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Secondary battery electrode, and method for producing same

專(zhuān)利號(hào)
US11996539B2
公開(kāi)日期
2024-05-28
申請(qǐng)人
SK INNOVATION CO., LTD.（KR Seoul）
發(fā)明人
Jonghyuk Lee; Dockyoung Yoon; Heegyoung Kang
IPC分類(lèi)
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(shuō)明書(shū)

An active material bulk is produced by the production method according to an exemplary embodiment of the present invention, and sliced to produce an active material film adhered a current collector, thereby controlling an orientation in a thickness direction of the active material film (oriented direction of the electrode active material particles), along the cutting direction in which the active material bulk having an orientation of the electrode active material is sliced.

It substantially difficult to implement the orientation of the electrode active material film, in the conventional slurry-based electrode production technique of applying and rolling of a slurry. This is because when an active material slurry is applied on a current collector and rolled, and plastic deformation (permanent deformation) of the active material occurs, the orientation of the plastically deformed electrode active material particles should be limited to a direction parallel to an interface direction of the current collector and the active material layer (identical to an in-plane direction of an active material layer surface).

However, as in an example shown in FIG. 2, the oriented direction of the electrode active material based on the thickness direction of the active material film 300 may be controlled, only by adjusting the cutting direction (CD in FIG. 2) of the active material bulk 200 having an orientation of the electrode active material.

權(quán)利要求

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