| abstract |
(57) [Problem] To provide a non-aqueous electrolyte lithium secondary battery having high safety and excellent battery performance. SOLUTION: In a non-aqueous electrolyte lithium secondary battery, The non-aqueous electrolyte contains a room-temperature molten salt as a main component, and the negative electrode contains a negative electrode active material whose operating potential is more noble than 1 V with respect to the potential of metallic lithium. Are characterized in that the positive electrode contains a positive electrode active material whose operating potential is more noble than 4.5 V with respect to the potential of metallic lithium. |