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Separation Film For Lithium Secondary Battery Having Adhesive Layer

Abstract: The present invention relates to a coating composition comprising a solvent inorganic particles a dispersant and a binder for coating at least one surface of a porous substrate having a plurality of pores. The binder comprises binder B and binder A wherein the binder B and the binder A both contain a vinylidene fluoride (VDF)-derived unit and a hexafluoropropylene (HFP)-derived unit. The HFP-derived unit accounts for 8% to 50% by weight of the binder B and in the binder A the HFP-derived unit is not more than 80% of the proportion thereof in the binder B and is not less than 5% by weight of the binder A. The total number average molecular weight of the binder B is 200000 to 2000000 and the total number average molecular weight of the binder A is 70% or less of that of the binder B. The weight ratio of binder A: binder B in the total coating composition is 0.1 to 10: 1. The present invention has resolved the problem that when a binder is thinned from 4? to 3? the binder is dried before being sufficiently phase-separated and thus a sufficient electrode adhesive force cannot be obtained and also in terms of a manufacturing method the present invention has provided a coating composition in which sufficient phase separation occurs even in a low-humidity condition.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
08 April 2019
Publication Number
33/2019
Publication Type
INA
Invention Field
ELECTRICAL
Status
Email
IPO@KNSPARTNERS.COM
Parent Application
Patent Number
Legal Status
Grant Date
2023-12-19
Renewal Date

Applicants

LG CHEM, LTD.
128 Yeoui-daero, Yeongdeungpo-gu Seoul 07336

Inventors

1. JEONG, So MI
188, Munji-ro, Yuseong-gu Daejeon 34122
2. SEONG, Dong Wook
188, Munji-ro, Yuseong-gu Daejeon 34122
3. JANG, Dae Sung
188, Munji-ro, Yuseong-gu Daejeon 34122

Specification

[1]The present invention relates to a lithium secondary battery as a coating composition for a separation membrane, and more specifically the adhesive coating composition for a lithium secondary battery comprising a separator for coating at least one surface of a porous base membrane having a plurality of pores having an adhesive layer. BACKGROUND [2]According to the latest smartphone, a laptop, a tablet PC, proceeds weight and high function of a handheld device such as a portable game machine, there is an increasing demand for secondary batteries used as a driving power source. In the past, nickel-cadmium, nickel-hydrogen, nickel-zinc batteries, etc., but the use and is now operating voltage is high and the energy density of the unit is being used most often with high lithium secondary battery per weight. [3] Lithium secondary batteries there is a risk, depending on the environment result in explosion of the heating phenomenon. Membrane particular, there is a high interest in the technology to increase the bonding strength between the porous coating and the electrode of the membrane in order to solve the safety problem of the lithium secondary battery. It is possible to increase the safety of the battery through the strong bonding of the membrane and the electrode. This suppresses the increase in interface resistance of the membrane and the electrode by the electrode side reactions which occur during the cycle and which improves the air permeability binder, and technology development to the membrane using the same are needed. [4] Patent Document 1 has a separation membrane and this includes the possible separation membrane applied to the secondary battery as a secondary battery using the same, a secondary battery that, even after the actual cell environment, the charge and discharge using the dimensional stability and adhesive strength of the battery can be maintained that includes an adhesive layer to provide. [5] Patent Document 1 is a porous substrate; And comprising an adhesive layer formed on one surface or both surfaces of the substrate, wherein the adhesive layer is a vinylidene fluoride include derived units and hexafluoropropylene (HFP), polyvinylidene fluoride (PVDF) is not more than 5% by weight derived unit content-based a first binder, and a vinylidene fluoride-propylene (HFP) derived units as derived units and hexafluoro and the polyvinylidene fluoride is originated unit content of the propylene (HFP) 10 to 30% by weight in the hexa fluoride (PVDF) system comprises a second binder, wherein