METHOD OF MANUFACTURING SILICON-CONTAINING PARTICLES FOR USE IN NEGATIVE ELECTRODE ACTIVE MATERIAL OF NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL FOR USE IN THE BATTERY, NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND THE SILICON-CONTAINING PARTICLE

摘要

The present invention manufactures silicon-containing particles for use in a negative electrode active material of a non-aqueous electrolyte secondary battery by obtaining the silicon-containing particles by a deposition method and performing a heat treatment on the silicon-containing particles under a reducing atmosphere at, for example, 400° C. to 1100° C. The silicon-containing particles manufactured by this method have an oxygen content ranging from 0.1 to 1.5 mass %. These silicon-containing particles enable manufacture of a non-aqueous electrolyte secondary battery that has a high initial efficiency and an excellent cycle performance and exhibits a small volume variation upon charging and discharging.