WO2005001861A1 - 電気二重層キャパシタ用電極の製造方法 - Google Patents
電気二重層キャパシタ用電極の製造方法 Download PDFInfo
- Publication number
- WO2005001861A1 WO2005001861A1 PCT/JP2004/009578 JP2004009578W WO2005001861A1 WO 2005001861 A1 WO2005001861 A1 WO 2005001861A1 JP 2004009578 W JP2004009578 W JP 2004009578W WO 2005001861 A1 WO2005001861 A1 WO 2005001861A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- electric double
- double layer
- layer capacitor
- parts
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/38—Carbon pastes or blends; Binders or additives therein
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/42—Powders or particles, e.g. composition thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to a method for manufacturing an electrode for an electric double layer capacitor.
- An electrode for an electric double layer capacitor is formed as an electrode layer by molding an electrode forming composition containing a carbon material as an active material, a binder, and a conductivity imparting agent added as necessary. It has a structure in which a layer is laminated with a metal foil or a metal mesh as a current collector.
- Japanese Unexamined Patent Publication Nos. 63-1701 / 1999 and 2-235320 disclose carbon fine powder, a binder comprising a fluoropolymer such as polytetrafluoroethylene (PTFE), and a liquid lubricant. And a method for forming an electrode layer by pressure-forming an electrode-forming composition containing an agent.
- Japanese Patent Application Laid-Open No. 9-306798 proposes a method in which a kneaded product of activated carbon and PTFE as a binder is integrally formed with a metal collector electrode and pressure-formed to form an electrode. .
- the electrode forming composition When PTFE is used as a binder, the electrode forming composition must be pre-kneaded to make the PTFE fibrous, and the kneading aid added during pre-kneading is removed. And the process becomes complicated. In addition, during the pre-kneading of PTFE, there are portions where fibers are formed and portions which are not fiberized, so that when the electrode layer is formed into a thin film, the surface tends to be uneven, resulting in insufficient electrode strength. In some cases, the performance of the obtained electric double layer capacitor was not sufficiently good.
- a method using a binder other than PTFE a method has also been proposed in which activated carbon having a specific particle size and plastic powder having a specific particle size are formed into a plate at a temperature near the melting point of the plastic to form an electrode layer.
- activated carbon, conductive A method has also been proposed in which an electrode is prepared by pressure-forming a mixed powder obtained by powder-mixing a binder powder composed of a conductive material and a thermoplastic resin or a B-stage thermosetting resin (Japanese Patent Laid-Open No. No. 63_15101010).
- the electrode obtained by these methods lacks flexibility, the electrode layer may crack or fall off the current collector when the electrode is wound and stored in a container. Also, the performance of the obtained electric double layer capacitor was not sufficient.
- Japanese Patent Application Laid-Open No. Sho 62-166506 discloses a method of using an elastomer as a binder, in which latex and activated carbon are mixed and dehydrated, and the obtained aggregate is pulverized and granulated. There has been proposed a method for press forming. Furthermore, Japanese Patent Application Laid-Open No. 8-250380 also proposes a method of pressure-forming a mixture obtained by mixing and drying a xylene solution of styrene butadiene rubber or acrylonitrile butadiene rubber with activated carbon and drying. Have been. However, in the methods described in these documents, the steps are still complicated, and the performance of the obtained electric double layer capacitor is not sufficient. Disclosure of the invention
- an object of the present invention is to provide a method for manufacturing an electrode that provides an electric double layer capacitor having a large capacitance with a simplified process and high productivity.
- the present inventors have conducted intensive studies to solve the above problems.
- the method of mixing latex and activated carbon fills the pores of activated carbon with an emulsifier or the like in the latex.
- the capacity of the obtained electric double layer capacitor may be reduced because the binder covers the surface of the activated carbon.
- the present inventors have completed the present invention described below based on these findings.
