WO2023085892A1 - 이차전지용 분리막 및 이를 포함하는 이차전지 - Google Patents
이차전지용 분리막 및 이를 포함하는 이차전지 Download PDFInfo
- Publication number
- WO2023085892A1 WO2023085892A1 PCT/KR2022/017905 KR2022017905W WO2023085892A1 WO 2023085892 A1 WO2023085892 A1 WO 2023085892A1 KR 2022017905 W KR2022017905 W KR 2022017905W WO 2023085892 A1 WO2023085892 A1 WO 2023085892A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- separator
- secondary battery
- separator body
- particulate polymer
- particle
- Prior art date
Links
- 229920000642 polymer Polymers 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000004745 nonwoven fabric Substances 0.000 claims description 28
- 239000011148 porous material Substances 0.000 claims description 25
- 239000012528 membrane Substances 0.000 claims description 24
- 229920000098 polyolefin Polymers 0.000 claims description 23
- 230000035699 permeability Effects 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 14
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 13
- 229920002530 polyetherether ketone Polymers 0.000 claims description 13
- -1 polyethylene terephthalate Polymers 0.000 claims description 13
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 9
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000004642 Polyimide Substances 0.000 claims description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- 229920001721 polyimide Polymers 0.000 claims description 7
- 239000004952 Polyamide Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 5
- 229920002678 cellulose Polymers 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229930182556 Polyacetal Natural products 0.000 claims description 3
- 239000004695 Polyether sulfone Substances 0.000 claims description 3
- 239000004697 Polyetherimide Substances 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 230000009477 glass transition Effects 0.000 claims description 3
- 229920002492 poly(sulfone) Polymers 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920006393 polyether sulfone Polymers 0.000 claims description 3
- 229920001601 polyetherimide Polymers 0.000 claims description 3
- 229920006324 polyoxymethylene Polymers 0.000 claims description 3
- 229920006380 polyphenylene oxide Polymers 0.000 claims description 3
- 239000010409 thin film Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 20
- 239000000758 substrate Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002033 PVDF binder Substances 0.000 description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 5
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 4
- FUSUHKVFWTUUBE-UHFFFAOYSA-N buten-2-one Chemical compound CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000004815 dispersion polymer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- KFDVPJUYSDEJTH-UHFFFAOYSA-N 4-ethenylpyridine Chemical compound C=CC1=CC=NC=C1 KFDVPJUYSDEJTH-UHFFFAOYSA-N 0.000 description 1
- 125000003047 N-acetyl group Chemical group 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229960001716 benzalkonium Drugs 0.000 description 1
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 244000144985 peep Species 0.000 description 1
- 229920000729 poly(L-lysine) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
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
- H01M50/443—Particulate 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
- H01M50/44—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
- H01M50/409—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 present invention relates to a separator for a secondary battery and a secondary battery including the same. Specifically, it relates to a separator for a secondary battery having improved thermal properties by introducing a heat-resistant polymer into a porous separator and a secondary battery including the same.
- a lithium secondary battery has a separator interposed between a positive electrode and a negative electrode to prevent a short circuit due to contact between the positive electrode and the negative electrode.
- Lithium secondary batteries not only generate heat during normal charging and discharging processes, but also short circuits between positive and negative electrodes may occur due to external shocks. Accordingly, in order to improve the heat resistance of the separator, a coating layer containing an inorganic material is added to the outer surface of the separator substrate having a porous structure.
- the lithium secondary battery has disadvantages such as safety problems and low power due to side reactions of the electrolyte at high temperatures, and the need for securing technology that can be an alternative to these is increasing.
- Patent Document 1 is composed of a porous substrate composed of a material with a melting point of 180 ° C. or higher and a resin structure provided on at least one surface and / or the inside thereof, having a melting point of 180 ° C. or higher, or substantially no melting point.
- a separator for electronic components containing filler particles Disclosed is a separator for electronic components containing filler particles.
