| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric double layer capacitor which can increase charge voltage. SOLUTION: The electric double layer capacitor is constructed by setting a polarizing negative electrode and a polarizing positive electrode across a separator held between both electrodes. The area of the polarizing positive electrode is larger than that of the polarizing negative electrode, and the side end of the polarizing positive electrode has a portion overhanging outside the side end of the polarizing negative electrode. Thus, the side end of the polarizing negative electrode is so set as not to overhang outside the side end of the polarizing positive electrode. This reduces the density of currents that flows along the periphery of the polarizing positive electrode when the capacitor is charged. Consequently, an effect of less deterioration is brought despite of repeated charging with a large voltage. COPYRIGHT: (C)2007,JPO&INPIT
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