申请人:SAMSUNG SDI CO., LTD.
公开号:US20150155542A1
公开(公告)日:2015-06-04
Disclosed herein is a high thermal resistant polyolefin-based separator including a coating layer containing polyamic acid.
Specifically, the separator includes a polyolefin-based substrate film, and a coating layer containing polyamic acid formed on one or both surfaces of the polyolefin-based substrate film, wherein the polyamic acid contains one or more functional groups selected from the group consisting of a sulfone group, a trifluoromethyl group, an alkyl group, and a phenyl ether group.
Also, disclosed herein is an electrochemical battery having improved thermal stability by using the separator including a coating layer containing polyamic acid.