- Patent Document 1 provides a highly reliable separator for electronic components with very little heat shrinkage during overheating, but the separator of Patent Document 1 forms an integrated structure in which a porous resin structure is added to a porous substrate. Therefore, it is difficult to manufacture a secondary battery with improved energy density by manufacturing a thin separator.
- Patent Document 2 discloses a separator for a secondary battery in which a pressure-plastic polymer powder is impregnated into pores of a porous nonwoven fabric substrate and compressed during assembly of the secondary battery to fill the pores.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2005-302341 (October 27, 2005)
- Patent Document 2 Korean Patent Publication No. 2018-0075003 (2018.07.04)
- Patent Document 3 Japanese Unexamined Patent Publication No. 2013-145717
- the present invention is to solve the above problems, and is made in the form of embedding a highly heat-resistant particulate polymer in a separator body made of a porous structure, thereby minimizing the increase in the overall thickness of the separator while improving the strength and excellent heat resistance of the secondary secondary It is an object of the present invention to provide a separator for a battery and a secondary battery including the same.
- a separator for a secondary battery according to the present invention for achieving this object includes a separator body having a porous structure, and a particulate polymer embedded in the separator body, and the particulate polymer is made of a material having higher heat resistance than the separator body.
- the separator body may be made of a porous membrane or non-woven fabric.
- At least a portion of the particulate polymer may be inserted into pores of the separator body.
- the weight of the particulate polymer may be 10% to 80% based on the weight of the separator body.
- the volume of the particulate polymer may be 10% to 80% based on the volume of the entire pores of the membrane body.
- the increase in air permeability of the separation membrane body in which the particulate polymer is embedded may be within 30%.
- the pore size of the separator body may be 110% to 1,000% of the particle diameter of the particulate polymer.
- the separator body is made of polyolefin, polyethyleneterephthalate, polybutyleneterephthalate, polyester, polyacetal, polyamide, polycarbonate, polyimide ), polyetheretherketone, polyethersulfone, polyphenyleneoxide, polyphenylenesulfide, polyacrylonitrile, cellulose, polyethylene naphthalene ( polyethylenenaphthalene) and mixtures thereof.
- the material of the particulate polymer is polyethylene terephthalate, polyimide, or polyamide in a range of glass transition temperature (T g ) or melting point (T m ) higher than that of the material of the separator body.
- T g glass transition temperature
- T m melting point
- the thickness of the separator body not including the particulate polymer and the thickness of the separator body including the particulate polymer may be the same size.
- the present invention provides a secondary battery including the secondary battery separator.
- the present invention can also be provided in the form of various combinations of means for solving the above problems.
- the separator for secondary batteries according to the present invention includes a particulate polymer inside the pores of the separator body having a porous structure, the separator body before the particulate polymer is included and the particulate polymer When comparing the included separator body, it is possible to manufacture a thin film separator with a minimized increase in thickness.
- the particulate polymer is made of a material having excellent heat resistance, a separator with improved thermal contraction rate can be manufactured.
- the strength of the separator may be improved.
- a separator for a secondary battery according to the present invention includes a separator body having a porous structure and a particulate polymer embedded therein, and the particulate polymer is made of a material having higher heat resistance than the separator body.
- the separator since the separator includes a particulate polymer having higher heat resistance than the separator body, heat resistance is improved compared to the case of only the separator body, and thus heat shrinkage of the separator at high temperatures may be reduced.
- the separation membrane body is formed of a porous structure, at least a portion of the particulate polymer having high heat resistance may be inserted into the pores of the separation membrane body. Therefore, it is possible to provide a separator having a thinner thickness than a conventional separator in which a coating layer is added to the outer surface of a separator substrate having a porous structure.
- the separator body is an insulating thin film having high ion permeability and mechanical strength, and for example, a polyolefin-based porous membrane or a non-woven fabric made of a polyolefin-based material may be used, but is not particularly limited thereto.
- polystyrene-based porous membrane examples include polyethylene such as high-density polyethylene, linear low-density polyethylene, low-density polyethylene, and ultra-high molecular weight polyethylene, and polyolefin-based polymers such as polypropylene, polybutylene, and polypentene, each alone or a mixture thereof. one membrane.
