| 摘要 |
PURPOSE:To improve battery performance by using a carbonaceous material as a negative electrode active material, and causing the material to preliminarily store a sufficient amount of lithium, regarding a lithium secondary battery causing charge and discharge processes to take place through reversible reaction where lithium released from either of positive and negative electrodes is stored in the other. CONSTITUTION:A carbonaceous material with lithium stored is water washed and dried, thereby manufacturing a negative electrode. In this case, though a reason is not known clearly, an amount of lithium in initially stored state and now allowed for reuse, or irreversible capacity becomes extremely large, when this method of manufacture is not applied. The irreversible capacity, however, can be substantially reduced, when the method is applied. |
