| 摘要 |
PURPOSE:To provide a nonaqueous electrolyte secondary battery excellent in cycle characteristic and holding characteristic by adding a specific quantity of metal oxide capable of storing or discharging lithium into a carbon material capable of storing or discharging lithium when the carbon material is used as a negative electrode. CONSTITUTION:In a nonaqueous electrolyte secondary battery where a carbon material capable of storing or discharging a lithium ion is used as a negative electrode, 1-10wt% of metal oxide capable of storing or discharging lithium is added into the carbon material with respect to the total weight of the metal oxide and the carbon material. FeO, FeO2, Fe2O3, SnO, SnO2, MoO2, V2O5, Bi2Sn3O9, WO2, WO3, Nb2O5 or MoO3 is used as the metal oxide. Consequently, it is possible to prevent the increase in potential of the negative electrode in an electric discharging final period, thus providing the nonaqueous electrolyte secondary battery excellent in cycle characteristic and holding characteristic in an electrically discharged state. |
