| 摘要 |
PURPOSE: To provide a lithium secondary battery with excellent charge/discharge cycle characteristics. CONSTITUTION: A negative electrode is formed by pressing slurry or paste containing an active material capable of electrochemically absorbing or releasing lithium ions, a binder, and a required conductor against a coil-shaped, film- shaped, or plate-shaped current collector to form an active material layer, and a lithium secondary battery uses the negative electrode in which hardness of the active material is lower than hardness of the current collector. The active material layer contains additive powder having higher hardness than the current collector. Adhesion between the active material layer and the current collector in the negative electrode is increased, and the active material in the negative electrode hardly separates from the current collector in charge/ discharge cycles. |
