PROCESS FOR PRODUCING NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY

摘要

Disclosed is a negative electrode active material containing silicon particles as an active material effective as a negative electrode of a nonaqueous electrolyte secondary battery having excellent cyclic characteristics and reduced volume change during charging and discharging while maintaining high initial efficiency and cell capacity of silicon. Of the present invention. A method of manufacturing a negative electrode active material for a secondary battery using a non-aqueous electrolyte, comprising the steps of: depositing a silicon metal source on at least a substrate controlled at a temperature of 300 to 800 DEG C under reduced pressure to deposit silicon; And a negative electrode active material for a non-aqueous electrolyte secondary battery.