| 摘要 |
PURPOSE:To reduce a reduction in a utilization factor of a negative electrode by limiting the difference in height between a negative electrode and a positive electrode to no more than 10% of the height of the negative electrode. CONSTITUTION:The difference in height between a negative electrode 1 comprising a cylindrical alkaline metal and a positive electrode 3 comprising a columnar carbon porous mold is limited to no more than 10% of the height of the negative electrode 1. When the difference in height between the negative electrode 1 and the positive electrode 3 is increased, when discharging is generated at heavy load, ionization of the alkaline metal does not catch up with battery reaction, in particular, at the final stage of the discharging, and thus a utilization factor of the negative electrode is reduced. Since the difference in height between the positive electrode 3 and the negative electrode 1 is limited to no more than 10% of the height of the negative electrode 1 in this case, reduction in the utilization factor of the negative electrode is suppressed. |
