| 摘要 |
A nonaqueous electrolyte secondary battery is obtained which shows good cycle characteristics even when charged to a high voltage. The nonaqueous electrolyte secondary battery has a positive electrode containing a positive active material, a negative electrode containing a negative active material and a nonaqueous electrolyte, wherein a lithium-containing transition metal oxide having a layered structure is contained in the positive electrode as the positive active material, an additive which is reductively decomposed in the range of +3.0-1.3 V versus metallic lithium is contained in the nonaqueous electrolyte, and the battery after assembled is overdischarged until a potential of the positive electrode falls down to a reductive potential of the additive or below.
|
