| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative electrode active material suppressed for collapse and having a high capacity and a long life by forming the negative active material bearing the charging/discharging of a negative electrode material with grains containing the phase storing lithium and the phase storing no lithium. SOLUTION: In a negative electrode material, the phase-storing lithium is made of one of 3B, 4B, 5B group elements, and it is preferably made of one of Al, Ga, In, Si, Ge, Sn, Pb, Sb, Bi. The phase-storing lithium is the phase of an inter-metallic compound made of at least one kind of element among Al, Ga, In, Si, Ge, Sn, Pb, Sb, Bi. The phase which stores no lithium is preferably a phase made of one of 4A, 5A, 6A group elements and at least one kind of element from among Mn, Fe, Co, Ni, Cu. |
