Copper foil, electrodes containing the same, a secondary battery containing the same, and a method for manufacturing the same.
The copper foil with a protective layer addresses the adhesion issues in lithium-ion batteries by maintaining strong adhesion and stability at high temperatures, enhancing the battery's capacity retention and durability.
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
Lithium-ion batteries face issues with rapid capacity loss due to the separation of electrolytic copper foil and negative electrode active material caused by the large thermal expansion of composite active materials, leading to reduced charge/discharge capacity retention rates and frequent battery replacement.
A copper foil with a matte and shiny surface, coated with a protective layer, exhibits a maximum power difference of 1.5 mW or less and a maximum peak temperature of 200°C or higher, ensuring strong adhesion to the active material even at high temperatures.
The copper foil maintains excellent charge-discharge characteristics and stability, preventing decomposition of the active material, thereby extending the battery's lifespan and capacity retention rate.
Smart Images
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