Copper foil, electrodes containing the same, a secondary battery containing the same, and a method for manufacturing the same.
A copper foil with controlled crystal grain orientation and a protective layer addresses curling and cracking issues, improving the manufacturing process and capacity of secondary batteries.
JP2026116697APending Publication Date: 2026-07-10SK NEXILIS CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SK NEXILIS CO LTD
- Filing Date
- 2025-12-04
- Publication Date
- 2026-07-10
Smart Images
Figure 2026116697000001_ABST
Abstract
The present invention provides copper foil, an electrode containing the same, a secondary battery containing the same, and a method for manufacturing the same. [Solution] One embodiment of the present invention provides a copper foil comprising a copper film having a matte surface and a shiny surface, and a protective layer on the copper film, wherein when boundaries with an orientation difference of 5° or more between adjacent pixels are considered as grain boundaries, the area ratio of crystal grains (including twins) with a room-temperature GOS value in the range of 0° or more and less than 2° is 45% to 95% of the total cross-sectional area. The room-temperature GOS value is measured at room temperature on the cross-section of the copper foil using an electron backscatter diffraction pattern analyzer (EBSD).
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