Abstract: The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including the same. The separator includes a porous substrate and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a binder including a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, a second structural unit derived from (meth)acrylonitrile, and a third structural unit derived from (meth)acrylamidosulfonic acid, a (meth)acrylamidosulfonic acid salt or a combination thereof; first inorganic particles; and second inorganic particles, wherein the average diameter of the first inorganic particles is 400 nm to 600 nm, and the average diameter of the second inorganic particles is smaller than the average diameter of the first inorganic particles.

Abstract: The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including same. The separator includes a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a heat-resistant binder including a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, and a second structural unit including at least one of a structural unit derived from (meth)acrylic acid or (meth)acrylate, and a structural unit derived from (meth)acrylamidosulfonic acid or a salt; an adhesive binder having a core-shell structure; and inorganic particles, wherein the adhesive binder has an average particle diameter of 0.2 ?m to 1.0 ?m, and the inorganic particles have an average particle diameter of 0.2 ?m to 1.0 ?m.

Abstract: The present invention relates to a separator for a lithium secondary battery and a lithium secondary battery including same, the separator including: a porous substrate; and a coating layer on at least one surface of the porous substrate. The coating layer includes a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, a second structural unit derived from (meth)acrylonitrile, and a third structural unit derived from (meth)acrylamido sulfonic acid, (meth)acrylamido sulfonic acid salt, or a combination thereof. The first structural unit is included in an amount of 55 mol % to 90 mol % based on 100 mol % of the (meth)acrylic copolymer and the second structural unit and third structural unit are each independently included in 5 mol % to 40 mol % based on 100 mol % of the (meth)acrylic copolymer. The (meth)acrylic copolymer has a weight average molecular weight of 200,000 to 700,000.

Abstract: The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including the same. The separator includes a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, a second structural unit derived from (meth)acrylonitrile, and a third structural unit including at least one of structural units derived from (meth)acrylamidosulfonic acid, a (meth)acrylamidosulfonic acid salt, or a combination thereof; inorganic particles; and an organic filler; wherein the organic filler is included in an amount of 0.1 to 50 wt % based on a total amount of the organic filler and the inorganic particles.

Abstract: The present invention relates to a heat resistant layer composition, a heat resistant layer formed therefrom, and a separator for a lithium secondary battery, and a lithium secondary battery including same, wherein the heat resistant layer composition includes an acrylic copolymer including a first structural unit derived from (meth)acrylamide, and a second structural unit including at least one of a structural unit derived from (meth)acrylic acid or a (meth)acrylate, a structural unit derived from (meth)acrylonitrile, and a structural unit derived from (meth)acrylamidosulfonic acid or a salt thereof; a cross-linking agent including at least one functional group of an aldehyde group, an epoxy group, an amide group, an imide group, an amine group, and a silane-based group; and a solvent.

Abstract: The present invention relates to a separator, a manufacturing method therefor, and a lithium secondary battery comprising the same, the separator comprising: a porous substrate; and a porous adhesive layer formed on one surface or both surfaces of the porous substrate, wherein the porous adhesive layer comprises a nitrogen-containing binder and polyvinylidene fluoride-based polymer microparticles having an average diameter of 200 nm to 700 nm, and the total thickness of the porous adhesive layer is 1 ?m or less.

Abstract: Disclosed is a separator for a lithium secondary battery including a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes an acrylic copolymer including a first structural unit derived from (meth)acrylamide, and a second structural unit including at least one of a structural unit derived from (meth)acrylic acid and (meth)acrylate, and a structural unit derived from (meth)acrylamidosulfonic acid and a salt thereof, the first structural unit is included in an amount of 55 mol % to 95 mol % with respect to 100 mol % of the acrylic copolymer, and the second structural unit is included in an amount of 5 mol % to 45 mol % with respect to 100 mol % of the acrylic copolymer, and a lithium secondary battery including the same.

Abstract: This application relates to a separator which includes a substrate and a coating layer disposed on at least one surface of the substrate. The coating layer includes first organic particles, second organic particles, and inorganic particles. An average particle diameter of the first organic particles is larger than an average particle diameter of the second organic particles and an average particle diameter of the inorganic particles. The first organic particles protrude from a surface of the coating layer to a height of about 0.1 ?m to about 0.5 ?m and are distributed on the surface of the coating layer at an area ratio of about 5% to about 15% of a surface area of the coating layer. A weight ratio of the organic particles to the inorganic particles in the coating layer is about 20:80 to about 40:60.

Abstract: 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.

