Composite binder composition for all-solid-state battery, electrode slurry comprising same, and method of manufacturing electrode for all-solid-state battery using electrode slurry
AssigneesHyundai Motor Company, Kia Corporation, Seoul National University R&Db Foundation
InventorsSang Mo Kim, Tae Young Kwon, Ju Yeon Lee, Sung Hoo Jung, Jang Wook Choi, Ji Eun Lee
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Abstract
A composite binder composition for an all-solid-state battery includes: a first polymer comprising a repeating structure represented by Chemical Formula 1a or Chemical Formula 1b below, and a second polymer comprising at least one selected from a group consisting of diene-based rubber, polysiloxane, and combinations thereof:
Claims10
A binder composition for an all-solid-state battery, the binder composition comprising:
- a first polymer comprising a repeating structure represented by Chemical Formula 1a below:
- and
- a second polymer comprising diene-based rubber,
- wherein in Chemical Formula 1a, R1 comprises hydrogen, a halogen element or a C1-4 alkyl group, R2 comprises an unsubstituted C1-4 alkyl group or an ether group in which a portion of carbon atoms of the alkyl group is substituted with oxygen, and m is an integer of 40 to 2,000,
- wherein the diene-based rubber comprises at least one selected from a group consisting of 1,4-polybutadiene, 1,2-polybutadiene, and combinations thereof,
- wherein the first polymer and the second polymer are copolymerized,
- wherein the binder composition is represented by Chemical Formula 3 below:
- and
- wherein in Chemical Formula 3, m is an integer of 40 to 2,000, and n is an integer of 1,500 to 15,000.
An electrode slurry for an all-solid-state battery, the electrode slurry comprising:
- a binder solution comprising a binder composition and a solvent;
- an electrode active material;
- a conductive material;
- and
- a solid electrolyte,
- wherein the binder composition comprises:
- a first polymer comprising a repeating structure represented by Chemical Formula 1a below:
- and
- a second polymer comprising diene-based rubber,
- wherein in Chemical Formula 1a, R1 comprises hydrogen, a halogen element or a C1-4 alkyl group, R2 comprises an unsubstituted C1-4 alkyl group or an ether group in which a portion of carbon atoms of the alkyl group is substituted with oxygen, and m is an integer of 40 to 2,000,
- wherein the diene-based rubber comprises at least one selected from a group consisting of 1,4-polybutadiene, 1,2-polybutadiene, and combinations thereof, and
- wherein the first polymer and the second polymer are copolymerized.
A method of manufacturing an electrode for an all-solid-state battery, the method comprising:
- preparing a binder solution comprising a binder composition and a solvent;
- manufacturing an electrode slurry by mixing the binder solution, an electrode active material, a conductive material and a solid electrolyte;
- and
- forming an electrode by applying the electrode slurry on a substrate and performing heat treatment,
- wherein the binder composition comprises:
- a first polymer comprising a repeating structure represented by Chemical Formula 1a below:
- and
- a second polymer comprising diene-based rubber,
- wherein in Chemical Formula 1a, R1 comprises hydrogen, a halogen element or a C1-4 alkyl group, R2 comprises an unsubstituted C1-4 alkyl group or an ether group in which a portion of carbon atoms of the alkyl group is substituted with oxygen, and m is an integer of 40 to 2,000,
- wherein the diene-based rubber comprises at least one selected from a group consisting of 1,4-polybutadiene, 1,2-polybutadiene, and combinations thereof, and
- wherein the first polymer and the second polymer are copolymerized.
Dependencies are inferred from the claim text.