---A non-woven fabric and a preparation method therefore, a lithium battery diaphragm and a lithium battery diaphragm base membrane, relating to the field of materials. Raw materials of the non-woven fabric include main fibers and bonding fibers, wherein the bonding fibers include first bonding fibers and second bonding fibers; the melting point or softening point of the first bonding fibers is 120-220° C., and the melting point or softening point of the second bonding fibers is 100-170° C., the melting point or softening point of the second bonding fibers is at least 15° C. lower than that of the first bonding fibers; and the melting point or softening point of the main fibers is at least 20° C. higher than that of the first bonding fibers.---

A separator for a lithium secondary battery and a method for manufacturing the same. The separator for a lithium secondary battery includes: a porous polymer substrate; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes inorganic particles, a fluorine-containing binder polymer (A), and an ethylenic copolymer (B) having an ethylene monomer-derived repeating unit (a) and a vinyl acetate monomer-derived repeating unit (b). It is possible to provide a separator having improved adhesion peel strength between the porous coating layer and the porous polymer substrate and improved adhesion Lami strength to an electrode at the same time and a method for manufacturing the same by using an ethylenic copolymer having predetermined characteristics.

A separator for a lithium secondary battery and a method for manufacturing the same. The separator for a lithium secondary battery includes: a porous polymer substrate; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes inorganic particles, a fluorine-containing binder polymer (A), and an ethylenic copolymer (B) having an ethylene monomer-derived repeating unit (a) and a vinyl acetate monomer-derived repeating unit (b). It is possible to provide a separator having improved adhesion peel strength between the porous coating layer and the porous polymer substrate and improved adhesion Lami strength to an electrode at the same time and a method for manufacturing the same by using an ethylenic copolymer having predetermined characteristics.

A method and apparatus for manufacturing a separator, and a separator obtained thereby. The method for manufacturing a separator includes applying a solvent for pore impregnation onto a first surface of a porous polymer substrate, before applying slurry for forming a first porous coating layer and a second porous coating layer. In this manner, it is possible to provide a separator which has a small deviation in physical properties between the porous coating layers on the first surface and the second surface of the porous polymer substrate.

The present disclosure relates to a method and apparatus for manufacturing a separator, and a separator obtained thereby. The method for manufacturing a separator according to an embodiment of the present disclosure includes applying a solvent for pore impregnation onto a porous polymer substrate, before applying slurry for forming a porous coating layer thereto. In this manner, it is possible to provide a separator which shows a small deviation in physical properties between the porous coating layers formed on the top surface and the back surface of the porous polymer substrate.

A method and apparatus for manufacturing a separator, and a separator obtained thereby. The method for manufacturing a separator includes applying a solvent for pore impregnation onto a first surface of a porous polymer substrate, before applying slurry for forming a first porous coating layer and a second porous coating layer. In this manner, it is possible to provide a separator which has a small deviation in physical properties between the porous coating layers on the first surface and the second surface of the porous polymer substrate.

The present disclosure relates to a method and apparatus for manufacturing a separator, and a separator obtained thereby. The method for manufacturing a separator according to an embodiment of the present disclosure includes applying a solvent for pore impregnation onto a porous polymer substrate, before applying slurry for forming a porous coating layer thereto. In this manner, it is possible to provide a separator which shows a small deviation in physical properties between the porous coating layers formed on the top surface and the back surface of the porous polymer substrate.

A lithium-ion battery separator with high-temperature resistance, a preparation method thereof and a lithium-ion battery prepared therefrom fall within the field of lithium-ion battery separators. The separator has a thickness of 3.5-30 μm, a porosity of 30-80%, an adjustable pore size of 20-2000 nm, a biaxial tensile strength of ≥50 MPa, an air permeability of ≤400 s/100 cc, and a breaking temperature of ≥160° C. The preparation method comprises the following steps: mixing, melting, and plasticizing 20%-60% of a polypropylene main material, 2%-10% of a solubilizer, 30%-80% of a solvent. 0.1%-5% of a nucleating aid and/or 0.1%-1% of an antioxidant, carrying out twin-screw extrusion, carrying out thermally induced phase separation to obtain a cast sheet, and carrying out cast sheet stretching, extraction, and post-treatment or directly carrying out extraction and post-treatment. The separator has the characteristics of high-temperature resistance, biaxial high strength, uniform pore size, high specific resistance.

A lithium-ion battery separator with high-temperature resistance, a preparation method thereof and a lithium-ion battery prepared therefrom fall within the field of lithium-ion battery separators. The separator has a thickness of 3.5-30 μm, a porosity of 30-80%, an adjustable pore size of 20-2000 nm, a biaxial tensile strength of ≥50 MPa, an air permeability of ≤400 s/100 cc, and a breaking temperature of ≥160° C. The preparation method comprises the following steps: mixing, melting, and plasticizing 20%-60% of a polypropylene main material, 2%-10% of a solubilizer, 30%-80% of a solvent. 0.1%-5% of a nucleating aid and/or 0.1%-1% of an antioxidant, carrying out twin-screw extrusion, carrying out thermally induced phase separation to obtain a cast sheet, and carrying out cast sheet stretching, extraction, and post-treatment or directly carrying out extraction and post-treatment. The separator has the characteristics of high-temperature resistance, biaxial high strength, uniform pore size, high specific resistance.

Provided are a separator and a method for producing the same, and more particularly, a separator which may secure battery stability and has characteristics of significantly low heat shrinkage even at a high temperature and minimally increased resistance, and a method for producing the same. The separator according to the present disclosure includes: a porous substrate; and an inorganic particle layer positioned on one or both surfaces of the porous substrate, wherein the inorganic particle layer includes inorganic particles and a sheet-shaped inorganic binder.

Provided are a separator and a method for producing the same, and more particularly, a separator which may secure battery stability and has characteristics of significantly low heat shrinkage even at a high temperature and minimally increased resistance, and a method for producing the same. The separator according to the present disclosure includes: a porous substrate; and an inorganic particle layer positioned on one or both surfaces of the porous substrate, wherein the inorganic particle layer includes inorganic particles and a sheet-shaped inorganic binder.

Provided are a separator and a method for producing the same, and more particularly, a separator which may secure battery stability and has characteristics of significantly low heat shrinkage even at a high temperature and minimally increased resistance, and a method for producing the same.

The separator according to the present disclosure includes: a porous substrate; and an inorganic particle layer positioned on one or both surfaces of the porous substrate, wherein the inorganic particle layer includes inorganic particles and a rod-shaped inorganic binder.