| abstract |
[PROBLEMS] To provide a secondary battery having excellent charge / discharge efficiency, high electric capacity density, and low self-discharge rate. A secondary battery comprising a positive electrode, a negative electrode containing a fibrous carbon material, and a non-aqueous electrolyte, wherein the fibrous carbon material is preliminarily occluded with alkali metal ions by chemical means. Achieve the task. The fibrous carbon material used for the negative electrode has a diameter of 0.1 μm to 1. The thing of 0 μm is good. |