Polyimide Fiber Separator is a high-porosity battery separator made from polyimide (PI) nanofiber materials. It provides excellent thermal stability, high porosity, and good electrolyte transport capability for lithium-ion battery research and high-temperature battery applications.
Key Features
- High Thermal Stability: Operating
temperature range of -160 to +350℃.
- High Porosity: Porosity ≥35% with 0.6 ± 0.2
μm average pore diameter.
- High Mechanical Strength: Tensile strength
≥80 MPa (MD) and ≥60 MPa (TD).
- Battery Applications: Suitable for secondary
lithium batteries and high-temperature battery research.
Technical Specifications
Handling & Cell Assembly Notes
The following recommendations are provided for battery assembly processes:
- Before cell assembly, the PI separator can be baked above 100℃ for 2–3 hours to remove moisture.
- Cell components may require drying above 100℃ for approximately 24 hours until no residual moisture is detected.
- Electrolyte filling amount may need to be increased by approximately 5–8% compared with conventional separators.
- After standard constant-current and constant-voltage formation, two additional cycles are recommended to further activate electrode materials.
- During the winding process, avoid excessive separator stretching and reduce equipment tension.
