the particle diameter D(50) of the solid particles was 0.6 ⁇ m.
  • Coating slurry 3 was obtained.
  • the coating slurry 3 was uniformly coated on one side of the base material of a 9 micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 5.
  • the physical properties of sample 5 are shown in Table 2.
  • the coating slurry 3 was uniformly coated on both sides of the base material of a 9 micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 6.
  • the physical properties of sample 6 are shown in Table 2.
  • Coating slurry 3 was uniformly coated on the base film surface of a single-sided coated ceramic (9 micron base film + 3 micron ceramic coating) diaphragm, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high temperature resistant diaphragm sample 7 .
  • the physical properties of sample 7 are shown in Table 2.
  • Coating slurry 3 is uniformly coated on the ceramic coating surface of a single-sided coated ceramic (9 micron base film + 3 micron ceramic coating) diaphragm, and the coated surface is crosslinked by ultraviolet light irradiation to obtain a high temperature resistant diaphragm sample 8.
  • the physical properties of sample 8 are shown in Table 2.
  • the 9 micron wet-process PE separator was used as the blank sample 1 before coating, and the comparative physical properties are shown in Table 1.
  • One-side coated ceramic (9 micron base film + 3 micron ceramic coating) diaphragm was used as the blank sample 3 before coating, and compared with the physical properties after coating, see Table 2 below.
  • the mixed solution of ultraviolet light crosslinking agent and co-crosslinking agent 4 ⁇ C The mixed solution of ultraviolet light crosslinking agent and co-crosslinking agent 4 ⁇ C.
  • Coating slurry 4 was obtained.
  • the coating slurry 4 was evenly coated on one side of the base material of a 9 micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 10 .
  • the physical properties of sample 10 are shown in Table 3.
  • the coating slurry 4 was uniformly coated on both sides of the base material of a 9 micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 11.
  • the physical properties of sample 11 are shown in Table 3.
  • Coating slurry 4 was uniformly coated on the base film surface of a single-side coated ceramic (9 micron base film + 3 micron ceramic coating) diaphragm, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high temperature resistant diaphragm sample 12 .
  • the physical properties of sample 12 are shown in Table 3.
  • the coating slurry 4 was uniformly coated on the ceramic surface of a single-side coated ceramic (9-micron base film + 3-micron ceramic coating) diaphragm, and the coated surface was cross-linked by ultraviolet light to obtain a high-temperature-resistant diaphragm sample 13.
  • the physical properties of sample 13 are shown in Table 3.
  • the coating slurry 4 was uniformly coated on both sides of a single-sided coated ceramic (9-micron base film + 3-micron ceramic coating) separator, and the coated surface was cross-linked by ultraviolet light to obtain a high-temperature-resistant diaphragm sample 14.
  • the physical properties of sample 14 are shown in Table 3.
  • the 9 micron wet-process PE separator was used as the blank sample 1 before coating, and the comparative physical properties are shown in Table 1.
  • One-side coated ceramic (9 micron base film + 3 micron ceramic coating) diaphragm was used as blank sample 3 before coating, and compared with the physical properties after coating, see Table 3 below.
  • Coating slurry 5 was obtained.
  • the coating slurry 5 was uniformly coated on one side of the substrate of a 12 micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 15.
  • the physical properties of sample 15 are shown in Table 4.
  • the coating slurry 5 was evenly coated on both sides of the base material of a 12-micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 16 .
  • the physical properties of sample 16 are shown in Table 4.
  • the coating slurry 6 was evenly coated on one side of the substrate of a 12-micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 17.
  • the physical properties of sample 17 are shown in Table 4.
  • the coating slurry 6 was uniformly coated on both sides of the base material of a 12-micron wet-process PE separator, and the coated surface was cross-linked by ultraviolet light irradiation to obtain a high-temperature-resistant separator sample 18.
  • the physical properties of sample 18 are shown in Table 4.
  • the 12 micron wet-process PE separator was used as the blank sample 2 before coating, and the comparative physical properties are shown in Table 5.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Paints Or Removers (AREA)
  • Cell Separators (AREA)

