Electrode, electric double-layer capacitor using said electrode, and method for manufacturing said electrode

• Main Authors: TSUMEDA SATORU, ISHIMOTO SHUICHI, HORII DAISUKE
• Format: Patent
• Language: English
• Published: 13.01.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

This invention provides the following: an electrode comprising a mix of a carbon powder and fibrous carbon wherein the impact of a resin binder or the like is eliminated, the electrical resistance of said electrode is reduced, and said electrode exhibits superb capacity characteristics; an electric double-layer capacitor using said electrode; and a method for manufacturing said electrode. Said method has the one of following steps: a dispersion step in which fibrous carbon and a carbon powder having a grain diameter of less than 100 nm are dispersed in a solvent; or a dispersion step in which fibrous carbon and a carbon powder that has a grain diameter of at least 100 nm but less than 10 [Mu]m and has been treated so as to be made porous are dispersed in a solvent via either a process in which jets of a solution are made to collide with each other or a process in which shear stress and centrifugal force are applied to said solution. Said method also has an electrode formation step, after the dispersion step, in which a collector is coated with the solution resulting from the dispersion step, yielding a layer comprising a carbon-powder/fibrous-carbon mix.