| 摘要 |
PURPOSE:To improve discharge capacity, charge/discharge cycle performance and safety by using transition metal composite oxide as negative electrode active material, spinel lithium manganese composite oxide as positive electrode active material and nonaqueous solution as electrolyte. CONSTITUTION:An nonaqueous electrolyte secondary battery is formed basically with positive electrode active material, negative electrode active material and lithium salt containing nonaqueous electrolyte. In the positive electrode active material, spinel structure lithium containing manganese oxide shown as Li1+x[Mn2-y]O4 (0<=x<1.7, 0<y<0.7) is contained. The negative electrode active material is obtained by intercalating lithium ions in transition metal oxide which may contains lithium. In such a case, the intercalation of the lithium ions is performed unitl the basic crystal structure of the transition metal oxide is changed (a X-ray diffraction pattern is changed). The intercalation is kept until the basic crystal structure of the lithium ions containing transition metal oxide after intercalated is in substantially unchanged condition during charging and discharging (the X-ray diffraction pattern is substantially unchanged). |
