PI Solid-state Battery Separator Solid Electrolyte Separator Lithium-ion Battery High Temperature Resistant Heat Stable Polyimide
Product Overview
Xwell Research's polyimide (PI) separators are high-performance membranes designed for next-generation battery systems, including solid-state and sodium-ion batteries. With exceptional thermal stability (-160°C to 350°C) and optimized porosity (42%), these separators enable safer and more efficient energy storage solutions for research laboratories and industrial applications.
Key Specifications
| Parameter |
PI-40 |
PI-80 |
| Thickness Options |
16/20/25 μm |
16/20/25 μm |
| Density |
0.81 g/cm³ |
0.81 g/cm³ |
| Porosity |
42% |
42% |
| Air Permeability |
3 sec |
3 sec |
| Tensile Strength (MD) |
94 MPa |
94 MPa |
| Puncture Resistance |
400g |
400g |
Material Advantages
-
Extreme Temperature Performance
- Stable operation from -160°C to 350°C (surpassing conventional PP/PE separators)
- No thermal shrinkage at high temperatures
-
Mechanical Robustness
- Superior puncture resistance (400g) for lithium metal anode compatibility
- Balanced MD/TD tensile strength (94/64 MPa)
-
Electrochemical Optimization
- 42% porosity enables 5% higher electrolyte absorption vs. standard separators
- Low impedance for high-rate applications
Handling & Processing Guidelines
- Pre-Treatment
- Bake at >100°C for 2-3 hours (moisture removal)
- Cell Assembly
- Maintain winding tension <0.5N to prevent stretching
- Electrolyte Filling
- Use 5% more electrolyte than conventional separators
- Formation Protocol
- Add 2 extra charge-discharge cycles post CV/CC formation
Packaging & Storage
| Attribute |
Specification |
| Packaging |
Roll + Vacuum-sealed bag + Foam padding |
| Storage Temperature |
0°C to 35°C |
| Relative Humidity |
≤75% |
| Shelf Life |
12 months in original packaging |
Applications
- Solid-State Battery Research
- Sodium-Ion Battery Development
- High-Temperature Battery Systems
