| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary battery having high charging/ discharging capacities and improved charged shelf life characteristics. SOLUTION: The lithium secondary battery cell includes a positive electrode 1, a negative electrode 2 using graphite as an active material, and a non-aqueous electrolyte. In the 7Li-NMR measurement of the negative electrode active material in a fully charged state, the ratio of a peak strength I2 near 266 ppm to a peak strength I1 near 266 ppm is in the range of 0<I2/I1<=0.5. |
