SiOx LITHIUM-PRE DOPED SiOx PARTICLE FOR ANODE MATERIAL OF LITHIUM SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

摘要

Disclosed is a method of preparing SiO _x particles for a negative electrode material of lithium pre-doped lithium secondary battery, which increases initial reversible efficiency by pre-doping lithium to form an irreversible phase such as lithium oxide and lithium silicon oxide. The manufacturing method of SiO _x particles for lithium pre-doped lithium secondary battery negative electrode material according to the present invention comprises the steps of: (a) inducing silicon (Si) to induce melting to form silicon in a molten metal state; And (b) supplying a lithium source and an oxidation source for silicon in the molten state, SiO _x step of pre-doping of lithium in the particles; including, said SiO _x lithium oxide or / in the step of pre-doping of lithium in the particles And an irreversible phase comprising lithium silicon oxide.