| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a nonaqueous electrolyte secondary battery and a manufacturing method thereof, capable of having suitable cycle characteristics even if the secondary battery is charged up to high voltage. <P>SOLUTION: In the nonaqueous electrolyte secondary battery having a positive electrode containing a positive electrode active material, a negative electrode including a negative electrode active material, and a nonaqueous electrolyte, a lithium-containing transition metal oxide having a layered structure is included as the positive electrode active material, an additive reduced and decomposed in a range of +3.0 to 1.3 V in a metal lithium standard is contained in the nonaqueous electrolyte, and an electrical potential of the positive electrode is excessively discharged until the electrical potential of the positive electrode goes below the reduced electrical potential of the additive after assembling of the battery. <P>COPYRIGHT: (C)2009,JPO&INPIT |
