SECONDARY BATTERY SEPARATION MEMBRANE INCLUDING DOUBLE POROUS COATING LAYERS OF INORGANIC PARTICLES HAVING DIFFERENT SURFACE PROPERTIES, SECONDARY BATTERY INCLUDING SAME, AND METHOD FOR MANUFACTURING SEPARATION MEMBRANE

Title:

Document Type and Number:

WIPO Patent Application WO/2014/084681

Kind Code:

A1

Abstract:

The present invention relates to a secondary battery separation membrane including double porous coating layers of inorganic particles having different surface properties, a secondary battery including the same, and a method for manufacturing the separation membrane. According to one embodiment of the present invention, provided is the secondary battery separation membrane comprising: a porous substrate; a first porous coating layer; and a second porous coating layer. According to another embodiment of the present invention, provided is the method for manufacturing the secondary battery separation membrane, comprising the steps of: forming a first slurry; forming a second slurry; forming the first porous coating layer; and forming the second porous coating layer. The separation membrane, according to one aspect of the present invention, in which the inorganic particles are uniformly dispersed within the coating layers thereof, can maintain battery stability by adsorbing excessive metal ions in the battery which are generated if the temperature of the battery exceeds a normal operation temperature range.

Inventors:

LEE JOO-SUNG (KR)
SUNG DONG-WOOK (KR)
KA KYUNG-RYUN (KR)
KIM JONG-HUN (KR)

Application Number:

PCT/KR2013/011035

Publication Date:

June 05, 2014

Filing Date:

November 29, 2013

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

H01M50/403; H01M50/443; H01M50/457

Foreign References:

KR20030094696A	2003-12-18
KR20100120137A	2010-11-12
US20090325074A1	2009-12-31
KR20100084638A	2010-07-27
KR20060033029A	2006-04-18
KR20070083975A	2007-08-24
KR20070019958A	2007-02-16

Other References: