▎ 摘　　要

NOVELTY - Composition includes ceramic particles, hexagonal boron nitride, crosslinkable polymer, and binder polymer. The surface of the ceramic particles and hexagonal boron nitride is modified by adding 1-10 pts. wt. of a silane coupling agent to 100 pts. wt. of the ceramic particles and hexagonal boron nitride. USE - Composition for coating a secondary battery separator (Claimed). ADVANTAGE - The composition is having high heat resistance on a secondary battery separator, enables uniform interfacial adhesion between the separator and the electrode, and prevents the growth of lithium dendrites at the negative electrode due to the unstable interface between the separator and the electrode, and prevents the occurrence of an internal short circuit caused by lithium dentrite. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a secondary battery separator, which includes a coating layer comprising the composition for coating a secondary battery separator is formed on one or both sides of a secondary battery separator substrate.