the polyvinylidene fluoride (PVDF) the weight ratio of the total first binder and the polyvinylidene fluoride (PVDF) based second binder is from 0.5: 9.5 to 2: 8, the separation membrane and containing the same It relates to a secondary battery. [6] The electrochemical device of Patent Document 2 includes a separation membrane, the separation membrane having a binder layer, and relates to a method for producing the separation membrane, the bonding strength between the porous coating and the electrode of the separator in particular, the separation membrane in order to solve the safety of the secondary battery I was raised. Increasing the safety of the battery through the strong bonding of the membrane and the electrode, providing a binder in which inhibition of the surface resistance of the separator increases and the electrode due to the electrode side reactions which occur during the cycle to improve the air permeability. [7] Patent Document 2 discloses a porous substrate, but having a porous coating layer and the binder layer, the porous coating and the binder the binder present in the layer of poly hexafluoro least two or more the content of the difference between the propylene (HFP) 3% by weight of species vinylidene flu a fluoride (PVDF) homopolymer (homopolymer) or polyvinylidene fluoride-co-a separator comprising a propylene (P (VDF-HFP)) copolymer hexafluoropropylene is provided. Forming of a binder solution, comprising: a forming step and a forming step of the porous coating of the slurry, the binder, the binder in the solution is air-based or more divalent content difference HFP not less than 3% by weight species PVDF homopolymer or P (VDF-HFP) also it provides a method of manufacturing a separation membrane comprising the copolymer. [8] Patent Document 3, which exhibited the adhesion and excellent electrode even if the inorganic porous coating layer is coated with a thin thickness on a porous polymer substrate relates to a battery cell including a separator the adhesive force is enhanced, and to improve the heat shrinkage of the separator It provides a separation membrane. [9] On at least one surface of the Patent Document 3 is a positive electrode, a negative electrode, and a battery cell in which the electrode assembly including a separator built into the battery case which is interposed between the positive electrode and the negative electrode, the separator, the porous polymeric base material and the porous polymeric base material It includes inorganic porous coating is formed, the inorganic porous coating is a metal oxide and a metal hydroxide inorganic material particles and, hexafluoro comprising a mixture of high propylene (HFP) content of PVDF-HFP polymer binder ( " PHFP high and comprises a mixture of ") and HFP content is low PVDF-HFP polymer binder (" PHFP low '), the adhesive force of the separation membrane and, an anode or a cathode is related to a battery cell, characterized in that not less than 15gf / 25㎜ . [10] Patent Document 4 provides a way to relates to a rechargeable lithium battery including the electrode, and it has an improved adhesion, increase gyeolchakryeok between the electrode current collector and the electrode material mixture layer, reduce the binder content to be contained in the electrode material mixture layer. [11] Patent Document 4 as an electrode which is the electrode material mixture is coated on the entire current collector of an electrode active material, the electrode material mixture is characterized in that which comprises a mixture of two or more kinds of binders having a different specific gravity from each other. [12] However, there is currently a demand for thinning the secondary battery separator steady and, in recent years, an attempt is made to continue the delamination of the binder layer (reference section) of the separator to less than 3㎛ achieved. Typically the binder layer of the separator of a lithium secondary battery is coated with a slurry comprising a solvent, a binder, a dispersing agent, inorganic particles under humidification using the method of the binder is induced phase separation to many distribution on the surface. This method is very sensitive to the humidity conditions, and can take place over a wide range of changes in the phase separation of forms depending on the humidity conditions, time therefore may cause problems not sufficiently applied to the surface of the adhesive layer. [13] In addition, if drying done