Fuji Jukogyo Kabushiki Kaisha

Taiyo Yuden Co., Ltd.

Satoshi Nagura

Kenji Kojima

Nobuo Ando

Naoto Hagiwara

Katsuei Ishida

Yukinori Hato

Chisato Marumo

Tomofumi Akiba

Tomohiro Taguchi

Toshiya Terui

Shin Nakagawa

Provided is an electrochemical device which is capable of suppressing problems affecting the capacitor element as a whole, such as a drop in its voltage resistance characteristics and shortening of its life. The capacitor element () is constituted of a laminate formed by superposition of a first electrode sheet (), a separation sheet (), a second electrode sheet (), a separation sheet (), and a third electrode sheet () in the named order from the bottom, and folding the laminate along a reference line VSL to double the laminate. In the resulting folded laminate, a collector electrode layer () and polarizable electrode layer () of the first electrode sheet (), the collector electrode layer () and polarizable electrode layer () of the second electrode sheet (), the collector electrode () and polarizable electrode layer () of the third electrode sheet (), and the two separation sheets () are connected to each other at the respective folded locations.

Electrochemical device

An organic electrolyte capacitor is provided with a high energy density, a high power and a high capacitance even at &#x2212;20&#xb0;. The organic electrolyte capacitor has a high discharge capacity even at a temperature as low as &#x2212;20&#xb0; C., while having a high voltage and a high energy density. The structure of the organic electrolyte capacitor includes a positive electrode, a negative electrode, and an electrolyte capable of transporting lithium ions. The positive electrode can reversibly support lithium ions and anions, and the negative electrode can reversibly support the lithium ions by using a mesopored carbon material having a pore volume of 0.10 ml/g or more for a pore diameter of 3 nm or larger.

Organic electrolyte capacitor using a mesopore carbon material as a negative electrode

Growing community of inventors

Ueda, Japan

Satoshi Nagura