separator solutions for your applications

Ceramic sheet separators for lithium ion batteries

Advanced materials using innovative ceramic impregnation technology

Ceramic sheet separators by Freudenberg Performance Materials are manufactured in a two-step process:

Separators

 

Step1: A thin polyester nonwoven base is manufactured in a wet laid process. The thermal stability of the separator is guaranteed by carefully selecting adequate microfibers. 

Separators

 

Step 2: Inorganic particles are impregnated throughout the nonwoven in a water-based process using binders optimized specifically for use in lithium ion batteries. The solvent is then dried, leaving behind a microporous structure with defined properties.

 

 

The cross-sectional view shows the unique single-layer construction of the ceramic sheet separators, which ensures uniform porosity throughout the material. With their superior mechanical properties, our separators can be used in all common cell designs: cylindrical, jelly flat, z-fold or separator stack design.

Our Lithium Ion battery separators:

Material FS 3011-23 FS 3009-25 FS 3012-19
Material composition Polyester/Ceramic Polyester/Ceramic Polyester/Ceramic
Thickness [µm] 23 25 19
Area Weight [g/m²] 33 35 29
Theoretical Porosity [%] 55 55 53
Gurley Value (100ml) [s] 110 100 70
Tensile Strength (md) [N/5cm]
kgf/cm²
30
270
40
332
16
175
Tensile Strength (cd) [N/5cm]
kgf/cm²
12
108
15
124
7
65
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