WO2014084683A1 - 유기 바인더 고분자 화합물로 피복되어 있는 섬유로 형성된 부직포, 이러한 부직포를 포함하고 있는 전기화학소자 및 상기 부직포의 제조방법 - Google Patents

유기 바인더 고분자 화합물로 피복되어 있는 섬유로 형성된 부직포, 이러한 부직포를 포함하고 있는 전기화학소자 및 상기 부직포의 제조방법 Download PDF

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WO2014084683A1
WO2014084683A1 PCT/KR2013/011037 KR2013011037W WO2014084683A1 WO 2014084683 A1 WO2014084683 A1 WO 2014084683A1 KR 2013011037 W KR2013011037 W KR 2013011037W WO 2014084683 A1 WO2014084683 A1 WO 2014084683A1
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Prior art keywords
nonwoven fabric
ether
binder polymer
separator
propylene glycol
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PCT/KR2013/011037
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English (en)
French (fr)
Korean (ko)
Inventor
유보경
김진우
이지은
정소미
김종훈
Original Assignee
주식회사 엘지화학
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Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to BR112014015684A priority Critical patent/BR112014015684B8/pt
Priority to IN2250MUN2014 priority patent/IN2014MN02250A/en
Priority to EP13859475.9A priority patent/EP2781637B1/en
Priority to JP2015534402A priority patent/JP6096908B2/ja
Priority to ES13859475T priority patent/ES2977141T3/es
Priority to CN201380005669.3A priority patent/CN104136672B/zh
Priority to FIEP13859475.9T priority patent/FI2781637T3/fi
Priority to PL13859475.9T priority patent/PL2781637T3/pl
Priority to US14/288,883 priority patent/US10153469B2/en
Publication of WO2014084683A1 publication Critical patent/WO2014084683A1/ko

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/347—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated ethers, acetals, hemiacetals, ketones or aldehydes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/10—Processes in which the treating agent is dissolved or dispersed in organic solvents; Processes for the recovery of organic solvents thereof
    • 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
    • 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
    • H01M50/411—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • 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
    • 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
    • H01M50/423—Polyamide resins
    • 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
    • H01M50/44—Fibrous material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/491—Porosity
    • 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 present invention relates to a nonwoven fabric formed of fibers coated with an organic binder polymer compound, an electrochemical device comprising such a nonwoven fabric as a separator substrate, and a method of manufacturing the nonwoven fabric, and more specifically, the spun web fiber is an organic binder polymer.
  • the present invention relates to an electrochemical device in which an organic binder polymer compound is coated on a fiber itself by being immersed in a compound solution, and a nonwoven fabric formed of fibers coated with the organic binder polymer compound is used as a separator substrate.
  • lithium ion secondary batteries developed in the early 1990s have a higher operating voltage and significantly higher energy density than conventional batteries such as Ni-MH, Ni-Cd, and sulfuric acid-lead batteries that use an aqueous solution electrolyte. It is attracting attention because of its advantages.
  • the secondary battery is generally composed of a separator and an electrolyte interposed between the positive electrode, the negative electrode, the positive electrode and the negative electrode, and the separator is one of the important factors that determine the life of the secondary battery, and serves to electrically insulate the positive electrode and the negative electrode, In order to be used as a separator, it is preferable to have high ion permeability, excellent mechanical strength, and long-term stability with respect to an electrochemical device electrolyte.
  • polyolefin-based materials or heat-resistant materials have been studied in the form of films or non-woven fabrics and used as separators.
  • nonwoven fabrics have a relatively large diameter pore. Its use has been limited.
  • One embodiment of the present invention is to provide a non-woven fabric and a method for producing the same that the fibers constituting the nonwoven fabric itself is tacky or adhesive.
  • Another object of the present invention is to provide a separator of the nonwoven fabric substrate in which pores having a relatively small diameter are formed.
  • one embodiment of the present invention is to provide a method for producing the nonwoven fabric.
  • a nonwoven fabric formed of fibers coated with an organic binder polymer compound.
