Separator for secondary battery with high heat resistance

The present invention relates to a separator comprising: a porous substrate film; and a heat-resistant layer formed on at least one side of the porous substrate film, wherein the heat-resistant layer comprises a PVDF copolymer and inorganic particles, and the PVDF copolymer has a crystallinity of 10...

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Bibliographische Detailangaben
Hauptverfasser:	LEE, JIN WOO, JUNG, JOO YOUNG, HA, PYUNG SOO, OH, EUNG JAE
Format:	Patent
Sprache:	chi ; 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:	The present invention relates to a separator comprising: a porous substrate film; and a heat-resistant layer formed on at least one side of the porous substrate film, wherein the heat-resistant layer comprises a PVDF copolymer and inorganic particles, and the PVDF copolymer has a crystallinity of 10% to 40% as measured by a DSC. The separator has excellent heat resistance and electrolyte impregnability, is capable of high capacity/high output, and therefore is useful as a secondary battery separator.