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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

As a substantial example, when the electrode active material is a carbon-based negative electrode active material, a raw material including core-shell composite particles of carbon-based negative electrode active material core-carbon precursor shell is press-molded to produce a molded body, and then heat-treated to convert the carbon precursor of the shell into carbon to produce the active material bulk. In contrast, a raw material including carbon-based negative electrode active material core particles and a carbon precursor (melt phase, solid or dissolved phase dissolved in a solvent) is mixed and press-molded to produce a molded body, which is then subjected to heat treatment to convert the carbon precursor in the state of being coated on core particles into carbon to produce the active material bulk.

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