| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery capable of suppressing an internal pressure of a battery to a low level in the case where the battery is left at high temperature without deteriorating battery characteristics such as a battery capacity and high rate charge/discharge characteristics. SOLUTION: In a nonaqueous electrolyte secondary battery provided with a positive electrode including mainly a lithium containing transition metal oxide, an oxide selected from among SrO, CaO, BaO and MgO is disposed in the form of a solid such as powder or a molding inside a battery system in such a manner as not to be directly brought into contact with the electrode and an electrolyte, and a carbon dioxide produced inside the battery is reacted with the above oxide to produce carbonate, thus preventing any increase in the internal pressure of the battery. |
