Alumina Coated Battery Separator, PE Base 20μm, 60 mm x 600 m, Double-Side Coated
Product Overview
This alumina (Al2O3) ceramic coated polyethylene separator is supplied in a 60 mm roll format. The specification describes a 16 μm PE base film and a 4 μm alumina coating for the 20 μm separator structure.
Product Details
| Product name | Alumina Coated Battery Separator, PE Base 20μm, 60 mm x 600 m, Double-Side Coated |
| Product format | (12+2+2)μm x 60 mm x 600 m long |
| Process and coating configuration | Double-sided ceramic coating |
| Base material | Polyethylene (PE) |
| Coating | Alumina (Al2O3) ceramic |
| Total thickness | 20 ± 2 μm |
| Base-film thickness | 16 μm |
| Al2O3 coating thickness | 4 μm |
| Width | 60 mm |
| Roll length | 600 m |
| Air permeability | 180 ± 60 sec/100 ml |
| Porosity | 44 ± 5% |
| Areal density | 13 ± 1 g/m² |
| Puncture strength | >600 g |
| Tensile strength MD / TD | >1600 / >1500 kgf/cm² |
| Thermal shrinkage MD / TD | <=2.5% / <=2.0% after 2 h at 90 °C |
| Coating configuration | Double-side ceramic coating |
Additional Information
PE base film: 12 μm. Both sides are coated with 2 μm alumina ceramic, for double-side ceramic coating.
Important Note
Note: Slight variations may occur between different production lots of the battery separator. The performance indicators are guaranteed to comply with our product specifications.
Related Products
| Research Need | Related Product | Best For |
|---|---|---|
| Compare nearby specifications | Alumina Coated Battery Separator, PE Base 20μm, 60 mm x 1000 m, Single-Side Coated | Same Alumina PVDF coated separator family for direct specification comparison. |
| Review same-family format | Alumina PVDF Coated Battery Separator, PE Base 17μm, 63.5 mm x 450 m, Single-Side Double-Coated | Same Alumina PVDF coated separator family for direct specification comparison. |
| Check alternate thickness | Alumina Coated Battery Separator, PE Base 20μm, 60 mm x 100 m, Single-Side Coated | Same Alumina PVDF coated separator family for direct specification comparison. |
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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What is the thermal shrinkage performance of the 20 μm double-side alumina-coated PE separator, and how does it affect cell safety?
The separator exhibits a thermal shrinkage of ≤2.5% in the machine direction (MD) and ≤2.0% in the transverse direction (TD) after 2 hours at 90 °C. This low shrinkage helps maintain electrode isolation and reduces the risk of internal short circuits during battery operation or mild thermal excursions.
How does the double-side alumina coating affect the separator's air permeability and porosity compared to uncoated PE?
The double-side ceramic coating adds 4 μm total thickness (2 μm per side) to the 16 μm PE base, resulting in a total thickness of 20 ± 2 μm. The air permeability is 180 ± 60 sec/100 ml and porosity is 44 ± 5%, indicating that the coating does not significantly block ionic transport, which is critical for maintaining low internal resistance in lithium-ion cells.
What mechanical strength does the 20 μm alumina-coated separator provide, and what are the implications for roll-to-roll processing?
The separator has a puncture strength greater than 600 g and tensile strengths exceeding 1600 kgf/cm² (MD) and 1500 kgf/cm² (TD). These mechanical properties ensure resistance to dendrite penetration and allow the 60 mm × 600 m roll to be handled in automated winding and stacking processes without tearing or deformation.
This double-side alumina-coated PE separator (12+2+2 μm, 60 mm × 600 m) offers a balanced combination of high puncture strength (>600 g) and tensile strength (>1600/1500 kgf/cm² MD/TD) with controlled thermal shrinkage (≤2.5%/2.0% MD/TD at 90°C), making it suitable for lithium-ion cell prototyping where mechanical robustness and dimensional stability are critical. The 20 μm total thickness and 44% porosity support electrolyte wetting, but the 180 ± 60 sec/100 ml air permeability range indicates a moderate trade-off in ionic transport that must be validated for specific electrode loadings.
Positive
- High mechanical robustness: Puncture strength >600 g and tensile strength >1600/1500 kgf/cm² (MD/TD) provide resistance to dendrite penetration and handling stresses during cell assembly, reducing short-circuit risk in lab-scale pouch or coin cells.
- Controlled thermal shrinkage: Thermal shrinkage ≤2.5% MD and ≤2.0% TD after 2 h at 90°C ensures dimensional stability during drying or mild thermal exposure, minimizing electrode misalignment in stacked or wound cell configurations.
Trade-offs
- Air permeability variability: Air permeability is specified at 180 ± 60 sec/100 ml, a ±33% tolerance band that may affect ionic resistance consistency across batches, requiring lot-to-lot validation for high-rate or high-energy-density cell designs.
- Coating thickness sensitivity: The 4 μm alumina coating (2 μm per side) is thin and may be prone to pinhole defects or non-uniform coverage under non-optimized coating conditions, potentially compromising thermal shutdown or electrical insulation in aggressive cycling.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
