This porous polyolefin film: has a shutdown temperature of 133°C or lower; a porosity of 41% or higher; a value of 12,500 or higher for (longitudinal (MD) direction tensile elongation (%) × longitudinal (MD) direction tensile strength (MPa) + width (TD) direction tensile elongation (%) × width (TD) direction tensile strength (MPa))/2; and satisfies formula (1),where TSD (°C) is the shutdown temperature and Tm (°C) is the lowest melting point of the melting points of respective layers. Formula (1): Tm - TSD ≥ 0 Provided is a porous polyolefin film that offers excellent safety against internal short-circuit, thermal runaway, or the like without lowering the permeability of conventional microporous membranes.
Titles:
MANUFACTURING METHOD OF SEPARATOR SEPARATOR MANUFACTURED THEREFROM AND ELECTRICHEMICAL DEVICE CONTAINING THE SAME
세퍼레이터의 제조 방법, 이로부터 제조된 세퍼레이터 및 이를 포함하는 전기화학소자
Abstracts:
The present invention relates to a method for manufacturing a separator, a separator produced by the separator and an electrochemical device having the same. Method for producing a separator according to an aspect of the present invention comprises the steps of (S1) preparing a slurry comprising inorganic particles, a binder polymer, a solvent; (S2) milling by controlling the energy of beads in the bead mill disperser into which the slurry is injected and the number of times of energy transfer of the beads to the slurry, but the energy acting on the slurry in the bead mill disperser is 0.4 KJ controlling to be larger than / kg and smaller than 1.5KJ / kg; And (S3) applying and drying the slurry on at least one surface of the porous polymer substrate. The present invention can provide a separator having excellent air permeability, low heat shrinkage rate, and low agglomeration of inorganic particles according to the manufacturing method.
본 발명은 세퍼레이터의 제조방법, 이에 의해 제조된 세퍼레이터 및 이를 구비하는 전기화학소자에 관한 것이다. 본 발명의 일 측면에 따른 세퍼레이터의 제조방법은 (S1) 무기물 입자, 바인더 고분자, 용매를 포함하는 슬러리를 준비하는 단계; (S2) 상기 슬러리가 주입된 비드밀 분산기 내 비드들(beads)의 에너지 및 상기 슬러리에 대한 상기 비드들의 에너지 전달 횟수를 제어하여 밀링하되 상기 비드밀 분산기 내에서 상기 슬러리에 작용한 에너지는 0.4KJ/kg 보다 크고 1.5KJ/kg 보다 작도록 제어하는 단계; 및 (S3) 상기 슬러리를 다공성 고분자 기재의 적어도 일면에 도포 및 건조하는 단계를 포함한다. 본 발명은 상기 제조방법에 따라 통기도가 우수하고 낮은 열수축률을 가지며, 무기물 입자들의 응집이 적은 세퍼레이터를 제공할 수 있다.
Applicant:
LG CHEMICAL LTD [KR] (주식회사 엘지화학)
Inventors:
KWON HYE JIN (권혜진)
YOO HOUNG SIK (유흥식)
YOON SU JIN (윤수진)
LEE JE AN (이제안)
Title:
METHOD OF PRODUCING FILM, AND FILM WINDING APPARATUS
Abstract:
A method of producing a film is provided. The method involves a winding step including a point-of-interest detecting step including detecting a point-of-interest on the film, a number-of-turns counting step including counting the number of turns of the film wound around a winding core, and a number-of-turns storing step including storing, in association with the number of turns of the film wound around the winding core, a position of the point-of-interest in a direction of transfer of the film. The method eliminates the need for a step of printing on a film for the purpose of locating a point-of-interest on the film.
