PP/PE/PP Trilayer Composite Separator (SEP-PPE-25), Dry-Process Polyolefin Battery Separator with Zero TD Shrinkage and PE Shutdown Function for Lithium-Ion Batteries

About this item

• Trilayer Composite Structure with Shutdown Function: features a PP/PE/PP trilayer composite structure with a PE inner layer that provides high-speed shutdown capability at elevated temperatures, while the PP outer layers offer excellent oxidation resistance and thermal stability, ensuring enhanced safety during thermal runaway events
• Zero TD Shrinkage for Maximum Safety: exhibits zero TD shrinkage (0% at 90°C/1h) and only 5% MD shrinkage, significantly reducing internal short circuit risks caused by separator shrinkage at elevated temperatures and ensuring superior dimensional integrity during cell assembly and cycling
• Optimized Porosity & Fine Pore Structure: features a porosity of 39%, Gurley value of 620 seconds, and an ultra-fine average pore size of 0.028 μm, providing excellent ionic transport pathways while offering superior dendrite suppression and mechanical integrity
• High Mechanical Strength: provides high mechanical strength with MD tensile strength of 1700 kgf/cm², TD tensile strength of 150 kgf/cm², and puncture strength of 380 gf, ensuring robust processing during cell assembly and reliable long-term cycling performance
• Wide Chemical Compatibility & Application Range: offers excellent resistance to acids, alkalis, and most chemicals with outstanding oxidation resistance, suitable for various lithium-ion battery applications including coin cells, pouch cells, and cylindrical cells, compatible with a wide range of electrolyte systems