Carbon-Coated Aluminum Foil for Li-Ion Cathode Material, Thickness: 20μm

Technical Specification:

1. Material Composition:
   • Base Material: High-purity aluminum foil (≥99.9% purity).
   • Coating: Conductive carbon layer applied uniformly over the surface.
2. Physical Properties:
   • Thickness: 20 µm (including aluminum and carbon coating).
     • Typically, the aluminum base thickness is around 15–18 µm, with a carbon coating thickness of 2–5 µm.
   • Width: Standard or customizable based on battery design requirements.
3. Surface Properties:
   • Carbon Coating:
     • Surface resistivity: < 10 Ω/sq (varies depending on the specific formulation).
     • Ensures uniform conductivity and improved contact resistance.
   • Adhesion Strength: High adhesion between the carbon layer and aluminum foil, ensuring mechanical stability during battery assembly.
4. Thermal Properties:
   • Thermal Conductivity: Excellent heat dissipation properties due to the aluminum base.
   • Thermal Stability: Coating and foil stable at operational temperatures of lithium-ion batteries.
5. Chemical Stability:
   • Coating prevents oxidation of the aluminum surface, improving long-term reliability.
   • Compatible with a wide range of cathode materials, including LiCoO₂, NMC, LiFePO₄, and LiNiCoAlO₂.
6. Electrical Properties:
   • Enhanced Conductivity: Carbon coating improves electron transport and reduces interfacial resistance.
   • Contact Resistance: Lower than uncoated aluminum foil, enhancing overall battery performance.

Applications:

1. Primary Applications:
   • Current Collector for Cathodes in Lithium-Ion Batteries:
     • Provides a stable and efficient interface for cathode active materials.
2. Industries:
   • Electric Vehicles (EVs):
     • Used in high-energy-density battery packs for EVs, plug-in hybrids, and electric bikes.
   • Portable Electronics:
     • Integral in lithium-ion batteries for smartphones, laptops, and tablets.
   • Energy Storage Systems (ESS):
     • Applied in renewable energy storage solutions and grid-level battery systems.
   • Aerospace and Defense:
     • Essential for lightweight, high-performance energy storage.
3. Advantages for Applications:
   • Improved Conductivity:
     • Carbon coating reduces internal resistance, enhancing charge/discharge efficiency.
   • Reduced Oxidation:
     • Protects aluminum from corrosion, extending battery lifespan.
   • Enhanced Adhesion:
     • Better bonding with cathode materials, ensuring uniform electrode fabrication.
   • Thermal Management:
     • Facilitates heat dissipation, preventing overheating in high-performance applications.
4. Specialized Uses:
   • High-Voltage Cathodes:
     • Compatible with advanced cathode chemistries operating above 4.5 V, such as NMC 811 and LiNi₀.₉Co₀.₀₅Mn₀.₀₅O₂.
   • Fast-Charging Batteries:
     • Supports high-current charge/discharge rates by minimizing resistance.
   • Research and Development:
     • Ideal for testing novel cathode materials in advanced battery technologies.
5. Challenges and Mitigation:
   • Coating Uniformity:
     • Uneven carbon coating can lead to performance variability.
       • Solution: Advanced coating techniques ensure uniform application.
   • Cost Considerations:
     • Higher cost than uncoated aluminum foil.
       • Solution: Optimized production processes for cost-effective scaling.

Summary:

Carbon-Coated Aluminum Foil (Thickness: 20 µm) is a critical component for lithium-ion battery cathodes, offering enhanced conductivity, corrosion resistance, and thermal management. It is widely used in applications such as EVs, portable electronics, and energy storage systems. The carbon coating improves the efficiency and lifespan of batteries by reducing interfacial resistance and ensuring better adhesion with active materials. This foil is essential for high-performance and next-generation lithium-ion batteries.