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 is developed to prevent curling, wrinkling, and cracking, enhancing the manufacturing process and performance of secondary batteries and flexible printed circuit boards.
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
AI Technical Summary
The production of thin copper foils for secondary batteries is hindered by curling, wrinkling, and cracking issues during manufacturing, which affect the productivity and performance of intermediate components and final products like flexible printed circuit boards and secondary batteries.
A copper foil with a specific crystal grain orientation distribution, characterized by an area ratio of 45% to 93% of crystal grains with a high-temperature GOS value between 0° to less than 2°, is manufactured using a copper film with a matte and shiny surface and a protective layer, preventing curling, wrinkling, and cracking during the manufacturing process.
The solution enhances the productivity and performance of copper foil-based products by preventing defects during manufacturing, allowing for the production of high-capacity secondary batteries with improved flexibility and durability.
Smart Images
Figure 2026116698000001_ABST