Si-BLOCK COPOLYMER CORE-SHELL NANOPARTICLE TO BUFFER VOLUMETRIC CHANGE AND ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an Si-block copolymer core-shell nanoparticle which is for forming a film to buffer volumetric change due to Si during charge and discharge of a lithium secondary battery in a dispersing and coating step, and which includes: an Si core; and a block copolymer shell including a block having high affinity for Si and a block having low affinity for Si and forming a spherical micelle structure around the Si core, and to provide an anode active material for the lithium secondary battery using the same.SOLUTION: An Si-block copolymer core-shell nanoparticle is constructed, which includes: an Si core; and a block copolymer shell including a block having high affinity for Si and a block having low affinity for Si and forming a spherical micelle structure around the Si core.