- polyethylene such as high-density polyethylene, linear low-density polyethylene, low-density polyethylene, and ultra-high molecular weight polyethylene
- polyolefin-based polymers such as polypropylene, polybutylene, and polypentene, each alone or a mixture thereof. one membrane.
- the material of the nonwoven fabric includes, for example, polyethyleneterephthalate, polybutyleneterephthalate, polyester, polyacetal, polyamide, poly Polycarbonate, polyimide, polyetheretherketone, polyethersulfone, polyphenyleneoxide, polyphenylenesulfide, polyacrylonitrile , cellulose (cellulose), polyethylenenaphthalene (polyethylenenaphthalene), and a nonwoven fabric containing at least one selected from the group consisting of mixtures thereof.
- the structure of the nonwoven fabric may be a spunbond nonwoven fabric or a melt blown nonwoven fabric composed of long fibers.
- the particulate polymer is composed of a material having higher heat resistance than the separator body, and the material of the particulate polymer has a glass transition temperature (T g ) or a melting point (T m ) higher than that of the separator body, polyethylene Polyethylene terephthalate, polyimide, polyamide, polysulfone, polyether ether ketone, polyphenylene sulfide, polytetrafluoroethylene ( polytetrafluoroethylene), polyetherimide, and polyamide-imide.
- T g glass transition temperature
- T m melting point
- the weight of the particulate polymer may be determined in consideration of the pore volume and air permeability of the separator body, and in detail, may be 10% to 80% based on the weight of the separator body, and more specifically, 20 % to 30%.
- the weight of the particulate polymer is less than 10% based on the weight of the separator body, it is difficult to expect an effect of improving heat shrinkage, and if it is more than 80%, ionic conductivity may become a problem, which is not preferable.
- At least some or all of the particulate polymer is inserted into the internal pores of the separator body, and the volume of the particulate polymer may be 10% to 80% based on the total volume of the pores of the separator body. .
- volume of the particulate polymer When the volume of the particulate polymer is lower than 10%, it is difficult to obtain the effect of improving heat resistance, and when the volume of the particulate polymer is higher than 80%, problems of increasing ionic conductivity and resistance may occur, which is not preferable.
- the present invention is a form in which at least a part of the particulate polymer is inserted into the pores of the separation membrane main body, and when the entire particulate polymer is inserted into the pores of the separation membrane main body, the membrane main body does not contain the particulate polymer.
- the thickness of and the thickness of the separator body including the particulate polymer may have the same size.
- at least a portion of the particulate polymer may be located on the surface of the membrane body and the rest may be inserted into the pores of the membrane body.
- the thickness of the membrane body not containing the particulate polymer is It may be less than the thickness of the separator body including.
- the pore size of the separation membrane body may be 110% to 1,000% of the particle diameter of the particle-type polymer, and the particle-type polymer may be inserted into the pores of the separation membrane body, thereby making the pore size of the separation membrane body uniform. Accordingly, electrolyte impregnability and ionic conductivity may be uniformly formed throughout the separator.
- the weight ratio of the particulate polymer and the solvent may be 1:1 to 1:10.
- the solution may further include a dispersing agent to maintain a uniformly dispersed state of the particulate polymer.
- the dispersant is, for example, polyvinylpyrrolidone, polyacrylic acid hydrazide, poly-N-vinyl-5-methoxazolidon , N-alkyl polyimine, polyvinylalcohol, N-acetyl polyimine, polyacrylamide, poly-L-lysine hydrobromide (poly-L -lysinhydrobromide), polyacroleine, benzyl-dodecyl-dimethylammonium chloride, polyacrylic acid, polyethylenimine, 4-vinylpyridine And it may be made of any one selected from the group consisting of methylvinylketone (methylvinylketone) or oligomers thereof.
- PEEP Polyetheretherketone
- a separator is prepared by coating the particulate polymer solution on a porous separator body made of nonwoven fabric and made of polyolefin (PO) material by a doctor blade coating method.
