Negatives Elektrodenmaterial für nichtwässrige Lithium-Sekundärbatterie, Verfahren zu dessen Herstellung und nichtwässrige Lithium-Sekundärbatterie enthaltend dieses Material

摘要

The present invention relates to a negative electrode material for a non-aqueous lithium secondary battery comprising a metal material M consisting of solid phases A and B, a graphite material, and a carbonaceous material having a crystallinity lower than that of said graphite material, wherein said metal material M has a structure in which a part or all of the surface of a core particle consisting of said solid phase A is covered with said solid phase B; said solid phase A contains at least silicon as a constitutive element; and said solid phase B is a solid solution or an intermetallic compound of silicon and a specific element.