| abstract |
The present invention relates to: a method for preparing a secondary battery anode material having excellent electrochemical performance, by using a silicon oxide having low oxygen content; a secondary battery anode material prepared thereby; and a secondary battery, and, to a method for preparing a secondary battery anode material, a secondary battery anode material prepared thereby, and a secondary battery, the method comprising: a gel generation step of injecting SiCl4 into a reactor at a temperature of 0-25°C in an inert atmosphere, and then injecting ethylene glycol, thereby forming a gel; a pre-heating step of heating the gel, having been obtained in the gel generation step, at a temperature of 200-500°C; and a heat treatment step of forming silicon oxide by heating the gel, having undergone the pre-heating step, at a temperature of 500-1,100°C. |