| abstract |
A production method of a negative electrode active material for non-aqueous electrolyte secondary batteries containing a silicon compound (SiOx: 0.5≤x≤1.6) that contains Li, includes: making a silicon compound into which the lithium has been inserted contact with a solution B containing a polycyclic aromatic compound or a derivative thereof or both thereof (here, the solution B contains one or more kinds selected from an ether-based solvent, a ketone-based solvent, an ester-based solvent, an alcohol-based solvent, and an amine-based solvent as the solvent); and making the silicon compound contact with a solution C (here, the solution C contains one or more kinds selected from an alcohol-based solvent, a carboxylic acid-based solvent, and water as the solvent). Thereby, a production method of a negative electrode active material for non-aqueous electrolyte secondary batteries is capable of increasing a battery capacity and improving the cycle characteristics. |