Titles:
Separation membrane and electrochemical device
一种隔离膜及电化学装置
Abstracts:
The application provides a separator and an electrochemical device. The separator includes a porous substrate and a porous layer disposed on at least one surface of the porous substrate, wherein the porous layer includes inorganic particles, and the inorganic particles have a thermogravimetric temperature of 100 ° C or more and 1000 ° C or less. The present invention prepares a separator by coating a porous substrate with inorganic particles which can be degraded at a lower temperature, and utilizes an endothermic effect of the inorganic particles in the degradation process to reduce the internal failure temperature of the lithium ion battery. The inorganic particles lose the bound water when the temperature rises, and the generated water reacts with the electrolyte to generate a gas, thereby separating the short-circuit points, thereby preventing the further expansion of the short circuit and causing thermal runaway.
Titles:
SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME
리튬이차전지용 분리막 및 이를 포함하는 리튬이차전지
Abstracts:
Disclosed are a separator for a lithium secondary battery and a lithium secondary battery comprising same. The separator for a lithium secondary battery comprises: a porous substrate; and a coating layer disposed on at least one side of the porous substrate, wherein the coating layer contains heat-resistant organic particles, an organic heat-resistant binder, and an organic adhesive binder, wherein the heat-resistant organic particles have a thermal decomposition temperature of 150°C or higher and a particle diameter of 100 nm to 300 nm, the organic heat-resistant binder is a first organic material having a glass transition temperature of 130°C to 200°C, the organic adhesive binder is a second organic material having a glass transition temperature of -40°C or lower, and the mixing weight ratio of the organic heat-resistant binder and the organic adhesive binder is 7:3 to 9:1.
다공성 기재 및 상기 다공성 기재의 적어도 일 면에 배치된 코팅층을 함유하며, 상기 코팅층은 내열성 유기 입자, 유기 내열 바인더 및 유기 접착 바인더를 함유하며, 상기 내열성 유기 입자는 열분해온도가 150℃ 이상이며 입경이 100 내지 300nm이고, 상기 유기 내열 바인더는 유리전이온도가 130 내지 200℃인 제1유기물이며, 상기 유기 접착 바인더는 유리전이온도가 -40℃ 이하인 제2유기물이며, 상기 유기 내열 바인더와 유기 접착 바인더의 혼합 중량비는 7:3 내지 9:1인 리튬이차전지용 분리막 및 이를 포함하는 리튬이차전지가 제시된다.
Applicant:
SAMSUNG SDI CO LTD [KR] (삼성에스디아이주식회사)
Inventors:
LEE JUNG YOON [KR] (이정윤)
KIM GA IN [KR] (김가인)
KIM YONG KYOUNG [KR] (김용경)
Titles:
Battery separator and lithium ion battery
一种电池隔膜及锂离子电池
Abstracts:
The present application provides a battery separator, the separator comprising a porous base film and a lithium-receptive coating attached to one side of the porous base film, the lithium-receptive coating comprising a lithium-replenishing material and a first binder, the filler The lithium material comprises a core and a coating layer on the surface of the core, the material of the core comprises a lithium ion compound, the material of the coating layer comprises a conductive polymer; the first lithium removal capacity of the lithium ion compound is greater than the first lithium insertion capacity Or the lithium insertion potential of the lithium-depleted product of the lithium ion compound is less than or equal to 3V; the present application further provides a lithium ion battery comprising a positive electrode, a negative electrode and a separator, wherein the lithium-receptive coating of the battery separator is opposite to the positive electrode; The present application forms a lithium-receptive coating on one side of the battery separator, and prepares the battery as a battery by the lithium-receptive coating of the separator, and the battery capacity is greatly improved; and the separator also has good mechanical properties and high temperature resistance. performance.
Titles:
Method for producing microporous film and microporous film
微多孔フィルムの製造方法および微多孔フィルム
Abstracts:
An object of the present invention is to provide a microporous membrane having improved Gurley air permeability without impairing properties such as high heat resistance of a 4-methyl-1-pentene polymer. The present invention relates to a raw film having a degree of orientation of 0.88 or more obtained by melt extrusion molding a resin composition (Y) containing 4-methyl-1-pentene resin (X) and X-ray diffraction. After obtaining (F), the present invention relates to a method for producing a microporous film, a microporous film, and its use, wherein the film is stretched. [Selection figure] None
Titles:
3D PRINTED BATTERY AND METHOD OF 3D PRINTING A BATTERY
BATTERIE IMPRIMÉE EN 3D ET PROCÉDÉ D'IMPRESSION 3D D'UNE BATTERIE
Abstracts:
A method of 3D printing a battery includes extruding a first electrode ink formulation through a first deposition nozzle moving relative to a substrate, and depositing one or more continuous filaments comprising the first electrode ink formulation on the substrate to print a first electrode. A separator ink formulation is extruded through a second deposition nozzle moving relative to the substrate, and one or more continuous filaments comprising the separator ink formulation is deposited on the first electrode to print a separator precursor, which is then cured to form a separator. A second electrode ink formulation is extruded through a third deposition nozzle moving relative to the substrate, and one or more continuous filaments comprising the second electrode ink formulation is deposited to print a second electrode on the separator. The first and second electrodes and the separator are enclosed in a package, thereby forming a battery with thick electrodes.
Selon l'invention, un procédé d'impression 3D d'une batterie consiste à extruder une première formule d'encre d'électrode à travers une première buse de dépôt se déplaçant par rapport à un substrat, et à déposer un ou plusieurs filaments continus comprenant la première formule d'encre d'électrode sur le substrat pour imprimer une première électrode. Une formule d'encre de séparateur est extrudée à travers une seconde buse de dépôt se déplaçant par rapport au substrat, et un ou plusieurs filaments continus comprenant la formule d'encre de séparateur sont déposés sur la première électrode pour imprimer un précurseur de séparateur, qui est ensuite durci pour former un séparateur. Une seconde formule d'encre d'électrode est extrudée à travers une troisième buse de dépôt se déplaçant par rapport au substrat, et un ou plusieurs filaments continus comprenant la seconde formule d'encre d'électrode sont déposés pour imprimer une seconde électrode sur le séparateur. Les première et seconde électrodes et le séparateur sont enfermés dans un boîtier, formant ainsi une batterie avec des électrodes épaisses.
Titles:
METHOD FOR PRODUCING POLYPROPYLENE-BASED MICROPOROUS FILM
ポリプロピレン系微多孔膜の製造方法
Abstracts:
To produce a polypropylene-based microporous film suitable for a material of battery separator excellent in electrolyte absorption property and electrolyte retainability.SOLUTION: A method for producing a polypropylene-based microporous film sequentially performing a cold stretching step of subjecting a polypropylene raw film to heat treatment at a temperature lower than the melting point and then longitudinally stretching the film by 1.0 to 1.2 times in a longitudinal direction at a temperature of -5 to 45°C, a hot stretching step of hot stretching the film by 2 to 5 times in a longitudinal direction at a temperature lower than the melting point by 5 to 65°C and a relaxation step of relaxing the film so as to have the length of 0.7 to 0.9 times of that of the hot stretched film at a temperature lower than the melting point by 5 to 25°C to make the resulting film porous and has a hydrophilization step of contacting fluorine gas into contact with the surface of the polypropylene-based microporous film to hydrophilize the film surface.SELECTED DRAWING: None
Provided is a secondary battery separator having low weight and excellent heat resistance. The secondary battery separator according to the present invention comprises a porous base layer (A) and a heat resistant layer (B) formed of a nonwoven fabric that includes a binder and microfibers having a melting point (or a decomposition temperature if the microfibers do not have any melting point) not lower than 200°C. As the microfibers, aramid fibers are preferably used. As the binder, at least one substance selected from among polysaccharide derivatives (1), compounds each having a constitutional unit represented by formula (2), and compounds each having a constitutional unit represented by formula (3), is preferably used. In the formulae: R represents a hydroxyl group, a carboxyl group, a phenyl group, an N-substituted or unsubstituted carbamoyl group, or a 2-oxo-1-pyrrolidinyl group; n represents an integer not less than two; and L represents an ether linkage or a (-NH-)group.
