Economic PE (Polyethylene) Disc & Roll (T=20 um, L=100-1500m) as Battery Separator, CBSPE
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PE (Polyethylene) separator is favored for its superior thermal shutdown characteristics and its ability to be made into thinner, more porous membranes. The key features of PE separator are shown below: (1) Low Melting Point (~135°C): This is the "Goldilocks" temperature for safety. It is high enough for normal operation but low enough to melt and "shut down" the battery (by clogging the pores) before the cell reaches the point of thermal runaway. (2) High Porosity: PE membranes are typically manufactured using a "wet process," which allows for much higher porosity (up to 50%) and more uniform pore distribution compared to the dry-stretched PP process. (3) Flexibility: PE is more flexible and less brittle than PP, making it easier to wind into the tight cylindrical shapes required for 18650 or 21700 cells.
Unlike the dry process used for PP (which relies on mechanical stretching), PE separators are usually made through Phase Inversion (The Wet Process).
| Part Number |
CBSPE (C-BS-PE) |
| Material |
PE (Polyethylene) |
| Dimension |
Round Disc: Φ16 or 19 mm, T 20 um (100 pcs/pack) Roll: (1) T 20 um * W60 mm * L100 m (1 roll/pack) (2) T 20 um * W60 mm * L500 m (1 roll/pack) (3) T 20 um * W60 mm * L1500 m (1 roll/pack) (Roll with other width and length can be provided upon request) |
| Parameters |
Area Density Porosity Penetration Strength T20 um: 11.0 g/m2 41% 722 g |
| Melting Temperature |
~135 ℃ |
References:
- L. Sheng, et al. The morphology of polyethylene (PE) separator for lithium-ion battery tuned by the extracting process, J. Electroanalytical Chem., 2020, 873, 114391.
- D. M.D. Babiker, et al. Recent progress of composite polyethylene separators for lithium/sodium batteries, J. Power Sources, 2023, 564, 232853.