  • pores having a diameter of 0.001 to 10 ⁇ m may be formed.
  • the organic binder polymer compound may be one or a mixture of two or more selected from an acrylic adhesive compound, a rubber adhesive compound, a silicone adhesive compound, and a vinyl ether adhesive compound.
  • the fiber may be a polyolefin resin such as polyurethane, polyethylene or polypropylene; Polyamides; Thermoplastic polyurethanes; Polyethylene terephthalate; nylon; And fibers formed by spinning from one or two or more mixtures selected from their copolymers.
  • a polyolefin resin such as polyurethane, polyethylene or polypropylene; Polyamides; Thermoplastic polyurethanes; Polyethylene terephthalate; nylon; And fibers formed by spinning from one or two or more mixtures selected from their copolymers.
  • the nonwoven fabric may be used as a separator substrate for an electrochemical device.
  • an electrochemical device comprising a separator and an electrolyte interposed between the positive electrode, the negative electrode, the positive electrode and the negative electrode
  • the separator is the above-mentioned separator
  • the electrochemical device may be a lithium secondary battery.
  • a method of manufacturing a separator using a nonwoven fabric comprising the step of immersing the spun fibers in the organic binder polymer compound solution.
  • the method may further include calendering the fiber coated with the organic binder polymer compound solution at a temperature of 100 to 200 ° C. and a pressure of 10 to 500 MPa.
  • the fiber may be a polyolefin resin such as polyurethane, polyethylene or polypropylene; Polyamides; Thermoplastic polyurethanes; Polyethylene terephthalate; nylon; And it may be a fiber obtained by spinning one or two or more mixtures selected from their copolymers.
  • a polyolefin resin such as polyurethane, polyethylene or polypropylene; Polyamides; Thermoplastic polyurethanes; Polyethylene terephthalate; nylon; And it may be a fiber obtained by spinning one or two or more mixtures selected from their copolymers.
  • the organic binder polymer compound solution is acetone, methyl ethyl ketone, methyl isobutyl ketone, methyl cellosolve, ethyl cellosolve, tetrahydrofuran, 1,4-dioxane, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, Propylene glycol dimethyl ether, propylene glycol diethyl ether, chloroform, methylene chloride, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1,2-trichloro Loethene, 1,2,3-trichloropropane, hexane, heptane, octane, cyclopentane, cyclohexane, benzene, toluene, xylene, methanol, ethanol, isopropanol, propanol, butanol
  • the organic binder polymer compound solution may have a viscosity of 1 to 100 cp (centipoise).
  • the fiber constituting the nonwoven fabric prepared in the present invention is coated with an organic binder polymer, and pores having a smaller diameter, for example, pores having a diameter of 0.001 to 10 ⁇ m, may be formed in the separator based on the nonwoven fabric. Accordingly, while smooth movement of lithium ions is ensured, mechanical problems, which have been pointed out as a problem of the nonwoven substrate separator, can be solved.
  • 1 to 3 schematically show a method of manufacturing a nonwoven fabric according to the prior art.
  • Figure 7 is a photograph taken at 3000 times magnification of the nonwoven fabric produced according to the present invention.
  • the term 'nonwoven fabric' means obtained by mechanically treating the fibers to entangle each other by arranging them in parallel or in an opposite direction without applying a weaving process to the fibers.
  • the nonwoven fabric used in the present invention is a web nonwoven fabric made from a material which can be used as a separator for an electrochemical device.
  • a nonwoven fabric is characterized by high elasticity, porosity, and moisture permeability while maintaining a certain level of strength.
  • 'web fiber' and 'fiber' are used to refer to fibers that are spun to form a nonwoven fabric, and are used in the same sense.
  • Non-limiting examples of the fibers forming the nonwoven fabric in the present invention include polyolefin resins such as polyurethane, polyethylene or polypropylene; Polyamides; Thermoplastic polyurethanes; Polyethylene terephthalate; nylon; And it may be one or a mixture of two or more selected from their copolymers.