before an enough phase separation mothayeo not formed on the adhesive layer surface does not implement a sufficient adhesive force. When randomly induced, or phase separation rate applies to a very high binder phase separation, there is a fear that the adhesive force, gyeolchakryeok between the inorganic particles of the porous substrate and the coating layer decreases. [14] In particular, a problem arises in the thickness of the coating layer can not be obtained a sufficient adhesion electrode is dried before the binder is sufficiently phase-separated in the case to be made thin in at least 3㎛ 4㎛. When using conventional techniques or more 4㎛ section based coating (Fig. 1 (a)) because the adhesive layer is separated during one 3㎛ position below the thin film coating on the surface (Fig. 1 (b)) separating the adhesive layer is not sufficient adhesion between the electrode is not implemented (see Fig. 1). But if the prior art in the composition of the present invention similar to the PVDF and the HPF using the other two or more binders, for all the thin-film coated with a wet condition and 3㎛ could not provide a desired electrode with a sufficient adhesive force phase separation. [15] (Patent Document 0001) Republic of Korea Laid-Open Patent Publication No. 10-2016-0117962 No. [16] (Patent Document 0002) Republic of Korea Laid-Open Patent Publication No. 10-2014-0050877 No. [17] (Patent Document 0003) Republic of Korea Laid-Open Patent Publication No. 10-2016-0108116 No. [18] (Patent Document 0004) Republic of Korea Laid-Open Patent Publication No. 10-2013-0117350 No. Detailed Description of the Invention SUMMARY [19] As described above, the present invention has for its object to provide a coating composition for a separation membrane which increase the bonding strength between the porous coating and the electrode of the membrane. More specifically, the present invention is to increase the safety of the battery through the strong bonding of the membrane and electrode, sikimyeo suppress the interfacial resistance is increased in the membrane and the electrode by the electrode side reactions which occur during the cycle, a separator coating composition containing the binder to improve the air permeability It intends to provide. In particular, the coating layer (single-sided basis) of the membrane to be made thin in 4㎛ 3㎛ there was solve the problem that the binder is sufficient to obtain a sufficient electrode adhesion is dried before the phase separation, a sufficient phase separation even at low humidity conditions and the manufacturing method to provide a coating composition that can happen. Problem solving means [20] The present invention for solving the above problems is a solvent, inorganic particles, in a coating composition comprising a dispersant, a binder, wherein the binder is a binder B and a binder A for coating at least one surface of a porous substrate having a plurality of pores It included, and the binder B and the binders a are all comprising a vinylidene fluoride (VDF) derived units and hexafluoropropylene (HFP) derived units, wherein the HFP-derived units account for from 8 to 50% by weight of the binder B, the binder the a is at least 5% by weight of binder a 80% or less while the ratio of the binder B, the binder B the total number average molecular weight of said 200 002 only to 200, the total number average molecular weight of the binder a is less than 70% of the binder B , the entire coating composition binder a: B weight ratio of the binder is 0.1 to 10: 1 provide the coating composition. [21] The binder B and the binder A may be composed of vinylidene fluoride (VDF) and hexafluoropropylene (HFP). [22] In addition to the binder and the binder B A poly (vinylidene fluoride -co- chlorotrifluoroethylene with ethylene, poly (vinylidene fluoride -co- trifluoro ethylene), vinylidene fluoride-derived copolymer, poly methylmethacrylate, or the like methacrylate (polymethylmethacrylate), polyacrylonitrile (polyacrylonitrile), polyvinylpyrrolidone (polyvinylpyrrolidone), polyvinyl acetate (polyvinylacetate), ethylene-co-vinyl acetate (polyethylene co-vinyl acetate), polyethylene oxide (polyethylene oxide) , cellulose acetate (cellulose acetate), cellulose acetate butyrate (cellulose acetate butyrate), cellulose acetate propionate (cellulose acetate propionate), cyanoethyl pullulan (cyanoethylpullulan), cyanoethyl polyvinyl alcohol (cyanoethylpolyvinylalcohol), cyano ethyl cellulose (cyanoethylcellulose), cyanoethyl sucrose (cyanoethylsucrose), Pullulan (pullulan), carboxyl methyl cellulose (carboxyl methyl cellulose), an acrylonitrile-styrene-butadiene copolymer (acrylonitrile-styrene-butadiene copolymer), polyimide substance mixture (polyimide), each alone or those of two or more the may further include a binder. [23] The porous base material is polyethylene (polyethylene), PP (polypropylene), polyethylene terephthalate (polyethyleneterephthalate), polybutylene terephthalate (polybutyleneterephthalate), polyester (polyester), polyacetal (polyacetal), polyamide (polyamide), poly polycarbonate (polycarbonate), polyimide (polyimide), polyether ether ketone (polyetheretherketone), poly aryl ether ketone (polyaryletherketone), polyetherimide (polyetherimide), polyamide-imide (polyamideimide), polybenzimidazole (polybenzimidazole), poly polyether sulfone (polyethersulfone), polyphenylene oxide (polyphenyleneoxide), cyclic olefin and the polymer (cyclicolefin copolymer), polyphenylene sulfide (polyphenylenesulfide) and polyethylene naphthalene (polyethylenenaphthalene) with two of any of the polymer or those selected from the group consisting of mounds formed of a mixture of two or more A film or a multi-film, a woven fabric or nonwoven fabric. [24] The dispersing agent is a mixture one or two or more selected from the group consisting of acrylic copolymer, wherein the inorganic particles are selected from inorganic particles, and mixtures thereof with inorganic particles, the lithium ion conductivity than a dielectric constant of 5 . [25] The inorganic particles may be formed of a different size of two or more. For example, the D50 is 200㎚ 1㎛ to the inorganic particles A and D50 can be composed of 70% of the inorganic particles A less than B minerals. [26] When the content of the binder, and inorganic particles based on 100 parts by weight 3 to 50 parts by weight, and 0.5 to 5 parts by weight of the amount of the dispersing agent based on 100 parts by weight of inorganic particles. [27] The invention provides a coated membrane by the coating composition. The thickness of the coating is a cross-section based on 3㎛ below. [28] The invention provides an electrochemical device, preferably a lithium secondary battery comprising a separator interposed between the positive electrode and the negative electrode, and the anode and the cathode. [29] In the method using the coating composition of the present invention that by coating at least one surface of a porous substrate having a plurality of pores to prepare a separation membrane, the humidifying conditions provides a method for coating the coating thickness to less than 3㎛ from 35 to 45% do. Brief Description of the Drawings [30] Figure 1 is a picture of observing the phenomenon that occurs when when 4㎛ over coating (a) and below 3㎛ thin film coating (b) coating using the prior art by an electron microscope. [31] Figure 2 is a picture of observing the embodiment according to the present invention with an electron microscope. [32] 3 is a photograph observed in Comparative Example 1 according to the invention by an electron microscope. [33] Figure 4 is a picture of observing the comparative example 2 according to the invention by an electron microscope. Best Mode for Carrying Out the Invention [34] Hereinafter, it will be described in detail with respect to the present invention. Prior to this, the specification and are should not be construed as limited to the terms or general and dictionary meanings used in the claims, the inventor accordingly the concept of terms to describe his own invention in the best way based on the principle that it can be defined to be interpreted based on the meanings and concepts corresponding to technical aspects of the present invention. Therefore, the configuration shown in the embodiments described herein are not intended to limit the scope of the present invention merely nothing but an example embodiment most preferred of the invention, various equivalents can be made thereto according to the application time point and it should be understood that modifications could be. [35] The present invention provides a coating composition comprising a solvent, inorganic particles, a dispersing agent, a binder for coating at least one surface of a porous substrate having a plurality of pores. [36] 1) a porous substrate [37] The porous base material is polyethylene (polyethylene), PP (polypropylene), polyethylene terephthalate (polyethyleneterephthalate), polybutylene terephthalate (polybutyleneterephthalate), polyester (polyester), polyacetal (polyacetal), polyamide (polyamide), polycarbonate (polycarbonate), polyimide (polyimide), polyether ether ketone (polyetheretherketone), poly aryl ether ketone (polyaryletherketone), polyetherimide (polyetherimide), polyamide-imide (polyamideimide), polybenzimidazole (polybenzimidazole), polyether sulfone (polyethersulfone), polyphenylene oxide (polyphenyleneoxide), cyclic olefin and the polymer (cyclicolefin copolymer), polyphenylene sulfide (polyphenylenesulfide) made of polyethylene, 2 out of any of the polymer or those selected from the group consisting of naphthalene (polyethylenenaphthalene) species polymer film formed of a mixture of at least It may be those of a multi-film, a woven or non-woven fabric, but are not limited to. [38] The thickness of the porous substrate is not particularly limited, about 5 and may be about 50㎛, pore size and pore present in the porous substrate also is not particularly limited, about 0.01 to about 50㎛, and from about 10 to about 95, respectively % can be. [39] 2) solvent [40] And a binder and the solubility parameter to be used are similar to the solvent, it is preferred that the low boiling point. This is because the can may be made mixing a uniform, easily removed after solvent. In particular, the solvent is preferably a polar solvent having a boiling point of less than 100. However, in the case of a non-polar solvent it is undesired for, since there is a fear of the dispersion decreases. [41] Non-limiting examples of solvents include acetone (acetone), in tetrahydrofuran (tetrahydrofuran), methylene chloride (methylene chloride), chloroform, (chloroform), dimethylformamide (dimethylformamide), N- methyl-2-pyrrolidone (Nmethyl- 2-pyrrolidone, may be NMP), cyclohexane (cyclohexane), 1 either individually or in combination of two or more thereof selected from the group consisting of such as water. [42] Solvents include solids and 100 parts by weight of the total amount of solvent, i.e. mineral, a binder, and a solid mixture of a dispersing agent and a solvent (e.g., a polar solvent) of about 50 to about 90 parts by weight in a total amount of 100 parts by weight based on parts of. When the solvent is deteriorated, it had a solids and due to the increased viscosity of less than 50 parts by weight of a total amount of 100 parts by weight based on the solvent, coatability and the great difficulty occurs in the formation of the binder layer, and there is the difficulty of delamination, and, conversely, more than 90 parts by weight, productivity It can result in an increase in the degradation and production cost. [43] 3) inorganic particles [44] Inorganic particles, just electrochemically stable is not particularly limited. That is, as long as the inorganic particles that can be used in the present invention is an operating voltage range of an electrochemical device to be applied (e. G., Li / Li + reference from 0 to about 5V) oxidation and / or reduction reaction at this does not occur is not particularly limited. In particular, in the case of using the inorganic particles in the ion conductivity can be improved performance, increasing the ion conductivity in the electrochemical device. [45] In addition, the contribution in the case of using the inorganic particles as the high dielectric constant inorganic particles, the electrolyte salt liquid electrolyte, such as increased dissociation of the lithium salt can enhance the ionic conductivity of the electrolyte. [46] Because of the aforementioned reasons, the inorganic particles may include inorganic particles or a mixture thereof having at least a dielectric constant of about 5, such as about 10 or more high dielectric constant inorganic particles, the lithium ion conductivity. Non-limiting examples of a dielectric constant of about 5 or more inorganic particles is BaTiO 3 , Pb (Zr, Ti) O 3 (PZT), Pb 1-x La x Zr 1-y Ti y O 3 (PLZT), PB (Mg 3 Nb 2/3 ) O 3 -PbTiO 3 (PMN-PT), hafnia (HfO 2 ), SrTiO 3 , SnO 2 , CeO 2 , MgO, NiO, CaO, ZnO, ZrO 2 , Y 2 O 3 , Al 2 O 3 , TiO 2 , SiC, Al (OH) 3 has a mixture thereof. [47] Inorganic particles having the lithium ion conductivity is, but containing a lithium element as referring the inorganic particles having the ability to move the lithium ions nor not store lithium, inorganic particles having lithium ion conductivity are present in the internal particle structure it is