Patent ID: 11942640
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC H

Claim 9:
10. A method for preparing the silicon-silicon oxide-magnesium silicate composite according to claim 1, comprising:
introducing a mixture comprising silicon powder, silicon dioxide (SiO2) powder and Mg powder at a molar ratio of the silicon powder to the silicon dioxide (SiO2) powder of 1:0.5-1:1.5 and a molar ratio of the silicon powder to the Mg powder of 1:0.01-1:1 to a reactor;
heating the mixture comprising the silicon powder, the silicon dioxide (SiO2) powder and the Mg powder to 1,000-1,800° C. under vacuum so that silicon oxide vapor resulting from a mixed powder of the silicon powder and the silicon dioxide (SiO2) powder and magnesium vapor may be generated at the same time to carry out a vapor-phase reaction, and then cooling the reaction mixture to precipitate a silicon-silicon oxide-magnesium silicate composite at 650-900° C.; and
pulverizing the precipitated silicon-silicon oxide-magnesium silicate composite to an average particle diameter of 0.1-20 μm.