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Secondary battery electrode, and method for producing same

專利號
US11996539B2
公開日期
2024-05-28
申請人
SK INNOVATION CO., LTD.(KR Seoul)
發(fā)明人
Jonghyuk Lee; Dockyoung Yoon; Heegyoung Kang
IPC分類
H01M4/04; H01M4/131; H01M4/133; H01M4/134; H01M4/1391; H01M4/1393; H01M4/1395; H01M4/36; H01M4/62; H01M4/66; H01M10/0525; H01M4/02
技術(shù)領(lǐng)域
active,electrode,material,film,bulk,battery,may,secondary,in,resin
地域: Seoul

摘要

A method for producing a secondary battery electrode, according to the present invention, comprises: a slicing step for producing an active material film by slicing an active material bulk; and a binding step for combining a current collector and the active material film. A method for producing a secondary battery electrode according to the present invention produces an active material film by slicing an active material bulk, which is a free-standing molded body or pellet, thus allowing binder-free active material film to be produced, and as no actual restrictions exist for the thickness of the active material film, thick active material film can be produced, and thus electrodes having high-loading and high composite density can be produced.

說明書

In the method of producing an electrode for secondary battery according to an exemplary embodiment of the present invention, the negative electrode active material may include an oxide of one or two elements selected from the group comprising easily graphitizable carbon; poorly graphitizable carbon; natural graphite; artificial graphite; carbon nanotubes; graphene; silicon; Sn alloys; Si alloys; and Sn, Si, Ti, Ni, Fe, and Li; or a mixture thereof.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the positive electrode active material may include a lithium-metal oxide having a layered structure; a lithium-metal oxide having a spinel structure; a lithium-metal phosphate having an olivine structure; or a mixture thereof.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the active material may include natural graphite, artificial graphite, or a mixture thereof.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the active material may include a plate shape or a flake shape.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the bulk production step may include press-molding the raw material including composite particles having a core-shell structure of electrode active material core-carbon precursor shell as the particulate electrode active material to produce a molded body; and heat-treating the molded body to pyrolyze the carbon precursor of the shell into carbon.

權(quán)利要求

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