  • the nonwoven fabric forming material may be made from two or more kinds of materials, and in addition to the homogeneous filament fibers, the heterofilament fibers, which contain at least one polyolefin component such as, for example, bicomponent fibers, may also be used. Can be used.
  • the method for producing a nonwoven fabric according to an embodiment of the present invention is not particularly limited as long as it can include a step of immersing the fiber after spinning in an organic binder polymer compound solution, and non-limiting examples include wet spinning using a papermaking method. .
  • the spinning conditions are not particularly limited in the present invention, and may be in accordance with conventional conditions in the art.
  • the diameter of the spun fiber is typically less than 20 ⁇ m, for example 0.5 to 18 ⁇ m or 1 to 15 ⁇ m.
  • the cross section of the fiber is generally circular, oval, corrugated on the surface, small strip form, 3 Fibers having various shapes of cross sections, such as square or polygonal, can be used.
  • the fibers may have a weight per unit area of 5 to 20 g / m 2, but are not limited thereto.
  • Nonwoven fibers according to one embodiment of the invention are coated with an organic binder polymer compound.
  • An example thereof is illustrated in FIG. 7, and it can be confirmed that the organic binder polymer compound such as an arrow mark is coated on the fiber. Since the organic binder polymer compound is coated on the fiber itself, the nonwoven fabric itself has adhesiveness or adhesive strength even without applying a separate adhesive layer or adhesive to the nonwoven fabric formed from the fiber.
  • the adhesion between the separator and the electrode is not achieved even though a separate adhesive layer is not included. It can be made, wherein the adhesion level is 10 to 100 gf / 25mm.
  • the "adhesion level” refers to the force measured when the separator is pulled to 100 mm / min at 180 degrees.
  • non-limiting examples of the rubbery adhesive compound include synthetic polyisoprene rubber, styrene-isoprene-styrene block copolymer, natural rubber, polyisobutylene, polybutene, and the like.
  • Non-limiting examples of the acrylic adhesive compound include a homogenous aggregate or copolymer of acrylic ester monomers such as butyl acrylate, isononyl acrylate and 2-ethyl hexyl acrylate, or these acrylic ester monomers and acrylic acid and acrylic acid 2-hydride. Copolymers with other monomers such as oxyethyl and vinyl acetate.
  • the web fibers constituting the nonwoven can be formed into a nonwoven substrate through processes commonly known in the art, and the nonwoven substrate can be used as a single layer as well as a multilayered structure as needed to provide various properties.
  • various kinds of nonwoven substrates are not limited to a laminated structure, but also include a structure laminated with various other plastic films, nonwoven fabrics, porous layers, and the like.
  • the pore diameter and the thickness of the nonwoven substrate formed on the nonwoven substrate may vary depending on the fiber diameter, the degree of accumulation of fibers when the nonwoven fabric is formed, and may be controlled through a calendering process.
  • the pores formed on the nonwoven substrate may have a diameter of 0.001 to 10 ⁇ m as measured by a capillary flow porometer, and smooth movement of lithium ions may be secured when the pores have a pore diameter in the above range.
  • the thickness of the nonwoven substrate may be 0.1 to 100 ⁇ m or 5 to 50 ⁇ m.
  • the thickness of the nonwoven substrate satisfies the above range, it is preferable in view of elasticity, workability, durability and prevention of unnecessary volume increase.
  • the air permeability of the nonwoven substrate may be 1 to 10 sec / 100 mL.
  • Another embodiment of the invention is directed to a method of making a porous web nonwoven fabric.
  • FIGS. One embodiment of a conventional method for making a nonwoven is shown schematically in FIGS. According to this, a step of spinning the web fibers 2 into a conventional solution 3 through a spinning device 1 (FIG. 1); Drying the web 2 (FIG. 2); And calendering the dried web 2 by the calendering roll 4 (FIG. 3).
  • the term 'normal solution' refers to a solution that does not contain an organic binder polymer compound.
