- - Manufacturing Method of Carbon-Silicon Composite Powder Carbon-Silicon Composite Powder Manufactured Thereby and Lithium Secondary Battery Comprising the Same

摘要

The present invention is A) A formulation in which the weight ratio of silicon particles, crystalline carbon and amorphous carbon precursor is 20-70: 20-70: 1-19 by adding a precursor of crystalline carbon and amorphous carbon to a silicon slurry containing silicon particles and a dispersion medium 1 preparing a mixed solution; b) preparing a first composite powder by spray-drying the first mixed solution; c) preparing a second mixed solution by adding the first composite powder to an aqueous solvent containing carbon fibers; D) performing a cold isostatic pressing (CIP) process on the second mixed solution and then drying to prepare a second composite powder; and E) preparing a carbon-silicon composite powder by classifying the second composite powder without a grinding process; a carbon-silicon composite powder manufacturing method comprising; a carbon-silicon composite powder prepared thereby, and a lithium secondary battery including the same provides