| 摘要 |
PURPOSE:To provide a nonaqueous electrolyte secondary battery, which is embodied light and small, equipped with a high energy density, and presenting excellent resistance against over-discharging. CONSTITUTION:A metal lithium foil is in advance affixed to the carbon material of a negative electrode 2, and the lithium is allowed to permeate the carbon material through the action of the potential difference or concentration difference, and thereby the lithium for enabling charging is retained by the negative electrode carbon material. Therein the capacity of metal Li foil affixation ranges 4-40% of the saturated reversible capacity of the negative electrode carbon material. The metal lithium foil affixed to the carbon material forms a local cell together with the carbon material under existence of nonaqueous electrolytic solution, and the lithium is intercalated in the carbon material electrochemically to be retained as dischargeable lithium. |
