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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, in the present invention, the sintered body may not be interpreted limitedly as being a state of being connected by the interparticle neck of an electrode active material, and as described above, the sintered body may be interpreted as a product obtained by subjecting the molded body or the raw material to heat, specifically heat energy capable of mass transfer, substantially a heat treatment at 300° C. or higher, more substantially a heat treatment at 500° C. or higher, and still more substantially a heat treatment at 600° C. or higher.

In addition, depending on the specific material of the raw material, burn-out of a pore forming agent, binding of a conductive material and an active material (including melt binding of the conductive material), burn-out of a binder, carbonization of the binder, conversion of an electrode active material precursor into an electrode active material, conversion of a carbon precursor into carbon (pyrocarbon), and/or graphitization treatment of pyrocarbon, and the like may be performed, by heat application for sintered body production or if necessary, by a separate independent heat treatment process after producing the sintered body.

權(quán)利要求

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