Ceramic Coated Separator 7 μm PE membrane for Li-ion Battery


Model Number: 7LP+3
Material: PE Base Film
Coating: Ceramic coated

Our ceramic coated separator is the essential material for lithium-ion batteries (LIB) which has been used in the broad fields of LIB application for many years.


Improved Battery Safety
Longer Battery Cycle Life
Higher Battery Performance

Product Description

7LP+3 ceramic coated separator is fabricated of 7μm thickness PE base film, and its surface is coated with a nano-scale Al2O3 layer. After special chemical printing treatment, the Al2O3 material is printed on the surface of the base film, which significantly improves the high-temperature stability of lithium-ion batteries and enhances battery safety. 7LP+3 separators are safe and durable battery separator solutions for high-power performance lithium-ion batteries.


Benefits of 7 μm Ceramic Coated Separator


  • Low TD/MD shrinkage reduces internal shorting.
  • Uniform pore structure with high chemical & thermal stability.
  • High porosity for excellent high-rate performance.
  • The ceramic coating layer provided superior high-temperature melt integrity.
  • Offers exceptional safety and longevity for energy applications.


Primary Applications

• Consumer electronics batteries such as notebooks, mobile phones, and digital cameras (mainly pouch type of cell)
• High safety and high-frequency charge batteries for electric vehicles(large cell package)
• Fast charging and discharging batteries for electric storage systems (large cell package)
• Other types of cells(e.g., cylindrical)


Typical Properties


Film Properties Unit of Measure Typical Value
Overall Thickness μm 10±1.5
Base Film Thickness μm 7±1
Ceramic(Al2O3) Layer Thickness μm 3±1
Gurley (JIS) Seconds/100ml 170±40
Porosity(calculated) % 40±4
TD Shrinkage @ 130℃ / 1 hours  % ≤3
MD Shrinkage @ 130℃ / 1 hours  % ≤3
TD Tensile Strength  Mpa ≥130
MD Tensile Strength  Mpa ≥130
Puncture Strength  Grams Force (gf) ≥350
Finished Arch mm/1m ≤2
Static Value KV ≤3
Moisture PPM ≤1200
Peel Strength N/cm ≥0.5


Learn more about YOUME lithium ion separator

Functional coatings available

Ceramic coatings

Improved oxidative stability, wettability, short prevention, and excellent structural integrity at an elevated temperature while maintaining overall separator thickness.

Adhesive coatings

Adhesive coatings can improve wettability and provide strong electrode adhesion. Therefore, it can enhance the integrity, safety, and cycle life of the battery cell.

Combined Coatings

We provide combined coating solutions to meet customers’ various needs. Combined coating contributes to chemical stability and thermal stability within the battery cell.



  • Single package size: 60X45X28 cm
  • Single gross weight: 18.0 kg
  • Package-Type: paper carton

Why Choose us?

Quick response to technical requirements with an optimum separator solution for you.

Our product and manufacturing technology provide stable supply capacity and excellent quality.

Well-established capability from R&D to high‐volume supply for membrane coating.

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