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Secondary battery electrode, and method for producing same

專(zhuān)利號(hào)
US11996539B2
公開(kāi)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(lèi)
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(shuō)明書(shū)

When one or more electrodes selected from a positive electrode and a negative electrode are a positive electrode, in the positive electrode, the active material film containing the positive electrode active material is adhered to at least one surface of the current collector by an adhesive. That is, the lithium secondary battery according to an exemplary embodiment of the present invention may include a positive electrode in which the active material film containing a positive electrode active material is adhered to at least one surface of the current collector by an adhesive; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte solution. Here, the negative electrode may include a negative electrode active material layer disposed on the current collector, and the negative electrode active material in the negative electrode active material layer may be any material which is commonly used in the negative electrode of the lithium secondary battery, and the negative electrode active material may be any material capable of lithium intercalation. As a non-limiting example, the negative electrode active material may be one or two or more materials selected from the group comprising lithium (metal lithium), easily graphitized carbon, poorly graphitized carbon, graphite, silicon, an Sn alloy, an Si alloy, an Sn oxide, an Si oxide, a Ti oxide, an Ni oxide, a Fe oxide (FeO), a lithium-titanium oxide (LiTiO2, Li4Ti5O12), and the like.

權(quán)利要求

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