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

摘要

The present invention is a negative electrode material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles composed of a silicon compound (SiO_x, where 0.5≦x≦1.6) containing a lithium compound, the negative electrode active material particles being coated with a coating containing at least two of a substance having two or more hydroxyl groups per molecule, phosphoryl fluoride, lithium carbonate, and a hydrocarbon that exhibits a positive ion spectrum C_yH₂ (1≦y≦3 and 2≦z≦5) when subjected to TOF-SIMS. There can be provided a negative electrode material for a non-aqueous electrolyte secondary battery, a non-aqueous electrolyte secondary battery including a negative electrode using this negative electrode material, and a method of producing negative electrode active material particles that can increase the battery capacity and improve the cycle performance and initial charge and discharge performance.