| 摘要 |
PURPOSE:To provide a lightweight power supply for an electric automobile by equipping the vehicle with a nonaqueous secondary battery using a carbona ceous material suitable for doping and de-doping lithium ions as a negative electrode active material. CONSTITUTION:A carbonaceous material as a negative electrode active material for a nonaqueous material as a negative electrode doping and de-doping lithium ions. For example, graphite, pyrocarbon, pitch coke, a baked body of organic polymer or the like is used as the carbonaceous material. A polyolefine single fine porous film such as polyethylene and polypropylene, or a film comprising one or more types of the materials as pasted is used as a separator. If necessary, positive and negative active material particles are applied to a metal foil collector, together with a binder and this collector is spirally wound about a cylindrical or elliptical body via the separator. This coil body is inserted in a battery can and fitted with a lead tap. Then, the body is impregnated with electrolytic solution and sealed. |
