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Polypropylene Base Lithium Ion Battery SeparatorMembranewith Excellent PropertyPrepared by Melt-Blown Method

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KeyWords： Melt-Blown; Separator Membrane; Lithium Ion Battery; Thermal Barrier Property

ClassificationCode：TQ15

year,volume(issue):pagination： 2015,35(6):33-39

Abstract：

Novel polypropylene based separators for lithium ion battery (LIB) was successfully prepared via melt-brown method. Compared with commercial polypropylene based separators, melt-blown separator exhibited both higher mechanical strength and improved absorption rate and wet ability for electrolyte, relating to its inter-connected inside continuous micro-fibrous structures. Due to its excellent properties, the capacity and cycling stability of LIBs assembled with novel melt-brown separator were greatly improved at higher charging or discharging rates. The thermal property measurement for the separator from melt-brown method also showed superior thermal barrier property, which may enhance the safety of lithium ion battery.

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