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Secondary battery electrode, and method for producing same

專利號(hào)
US11996539B2
公開日期
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
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 a secondary battery according to an exemplary embodiment of the present invention, the raw material may include two different kinds of electrode active materials having different compositions, crystal structures, particle shapes, mechanical properties, or physical properties.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the porosity of the active material film may be controlled by the porosity of the active material bulk.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the electrode active material in the active material bulk may have an orientation, and the oriented direction of the electrode active material in the active material film based on the thickness direction of the active material film may be controlled by a cutting direction in the cutting step.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the binding step may include forming an adhesive layer on at least one surface of a surface of the current collector and a surface of the active material film; and layering a current collector and an active material film so as to be in contact with each other, with the adhesive layer interposed therebetween.

In the method of producing an electrode for a secondary battery according to an exemplary embodiment of the present invention, the binding step may include forming a metal film on one surface of the active material film.

In the method of producing an electrode for a secondary method according to an exemplary embodiment of the present invention, the adhesive layer may be conductive.

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