CROSS-LINKED SEPARATOR FOR LITHIUM SECONDARY BATTERY, COMPRISING CROSS-LINKED POLYOLEFIN, AND MANUFACTURING METHOD THEREFOR

Disclosed are a crosslinked separator for a lithium secondary battery which comprises a crosslinked polyolefin porous substrate including a plurality of fibrils and pores formed by the fibrils entangled with one another, wherein polyolefin chains forming the fibrils are crosslinked directly with one...

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Bibliographic Details
Main Authors HAN, Sung-Jae, AN, Hyo-Sun, LEE, Joo-Sung, KIM, Bong-Tae, MUN, Sung Cik, BAE, Won-Sik
Format Patent
LanguageEnglish
French
German
Published 05.04.2023
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:Disclosed are a crosslinked separator for a lithium secondary battery which comprises a crosslinked polyolefin porous substrate including a plurality of fibrils and pores formed by the fibrils entangled with one another, wherein polyolefin chains forming the fibrils are crosslinked directly with one another; and shows a change in tensile strength of 20% or less in the machine direction, as compared to a non-crosslinked separator including a polyolefin porous substrate before crosslinking, and a method for manufacturing the same. The crosslinked separator for a lithium secondary battery has excellent thermal safety, while not adversely affecting the other physical properties.
Bibliography:Application Number: EP20200885010