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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

However, even in the case in which a novel material having a high capacity is developed, a conventional technique of producing an electrode by applying a slurry containing an active material, a binder, and a conductive material to a current collector, and performing drying and rolling has limitation on implementation of an electrode having a high mixture and high density, due to the problems that when the electrode is manufactured with a high mixture density, voids are blocked so that electrolyte solution impregnation becomes difficult to decrease mobility of lithium ions, and an active material is pressed in a direction parallel to a current collector by rolling, so that a travel distance of lithium ions becomes longer and path complexity (tortuosity) is increased.

DISCLOSURE Technical Problem

An object of the present invention is to provide a method of producing a novel electrode for a secondary battery allowing implementation of high loading and a high mixture density.

Another object of the present invention is to provide a method of producing a novel electrode for a secondary battery allowing implementation of a binder-free electrode in which an active material layer contains no binder.

Another object of the present invention is to provide a method of producing a novel electrode for a secondary battery which may reduce costs by a more simplified process and allow mass production of electrodes having uniform quality.

Still another object of the present invention is to provide an active material film on which an electrode having high loading and high mixture density may be implemented, an electrode for a secondary battery including the same, and a secondary battery including the same.

Technical Solution

權(quán)利要求

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