Electrode for rechargeable lithium battery, method of preparing same and rechargeable lithium battery having the same
AssigneeSamsung SDI Co., Ltd.
InventorsKeiko Matsubara, Toshiaki Tsuno, Akira Takamuku, Kyou-Yoon Sheem
Life of this patent
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Abstract
An electrode for a rechargeable lithium battery includes a current collector and an active material layer formed on the current collector. The active material layer includes an active material, a binder and a water-soluble polymer. The binder is a copolymer of (metha)acrylic acid and (metha)acrylic alkylester, and an amorphous polypropylene homopolymer or an amorphous copolymer of propylene and a C2 to C8 olefin.
Claims9
An electrode for a rechargeable lithium battery comprising:
- a current collector;
- and
- an active material layer formed on the current collector, the active material layer comprising an active material, a binder, and a water-soluble polymer,
- wherein the binder is a copolymer of a (metha)acrylic acid and a (metha)acrylic alkylester, and an amorphous polypropylene homopolymer or an amorphous copolymer of a propylene and a C2 to C8 olefin.
A rechargeable lithium battery comprising:
- an electrode comprising a current collector and an active material layer formed on the electrode, the active material layer comprising an active material, a binder, and a water-soluble polymer, wherein the binder is a copolymer of a (metha)acrylic acid and a (metha)acrylic alkylester, and an amorphous polypropylene homopolymer or an amorphous copolymer of a propylene and a C2 to C8 olefin.
A method of preparing an electrode for a rechargeable lithium battery comprising:
- mixing an aqueous dispersed solution of a binder, an active material and a water-soluble polymer to prepare an active material composition, the aqueous dispersed solution being prepared by dispersing an amorphous polypropylene homopolymer or an amorphous copolymer of a propylene and a C2 to C8 olefin in water through a dispersant including a (metha)acrylic acid and a (metha)acrylic alkylester;
- and
- coating the composition on a current collector and drying it at 60 to 180° C.
Dependencies are inferred from the claim text.