possible to transfer and move lithium ions due to the type of defect, and improves lithium ion conductivity within the cell, thereby it is possible to improve the battery performance. Non-limiting examples of inorganic particles having the lithium ion conductivity include lithium phosphate (Li 3 PO 4 ), lithium titanium phosphate (LixTiy (PO 4 ) 3 , 0 [80] Hereinafter, one specifically described in the examples and experimental example more specifically as to the invention, the invention is not limited by these Examples and Experimental Examples herein. Embodiment according to the present invention can be modified in many different forms and should not be construed that the scope of the present invention is not limited to the embodiments set forth herein. Embodiment of the present invention are to those having ordinary skill in the art provided to fully describe the present invention looks. [81] 1) Preparation of binder [82] And as to prepare a binder solution of Example binder and Comparative Examples 1 and 2 according to the present invention. [83] [84] Binder A: PVDF-HFP, molecular weight 400,000, HFP content of 8% [85] Binder B: PVDF-HFP, molecular weight 900,000, HFP content of 14% [86] Mixing ratio by weight of binder A and binder B is from 1: 1 [87] [88] Exemplary only example used binder A [89] [90] Exemplary only example used binder B [91] 2) Preparation of coating layer [92] [93] Binder A, the binder B 1: 1 mix by weight was added to acetone to dissolve for about 4 hours at 50 to prepare a binder solution. 500㎚ Al in mineral 2 O 3 powder and 250㎚ Al 2 O 3 powder 9: 1 by weight mixed with a polymeric binder: was added to the binder solution to a weight ratio of 4: 1 = total inorganic particles. Cyanoethyl poly (vinyl alcohol) to prepare a slurry by the inorganic material particle crushing and dispersion was added to the PVDF-HFP 10 wt% of the total amount of binder using a ball mill method, for a total of 12 hours. At this time the ratio of the solvent and the solid content was 4: 1 was adjusted to. [94] By removing the binder using the same method to prepare a slurry of Comparative Examples 1 and 2. [95] Example and Comparative Example 1, Comparative Example 2 using the respective slurry of applying the binder was performed based on the section 3, 4, 5㎛ coating at 45% humidity conditions, subjected to end face 3㎛ standard coating at 35% relative humidity It was. In a related embodiment, the comparative example 1, and Comparative Example 2, measurement of the surface of the coating with an electron microscope naeteotda shown in Figure 2, 3 and 4, respectively. In Fig showed a good coating in a 3㎛, humidity 35% 2 only, Comparative Example 2 did not show satisfactory results in all conditions of interest coating. [96] Example, Comparative Examples 1 and 2 of the electrode was prepared by using the coating composition ER (resistance, Ohm) for each electrode, the electrode-membrane adhesive strength (gf / 15㎜), also pilgang (gf / 15 ㎜) was measured. Example 1 In eseoman showed similar properties in low humidity, 3㎛ thin film coating, Comparative Examples 1 and 2 had a problem showing a rapid decrease of the adhesive force. Comparative Example 2, not only the adhesive force is too low as a whole was a problem in that further reduction in the thin film coating. [97] TABLE 1 [98] Was found to show excellent properties in low humidity, the film coated only by the invention according to the present invention as described above. Industrial Applicability [99] The present invention binders which raises the bonding strength between the porous coating and the electrode of the membrane enhanced safety due to the strong integration of the membrane and the electrode is suppressed and the interfacial resistance is increased in the membrane and the electrode by the electrode side reactions which occur during the cycle, improves the air permeability It may provide a coating composition comprising a. In particular, when a thin film in a 4㎛ 3㎛ there was a problem that the resolution is dried before the binder is fully phase-separated to obtain a sufficient electrode adhesion, to give a coating composition which can occur even in a low humidity is sufficient phase separation in Fig conditions and production method . Claims [Claim 1]In the coating composition comprising at least a solvent, inorganic particles, a dispersing agent, a binder for coating one surface of a porous substrate having a plurality of pores, wherein