- the step of mixing the particulate elastomer and the carbonaceous material in a powder form to obtain a powder mixture, and the step of dry-molding the obtained powder mixture are performed.
- the particulate elastomer preferably has a crosslinked structure.
- the carbonaceous material preferably contains activated carbon as an active material.
- the carbonaceous material further contains a conductivity imparting agent.
- the method for producing an electrode for an electric double layer capacitor includes a step of attaching the conductivity-imparting agent to the surface of the active material by mechanochemical treatment! / Is preferred.
- the powdery mixture is preferably obtained by a fluidized bed granulation method or a fluidized bed multifunctional granulation method.
- the particle size of the powder mixture is preferably from 0.1 to 1000 ⁇ m.
- the dry molding is preferably pressure molding.
- the pressure molding is preferably performed in a molding die provided with a current collector.
- the particulate elastomer is contained in an amount of 0.1 to 50 parts by mass and the carbonaceous material is contained in an amount of 50 to 99.9 parts by mass per 100 parts by mass of the powdery mixture.
- an electrode for an electric double layer capacitor obtained by the manufacturing method.
- an electric double layer capacitor having the electrode.
- the electrode layer of the electrode for an electric double layer capacitor of the present invention contains a particulate elastomer as a binder and a carbonaceous material.
- the particulate elastomer has a role of a binder.
- These particulate elastomers One can be used as a binder and mixed with the carbonaceous material in powder form to enable uniform dispersion.
- the particulate elastomer of the present invention may be formed into particles by pulverization or the like, but is preferably a polymer formed into particles by a chemical cross-linking structure.
- a polymer having a crosslinked structure the particle shape can be stably maintained.
- a polymer having a crosslinked structure can be obtained by homopolymerizing or copolymerizing a co-gen or a polyfunctional ethylenically unsaturated monomer.
- conjugated diene examples include butadiene and isoprene.
- polyfunctional ethylenically unsaturated monomer include dimethacrylic acid esters such as ethylene glycol dimethacrylate and diethylene glycol dimethacrylate; trimethylolpropane trimethacrylate And the like. Tributyl methacrylate esters; dibutyl compounds such as dibutylbenzene; and the like.
- conjugated gens and polyfunctional ethylenically unsaturated monomers may be copolymerized with monofunctional radical copolymerizable monomers.
- monofunctional radical copolymerizable monomers include: acrylate esters such as butyl acrylate and 2-ethylhexyl acrylate; methacrylate esters such as butyl methacrylate and 2-ethylhexyl methacrylate; Aromatic vinyl conjugates such as styrene; acrylo-tolyl, methacrylonitrile, etc., ⁇ -ethylenically unsaturated nitrile compounds; ethylenically unsaturated carboxylic acids such as atalilic acid, methacrylic acid, itaconic acid And the like.
- polymer preferably used as the particulate elastomer in the present invention include, for example, a copolymer using a polyfunctional ethylenically unsaturated monomer and an acrylate ester.
- Ethylene daricol dimethacrylate copolymer acrylate 2'-ethylhexyl ⁇ methacrylic acid ⁇ methacrylonitrile' Diethylene glycol dimethacrylate copolymer, butyl acrylate “Acrylonitrile.diethylene dalicol dimethatarylate copolymer”, butyl acrylate “acrylic acid” trimethylolpropane trimethacrylate copolymer and the like.
- polybutadiene, polyisoprene, a styrene-butadiene-based copolymer which may be carboxy-modified, and the like can also be preferably used.
- the particle size of the particulate elastomer is usually 0.0001 to 100 // m, preferably 0.001 to 10 ⁇ , and more preferably 0.01 to 1 ⁇ .
- the particle diameter is a number average particle diameter calculated by measuring the diameter of 100 polymer particles randomly selected in a transmission electron micrograph and calculating the arithmetic average value thereof.