- the separation membrane was pressurized using a pressure roll to prepare a separation membrane in which the particulate polymer was inserted into the internal pores of the separation membrane body.
- the thickness of the separator manufactured in this way was manufactured to be the same as the thickness of the separator body.
- the polyetheretherketone was coated in a weight ratio of 20% relative to the weight of the separator body.
- a separator was manufactured using the same method as in Example 1, except that polyetheretherketone as a particulate polymer was coated in a weight ratio of 30% relative to the weight of the separator body.
- a separator was manufactured in the same manner as in Example 1, except that polyphenylene sulfide as a particulate polymer was coated in a weight ratio of 20% relative to the weight of the separator body.
- separator a separator made of stretched polyolefin (PO) material was used alone.
- Example 1 As the separator, the separator body used in Example 1 was used alone.
- a separator was manufactured in the same manner as in Example 1, except that polyvinylidene fluoride (PVDF) was coated in a weight ratio of 20% relative to the weight of the separator body instead of the coating of the particle-type polymer dispersion.
- PVDF polyvinylidene fluoride
- Air permeability was measured using an air permeability meter (Asahi Seiko, EGO-IT) according to JIS P8117.
- Comparing Comparative Example 1 and Comparative Example 2 since the pore size of the nonwoven fabric is larger than that of the stretched separator, the air permeability was measured to be small.
- a sample having a total length of 65 mm, a total width of 40.5 mm, and an area of 2,632.5 mm2 was prepared and subjected to heat shrinkage treatment at 130 ° C and 150 ° C for 30 minutes.
- the nonwoven fabric has excellent heat shrinkage properties compared to the stretched separator. This is because, in the case of a stretched product, there is a tendency to return to the state before processing when exposed to heat due to residual stress remaining after fabrication. On the other hand, since the nonwoven fabric is not subjected to stress during manufacturing, it basically has excellent heat shrinkage characteristics.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Separators (AREA)
Abstract
Description
통기도 (s/100 ㎖) | ||
실시예 1 | PEEK 20%, PO 부직포 | 83 |
실시예 2 | PEEK 30%, PO 부직포 | 94 |
실시예 3 | PPS 20%, PO 부직포 | 85 |
비교예 1 | 연신 PO 단독 | 160 |
비교예 2 | PO 부직포 | 75 |
비교예 3 | PVDF 20%, PO 부직포 | 128 |
130 ℃, 30 min | 150 ℃, 30 min | ||||||||
전장 (㎜) |
전폭 (㎜) |
면적 (㎟) |
수축률(%) | 전장 | 전폭 | 면적 | 수축률(%) | ||
실시예 1 | PEEK 20%, PO 부직포 | 65 | 40.5 | 2,632.5 | 0.0 | 63.5 | 40 | 2,540 | 3.5 |
실시예 2 | PEEK 30%, PO 부직포 | 65 | 40.5 | 2,632.5 | 0.0 | 64.0 | 40 | 2,560 | 2.8 |
실시예 3 | PPS 20%, PO 부직포 |
65 | 40.5 | 2,632.5 | 0.0 | 63 | 39.8 | 2,507 | 4.8 |
비교예 1 | 연신 PO 단독 | 57 | 32 | 1,824.0 | 30.7 | 14 | 9 | 126 | 95.2 |
비교예 2 | PO 부직포 | 65 | 40.5 | 2,632.5 | 0.0 | 61.5 | 38.5 | 2,367.8 | 10.1 |
비교예 3 | PVDF 20%, PO 부직포 | 65 | 40.5 | 2,632.5 | 0.0 | 62 | 39 | 2,418 | 8.1 |
Claims (11)
- 이차전지용 분리막으로서,다공성 구조로 이루어진 분리막 본체; 및상기 분리막 본체에 내장된 입자형 고분자;를 포함하고,상기 입자형 고분자는 상기 분리막 본체 보다 내열성이 높은 소재로 이루어진 이차전지용 분리막.
