Description
Li-Ion Battery Separator Film – 25 μm Thickness, 800 m Length, 85 mm Width
The Li-Ion Battery Separator Film is a vital component in lithium-ion cell construction. It is a microporous membrane designed to physically separate the anode and cathode, preventing internal short circuits while ensuring optimal ionic conductivity. With excellent mechanical strength, thermal stability, and chemical resistance, this separator film is ideal for both R&D and commercial lithium-ion battery applications.
This product offers outstanding uniformity, low thermal shrinkage, and high puncture resistance — essential for achieving high-performance and safe energy storage in demanding environments such as electric vehicles, portable electronics, and energy storage systems.
Technical Properties
| Property | Specification |
|---|---|
| Thickness | 25 μm |
| Width | 85 mm |
| Length | 800 m |
| Gurley (JIS Standard) | 620 seconds |
| TD Shrinkage @ 90°C (1 hr) | 0% |
| MD Shrinkage @ 90°C (1 hr) | 5% |
| Porosity | 39% |
| Pore Size | 0.21 × 0.05 μm |
| Puncture Strength | 380 grams |
| Tensile Strength (MD) | 1700 kg/cm² |
| Tensile Strength (TD) | 150 kg/cm² |
Applications
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Battery R&D and Prototyping
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Electric Vehicles & Hybrid Cars
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Consumer Electronics (Phones, Laptops, Tablets)
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Power Tools & Portable Devices
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Grid-level Energy Storage Systems
This separator film is ideal for battery designs requiring high safety standards, uniform porosity, and mechanical stability. It ensures effective ion transport while minimizing the risk of internal short-circuiting.
Graphene Integration in Lithium-Ion Cells
The separator’s role becomes even more critical when combined with next-generation electrode materials such as graphene.
Graphene in Cathodes:
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Used as lithium metal oxide–graphene composites
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Improves electrochemical performance and lithium-ion diffusion
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Enhances structural and voltage-range stability
Graphene in Anodes:
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High conductivity and ultra-thin architecture (surface area: 2620 m²/g)
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Excellent flexibility, low diffusion distance, and thermal resistance
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Boosts durability in harsh cycling environments
By integrating graphene materials with high-performance separators like this film, lithium-ion batteries reach new benchmarks in energy density, cycle life, and safety.