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 FS3002-23 FS3005-25 FS3006-25
Material composition Polyester/Ceramic Polyester/Ceramic Polyester/Ceramic
Thickness [µm] 23 25 25
Area Weight [g/m²] 33 35 33
Theoretical Porosity [%] 56 55 49
Gurley Value (100ml) [s] 100 100 75
Mixed Penetration Strength [N] 500 550 800
Ionic Resistance [(mΩ·cm²)/μm] 160 180 150
Wettability [cm²] >12 >12 >12
Modulus at 2% Elongation (md) [N/5cm] 17 22 21
Tensile Strength (md) [N/5cm]
kgf/cm²
30
270
35
290
34
282
Tensile Strength (cd) [N/5cm]
kgf/cm²
12
108
15
124
11
91
Free Shrinkage (200°C/1h) [%] <1 <1 <1
We are using cookies to guarantee the best possible website experience. By continuing to use our site, you agree that we can place these cookies on your computer. More on our Cookie page.

Get more insights

The Sites of Freudenberg Performance Materials