PP/PE/PP Trilayer Composite (Celgard 2325) Disc & Roll (T=25 um) as Battery Separator, CBSTP
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PE (Polyethylene) separator is a high-performance, "sandwich-style" composite membrane used primarily in large-scale lithium-ion batteries for electric vehicles (EVs) and energy storage systems. By laminating a middle layer of Polyethylene (PE) between two outer layers of Polypropylene (PP), manufacturers create a separator that is both a structural backbone and a high-speed safety fuse. The primary reason for using a trilayer structure is to exploit the different melting points of the two materials to prevent thermal runaway. Polyethylene (the middle layer) has a relatively low melting point of ~130°C to 135°C. Polypropylene (the outer layers) has a significantly higher melting point of ~165°C.
| Part Number |
CBSTP (C-BS-TP) |
| Material |
PP/PE/PP |
| Dimension |
Round Disc: Φ16 or 19 mm, T 25 um (100 pcs/pack) Roll: (1) C2325 W60 mm * L100 m * T25 um (1 roll/pack) (2) C2325 W60 mm * L400 m * T25 um (1 roll/pack) (3) C2325 W67 mm * L400 m * T25 um (1 roll/pack) (4) C2325 W85 mm * L58 m * T25 um (1 roll/pack) (5) C2325 W85 mm * L400 m * T25 um (1 roll/pack) (6) C2325 W85 mm * L800 m * T25 um (1 roll/pack) (Roll with other width and length can be provided upon request) |
| Parameters |
Thickness Porosity Puncture Strength C2325: 25 um 39% 450 gf |
References:
- W. D. Hsu, et al. Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries, Scientific Reports, 2021, 11, 1929.
- Y. Li, et al. Polypropylene/polyethylene multilayer separators with enhanced thermal stability for lithium-ion battery via multilayer coextrusion, Electrochimica Acta, 2018, 264, 140-149.
