| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electric double-layer capacitor, in which the sealing part will not become loose, and no leakage of electrolyte solution occurs, despite repeated expansions and contractions of the filler inside the cell during long term usage. SOLUTION: A positive-polarity polarizable electrode 7 containing an electrolyte solution, a negative-polarity polarizable electrode 7 containing an electrolyte solution, and an electrolyte solution of a gel state arranged between the polarizable electrodes, are accommodated in a space sandwiched by collector electrodes 4, 6 and surrounded by packing 2. All these are sealed hermetically by pressing from both ends, to form an electric double-layer capacitor, where a gaseous layer 8 for absorbing expansion and contraction is arranged in the space by an amount of 6% or higher and 20% or lower (under an atmospheric pressure and at 25 deg.C) of the total volume of the gas layer and the liquid layer inside the space.</p> |
