| 摘要 |
<p>An electric double layer capacitor has a pair of current collectors, a positive polarizable electrode which is provided on one of the pair of current collectors, includes activated carbon of a weight W + and has a capacitance C + , a negative polarizable electrode which is provided on the other of the pair of current collectors, includes activated carbon of a weight W - and has a capacitance C_, a separator interposed between the positive and negative polarizable electrodes, and an organic electrolytic solution which impregnates at least the positive and negative polarizable electrodes and the separator, wherein C - /C + = 0.6 to 1.0 and W - /W + = 1.1 to 2.0. Even when continuously charged at a high applied voltage, the electric double layer capacitor has a high retention of capacitance and a low rise in internal resistance, and thus has an excellent durability.</p> |
