METHOD FOR PRODUCING SILICON-CONTAINING PARTICLES FOR ANODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY ANODE MEMBER FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND SILICON-CONTAINING PARTICLES FOR ANODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

In the present invention, silicon-containing particles for a negative electrode active material for a non-aqueous electrolyte secondary battery were prepared by heating the silicon-containing particles obtained by a vapor deposition method under a reducing atmosphere, for example, in a temperature range of 400-1100 ° C. In addition, the silicon-containing particles for a negative electrode active material for a nonaqueous electrolyte secondary battery produced by this production method were made to have a negative electrode active oxygen content for a nonaqueous electrolyte secondary battery of 0.1 to 1.5% by mass. Thereby, when used as a negative electrode active material for a nonaqueous electrolyte secondary battery, it is possible to obtain a nonaqueous electrolyte secondary battery having little volume change during charging and discharging and having excellent initial cycle efficiency and excellent cycle characteristics.