NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING NEGATIVE ELECTRODE MATERIAL FOR NON-AQUEOUS SECONDARY BATTERY, AND METHOD FOR PRODUCING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A negative electrode active material for non-aqueous electrolyte secondary batteries which has particles of negative electrode active material, the particles of negative electrode active material containing a silicon compound (SiO_x: 0.5≤x≤1.6) that contains a Li compound, including a carbon coating on at least a part of a surface of the silicon compound and a salt coating containing one or more kinds of a metal silicate containing a metal element other than a lithium element and a metal salt containing a metal element other than the lithium element on a part of a surface of the silicon compound or a surface of the carbon coating or both of these. Thus, the negative electrode active material for non-aqueous electrolyte secondary batteries having high stability to an aqueous slurry, high capacity and excellent cycle characteristics and initial efficiency may be provided.