| abstract |
(A) a Si microparticle phase; And (b) at least two phases selected from the group consisting of SiM compound phase, SiN compound phase, SiMN compound phase, and MN compound phase, wherein M is at least one element selected from the group consisting of Ti, V, Cr And at least one element selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zr, Nb and Mg, and N is at least one element selected from the group consisting of S, Se, Te, Sn, In, Ga, Pb, And Ag, wherein the metal element is at least one element selected from the group consisting of a metal element; Wherein the ratio of the XRD peak area on the phase (a) to the peak area on the phase (b) is 1: 2 to 1: 1, and a lithium secondary battery comprising the negative active material for the lithium secondary battery. |