- 제1항에 있어서, 상기 분리막 본체는 다공성 막 또는 부직포로 이루어진 이차전지용 분리막.
- 제1항에 있어서, 상기 입자형 고분자의 적어도 일부는 상기 분리막 본체의 기공 내에 삽입되어 있는 이차전지용 분리막.
- 제1항에 있어서, 상기 입자형 고분자의 중량은 상기 분리막 본체의 중량을 기준으로 10% 내지 80%인 이차전지용 분리막.
- 제1항에 있어서, 상기 입자형 고분자의 부피는 상기 분리막 본체의 기공 전체의 부피를 기준으로 10% 내지 80%인 이차전지용 분리막.
- 제1항에 있어서, 상기 분리막 본체만의 통기도를 기준으로, 상기 입자형 고분자가 내장된 분리막 본체의 통기도 증가는 30% 이내인 이차전지용 분리막.
- 제1항에 있어서, 상기 분리막 본체의 기공 크기는 상기 입자형 고분자의 입경의 110% 내지 1,000%인 이차전지용 분리막.
- 제1항에 있어서, 상기 분리막 본체는 폴리올레핀, 폴리에틸렌테레프탈레이트 (polyethyleneterephthalate), 폴리부틸렌테레프탈레이트 (polybutyleneterephthalate), 폴리에스테르 (polyester), 폴리아세탈 (polyacetal), 폴리아미드 (polyamide), 폴리카보네이트 (polycarbonate), 폴리이미드 (polyimide), 폴리에테르에테르케톤 (polyetheretherketone), 폴리에테르설폰 (polyethersulfone), 폴리페닐렌옥사이드 (polyphenyleneoxide), 폴리페닐렌설파이드 (polyphenylenesulfide), 폴리아크릴로나이트릴(polyacrylonitrile), 셀룰로오스(cellulose), 폴리에틸렌나프탈렌 (polyethylenenaphthalene) 및 이들의 혼합물로 이루어진 군에서 선택되는 1종 이상인 이차전지용 분리막.
- 제1항에 있어서, 상기 입자형 고분자의 소재는 상기 분리막 본체의 소재 보다 유리전이온도(Tg) 또는 융점(Tm)이 높은 범위에서, 폴리에틸렌테레프탈레이트 (polyethylene terephthalate), 폴리이미드 (polyimide), 폴리아미드 (polyamide), 폴리술폰 (polysulfone), 폴리이써이써케톤(polyether ether ketone), 폴리페닐렌설파이드(polyphenylene sulfide), 폴리테트라플루오로에틸렌(polytetrafluoroethylene), 폴리이써이미드(polyetherimide), 및 폴리아미드이미드(polyamid-imide)로 이루어진 군에서 선택되는 1종 이상인 이차전지용 분리막.
- 제1항에 있어서, 상기 입자형 고분자를 포함하지 않는 분리막 본체의 두께와 상기 입자형 고분자를 포함하는 분리막 본체의 두께는 동일한 크기인 이차전지용 분리막.