Abstract

Bouillie de revêtement, film de revêtement résistant aux hautes températures et son procédé de préparation, et dispositif électrochimique. Le film de revêtement résistant aux hautes températures comprend un substrat et un revêtement qui est placé sur au moins une surface du substrat. Le revêtement est formé par réticulation et durcissement d'une bouillie de revêtement sous rayonnement ultraviolet. La bouillie de revêtement comprend les composants suivants, en pourcentage en masse : de 0,01 à 5 % d'un initiateur ultraviolet, de 0,01 à 5 % d'un agent de réticulation aux ultraviolets, de 0 à 50 % d'eau désionisée, de 0 à 90 % d'une émulsion polymère, de 0 à 10 % d'un liant, de 0 à 5 % d'un dispersant et de 5 à 70 % d'un solvant organique. Au moins une surface du substrat est revêtue de la bouillie de revêtement d'une formulation spéciale pour obtenir un film de revêtement résistant aux hautes températures ayant une perméabilité à l'air élevée, une température de fermeture de cellule faible, une température de rupture de film élevée, d'excellentes propriétés thermiques et un grand intervalle de sécurité. Lorsque le film de revêtement résistant aux hautes températures est appliqué à une batterie, une surchauffe de batterie et un court-circuit peuvent être empêchés, ce qui permet d'assurer efficacement la sécurité de la batterie dans des scénarios de mauvais usage à haute température et d'améliorer considérablement la sécurité de la batterie.
PCT/CN2022/104368 2021-07-13 2022-07-07 Bouillie de revêtement, film de revêtement résistant aux hautes températures et son procédé de préparation, et dispositif électrochimique WO2023284619A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110787905.8 2021-07-13
CN202110787905.8A CN113594629B (zh) 2021-07-13 2021-07-13 一种耐高温涂布膜、制备方法及其电化学装置

Publications (1)

Publication Number Publication Date
WO2023284619A1 true WO2023284619A1 (fr) 2023-01-19

Family

ID=78247068

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/104368 WO2023284619A1 (fr) 2021-07-13 2022-07-07 Bouillie de revêtement, film de revêtement résistant aux hautes températures et son procédé de préparation, et dispositif électrochimique

Country Status (2)

Country Link
CN (1) CN113594629B (fr)
WO (1) WO2023284619A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115926195A (zh) * 2023-01-29 2023-04-07 广东碳语新材料有限公司 一种低分散剂含量聚烯烃微球乳液的制备方法和应用

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113594629B (zh) * 2021-07-13 2024-06-07 苏州捷力新能源材料有限公司 一种耐高温涂布膜、制备方法及其电化学装置
CN114094284B (zh) * 2021-11-16 2024-05-10 苏州捷力新能源材料有限公司 一种新型交联隔膜及其制备方法，电池及电子设备
CN114243221B (zh) * 2021-12-23 2022-10-11 中材锂膜有限公司 高弹性形变量隔膜及其制备方法
CN114678656A (zh) * 2022-03-31 2022-06-28 苏州捷力新能源材料有限公司 一种小孔径锂电池隔膜及其制备方法和应用
CN115498365A (zh) * 2022-08-18 2022-12-20 江西省通瑞新能源科技发展有限公司 高耐热性隔膜及其制备方法与应用

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103421208A (zh) * 2013-05-23 2013-12-04 浙江大学 一种辐照交联锂离子电池隔膜及其制备方法
CN105304850A (zh) * 2015-09-17 2016-02-03 中航锂电（洛阳）有限公司 锂离子电池复合隔膜用混合涂料、复合隔膜及其制备方法、锂离子电池
JP2016124926A (ja) * 2014-12-26 2016-07-11 トヨタ自動車株式会社 光重合性組成物、非水電解質二次電池用のセパレータとその製造方法、および非水電解質二次電池
CN106233499A (zh) * 2014-05-01 2016-12-14 积水化学工业株式会社 耐热性合成树脂微多孔膜及其制造方法、非水电解液二次电池用隔膜及非水电解液二次电池
CN107155329A (zh) * 2014-11-05 2017-09-12 积水化学工业株式会社 耐热性合成树脂微多孔膜及其制造方法
CN111224045A (zh) * 2018-11-27 2020-06-02 佛山市盈博莱科技股份有限公司 一种具有热关断功能的陶瓷复合隔膜及其制备方法
CN113594629A (zh) * 2021-07-13 2021-11-02 上海恩捷新材料科技有限公司 一种耐高温涂布膜、制备方法及其电化学装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100533647B1 (ko) * 2002-09-30 2005-12-06 한국과학기술연구원 자외선 경화형 다성분계 고분자 블렌드 전해질 및리튬이차전지, 그의 제조방법
JP2005347048A (ja) * 2004-06-02 2005-12-15 Nissan Motor Co Ltd 架橋高分子電解質を用いた電池
JP2008066193A (ja) * 2006-09-08 2008-03-21 Nitto Denko Corp 架橋微多孔質膜
JP2009070620A (ja) * 2007-09-11 2009-04-02 Nitto Denko Corp 架橋微多孔質膜
KR101125013B1 (ko) * 2009-07-29 2012-03-27 한양대학교 산학협력단 이온성 고분자를 포함하는 가교형 세라믹 코팅 분리막의 제조 방법, 이로부터 제조된 세라믹 코팅 분리막 및 이를 채용한 리튬이차전지
CN104157811A (zh) * 2013-12-11 2014-11-19 中航锂电（洛阳）有限公司 一种锂离子电池复合隔膜、制备方法和应用
KR101536062B1 (ko) * 2013-12-18 2015-07-10 한화토탈 주식회사 수지 조성물과, 이를 이용하여 제조된 이차전지용 분리막 및 상기 분리막을 적용한 이차전지
CN105206777B (zh) * 2015-10-26 2017-11-03 武汉惠强新能源材料科技有限公司 含锂离子传导多孔无机氧化物的锂电池隔膜及其制备方法
CN106953050B (zh) * 2017-02-13 2019-08-06 河北金力新能源科技股份有限公司 一种耐高温多层隔膜复合锂离子电池隔膜及其制备方法
CN109524595A (zh) * 2018-10-30 2019-03-26 东莞理工学院 一种具有自粘性涂层的复合锂电隔膜及其制备方法和应用

