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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

Thereafter, charge was performed with a current corresponding to 0.05 C (13 mA, 0.9 mA/cm2) for about 20 hours. After the charge was completed, discharge to 1.5 V was performed with 0.1 C, and capacity and charge/discharge efficiency were measured. (Charge condition CC/CV 0.05 C 0.05V 0.01 C CUT-OFF, discharge condition CC 0.1 C 1.5V CUT-OFF)

TABLE 1 Comparative Comparative Example Example 1 Example 2 Negative electrode ?1.73 (g/cm3) ?1.70 (g/cm3) ?1.70 (g/cm3) active material density Negative electrode ?49.4 (g/cm2) ?13.1 (g/cm2) ???23 (g/cm2) active material loading amount Negative electrode ??280 (μm) ???87 (μm) ??145 (μm) active material

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