| 摘要 |
PURPOSE:To improve discharging characteristics, charging and discharging efficiency, charging and discharging capacity, and a cyclic lifetime by providing a negative electrode via the formation of a lithium metal layer at the rear side of the deposited separator of a negative electrode active material. CONSTITUTION:A negative electrode active material 6 of an aluminum or an aluminum alloy is formed on the sheet shaped active material 3 of a positive electrode 1 via a separator 4, and a lithium metal layer 7 is adhered to the rear side of the separator 4 adhered to the negative electrode active material 6, thereby forming a negative electrode 5. According to the aforesaid construction, the potential of the negative electrode 5 can be lowered, compared with the potential of a positive electrode and battery voltage can be raised. Moreover, the capacity of the negative electrode 5 can be enlarged, compared with the capacity of the positive electrode. Consequently, a lithium ion can be discharged not only from the negative electrode active material of an aluminum-lithium alloy, but also from a lithium metal layer at the time of discharging. And charging and discharging efficiency can be neared to 100% and high potential can be maintained until the finish of discharging. |
