Impact of Die Exit Temperature on the Crystalline Orientation and Performance of Polypropylene Battery Separators

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This study examines how die exit temperature influences crystalline orientation and electrolyte uptake in battery separators.

Lower die exit temperatures enhance crystalline orientation, improving pore structures in polypropylene battery separators.
At 215 °C, separators demonstrated an electrolyte uptake of 109.4% and superior pore morphology.
Battery performance tests indicated that separators produced at lower temperatures achieve higher charge storage capacity.
Optimizing die exit temperature is vital for enhancing the performance and safety of lithium-ion battery separators.

Kerdthong et al. (2025) studied this question.

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