Separator for secondary battery, method for manufacturing the same and lithium secondary battery containing the same
AssigneesSK Innovation Co., Ltd., SK ie technology Co., Ltd.
InventorsYun Bong Kim, Su Ji Lee, Kyu Young Cho, Won Sub Kwack, Hye Jin Kim
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Abstract
Provided is a separator for a secondary battery including: a porous substrate; and a coating layer formed on the porous substrate, wherein the coating layer includes a plurality of inorganic particles and a binder for binding the plurality of inorganic particles, and the binder includes a copolymer of a monomer mixture including an acrylamide-based monomer, a vinyl cyanide monomer, and an acrylic monomer having a carboxyl group.
Claims9
A separator for a secondary battery comprising:
- a porous substrate;
- and a coating layer formed on the porous substrate,
- wherein the coating layer includes a plurality of inorganic particles and a binder for binding the plurality of inorganic particles, and
- wherein the binder includes a copolymer of a monomer mixture including 30 to 50 wt % of an acrylamide-based monomer, 20 to 40 wt % of a vinyl cyanide monomer, 5 to 20 wt % of an acrylic monomer having a carboxyl group, and 5 to 20 wt % of an acrylic monomer having a hydroxyl group, based on a total amount of the copolymer.
A method for manufacturing a separator for a secondary battery, comprising:
- a) applying an aqueous slurry including inorganic particles, a binder, and water on a porous substrate;
- and
- b) forming a coating layer by heat drying after applying the aqueous slurry,
- wherein the binder includes a copolymer of a monomer mixture including 30 to 50 wt % of an acrylamide-based monomer, 20 to 40 wt % of a vinyl cyanide monomer, 5 to 20 wt % of an acrylic monomer having a carboxyl group, and 5 to 20 wt % of an acrylic monomer having a hydroxyl group, based on a total amount of the copolymer.
Dependencies are inferred from the claim text.