| abstract |
A non-aqueous electrolyte secondary battery having excellent safety and charge / discharge cycle performance is provided by forming a stable lithium ion conductive film on the surface of metallic lithium or a lithium alloy. In a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode containing lithium or a lithium alloy, and a non-aqueous electrolyte, silicon oxide, silicon sulfide, lithium oxide, and lithium sulfide are formed on the surface of the negative electrode active material. The film 6 containing is formed. [Selection] Figure 1 |