COATING COMPOSITION FOR SEPARATOR, METHOD FOR PREPARING SEPARATOR USING THE SAME, AND SEPARATOR AND LITHIUM BATTERY EMPLOYING THE SEPARATOR
申请人:Samsung SDI Co., Ltd.
公开号:US20210288383A1
公开(公告)日:2021-09-16
A coating composition is used to prepare a separator for a rechargeable lithium battery. The coating composition includes inorganic particles, a binder, a silane-based dispersant, and a polymeric additive, the silane-based dispersant includes a silane-based compound having fewer than 8 carbons in an alkyl main chain, and the polymeric additive includes a fatty acid compound and a polymer polyol. The coating composition may have secured or improved long-term storage stability, and may thus provide for a composite separator having a reduced number of black spot defects after coating the separator.