- the glass transition temperature (T g) of the particulate elastomer is usually from -60 to 20 ° C, preferably from 140 to 0 ° C. If the Tg is too high, the binding force may decrease, and if the Tg is too low, the particulate elastomer may cover the active material surface and increase the internal resistance.
- the amount of the particulate elastomer used is usually 0.1 to 50 parts by mass, preferably 0.1 to 50 parts by mass, per 100 parts by mass of the powdery mixture, from the viewpoint of obtaining an electrode that provides a large capacity electric double layer capacitor. It is 1 to 20 parts by mass, more preferably 2 to 10 parts by mass.
- the carbonaceous material used in the present invention includes an “active material” made of a carbonaceous material, and optionally includes a “conductivity imparting agent”.
- the active material used in the present invention activated carbon, polyacene, graphite and the like, a specific surface area of usually 30 m 2 / g or more, is preferably more preferably 500 ⁇ 500 Om gs 1 000 ⁇ 3000m 2 / g Powder is used. Furthermore, it has graphite-like microcrystalline carbon described in Japanese Patent Application Laid-Open No. 11-317333 and Japanese Patent Application Laid-Open No. 2002-25867, etc., and the interlayer distance of the microcrystalline carbon is increased.
- Non-porous carbon can also be used as an active material.
- the active material is preferably activated carbon, and specifically, phenol-based, rayon-based, pitch-based, or coconut husk-based activated carbon can be used. When the particle diameter of the active material is 0.1 to 100 ⁇ , more preferably 1 to 20 / m, it is preferable because the thin film of the electrode for the electric double layer capacitor can be easily formed and the capacitance can be increased. No.
- Examples of the carbonaceous substance used as the conductivity-imparting agent include carbon blacks such as furnace black, acetylene black, and ketone black, and are used by being mixed with the above-mentioned active material.
- the preferred particle size of the conductivity-imparting agent is 0.1 to 100 ⁇ m.
- the conductivity-imparting agent be used by attaching it to the surface of the active material since each can be uniformly dispersed.
- a method of attaching the conductivity-imparting agent to the surface of the active material for example, there is a mechanochemical treatment in which the active material and the conductivity-imparting agent are mixed while applying a mechanical external force such as a compressive force or a shear force.
- a mechanomill, a hybridizer, a mechanofusion, or the like can be used as a device for performing the mechanochemical treatment.
- the amount of the carbonaceous material (active material and conductivity-imparting agent) used is usually 5 parts by mass per 100 parts by mass of the powdery mixture in order to obtain an electrode that provides an electric double layer capacitor having a large capacity.
- the amount is 0 to 99.9 parts by mass, preferably 70 to 98 parts by mass, and more preferably 80 to 96 parts by mass.
- the mixing ratio of the active material and the conductivity-imparting agent is 0.1 to 20 parts by mass, and preferably 2 to 10 parts by mass, per 100 parts by mass of the active material.
- the above-mentioned particulate elastomer and the carbonaceous material are mixed in a powder form to obtain a powder mixture.
- “mixing in powder form” means that the particulate elastomer and the carbonaceous material are mixed while maintaining their respective particle shapes, and includes water, a solvent, and the like as long as the particle shape can be maintained. You may go out.
- the solid concentration at the time of mixing is usually 50% by mass or more, preferably 60% by mass or more, and more preferably 70% by mass or more.
- the particulate elastomer can be maintained without agglomeration of the particulate elastomer and the carbonaceous material.
- the obtained powdery mixture contains water, a solvent, etc., it is dried if necessary and provided for dry molding.
- the mixer used for mixing is not particularly limited as long as it can mix the above-mentioned particulate elastomer and the carbonaceous material in powder form. Specifically, a Henschel mixer, an omme mixer, or the like is preferably used.
- the mixing time is usually about several seconds to 1 hour, preferably 1 to 5 minutes.
- the mixing temperature is not particularly limited, but is usually room temperature.
- the powdery mixture may be obtained by any granulation method.
