| 摘要 |
A negative electrode material capable of providing a high capacity while enhancing cyclic characteristics, a process for producing the same, and a cell. The negative electrode material has a reaction phase including an element capable of producing an intermetallic compound with Li, and C. Preferably, the reaction phase has the half width of diffraction peak by X-ray diffraction of not smaller than 0.5°. Furthermore, the negative electrode material can preferably provide a peak of C in a region lower than 284.5 eV by XPS and the energy difference of peak between the 3d5/2 orbit of Sn and the 1s orbit of C is preferably larger than 200.1 eV when the negative electrode material contains Sn as the element capable of producing an intermetallic compound with Li. The element capable of producing an intermetallic compound with Li can thereby be inhibited from aggregating or crystallizing as charge/discharge occurs. |
