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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
技術領域
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

The current collector 500 is commonly used in the secondary battery field, and any material which does not cause chemical change during battery operation and has high conductivity may be used. As a specific example, as the current collector, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, graphene, carbon nanotubes, or aluminum, or stainless steel which is surface-treated with carbon, nickel, titanium, silver, graphene, carbon nanotubes, and the like, may be used. The current collector may be in the form of foam, film, mesh, felt, or perforated film. In addition, the current collector may have surface irregularities formed on the surface. The current collector having surface irregularities including a protrusion structure formed may have an increased binding area to increase binding force between the active material film and the current collector, and allow charge transfer to occur more easily.

The present invention includes an electrode for a secondary battery produced by the production method described above. Here, the secondary battery may be an electrolyte solution-based secondary battery, specifically a secondary battery including a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte solution. In addition, the secondary battery includes a lithium secondary battery.

The present invention includes a lithium secondary battery including the electrode for a secondary battery produced by the production method described above. The electrode for a secondary battery produced by the production method described above in the secondary battery may be a positive electrode, a negative electrode, or a positive electrode and a negative electrode.

Also or independently, the present invention provides an electrode for a secondary battery.

權利要求

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