Negative electrode active material for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method of producing negative electrode material for a non-aqueous electrolyte secondary battery

A method of producing a negative electrode material for a non-aqueous electrolyte secondary battery, the negative electrode material containing negative electrode active material particles, the method comprising:

• producing particles of a silicon compound expressed by SiO where 0.5≦x≦1.6;
• at least partially coating a surface of the particles of the silicon compound with a carbon coating;
• selecting, from the particles, silicon compound particles coated with a carbon coating
• exhibiting a peak at 2θ=25.5° having a half width of 1.5° to 4.5° in an X-ray diffraction spectrum measured after separating the carbon coating from the silicon compound particles, and
• exhibiting scattering peaks at 1330 cm−1 and 1580 cm−1 in Raman spectrum obtained by Raman spectrometry measured after separating the carbon coating from the silicon compound particles, wherein a ratio of an intensity of the scattering peak at 1330 cm−1 to that at 1580 cm−1 satisfies 0.7<I1330/I1580<2.0;
• and
• using the selected silicon compound particles coated with the carbon coating for the negative electrode active material particles to produce the negative electrode material.