Copper foil, electrodes containing the same, a secondary battery containing the same, and a method for manufacturing the same.
Copper foil with a controlled GOS value is manufactured using a specific electrolytic process, addressing curling and tearing issues, thereby improving the production of high-capacity secondary batteries and related components.
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 challenge of manufacturing thin copper foil for secondary batteries is the occurrence of curling, wrinkling, or tearing during the manufacturing process, which affects the production of high-capacity and high-quality batteries.
Copper foil with a room temperature GOS value between 4° to 12° is produced using a specific electrolytic process involving copper ions, sulfuric acid, chlorine, and organic additives, including a brightener, moderator, and roughness modifier, with a protective layer to prevent curling, wrinkling, or cracking.
The solution prevents defects during manufacturing, enhancing the productivity of intermediate components and final products like flexible printed circuit boards and secondary batteries by ensuring the copper foil's flexibility and stability.
Smart Images
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