| CPC C01B 33/02 (2013.01) [C01B 32/05 (2017.08); C01B 32/21 (2017.08); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01)] | 10 Claims |
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1. A method of preparing a silicon composite, the method comprising:
forming a silicon solution by wet-grinding a silicon raw material;
forming silicon fine powder by spray-drying the silicon solution;
disintegrating the silicon fine powder;
forming a dispersion by coating the silicon fine powder with a first pitch;
forming a first composite by coating the dispersion with a second pitch;
forming a second composite by carbonizing the first composite; and
classifying the second composite according to a preset particle size reference, and
wherein the forming of the dispersion comprises:
forming a core by dispersing the silicon fine powder in graphite; and
dry-coating the core with the first pitch,
wherein, in the dry-coating of the core with the first pitch, the core is dry-coated with the first pitch at a temperature of 120° C. or more and 150° C., and a content of the first pitch in the dispersion is 15% or more and 16% or less in weight percent.
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