PP Separator

PP-16/20/40 polypropylene (PP) battery separator is a microporous insulating membrane designed to physically separate the cathode and anode while enabling rapid lithium-ion transport through electrolyte-filled pores. In lithium-ion and sodium-ion style laboratory builds, separator selection directly influences internal resistance, rate capability, safety margin, and mechanical robustness during winding/stacking and cycling.

Key specifications (typical)

Available thickness grades (from the product sheet):

• 16 ± 2 μm, porosity 35–45%, Gurley 190–390 s/100 mL
• 20 ± 2 μm, porosity 37–47%, Gurley 250–450 s/100 mL
• 40 ± 2 μm, porosity 40–50%, Gurley 500–800 s/100 mL

Typical lab supply format is a roll (commonly listed as ~400 m length × ~50 mm width, with other widths often available depending on build method).

Compatibility and use cases

This PP separator is widely used for:

• Coin cells (CR2032), pouch cells, and small cylindrical prototypes
• LFP and other cathode chemistries where PP’s thermal/mechanical stability is preferred
• Electrolytes commonly used in Li-ion research (carbonate-based systems), where the separator’s wettability and pore structure support stable ionic conduction.
  
  

Why choose ScienceGears

ScienceGears supports researchers with a matched workflow: separator + electrode materials + cell hardware, plus measurement systems such as potentiostats/galvanostats and battery cyclers to validate rate performance, impedance (EIS), and cycling stability.