Battery separator and battery containing same

The present invention provides a battery separator comprising (a) a nonwoven web of fibers having a mean diameter of about 15 mu m or less and (b) a graft polymerized monomer on the surface of the nonwoven web which renders the nonwoven web spontaneously wettable by an alkaline electrolyte, wherein...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PETER JOHN DEGEN, JOSEPH YUEN LEE
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BRAIDING COTTON-WOOL ELECTRICITY FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL NON-WOVEN FABRICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TEXTILES TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	The present invention provides a battery separator comprising (a) a nonwoven web of fibers having a mean diameter of about 15 mu m or less and (b) a graft polymerized monomer on the surface of the nonwoven web which renders the nonwoven web spontaneously wettable by an alkaline electrolyte, wherein the nonwoven web comprises at least about 60 wt.% of a first polyolefin having a first melting temperature and no more than about 40 wt.% of a second polyolefin having a second melting temperature which is lower than the first melting temperature, the nonwoven web has been subjected to a temperature between the first and second melting temperatures, and the nonwoven web has a thickness of at least about 50 mu m. The present invention also provides a battery containing such a battery separator, as well as a method of preparing such a battery separator and battery.