  • the step of forming the adhesive layer should be further performed.
  • Nonwoven fabric manufacturing method is schematically shown in Figs.
  • the nonwoven web fibers thus produced will have tack or adhesion.
  • the organic binder polymer compound solution refers to a solution containing an acrylic adhesive compound, a rubber adhesive compound, a silicone adhesive compound, and a vinyl ether adhesive compound in a solvent.
  • the binder polymer compound solution is a water-soluble or water-absorbing resin such as a plasticizer represented by a polyhydric alcohol such as glycerin, polyethylene glycol, polypropylene glycol, polyacrylic acid, polyacrylic acid crosslinked body, polyvinyl pyrrolidone, or the like, if necessary.
  • a plasticizer represented by a polyhydric alcohol such as glycerin, polyethylene glycol, polypropylene glycol, polyacrylic acid, polyacrylic acid crosslinked body, polyvinyl pyrrolidone, or the like, if necessary.
  • various additives such as tackifiers such as terpene and petroleum, various softeners, fillers, and pigments.
  • the web fibers coated with the binder polymer compound may be dried for 1 to 10 minutes at a temperature of 40 to 100 ° C. in a manner conventional in the art.
  • the drying temperature is within the above range, it is preferable in terms of short-term drying and prevention of melting of the fiber and the binder polymer.
  • the web fibers may be calendered in a temperature range of 100 to 200 ° C.
  • the calendering temperature satisfies the above range, the tensile strength and the interfiber spacing of the nonwoven fabric can be appropriately obtained and the melting of the spun fiber and the binder polymer can be prevented.
  • the pressure of calendering may be set to 1 to 10 bar.
  • the calendering pressure satisfies the above range, it is preferable in terms of the tensile strength of the nonwoven fabric, the spacing between the fibers, and the roller durability.
  • the nonwoven fabric prepared as described above is not particularly limited in use, and in particular, may be used as a separator of an electrochemical device.
  • the electrode to be applied with the separator of the present invention is not particularly limited, and according to a conventional method known in the art, the electrode active material may be prepared in a form bound to the electrode current collector.
  • Non-limiting examples of the positive electrode active material of the electrode active material may be used a conventional positive electrode active material that can be used for the positive electrode of the conventional electrochemical device, in particular lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron oxide or a combination thereof
  • a lithium composite oxide can be used.
  • Non-limiting examples of the negative electrode active material may be a conventional negative electrode active material that can be used for the negative electrode of the conventional electrochemical device, in particular lithium metal or lithium alloy, carbon, petroleum coke, activated carbon, Lithium adsorbents such as graphite or other carbons.
  • Non-limiting examples of the positive electrode current collector is a foil produced by aluminum, nickel or a combination thereof, and non-limiting examples of the negative electrode current collector is produced by copper, gold, nickel or copper alloy or a combination thereof Foil and the like.
  • the electrolyte solution which can be used in the present invention is formed by dissolving or dissociating an electrolyte salt having a structure such as A + B - in an electrolyte solvent.
  • a + is an alkali metal cation such as Li + , Na + , K + or these combination including ions consisting of
  • B - is PF 6 -, BF 4 -, Cl -, Br -, I -, ClO 4 -, AsF 6 -, CH 3 CO 2 -, CF 3 SO 3 -, N (CF 3 SO 2) 2 - , C (CF 2 SO 2) 3 - and comprising an ion composed of the same anion or combinations thereof
  • the electrolyte solvent is propylene carbonate (PC), ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), dimethyl sulfoxide, acetonitrile, dimethoxyethan
  • the electrolyte injection may be performed at an appropriate stage of the battery manufacturing process, depending on the manufacturing process and the required physical properties of the final product. That is, it may be applied before the battery assembly or at the end of battery assembly.
  • the electrode according to the present invention may optionally further include components such as a conductive material, a binder, and a filler as necessary.
  • the conductive material uses acetylene black or carbon black, but is not limited thereto.