- 제1항 내지 제10항 중 어느 한 항에 따른 이차전지용 분리막을 포함하는 이차전지.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280008288.XA CN116648818A (zh) | 2021-11-15 | 2022-11-14 | 用于二次电池的隔板和包括该隔板的二次电池 |
EP22893311.5A EP4258449A1 (en) | 2021-11-15 | 2022-11-14 | Separator for secondary battery and secondary battery including same |
US18/266,743 US20240106071A1 (en) | 2021-11-15 | 2022-11-14 | Separator for secondary battery and secondary battery including the same |
JP2023531686A JP2023552524A (ja) | 2021-11-15 | 2022-11-14 | 二次電池用分離膜及びこれを含む二次電池 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020210157028A KR20230070937A (ko) | 2021-11-15 | 2021-11-15 | 이차전지용 분리막 및 이를 포함하는 이차전지 |
KR10-2021-0157028 | 2021-11-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023085892A1 true WO2023085892A1 (ko) | 2023-05-19 |
Family
ID=86336435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2022/017905 WO2023085892A1 (ko) | 2021-11-15 | 2022-11-14 | 이차전지용 분리막 및 이를 포함하는 이차전지 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240106071A1 (ko) |
EP (1) | EP4258449A1 (ko) |
JP (1) | JP2023552524A (ko) |
KR (1) | KR20230070937A (ko) |
CN (1) | CN116648818A (ko) |
WO (1) | WO2023085892A1 (ko) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005302341A (ja) | 2004-04-07 | 2005-10-27 | Tomoegawa Paper Co Ltd | 電子部品用セパレータ及びその製造方法 |
KR20120001809A (ko) * | 2007-03-15 | 2012-01-04 | 히다치 막셀 가부시키가이샤 | 전기 화학 소자 |
KR20120052100A (ko) * | 2010-11-15 | 2012-05-23 | 한국생산기술연구원 | 내열성이 향상된 다공성 분리막, 이의 제조방법 및 다공성 분리막을 포함하는 전기화학소자 |
JP2013145717A (ja) | 2012-01-16 | 2013-07-25 | Toyota Industries Corp | 蓄電装置、及び車両 |
KR20140070199A (ko) * | 2012-11-30 | 2014-06-10 | 주식회사 엘지화학 | 다공성 분리막 및 그의 제조방법 |
KR20140147413A (ko) * | 2013-06-19 | 2014-12-30 | 주식회사 엘지화학 | 다공성 복합 분리막, 이를 포함하는 전기화학 소자 및 상기 분리막의 제조방법 |
KR20160011531A (ko) * | 2014-07-22 | 2016-02-01 | 주식회사 엘지화학 | 분리막 및 그의 제조방법 |
KR20180075003A (ko) | 2016-12-26 | 2018-07-04 | 현대자동차주식회사 | 안정성이 향상된 이차전지용 분리막 및 이의 제조방법 |
KR20210157028A (ko) | 2020-06-19 | 2021-12-28 | 권세기 | 마스크 착용 상태 검사 시스템 |
-
2021
- 2021-11-15 KR KR1020210157028A patent/KR20230070937A/ko unknown
-
2022
- 2022-11-14 JP JP2023531686A patent/JP2023552524A/ja active Pending
- 2022-11-14 CN CN202280008288.XA patent/CN116648818A/zh active Pending
- 2022-11-14 EP EP22893311.5A patent/EP4258449A1/en active Pending
- 2022-11-14 US US18/266,743 patent/US20240106071A1/en active Pending
- 2022-11-14 WO PCT/KR2022/017905 patent/WO2023085892A1/ko active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005302341A (ja) | 2004-04-07 | 2005-10-27 | Tomoegawa Paper Co Ltd | 電子部品用セパレータ及びその製造方法 |
KR20120001809A (ko) * | 2007-03-15 | 2012-01-04 | 히다치 막셀 가부시키가이샤 | 전기 화학 소자 |
KR20120052100A (ko) * | 2010-11-15 | 2012-05-23 | 한국생산기술연구원 | 내열성이 향상된 다공성 분리막, 이의 제조방법 및 다공성 분리막을 포함하는 전기화학소자 |
