High-Performance Copper Foil Rolls for Lithium Ion Battery, Size: 25 µm

Technical Specification:

1. Material Composition:
   • Material: High-purity Copper (Cu).
     • Purity: ≥99.9%, ensuring excellent electrical conductivity and minimal impurities.
2. Physical Dimensions:
   • Thickness: 25 µm.
     • Robust thickness for enhanced mechanical strength and reliability during manufacturing and operation.
   • Width: Customizable based on application requirements (common range: 50–500 mm).
   • Roll Length: Typically 300–1000 meters, depending on roll size and intended use.
3. Mechanical Properties:
   • Tensile Strength: High mechanical durability to resist tearing during manufacturing.
   • Ductility: Flexible for use in various battery cell geometries (cylindrical, prismatic, or pouch cells).
4. Thermal and Electrical Properties:
   • Electrical Conductivity:
     • Exceptional performance for efficient electron flow as a current collector.
   • Thermal Conductivity:
     • Excellent heat dissipation, critical for high-power applications to manage thermal loads.
5. Surface Treatment:
   • Options:
     • Electroplating or double-sided roughening for improved adhesion with active materials (e.g., graphite, silicon-based anodes).
     • Anti-oxidation coatings to enhance durability and reduce surface degradation.
6. Chemical Resistance:
   • Treated surfaces provide resistance to oxidation and ensure compatibility with lithium-ion battery electrolytes.
7. Packaging:
   • Supplied in tightly wound rolls with protective layers to prevent surface contamination or mechanical damage.

Applications:

1. Primary Applications:
   • Current Collector for Lithium-Ion Batteries:
     • Serves as the substrate for anode materials, supporting active material coatings while facilitating electron transport.
2. Industries:
   • Battery Manufacturing:
     • Integral for lithium-ion cell production across consumer electronics, electric vehicles, and energy storage systems.
   • Electric Vehicles (EVs):
     • Key component in high-capacity, energy-dense battery packs for EVs.
   • Energy Storage Systems (ESS):
     • Used in grid-scale and modular renewable energy storage solutions.
   • Consumer Electronics:
     • Essential for compact batteries in smartphones, laptops, and other portable devices.
3. Advantages for Applications:
   • Enhanced Thickness:
     • Provides increased durability and handling ease compared to ultra-thin foils (e.g., 10 µm), while maintaining lightweight properties.
   • High Conductivity:
     • Low electrical resistance ensures efficient battery performance.
   • Improved Thermal Management:
     • High thermal conductivity helps dissipate heat during charging and discharging.
   • Customizable Surface:
     • Treated surfaces enhance adhesion with active materials and improve cycle life.
4. Specialized Uses:
   • High-Performance Batteries:
     • Suitable for batteries requiring reliable performance in high-current or high-capacity applications.
   • Silicon-Based Anode Development:
     • Supports next-generation battery chemistries with high-capacity anodes.
   • Research and Development:
     • Used in prototyping and testing advanced battery materials and designs.
5. Challenges and Mitigation:
   • Oxidation Risk:
     • Copper may oxidize, affecting conductivity.
       • Solution: Use anti-oxidation treatments or handle in controlled environments.
   • Handling Complexity:
     • Thinner foils can be challenging to handle during high-speed processing.
       • Solution: Employ advanced tension control and precision equipment.
   • Active Material Adhesion:
     • Poor bonding can lead to delamination and reduced battery life.
       • Solution: Opt for treated or roughened copper surfaces.

Summary:

The High-Performance Copper Foil Rolls, with a thickness of 25 µm, are ideal for use as anode current collectors in lithium-ion battery manufacturing. Their robust mechanical properties, excellent electrical and thermal conductivity, and surface treatment options make them indispensable for electric vehicles, energy storage systems, and consumer electronics. The slightly thicker profile ensures improved durability and handling without compromising performance, supporting reliable and efficient battery designs.