| 摘要 |
PROBLEM TO BE SOLVED: To facilitate bending and to reduce damage to electrodes caused by falling or peeling, etc., of active materials when they are active. SOLUTION: The lithium secondary battery 1 comprises a battery element 3 enclosed in a film-like exterior material 2. The battery element 3 is made of layered negative electrode 11 and positive electrode 12, each of which consists of a collector 14, an active material layer 15, and an electrolyte layer 17 formed on the active layer 15 as the upper layer. At least one uncoated part 16 where the active material layer 15 is not applied is formed on the negative electrode 11 and the positive electrode 12 respectively, and the negative electrode 11 and positive electrode 12 are layered so that the parts 16 on the negative electrode and positive electrode face to each other. The bending process is applied to the parts 16. |
