Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Takahiro Takeshita

Minoru Noguchi

Eisuke Komazawa

Naohiko Oki

Manabu Iwaida

Kenichi Murakami

Ken Takahashi

Narutoshi Sugita

Shuhei Goto

Hiroyuki Tanaka

Hiroto Kobayashi

Takeshi Fujino

Yasuhiro Matsumoto

Kazuo Nunokawa

Yoshifumi Egawa

Nozomu Sugo

Byoungju Lee

Kazuma Inoue

The present invention provides a polarized electrodecontaining mixed activated carbon composed of at least two activated carbons with different specific surface areas, and the specific surface area of the mixed activated carbon is not less than 900 m/g and less than 1900 m/g. By setting the specific surface area of the mixed activated carbon to less than 1900 m/g, the resistance reduction ratio of the polarized electroderapidly increases.

Polarized electrode and electric double-layer capacitor

A coolant flow field is formed on a surface of a second metal separator. Further, a rubber bridge dividing the coolant flow field and a coolant supply passage is formed on the surface. The rubber bridge includes a plurality of channels connecting the coolant flow field and the coolant supply passage, a plurality of grooves between the channels, and a partition closing the grooves to prevent the flow of a coolant in the respective grooves.

Fuel cell

In an electric double-layer capacitor, a solution of a quaternary ammonium borofluoride compound in propylene carbonate is used as an electrolyte. The electrode includes alkali-activated carbon made using meso-phase pitch as a starting material, and a conductive filler having a rest potential smaller than that of the alkali-activated carbon in the electrolyte. The amount Fc of conductive filler incorporated in the electrode is set in a range of 10% by weight&#x2266;Fc&#x2266;40% by weight. Such electric double-layer capacitor has a large electrostatic capacity and excellent durability.

Electrode for electric double-layer capacitor, and slurry for forming the same

In an electric double-layer capacitor, a solution of a quaternary ammonium borofluoride compound in propylene carbonate is used as an electrolyte. The electrode includes alkali-activated carbon made using meso-phase pitch as a starting material, and a conductive filler having a rest potential smaller than that of the alkali-activated carbon in the electrolyte. The amount Fc of conductive filler incorporated in the electrode is set in a range of 10% by weight&lE;Fc&lE;40% by weight. Such electric double-layer capacitor has a large electrostatic capacity and excellent durability.

A cylindrical electric double-layer capacitor includes a cylindrical sealed vessel housing an electrode roll and an electrolyte solution. The electrode roll is formed of a rolled superposed assembly having band-shaped positive and negative poles and two band-shaped separators sandwiching one of the band-shaped positive and negative poles. Each of the band-shaped positive and negative poles includes a band-shaped collector and a pair of polarizing electrodes formed in a laminated manner on opposite surfaces of the band-shaped collector. In a state in which the electrode roll has been accommodated in the sealed vessel along with the electrolyte solution, an outer diameter D of the electrode roll and an inner diameter D of the sealed vessel are brought into a relationship of D &equals;D by at least one of swelling of the polarizing electrodes caused by the electrolyte solution and expansion of the polarizing electrodes caused by an electrical charge. Thus, in the cylindrical electric double-layer capacitor, it is possible to avoid an increase in internal resistance, a reduction in a self-discharging characteristic and other like electrical characteristics.

Cylindrical electric double-layer capacitor

Growing community of inventors

Wako, Japan

Takahiro Takeshita