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

Abstract

A negative electrode active material for a non-aqueous electrolyte secondary battery containing negative electrode active material particles which include silicon compound particles containing a silicon compound (SiOx: 0.5≤x≤1.6), wherein the silicon compound particles are a negative electrode active material for a non-aqueous electrolyte secondary battery containing a Li compound, the material particles are at least partially coated with a carbon coating, an amount of the carbon coating relative to a total amount of the silicon compound particles and carbon coating is larger than 0 mass % and 1 mass % or less, the carbon coating contains a coating composed of at least any one of a compound having O—C═O bond and a compound having C—C bond, and the silicon compound particles contain crystalline Li2SiO3 as the Li compound. Thereby, the negative electrode active material for a non-aqueous electrolyte secondary battery having a large capacity, excellent cycle characteristics, and first-time efficiency is provided.

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