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US 9,178,198 B2Granted
Separator for rechargeable lithium battery and rechargeable lithium battery including the same
AssigneeSamsung SDI Co., Ltd.
InventorsJung-Ock Yeou, Ihn Kim, Sam-Jin Park, Kwi-Seok Choi
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Abstract
A separator for a rechargeable lithium battery includes a porous substrate; and a coating layer disposed on one or more sides of the porous substrate, the coating layer including organic particles and a binder polymer, wherein the organic particles include a material different from that of the binder polymer and the binder polymer is included in the coating layer in an amount in a range of 50 to 99 wt % based on the total amount of the coating layer, and a rechargeable lithium battery including the same.
Claims17
A separator for a rechargeable lithium battery, the separator comprising:
- a porous substrate;
- and
- a coating layer on one or more sides of the porous substrate, the coating layer comprising organic particles and a binder polymer, wherein the organic particles comprise an organic compound selected from the group consisting of acrylate-based compounds, derivatives of acrylate-based compounds, diallyl phthalate-based compounds, derivatives of diallyl phthalate-based compounds, polyimide-based compounds, derivatives of polyimide-based compounds, copolymers thereof, and mixtures thereof, the organic compound is different from that of the binder polymer, and the binder polymer is included in the coating layer in an amount in a range of 50 to 99 wt % based on the total weight of the coating layer,
- wherein the binder polymer comprises a polymer polymerized from a monomer selected from the group consisting of ethylenic unsaturated carboxylic acid alkyl esters, nitrile-based compounds, conjugated diene-based compounds, ethylenic unsaturated carboxylic acids, salts of ethylenic unsaturated carboxylic acids, aromatic vinyl compounds, fluoroalkylvinylethers, vinylpyridines, non-conjugated diene-based compounds, α-olefins, ethylenic unsaturated amide compounds, sulfonic acid-based unsaturated compounds, and mixtures thereof,
- wherein the porous substrate consists essentially of at least one selected from the group consisting of glass fiber, polyolefin, polytetrafluoroethylene (PTFE), and polyacrylonitrile, and
- wherein the porous substrate is free of polyester.
3 more elements
A lithium battery comprising:
- a positive electrode;
- a negative electrode facing the positive electrode;
- a separator between the positive electrode and the negative electrode, the separator comprising:
- a porous substrate and a coating layer on one or more sides of the porous substrate, the coating layer comprising organic particles and a binder polymer, wherein the organic particles comprise an organic compound selected from the group consisting of acrylate-based compounds, derivatives of acrylate-based compounds, diallyl phthalate-based compounds, derivatives of diallyl phthalate-based compounds, polyimide-based compounds, derivatives of polyimide-based compounds, copolymers thereof, and mixtures thereof, the organic compound is different from that of the binder polymer, and the binder polymer is included in the coating layer in an amount in a range of 50 to 99 wt % based on the total weight of the coating layer,
- wherein the binder polymer comprises a polymer polymerized from a monomer selected from the group consisting of ethylenic unsaturated carboxylic acid alkyl esters, nitrile-based compounds, conjugated diene-based compounds, ethylenic unsaturated carboxylic acids, salts of ethylenic unsaturated carboxylic acids, aromatic vinyl compounds, fluoroalkylvinylethers, vinylpyridines, non-conjugated diene-based compounds, α-olefins, ethylenic unsaturated amide compounds, sulfonic acid-based unsaturated compounds, and mixtures thereof,
- wherein the porous substrate consists essentially of at least one selected from the group consisting of glass fiber, polyolefin, polytetrafluoroethylene (PTFE), and polyacrylonitrile, and
- wherein the porous substrate is free of polyester;
- and
- an electrolyte solution impregnating the positive electrode, the negative electrode, and the separator.
6 more elements
A separator for a rechargeable lithium battery, the separator comprising:
- a porous substrate;
- and
- a coating layer on one or more sides of the porous substrate, the coating layer comprising organic particles and a binder polymer, wherein the organic particles comprise an organic compound selected from the group consisting of diallyl phthalate-based compounds, derivatives of diallyl phthalate-based compounds, copolymers thereof, and mixtures thereof, the organic compound is different from that of the binder polymer, and the binder polymer is included in the coating layer in an amount in a range of 50 to 99 wt % based on the total weight of the coating layer,
- wherein the porous substrate comprises at least one selected from the group consisting of glass fiber, polyolefin, polytetrafluoroethylene (PTFE), and polyacrylonitrile, and
- wherein the porous substrate is free of polyester.
2 more elements
Dependencies are inferred from the claim text.