SEPARATOR COMPRISING BINDERS HAVING DIFFERENT GLASS TRANSITION TEMPERATURES, AND MANUFACTURING METHOD THEREFOR

Title:

SEPARATOR COMPRISING BINDERS HAVING DIFFERENT GLASS TRANSITION TEMPERATURES, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2019/135510

Kind Code:

A1

Abstract:

The present invention relates to a separator for a rechargeable battery, the separator comprising: a separator substrate formed from a polymer resin having a porous structure; a first coating layer coated on the separator substrate and comprising a first inorganic material and a first binder; and a second coating layer coated on the first coating layer and comprising a second inorganic material and a second binder, wherein the first coating layer comprises a third binder having a glass transition temperature (Tg) lower than 30°C, and the second coating layer comprises a fourth binder having a glass transition temperature of 30°C or higher.

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Inventors:

KIM MYEONG SOO (KR)
YOON SU JIN (KR)

Application Number:

PCT/KR2018/016116

Publication Date:

July 11, 2019

Filing Date:

December 18, 2018

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

H01M50/403; H01M50/417; H01M50/457; H01M50/489

Foreign References:

KR20160118986A	2016-10-12
KR20170112250A	2017-10-12
KR20170132349A	2017-12-01
KR20140055901A	2014-05-09
KR20160127473A	2016-11-04
JP2016072117A	2016-05-09
KR20060072065A	2006-06-27

Other References: