Organic/inorganic composite separator having morphology...

Details Organic/inorganic composite separator having morphology... Organic/inorganic composite separator having morphology...

2006-12-06

2009-12-29

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer, spacer or materials for use therewith

C429S129000, C429S247000

Reexamination Certificate

active

07638241

ABSTRACT:
Disclosed is an organic/inorganic composite separator including: a porous substrate having pores; and a porous active layer containing a mixture of inorganic particles and a binder polymer with which at least one surface of the porous substrate is coated. The organic/inorganic composite separator of the present invention may be useful to enhance peeling and scratch resistances and improve a lamination characteristic by introducing a porous active layer onto a porous substrate having pores, the porous active layer having heterogeneity of morphology toward a thickness direction in which a content ratio of the binder polymer/inorganic particles present in a surface layer is higher than that of the binder polymer/inorganic particles present inside the surface layer. Accordingly, the stability and performances of a battery can be improved together since the detachment of inorganic particles from the porous active layer may be reduced during the assembly process of the electrochemical device.

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International Search report for PCT/KR2006/005222 dated Mar. 19, 2007.
Written Opinion for PCT/KR2006/005222 dated Mar. 19, 2007.

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