| 摘要 |
PURPOSE:To increase adhesive strength between a current collecting body and an electrode active material, and improve a charging and discharging cycle characteristic by fixing the electrode active material composed of a carbonaceous material on the current collecting body whose current collecting body surface is formed in a rough surface. CONSTITUTION:Polyvinylidene fluoride is mixed as a binder into a material formed by pulverizing coal pitch coke by a ball mill, and N-methylpyrrolidone is added, and is formed in a slurry shape. This slurry is applied on a copper foil whose surface is formed in a rough surface beforehand by rubbing it by an emery paper, after it is dried, an electrode is formed by press. A lithium metal foil is used in a positive electrode to this negative electrode, and electrolyte formed by dissolving perchloric acid lithium into propylene carbonate is used, and a battery is formed. In this way, since the current collecting body surface is formed in the rough surface, adhesive strength of an electrode active material and a current collecting body can be increased, and a charging and discharging cycle characteristic of the battery can be improved. |