the binder comprises a binder B and the binder A, the binder B and the binders A are both vinylidene fluoride (VDF) derived units and hexafluoropropylene (HFP) 80% of the comprises a derived units, wherein the HFP-derived units account for from 8 to 50% by weight of the binder B, the binder a occupied in the binder B ratio below a binder B: yet not less than 5% by weight of binder a, the binder B total number average molecular weight is less than 70% of the said 200,000 only to 200, the total number average molecular weight of the binder a is a binder B, the entire coating composition binder a weight ratio of from 0.1 to 10: 1 in the coating composition. [Claim 2] The method of claim 1, wherein the binder B and the binder A is vinylidene fluoride (VDF) copolymerized with hexamethylene consisting of fluorinated propylene (HFP) chains coating composition. [Claim 3] The method of claim 1, wherein the binder B and the binder A in addition to PVDF-CTFE, PVDF-TFE, such as vinylidene fluoride-derived copolymer, poly (methyl methacrylate) (polymethylmethacrylate), polyacrylonitrile (polyacrylonitrile), including, polyvinyl pyrrolidone (polyvinylpyrrolidone), polyvinyl acetate (polyvinylacetate), ethylene-co-vinyl acetate (polyethyleneco-vinyl acetate), polyethylene oxide (polyethylene oxide), cellulose acetate (cellulose acetate), cellulose acetate butyrate (cellulose acetate butyrate) , cellulose acetate propionate (cellulose acetate propionate), cyanoethyl pullulan (cyanoethylpullulan), cyanoethyl polyvinyl alcohol (cyanoethylpolyvinylalcohol), cyanoethyl cellulose (cyanoethylcellulose), cyanoethyl sucrose (cyanoethylsucrose), pullulan ( pullulan), carboxyl methyl cellulose (carboxyl methyl cellulose), an acrylonitrile-styrene-section Other diene copolymers (acrylonitrile-styrene-butadiene copolymer), polyimide (polyimide), each alone or two or more of these coating compositions comprising as binder a mixture of more substances. [Claim 4] The method of claim 1, wherein the porous substrate include polyethylene (polyethylene), PP (polypropylene), polyethylene terephthalate (polyethyleneterephthalate), polybutylene terephthalate (polybutyleneterephthalate), polyester (polyester), polyacetal (polyacetal), poly amides (polyamide), polycarbonate (polycarbonate), polyimide (polyimide), polyether ether ketone (polyetheretherketone), poly aryl ether ketone (polyaryletherketone), polyetherimide (polyetherimide), polyamide-imide (polyamideimide), Paul Revenge microporous sol (polybenzimidazole), polyether sulfone (polyethersulfone), polyphenylene oxide (polyphenyleneoxide), cyclic olefin and the polymer (cyclicolefin copolymer), polyphenylene sulfide any one selected from the group consisting of (polyphenylenesulfide) and polyethylene naphthalene (polyethylenenaphthalene) of a polymer or a mixture of two or more of these Polymer film or a multi-film, a woven or non-woven fabric formed of the coating composition. [Claim 5] According to claim 1, wherein the dispersant is one or more of the coating composition a mixture selected from the group consisting of an acrylic copolymer on. [Claim 6] The method of claim 1, wherein the inorganic coating composition particles are selected from the group consisting of a mixture of inorganic particles and those having inorganic particles, the lithium ion conductivity than a dielectric constant of 5. [Claim 7] The method of claim 1, wherein the inorganic particles are coated with a composition consisting of two or more different sizes. [Claim 8] According to claim 1, wherein the amount of the binder based on 100 parts by weight of inorganic particles, from 3 to 50 parts by weight of the coating composition. [Claim 9] According to claim 1, wherein the amount of the dispersing agent, based on 100 weight parts of inorganic particles from 0.5 to 5 parts by weight of the coating composition. [Claim 10] Claim 1 to claim 9, wherein the coating of the membrane by any one of the coating composition. [Claim 11] 11. The method of claim 10, wherein the thickness of the coating is less than or equal cross-sectional basis 3㎛ membrane. [Claim 12] The electrochemical device of claim 10 comprising a separator interposed between the positive electrode and the negative electrode, and the anode and the cathode. [Claim 13] 13. The method of claim 12, wherein the electrochemical device, the electrochemical device is a lithium secondary battery.

Documents

Application Documents

