Separator for Power Storage Device, and Power Storage Device

Provided are a thin-film separator for a power storage device, the separator having high strength and reduced clogging, and a power storage device separator that provides high strength, high level of safety, and high dimensional stability at high temperature, and that can be formed in a thin film. O...

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Bibliographische Detailangaben
Hauptverfasser:	Saito, Mitsuko, Takahashi, Masaki, Hamasaki, Shinya, Tagawa, Tomoya
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	Provided are a thin-film separator for a power storage device, the separator having high strength and reduced clogging, and a power storage device separator that provides high strength, high level of safety, and high dimensional stability at high temperature, and that can be formed in a thin film. One aspect provides a power storage device separator comprising a fine-porous layer (X) consisting mainly of polyolefin (A), the fine-porous layer (X) having a melt flow rate of less than or equal to 0.9 g/10 min, and having an average long-hole diameter of more than or equal to 100 nm according to MD-TD surface observation or ND-MD cross-sectional observation with a scanning electron microscope.