Nonaqueous electrolyte secondary battery separator, nonaqueous electrolyte secondary battery laminated separator, nonaqueous electrolyte secondary battery member, and nonaqueous electrolyte secondary battery

Nonaqueous electrolyte secondary battery separator, nonaqueous electrolyte secondary battery laminated separator, nonaqueous electrolyte secondary battery member, and nonaqueous electrolyte secondary battery

Provided is a nonaqueous electrolyte secondary battery separator including a porous film containing, as a main component, polyolefin having a weight average molecular weight of not less than 500,000, the nonaqueous electrolyte secondary battery separator having an MD orientation ratio of 58% to 80%,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Takata, Atsuhiro, Sembara, Masateru, Hamamatsu, Hiroshi
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 is a nonaqueous electrolyte secondary battery separator including a porous film containing, as a main component, polyolefin having a weight average molecular weight of not less than 500,000, the nonaqueous electrolyte secondary battery separator having an MD orientation ratio of 58% to 80%, a degree of MD orientation of 70% to 80%, and a degree of TD orientation of 65% to 85%, the nonaqueous electrolyte secondary battery separator having a film thickness of not more than 14 μm, and the nonaqueous electrolyte secondary battery separator being excellent in shutdown temperature and puncture strength.