# Name Date
1 201917014061-IntimationOfGrant19-12-2023.pdf 2023-12-19
1 201917014061.pdf 2019-04-08
2 201917014061-PatentCertificate19-12-2023.pdf 2023-12-19
2 201917014061-STATEMENT OF UNDERTAKING (FORM 3) [08-04-2019(online)].pdf 2019-04-08
3 201917014061-POWER OF AUTHORITY [08-04-2019(online)].pdf 2019-04-08
3 201917014061-FORM 3 [14-11-2023(online)].pdf 2023-11-14
4 201917014061-FORM 3 [13-06-2023(online)].pdf 2023-06-13
4 201917014061-FORM 1 [08-04-2019(online)].pdf 2019-04-08
5 201917014061-FORM 3 [04-01-2023(online)].pdf 2023-01-04
5 201917014061-DRAWINGS [08-04-2019(online)].pdf 2019-04-08
6 201917014061-DECLARATION OF INVENTORSHIP (FORM 5) [08-04-2019(online)].pdf 2019-04-08
6 201917014061-8(i)-Substitution-Change Of Applicant - Form 6 [14-11-2022(online)].pdf 2022-11-14
7 201917014061-COMPLETE SPECIFICATION [08-04-2019(online)].pdf 2019-04-08
7 201917014061-ASSIGNMENT DOCUMENTS [14-11-2022(online)].pdf 2022-11-14
8 201917014061-Proof of Right (MANDATORY) [26-04-2019(online)].pdf 2019-04-26
8 201917014061-PA [14-11-2022(online)].pdf 2022-11-14
9 201917014061-certified copy of translation (MANDATORY) [26-04-2019(online)].pdf 2019-04-26
9 201917014061-FORM 3 [12-07-2022(online)].pdf 2022-07-12
10 201917014061-certified copy of translation (MANDATORY) [26-04-2019(online)]-1.pdf 2019-04-26
10 201917014061-FORM 3 [27-01-2022(online)].pdf 2022-01-27
11 201917014061-FER.pdf 2021-10-18
11 201917014061-FORM 3 [29-04-2019(online)].pdf 2019-04-29
12 201917014061-ABSTRACT [02-08-2021(online)].pdf 2021-08-02
12 201917014061-OTHERS-300419.pdf 2019-05-07
13 201917014061-CLAIMS [02-08-2021(online)].pdf 2021-08-02
13 201917014061-OTHERS-300419-1.pdf 2019-05-07
14 201917014061-FER_SER_REPLY [02-08-2021(online)].pdf 2021-08-02
14 201917014061-OTHERS-300419-.pdf 2019-05-07
15 201917014061-Correspondence-300419.pdf 2019-05-07
15 201917014061-OTHERS [02-08-2021(online)].pdf 2021-08-02
16 201917014061-FORM 3 [17-02-2021(online)].pdf 2021-02-17
16 abstract.jpg 2019-05-16
17 201917014061-FORM 3 [08-09-2020(online)].pdf 2020-09-08
17 201917014061-FORM 3 [03-10-2019(online)].pdf 2019-10-03
18 201917014061-FORM 18 [28-08-2020(online)].pdf 2020-08-28
18 201917014061-FORM 3 [26-03-2020(online)].pdf 2020-03-26
19 201917014061-FORM 18 [28-08-2020(online)].pdf 2020-08-28
19 201917014061-FORM 3 [26-03-2020(online)].pdf 2020-03-26
20 201917014061-FORM 3 [03-10-2019(online)].pdf 2019-10-03
20 201917014061-FORM 3 [08-09-2020(online)].pdf 2020-09-08
21 201917014061-FORM 3 [17-02-2021(online)].pdf 2021-02-17
21 abstract.jpg 2019-05-16
22 201917014061-Correspondence-300419.pdf 2019-05-07
22 201917014061-OTHERS [02-08-2021(online)].pdf 2021-08-02
23 201917014061-OTHERS-300419-.pdf 2019-05-07
23 201917014061-FER_SER_REPLY [02-08-2021(online)].pdf 2021-08-02
24 201917014061-CLAIMS [02-08-2021(online)].pdf 2021-08-02
24 201917014061-OTHERS-300419-1.pdf 2019-05-07
25 201917014061-ABSTRACT [02-08-2021(online)].pdf 2021-08-02
25 201917014061-OTHERS-300419.pdf 2019-05-07
26 201917014061-FER.pdf 2021-10-18
26 201917014061-FORM 3 [29-04-2019(online)].pdf 2019-04-29
27 201917014061-certified copy of translation (MANDATORY) [26-04-2019(online)]-1.pdf 2019-04-26
27 201917014061-FORM 3 [27-01-2022(online)].pdf 2022-01-27
28 201917014061-certified copy of translation (MANDATORY) [26-04-2019(online)].pdf 2019-04-26
28 201917014061-FORM 3 [12-07-2022(online)].pdf 2022-07-12
29 201917014061-PA [14-11-2022(online)].pdf 2022-11-14
29 201917014061-Proof of Right (MANDATORY) [26-04-2019(online)].pdf 2019-04-26
30 201917014061-COMPLETE SPECIFICATION [08-04-2019(online)].pdf 2019-04-08
30 201917014061-ASSIGNMENT DOCUMENTS [14-11-2022(online)].pdf 2022-11-14
31 201917014061-DECLARATION OF INVENTORSHIP (FORM 5) [08-04-2019(online)].pdf 2019-04-08
31 201917014061-8(i)-Substitution-Change Of Applicant - Form 6 [14-11-2022(online)].pdf 2022-11-14
32 201917014061-FORM 3 [04-01-2023(online)].pdf 2023-01-04
32 201917014061-DRAWINGS [08-04-2019(online)].pdf 2019-04-08
33 201917014061-FORM 3 [13-06-2023(online)].pdf 2023-06-13
33 201917014061-FORM 1 [08-04-2019(online)].pdf 2019-04-08
34 201917014061-POWER OF AUTHORITY [08-04-2019(online)].pdf 2019-04-08
34 201917014061-FORM 3 [14-11-2023(online)].pdf 2023-11-14
35 201917014061-STATEMENT OF UNDERTAKING (FORM 3) [08-04-2019(online)].pdf 2019-04-08
35 201917014061-PatentCertificate19-12-2023.pdf 2023-12-19
36 201917014061-IntimationOfGrant19-12-2023.pdf 2023-12-19
36 201917014061.pdf 2019-04-08

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