ELECTROCHEMICAL DEVICE

摘要

Provided is an electrochemical device which is capable of reliably overcoming disadvantages such as deterioration of dielectric strength and shortening of the life of the capacitor element as a whole. The capacitor element (10) is constituted of a laminate formed by superposition of a first electrode sheet (11), a separation sheet (14), a second electrode sheet (12), a separation sheet (14), and a third electrode sheet (13) in the named order from the bottom, and folding the laminate along a prescribed line VSL to double the laminate. In the resulting folded laminate, a current-collecting electrode layer (11a) and polarizable electrode layer (11b) of the first electrode sheet (11), the current-collecting electrode layer (12a) and polarizable electrode layer (12b) of the second electrode sheet (12), the current-collecting electrode (13a) and polarizable electrode layer (13b) of the third electrode sheet (13), and the two separation sheets (14) are respectively kept continuous through the folding position.