Li-Ion Battery Separator Film, Length: 800 m, Width: 85 mm, Thickness: 25 μm

Technical Specification:

1. Material Composition:
   • Base Material: Microporous Polyethylene (PE) or Polypropylene (PP).
     • Provides excellent thermal stability, chemical resistance, and mechanical durability.
   • Optional Coating:
     • Ceramic or Polymer Coating for improved thermal shutdown properties and enhanced safety.
2. Physical Dimensions:
   • Thickness: 25 μm.
     • Optimized for efficient ionic conductivity and robust mechanical performance.
   • Width: 85 mm.
     • Suitable for a variety of battery electrode sizes and formats.
   • Length: 800 meters per roll.
   • Porosity: Typically 35–50%, enabling efficient ion transport.
3. Electrochemical Properties:
   • Ionic Conductivity:
     • Uniform pore structure facilitates effective ion transfer between electrodes.
   • Electrolyte Wettability:
     • Compatible with lithium-ion electrolytes for enhanced performance.
   • Thermal Stability:
     • Resistant to temperatures up to 120°C (higher for ceramic-coated separators).
4. Mechanical Properties:
   • High Tensile Strength:
     • Prevents tearing during assembly or under operational stresses.
   • Puncture Resistance:
     • Ensures durability, even against sharp electrode edges.
5. Thermal Properties:
   • Shutdown Mechanism:
     • Heat-sensitive separators can close pores at elevated temperatures, preventing thermal runaway.
   • Thermal Endurance:
     • Operates reliably in a temperature range of -20°C to 120°C.
6. Chemical Resistance:
   • Compatible with various electrolytes, including liquid and gel-based lithium-ion systems.

Applications:

1. Primary Applications:
   • Lithium-Ion Battery Separator:
     • Serves as a critical barrier between anode and cathode, preventing short circuits while allowing ionic flow.
2. Industries:
   • Battery Manufacturing:
     • Integral to lithium-ion and solid-state battery production for various formats (pouch, cylindrical, and prismatic cells).
   • Electric Vehicles (EVs):
     • Essential for high-energy-density battery packs used in electric vehicles.
   • Consumer Electronics:
     • Powers smartphones, tablets, laptops, and other portable devices.
   • Energy Storage Systems (ESS):
     • Applied in grid-scale and renewable energy storage solutions.
3. Advantages for Applications:
   • High Ionic Conductivity:
     • Ensures efficient battery operation with low internal resistance.
   • Thermal Stability:
     • Protects against thermal runaway in high-temperature environments.
   • Mechanical Strength:
     • Provides robust performance during assembly and long-term operation.
   • Customizable Dimensions:
     • Tailored widths and lengths fit various battery configurations.
4. Specialized Uses:
   • Advanced Energy Storage:
     • Suitable for cutting-edge battery systems with high power and energy requirements.
   • Solid-State Battery Development:
     • Acts as a base layer in hybrid solid-state systems.
   • High-Performance Batteries:
     • Used in batteries designed for aerospace, medical devices, and other demanding applications.
5. Challenges and Mitigation:
   • Thermal Deformation:
     • Uncoated separators may deform under extreme heat.
       • Solution: Use ceramic-coated separators for enhanced thermal resistance.
   • Tearing During Assembly:
     • Thin films are prone to damage during high-speed handling.
       • Solution: Employ precision handling systems with tension control.

Summary:

The Li-Ion Battery Separator Film, with a thickness of 25 μm, width of 85 mm, and roll length of 800 meters, is a high-performance material critical for lithium-ion battery manufacturing. Its optimized porosity, thermal stability, and mechanical durability make it ideal for applications in electric vehicles, consumer electronics, and energy storage systems. Optional coatings enhance safety and performance, supporting the development of reliable and high-efficiency batteries.