| abstract |
The present invention is a method for manufacturing a negative electrode active material for a non-aqueous electrolyte secondary battery. The negative electrode active material for a non-aqueous electrolyte secondary battery contains a silicon compound SiO x , wherein 0.5≦x≦1.6, the silicon compound contains lithium, and the non-aqueous material The method for manufacturing a negative electrode active material for an electrolyte secondary battery is characterized by the step of contacting a silicon compound into which lithium has been inserted into a solution B, the solution B containing a polycyclic aromatic compound or a derivative thereof, or Including both of them, wherein Solution B contains, as a solvent, one or more kinds selected from ether solvents, ketone solvents, ester solvents, alcohol solvents, and amine solvents; and the step of contacting the silicon compound with the solution C, Among them, the solution C contains, as a solvent, one or more kinds selected from alcohol-based solvents, carboxylic acid-based solvents, and water. Accordingly, the present invention provides a method for manufacturing a negative electrode active material for a non-aqueous electrolyte secondary battery, which can increase the battery capacity and can improve cycle characteristics. |