  • the binder may be polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl fluoride, poly acrylonitrile, nitrile rubber, polybutadiene, polystyrene, styrene butadiene rubber, polysulfide rubber, butyl rubber, hydrogenated styrene butadiene rubber, nitrocellulose and It may be selected from one or more of the group consisting of carboxymethyl cellulose.
  • the battery according to the present invention is prepared by a conventional method known in the art, for example, by dispersing an electrode active material and a binder in an organic solvent to prepare a slurry, coating it on an electrode current collector and then drying and compressing the same. It may be prepared by interposing a separator between the positive electrode and the negative electrode, but is not limited thereto.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Cell Separators (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
PCT/KR2013/011037 2012-11-30 2013-11-29 유기 바인더 고분자 화합물로 피복되어 있는 섬유로 형성된 부직포, 이러한 부직포를 포함하고 있는 전기화학소자 및 상기 부직포의 제조방법 WO2014084683A1 (ko)

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BR112014015684A BR112014015684B8 (pt) 2012-11-30 2013-11-29 Separador para célula eletroquímica, célula eletroquímica compreendendo o separador, e método de produção do separador utilizando um tecido não tecido
IN2250MUN2014 IN2014MN02250A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2012-11-30 2013-11-29
EP13859475.9A EP2781637B1 (en) 2012-11-30 2013-11-29 Nonwoven fabric formed from fiber coated with organic binder polymer compound, electrochemical device comprising nonwoven fabric, and method for manufacturing nonwoven fabric
JP2015534402A JP6096908B2 (ja) 2012-11-30 2013-11-29 有機バインダー高分子化合物で被覆されている繊維から形成された不織布、その不織布を含む電気化学素子、及びその不織布の製造方法
ES13859475T ES2977141T3 (es) 2012-11-30 2013-11-29 Tela no tejida formada a partir de fibra recubierta con compuesto polimérico aglutinante orgánico, dispositivo electroquímico que comprende tela no tejida y procedimiento para fabricar tela no tejida
CN201380005669.3A CN104136672B (zh) 2012-11-30 2013-11-29 由用有机粘合剂聚合物化合物涂覆的纤维形成的无纺布、含有该无纺布的电化学电池、及该无纺布的制备方法
FIEP13859475.9T FI2781637T3 (fi) 2012-11-30 2013-11-29 Orgaanisella sideainepolymeeriyhdisteellä pinnoitetusta kuidusta muodostettu kuitukangas, kuitukangasta käsittävä elektrokemiallinen laite ja menetelmä kuitukankaan valmistamiseksi
PL13859475.9T PL2781637T3 (pl) 2012-11-30 2013-11-29 Włóknina utworzona z włókna powlekanego organicznym polimerowym związkiem wiążącym, urządzenie elektrochemiczne obejmujące włókninię oraz sposób wytwarzania włókniny
US14/288,883 US10153469B2 (en) 2012-11-30 2014-05-28 Non-woven fabric made from fiber coated with organic binder polymer compound, electrochemical cell comprising the non-woven fabric, and method for making the non-woven fabric

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KR1020130147402A KR101546481B1 (ko) 2012-11-30 2013-11-29 유기 바인더 고분자 화합물로 피복되어 있는 섬유로 형성된 부직포, 이러한 부직포를 포함하고 있는 전기화학소자 및 상기 부직포의 제조방법

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EP2781637A1 (en) 2014-09-24
IN2014MN02250A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2015-07-24
US20140272525A1 (en) 2014-09-18
BR112014015684B1 (pt) 2021-08-31
PL2781637T3 (pl) 2024-05-20
JP2015535896A (ja) 2015-12-17
US10153469B2 (en) 2018-12-11
ES2977141T3 (es) 2024-08-19
BR112014015684A2 (pt) 2017-06-13
EP2781637B1 (en) 2024-02-21
CN104136672B (zh) 2017-09-05
BR112014015684B8 (pt) 2023-01-17
CN104136672A (zh) 2014-11-05
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EP2781637A4 (en) 2015-09-30
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