JP2013145717A (ja) | 2012-01-16 | 2013-07-25 | Toyota Industries Corp | 蓄電装置、及び車両 |
KR20140070199A (ko) * | 2012-11-30 | 2014-06-10 | 주식회사 엘지화학 | 다공성 분리막 및 그의 제조방법 |
KR20140147413A (ko) * | 2013-06-19 | 2014-12-30 | 주식회사 엘지화학 | 다공성 복합 분리막, 이를 포함하는 전기화학 소자 및 상기 분리막의 제조방법 |
KR20160011531A (ko) * | 2014-07-22 | 2016-02-01 | 주식회사 엘지화학 | 분리막 및 그의 제조방법 |
KR20180075003A (ko) | 2016-12-26 | 2018-07-04 | 현대자동차주식회사 | 안정성이 향상된 이차전지용 분리막 및 이의 제조방법 |
KR20210157028A (ko) | 2020-06-19 | 2021-12-28 | 권세기 | 마스크 착용 상태 검사 시스템 |
Also Published As
Publication number | Publication date |
---|---|
US20240106071A1 (en) | 2024-03-28 |
KR20230070937A (ko) | 2023-05-23 |
CN116648818A (zh) | 2023-08-25 |
EP4258449A1 (en) | 2023-10-11 |
JP2023552524A (ja) | 2023-12-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017010780A1 (ko) | 세퍼레이터 및 이를 포함하는 전기화학소자 | |
KR100877161B1 (ko) | 열 안정성이 우수한 고출력 이차전지용 다공성 분리막 및그 제조 방법 | |
WO2018004277A1 (ko) | 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 | |
WO2018038584A1 (ko) | 전기화학소자용 분리막 및 상기 분리막을 포함하는 전기화학소자 | |
WO2012046966A2 (ko) | 사이클 특성이 개선된 전기화학소자 | |
WO2009125985A2 (en) | Method of manufacturing the microporous polyolefin composite film with a thermally stable layer at high temperature | |
WO2009125984A2 (en) | Microporous polyolefin composite film with a thermally stable porous layer at high temperature | |
WO2017213443A1 (ko) | 세퍼레이터 및 이를 포함하는 전기화학소자 | |
WO2011065765A2 (ko) | 세퍼레이터의 제조방법, 이로부터 형성된 세퍼레이터 및 이를 포함하는 전기화학소자 | |
WO2013157902A1 (ko) | 세퍼레이터의 제조방법, 이로부터 형성된 세퍼레이터 및 이를 포함하는 전기화학소자 | |
WO2015047034A1 (ko) | 리튬 이차전지용 세퍼레이터의 제조방법, 그 방법에 의해 제조된 세퍼레이터, 및 이를 포함하는 리튬 이차전지 | |
WO2013165151A1 (ko) | 세퍼레이터 및 이를 구비한 전기화학소자 | |
WO2010027203A2 (ko) | 다공성 코팅층을 구비한 세퍼레이터 및 이를 구비한 전기화학소자 | |
WO2016148408A1 (ko) | 일체형 전극조립체 및 이를 포함하는 전기화학소자 | |
WO2014046521A1 (ko) | 리튬 이차전지용 세퍼레이터의 제조방법, 그 방법에 의해 제조된 세퍼레이터, 및 이를 포함하는 리튬 이차전지 | |
WO2017213444A1 (ko) | 세퍼레이터 및 이를 포함하는 전기화학소자 | |
WO2014209021A1 (ko) | 나노증기를 이용한 이차 전지용 다공성 분리막의 제조 방법, 이를 이용해 제조된 분리막, 및 이차 전지 | |
WO2019004711A1 (ko) | 탄소 나노 섬유 방사층을 포함하는 연료전지용 기체확산층 | |
WO2017010779A1 (ko) | 세퍼레이터 및 이를 포함하는 전기화학소자 | |
WO2023085892A1 (ko) | 이차전지용 분리막 및 이를 포함하는 이차전지 | |
WO2016105008A1 (ko) | 이온전도체의 충진 특성이 우수한 다공성 지지체, 이의 제조방법, 및 이를 포함하는 강화막 | |
KR20150030102A (ko) | 전기화학소자용 분리막의 제조방법 및 그로부터 제조된 전기화학소자용 분리막 | |
WO2021101222A1 (ko) | 전기화학소자용 분리막 및 이를 포함하는 전기화학소자 | |
WO2018128484A1 (ko) | 기능성 바인더가 적용된 전지용 분리막 및 이를 적용한 전기화학 소자 | |
KR101759336B1 (ko) | 다공성 코팅층을 갖는 다공성 분리막 및 이의 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 2023531686 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18266743 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280008288.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22893311 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022893311 Country of ref document: EP Effective date: 20230703 |