Electricity storage element for electrochemical device and manufacturing method thereof, electrochemical device using the same and manufacturing method thereof

Abstract

[Object] One object is to provide an electric storage element for electrochemical devices that can prevent fall of active material powder from an outer edge of an active material layer, thereby preventing functional disorders due to the fall of the active material powder. [Solution] In accordance with one aspect, an electric storage element SD11 has laminated structure wherein active material layers (first active material layer 13 and second active material layer 16) are placed between an ion permeable layer 12 and a first collector layer 15 and between the ion permeable layer 12 and a second collector layer 15. The active material layers have a smaller outline than the ion permeable layer 12 and are tightly enclosed with insulating layers (first insulating layer 14 and second insulating layer 17) filling the respective ambient regions corresponding to the difference in outlines from the ion permeable layer 12.

Description

technical field [0001] The present invention relates to production of electric storage elements suitable for electrochemical devices such as electric double layer capacitors, lithium ion capacitors, redox capacitors, and lithium ion batteries, electrochemical devices using the same, and electric storage elements for electrochemical devices Methods, and methods of manufacturing electrochemical devices. Background technique [0002] Electric storage elements used in electrochemical devices such as electric double layer capacitors, lithium ion capacitors, redox capacitors, and lithium ion batteries have active material layers interposed between the ion permeable layer and the first collector layer, and The laminated structure between the ion permeable layer and the second collector layer. In addition, the corresponding electrochemical device has a structure in which an electricity storage element is enclosed in a package. [0003] The active material layer in such an electric...

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Problems solved by technology

However, if the ratio of the binder, which is a non-conductive material, is increased, the resistance value of the active material layer will increase and the performance will decrease.

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