Negative electrode active material for non-aqueous electrolyte secondary battery and method for producing the same

A negative electrode active material for a non-aqueous electrolyte secondary battery, containing negative electrode active material particles, wherein

• the negative electrode active material particles comprise silicon compound particles each containing a silicon compound (SiOX:
• 0.5≤X≤1.6),
• the silicon compound particle contains at least one or more of amorphous silicon and microcrystalline silicon,
• the negative electrode active material particles each contain at least one or more of Li2SiO3 and Li2Si2O5 as a Li compound, and
• the negative electrode active material particle comprises a compound having a zeolite crystal structure, the compound adhering to a surface layer portion of the negative electrode active material particle.

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

• preparing silicon compound particles each containing a silicon compound (SiOX:
• 0.5≤X≤1.6);
• modifying the silicon compound particles by inserting Li into the silicon compound particles to form at least one or more of Li2SiO3 and Li2Si2O5 as a Li compound;
• and
• adhering a compound having a zeolite crystal structure on surfaces of the modified silicon compound particles, wherein the silicon compound particles with the compound having a zeolite crystal structure and adhering thereto are used to produce a negative electrode active material for a non-aqueous electrolyte secondary battery.