| 摘要 |
An electric double layer capacitor with a low resistance value is disclosed. The electric double layer capacitor includes an electrochemical device in the inside of a housing container and capable of achieving charge and discharge via external terminals, wherein the electrochemical device includes a pair of electrodes, a separator disposed between the pair of electrodes, and an electrolytic solution with which the pair of electrodes and the separator are impregnated; when a volume between the pair of electrodes is designated as Ve, and a volume of a void in an inter-electrode part of the separator disposed between the pair of electrodes is designated as Se, an inter-electrode part void ratio Re is defined as Re=Se/Ve×100 (%); and when a thickness of the inter-electrode part is designated as L2 (mum), and a separator evaluation index Ie is defined as Ie=L2/Re (mum/%), a relation of Ie@1.0 (mum/%) is satisfied.
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