Abstract: A separator for a rechargeable lithium battery and a rechargeable lithium battery including the separator, the separator including a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a heat resistant binder including a (meth)acryl copolymer including a first structural unit and a second structural unit, the first structural unit being a structural unit of a (meth)acrylamide and the second structural unit being a structural unit of a (meth)acrylic acid, a (meth)acrylate, a (meth)acrylonitrile, a (meth)acrylamido sulfonic acid, a (meth)acrylamido sulfonate salt, or a combination thereof; polyethylene particles; and first inorganic particles, and an average particle size (D50) of the first inorganic particles is larger than an average particle size (D50) of the polyethylene particles.

Abstract: A separator includes a substrate and a coating layer on at least a surface of the substrate, the coating layer including first organic particles, second organic particles, and a first binder, the first organic particles have a smaller mean particle diameter (D50) than that of the second organic particles, and at least one selected from the first organic particles and the second organic particles has a core-shell structure.

Abstract: A separator includes a substrate, a first layer on the substrate, the first layer including LiFePO4 (LFP) particles, and a second layer on the substrate, the second layer including organic particles having a melting point in a range of about 100° C. to about 130° C.

Abstract: Provided is a separator including a substrate, and a coating layer disposed on at least one surface of the substrate, wherein the coating layer comprises inorganic particles and a first binder, and a ratio of an average particle diameter (D50) of the inorganic particles to an average particle diameter (D50) of the first binder is about 1.5:1 to about 2.5:1. When using the separator, the adhesion to an electrode may be improved, thus leading to improved safety and lifetime characteristics of a battery.

Abstract: A separator for a rechargeable lithium battery and a rechargeable lithium battery including the separator, the separator including a porous substrate; and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes organic filler particles, fluorine organic binder particles, and (meth)acryl organic binder particles, an average particle diameter of the organic filler particles is equal to or greater than an average particle diameter of the fluorine organic binder particles, and the fluorine organic binder particles are coated on the porous substrate as a part of the coating layer in an amount of less than about 0.1 g/m2 per surface.

Abstract: A separator includes a substrate and a coating layer on at least one surface of the substrate, wherein the coating layer includes first organic particles and second organic particles, and an average particle diameter of the first organic particles is larger than an average particle diameter of the second organic particles. The first organic particles protrude or extend to a height of about 0.1 ?m to about 0.5 ?m from a dented portion of a surface of the coating layer, and are distributed on the surface of the coating layer in an area ratio of about 5% or greater to less than 30% with respect to a total surface area of the coating layer. The separator may have improved adhesion to electrodes, insulation characteristics, and air permeability, and a battery including the separator may have improved lifespan characteristics.

Abstract: A separator includes a substrate and a coating layer on at least a surface of the substrate, the coating layer including first organic particles, second organic particles, and a first binder, the first organic particles have a smaller mean particle diameter (D50) than that of the second organic particles, and at least one selected from the first organic particles and the second organic particles has a core-shell structure.

Abstract: Provided is a manufacturing method of a polyolefin-based multilayer composite porous film, including: a) forming a composition including a polyolefin resin and diluent to a sheet; b) stretching the sheet and extracting the diluent to manufacture a film; c) performing heat-treatment on the manufactured film; and d) coating one surface or both surfaces of the heat-treated film with a coating solution containing a heat resistant resin, wherein step c) and step d) are continuously performed.

Abstract: A separator for a rechargeable battery includes a porous substrate and a heat resistance layer on at least one surface of the porous substrate. The heat resistance layer includes an acryl-based copolymer, an alkali metal, and a filler. The acryl-based copolymer includes a unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing unit, and a sulfonate group-containing unit.

Abstract: Provided is a manufacturing method of a polyolefin-based multilayer composite porous film, including: a) forming a composition including a polyolefin resin and diluent to a sheet; b) stretching the sheet and extracting the diluent to manufacture a film; c) performing heat-treatment on the manufactured film; and d) coating one surface or both surfaces of the heat-treated film with a coating solution containing a heat resistant resin, wherein step c) and step d) are continuously performed.

Abstract: Provided is a microporous polyolefin composite film with a thermally stable porous layer at high temperature, particularly, to the microporous polyolefin composite film in which the thermally stable porous layer at high temperature, which contains organic or inorganic particles and heat-resistant polymer having aromatic ring in main chain and also having a melting temperature or a glass transition temperature of 170 to 500° C., is formed on one surface or both surfaces of a polyolefin microporous film by a phase separation, wherein the composite film with the porous layer has a permeability of 1.5×10?5 to 20.0×10?5 Darcy, a meltdown temperature of 160 to 300° C., a MD/TD shrinkage of 1 to 40% at a temperature of 150° C. for 60 minutes.