SEPARATOR SUITABLE FOR USE IN LITHIUM ION BATTERIES

The invention pertains to a separator suitable for use in lithium ion batteries which comprises a core paper comprising 30-70 wt.% aramid shortcut fiber, 10-45 wt.% PET, and 5-40 wt.% of a binder, the core paper having a grammage of 5-30 g/m2 and a thickness of 5-30 micron, wherein at least one side...

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Bibliographische Detailangaben
Hauptverfasser:	BOS, Johan, MUGGE, Edo, TIECKEN, Jan Cees, VISSER, Richard, VU, Yen
Format:	Patent
Sprache:	eng ; fre ; ger
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 invention pertains to a separator suitable for use in lithium ion batteries which comprises a core paper comprising 30-70 wt.% aramid shortcut fiber, 10-45 wt.% PET, and 5-40 wt.% of a binder, the core paper having a grammage of 5-30 g/m2 and a thickness of 5-30 micron, wherein at least one side of the core paper is provided with a coating layer, said coating layer comprising refractory particles and a coating binder, wherein the separator has a surface pore size on the side of the paper provided with the coating layer which is such that at least 90 number% of the surface pores has a pore size of at most 0.5 micron. The separator according to the invention combines low thickness, good dimensional stability, and good thermal stability and thermal conductivity with good barrier properties. Manufacture and use of the separator are also claimed.