| 摘要 |
A negative-electrode plate 22 for use in a cylindrical cell, intended to be laid over a positive-electrode plate 21 with a separator 23 interposed between and rolled to form a cylindrical electrode body 20, with the positive-electrode plate 21 inside, the electrode body being arranged in a bottomed cylindrical outer can 10 to form the cylindrical cell, comprises a first negative-electrode part 22a which is to face the positive-electrode plate 21 on either side, with the separator 23 between, when formed into the electrode body 20, and a second negative-electrode part 22b which is to form the innermost circumference of the electrode body 20 and face the positive-electrode plate 21 only on one side, with the separator 23 between, when formed into the electrode body 20, the second negative-electrode part 22b being lower in negative-electrode active material density than the first negative-electrode part 22a. |
