| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery with excellent safety and cycle characteristic, which can be mass-produced at a low cost without precipitating dendritic rithium at the upper and lower parts of electrodes. SOLUTION: This battery has a positive electrode 1 and negative electrodes 2 laminated via separators 3 formed of a microporous films. The upper and lower ends of the separators 3 are overhung from the positive and negative electrodes 1, 2 to the upper and lower sides and all or part of microholes at or near a boundary 3c between an overhung area 3a and a contact area 3b contacting the positive and negative electrodes 1, 2 are closed. |
