SILICON-GRAPHITE COMPOSITE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME, AND METHOD FOR PRODUCING SAID SILICON-GRAPHITE COMPOSITE ELECTRODE ACTIVE MATERIAL

摘要

According to one embodiment of the present invention, provided is a silicon-graphite composite electrode active material that can be used in a secondary battery. A silicon-graphite composite electrode active material for a secondary battery according to one embodiment of the present invention is formed using, as a unit powder, a silicon-graphite composite in which silicon is mixed with a graphite material. The silicon-graphite composite includes the graphite material and silicon located inside the graphite material, and may be formed such that silicon is either absent on the outside of the graphite material or located only on a portion of the outer surface.