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103421208A (zh) * 2013-05-23 2013-12-04 浙江大学 一种辐照交联锂离子电池隔膜及其制备方法
CN106233499A (zh) * 2014-05-01 2016-12-14 积水化学工业株式会社 耐热性合成树脂微多孔膜及其制造方法、非水电解液二次电池用隔膜及非水电解液二次电池
CN107155329A (zh) * 2014-11-05 2017-09-12 积水化学工业株式会社 耐热性合成树脂微多孔膜及其制造方法
JP2016124926A (ja) * 2014-12-26 2016-07-11 トヨタ自動車株式会社 光重合性組成物、非水電解質二次電池用のセパレータとその製造方法、および非水電解質二次電池
CN105304850A (zh) * 2015-09-17 2016-02-03 中航锂电（洛阳）有限公司 锂离子电池复合隔膜用混合涂料、复合隔膜及其制备方法、锂离子电池
CN111224045A (zh) * 2018-11-27 2020-06-02 佛山市盈博莱科技股份有限公司 一种具有热关断功能的陶瓷复合隔膜及其制备方法
CN113594629A (zh) * 2021-07-13 2021-11-02 上海恩捷新材料科技有限公司 一种耐高温涂布膜、制备方法及其电化学装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115926195A (zh) * 2023-01-29 2023-04-07 广东碳语新材料有限公司 一种低分散剂含量聚烯烃微球乳液的制备方法和应用
CN115926195B (zh) * 2023-01-29 2023-08-08 广东碳语新材料有限公司 一种低分散剂含量聚烯烃微球乳液的制备方法和应用

Also Published As

Publication number Publication date
CN113594629A (zh) 2021-11-02
CN113594629B (zh) 2024-06-07

Similar Documents

Publication Publication Date Title
WO2023284619A1 (fr) Bouillie de revêtement, film de revêtement résistant aux hautes températures et son procédé de préparation, et dispositif électrochimique
CN111326697B (zh) 一种涂覆的隔膜及其制备方法
WO2020000164A1 (fr) Séparateur de batterie au lithium composite et son procédé de préparation
CN102437303B (zh) 复合多孔膜及其制备方法
CN104428921B (zh) 电池用隔膜及其制造方法
CN105633326B (zh) 芳香族聚酰胺复合隔膜
KR101806598B1 (ko) 도포액, 적층 다공질 필름 및 적층 다공질 필름의 제조 방법
CN109192902B (zh) 一种多级安全防护锂电池隔膜的制备方法及锂电池隔膜
CN104157819A (zh) 陶瓷和凝胶聚合物多层复合的锂电池隔膜及其制备方法
CN202534721U (zh) 复合多孔膜
CN103078075B (zh) 具有耐高温层的复合膜、制备方法和电池
CN108305972A (zh) 一种陶瓷涂层隔膜及制备方法和应用
CN103618059A (zh) 一种高分子无机涂层锂离子电池隔膜及其制备方法
CN103531736A (zh) 一种高耐热锂离子电池隔膜及其制备方法
CN105895844A (zh) 一种粘性陶瓷隔膜及其制备方法
CN108690416A (zh) 高分子-陶瓷杂化涂布组合物以及使用上述组合物的蓄电池分离膜制造方法
CN106898720B (zh) 一种锂离子电池隔膜及其制备方法
CN103102717A (zh) 一种锂离子电池用水性陶瓷涂料及其应用
CN111129393A (zh) 一种混合涂覆的锂电池隔膜及其制备方法
CN104638217A (zh) 一种复合改性隔膜及其制备方法
CN105585732A (zh) 一种紫外交联聚芳醚酮多孔膜、制备方法及其应用
CN109841785A (zh) 一种电池隔膜及其制备方法及包含该隔膜的锂离子电池
CN108598342A (zh) 一种电池隔膜、锂离子电池及其制备方法
CN113054324A (zh) 一种高安全性隔膜及电池
CN108155324A (zh) 一种锂离子电池用双功能涂覆型隔膜及其制备方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22841256

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE