| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary cell using a negative electrode body which has a high capacity, a long cycle life and a low irreversible capacity on primary charging, i.e., is soft to an electrolyte. SOLUTION: The negative electrode material for a non-aqueous lithium secondary cell contains a metallic material M consisting of solid-phases A, B, a graphitic material and a carbonaceous material having a crystalline lower than that of the graphitic material, where the metallic M is a structure coating a portion or front of a circumference of core particle consisting of the solid- phase A with the solid-phase B, the solid-phase A contains at least silicon as a constituent, the solid-phase B is at least one element selected from a group consisting of elements of group 2, transition metal elements, elements of group 12, elements of group 13 and elements of group 14 except for carbon and silicon, solid solution with silicon, or inter-metallic compounds. |
