battery separator foils
Our high-performance battery separator films at a glance
Dr. Dietrich Müller GmbH is one of the leading manufacturers of Polyethylene-based separator films. Primary areas of application are Lithium batteries and accumulatorsMicroporous membranes with ultrafine, interconnected pore structures form the core element of our technology and enable optimal ion passage.
Features
• Good mechanical properties
• Chemical inactivity
• High melting temperature
Our new innovation in the field of
battery separator foils
Our new battery separator film technology is based on an electrochemically stable, highly heat-resistant polymer resin. Features of this innovation include:
- Height Resistance to slow puncture of foreign bodies in the cell
- Very high Thermal stability, without heat transfer up to 200°C
- excellent flame retardancy (Conformity with UL testing)
- Good Metal adhesion
- Very high dimensional stability up to 200°C (safety)
- Tunable, wide range of permeability and resistance (Power density)
- Improved electrolyte wetting (Cell production & lifespan)
- Little one narrow pore size from 10-35 nm (safety)
- High compressive strength (safety)
- Relative low tensile strength (Security)
- Compatibility and excellent wettability with ionic liquids (Next-Gen Electrolytes)
Height Dimensional stabilityt, good wettability, small pore size and low basis weight are outstanding properties of our battery separator films.
Our separator films at a glance
| Parameter | Tecfilm BSF TC 02064 | Tecfilm BSF TC 02063 | Tecfilm BSF TC 02062 |
|---|---|---|---|
| Average thickness in μm | 20 | 16 | 12 |
| Basis weight in g/m² | 10,5 | 8,4 | 5,5 |
| Porosity in % | 43 | 47 | 54 |
| Air permeability in seconds | 300 | 150 | 65 |
| Tensile strength (MD) in MPa | > 98 | > 98 | ~ 98 |
| Tensile strength (TD) in MPa | ~ 73 | ~ 68 | ~ 78 |
| Tensile elongation (MD) at break in % | 90 | 80 | 90 |
| Tensile elongation (TD) at break in % | 300 | 250 | 230 |
| Puncture resistance in g | 550 | 430 | 300 |
| Thermal shrinkage (MD) at 120°C, 1h in % | <10 | <10 | <12 |
| Thermal shrinkage (TD) at 120°C, 1h in % | <3 | <4 | <7 |
| Nominal porosity in % | 42-44 | 46-48 | 53-57 |
| Application Areas | Used in secondary lithium batteries for portable electronic devices such as laptops, tablets, mobile phones and digital cameras, but also military equipment. | Used in secondary lithium batteries with high discharge and charge speed for portable electronic devices such as cordless power tools, garden tools, RC vehicles and antenna systems. | Use in secondary lithium batteries with extremely low impedances for special applications such as drones. |