SEPARATOR AND ELECTROCHEMICAL DEVICE HAVING SAME

Title:

SEPARATOR AND ELECTROCHEMICAL DEVICE HAVING SAME

Document Type and Number:

WIPO Patent Application WO/2011/115376

Kind Code:

A2

Abstract:

The separator of the present invention comprises: (A) a porous base having pores; and (B) a porous coating layer which is disposed on at least one surface of the porous base and formed to include a mixture of inorganic particles and a binder polymer, wherein the binder polymer comprises a copolymer containing: (a) a first monomer unit including at least one of an amine group or an amide group in a side chain; and (b) a second monomer unit made of (meta) acrylate having an alkyl group of carbon number 1 to 14. Since the porous coating layer included in the separator of the present invention shows high packing density, thinning of a battery can be easily implemented without hindering stability. Additionally, the porous coating layer has a high adhesive strength to the porous base, thereby solving the problem that inorganic particles in the porous coating layer are separated in an assembly process for an electrochemical device.

Inventors:

HA JEONG-MIN (KR)
KIM KEE-YOUNG (KR)
CHO BYEONG-GYU (KR)
JIN SUN-MI (KR)
KIM NO-MA (KR)
KIM JONG-HUN (KR)
SHIN BYOUNG-JIN (KR)

Application Number:

PCT/KR2011/001393

Publication Date:

September 22, 2011

Filing Date:

February 28, 2011

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)
HA JEONG-MIN (KR)
KIM KEE-YOUNG (KR)
CHO BYEONG-GYU (KR)
JIN SUN-MI (KR)
KIM NO-MA (KR)
KIM JONG-HUN (KR)
SHIN BYOUNG-JIN (KR)

International Classes:

H01M50/414; H01M50/454; H01M50/457; H01M50/489; H01M50/491

Foreign References:

KR20070000231A

2007-01-02

Other References: