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

PURPOSE: A producing method of a negative electrode active material for a nonaqueous electrolyte secondary cell, the negative electrode active material, a negative electrode member, a negative electrode, and the nonaqueous electrolyte secondary cell are provided to secure the high initial efficiency and battery capacity of silicon. CONSTITUTION: A producing method of a negative electrode active material for a nonaqueous electrolyte secondary cell comprises the following steps: precipitating silicon on a substrate with the temperature controlled at 300-800 deg C in a decompressed condition, by an evaporation process using a silicon material; crushing and distributing the precipitated silicon; and heating the silicon at 600-1,100 deg C. The crushing and distributing process is performed by a laser diffraction scattering-particle distribution measuring method.