- Rolling bed granulation, stirring granulation, fluidized bed granulation, and fluidized bed multifunctional granulation perform granulation by spraying particulate elastomer onto a forcedly fluidized carbonaceous material. Is the way. In each of the methods, the method of flowing the carbonaceous material is different.
- a mixing machine such as a Henschel mixer is used, and a fluid motion is forcibly given to the powder of the carbonaceous material by a stirring blade or the like provided in the container.
- the fluidized bed granulation method is a method of keeping the carbonaceous material powder suspended and suspended in an airflow that blows up from below.
- the fluidized bed multifunctional granulation method rolls into the fluidized bed granulation method This is a method in which a stirring action is used in combination.
- the temperature of the fluidized bed containing the carbonaceous material is usually from room temperature to 10 ° C, and the particulate elastomer is usually sprayed at 50 ° C to 250 ° C.
- a fluidized-bed granulation method and a fluidized-bed multifunctional granulation method are preferable because a powdery mixture having a small particle diameter can be easily obtained and the particle diameter can be easily controlled.
- the particulate elastomer used for mixing dried elastomer particles may be used. However, it is preferable to charge a carbonaceous material into a mixer and spray-add a latex particulate elastomer dispersed in water. By the spray addition, the water and the particulate elastomer are uniformly adsorbed on the carbonaceous material, and the carbonaceous material and the particulate elastomer are kept in powder form.
- the particle size of the obtained powdery mixture is generally 0.1 to 100 ⁇ , preferably 1 to 500 ⁇ , more preferably 5 to 100 ⁇ m.
- the particle diameter is a number average particle diameter calculated by measuring the diameter of 100 particles of a powdery mixture randomly selected in a transmission electron micrograph and calculating the arithmetic average value. When the particle diameter is in this range, an electrode having a smooth surface and a uniform density can be obtained.
- the powdery mixture obtained above is dry-molded to form an electrode layer.
- the dry molding of the present invention is a concept for so-called “wet molding” such as painting or spraying. Examples of such a method include a pressure molding method, a powder molding method, a roll rolling method, and an extrusion molding method. Among them, the pressure molding method is preferable.
- the powdery mixture may be used in a state containing water, a solvent, or the like, and water or a solvent may be used as a molding aid.
- the solid content concentration during molding is usually 50% by mass or more, preferably 60% by mass or more, and more preferably 70% by mass or more. These water and solvent can be removed by heating, depressurizing, or the like during or after forming the electrode layer.
- the powdery mixture is formed into a shape of an electrode layer by a single-wafer press, a roll press, or the like.
- a molding die it is preferable to use a molding die and form the electrode layer in the die.
- a series of processes such as feeding of a powdery mixture into a mold, pressure molding, and removal of a formed electrode layer can be automated, thereby enabling unmanned continuous production.
- electrodes of different sizes and shapes can be manufactured simply by changing the molding die, and can be manufactured with small-sized molding equipment, which is suitable for the production of various types of electrodes.
- the pressurizing temperature varies depending on the glass transition temperature, the particle size, and the like of the particulate elastomer, but may be selected from the range from room temperature to the decomposition temperature of the used particulate elastomer. Preferably, the temperature is 10 to 30 ° C. higher than the glass transition point T.
- the pressure depends on the temperature, but is not particularly limited as long as the desired electrode density can be obtained.
- the thickness of the electrode layer to be molded, 5 0 ⁇ 1 0 0 0 ⁇ ⁇ , the density of the electrode layer 0. 5 g Z cm is preferably 3 or more, determined in relation to the internal resistance obtained by the intended use Is received. If the internal resistance is small, the density and thickness of the electrode layer can be increased, and as a result, the energy density can be increased. However, if the density of the electrode layer is too high, the permeability of the electrolytic solution is deteriorated, so that the density is preferably 0.6 to 0.9 g / cm 3 .
- An electrode is obtained by laminating the formed electrode layer with a current collector.
- the current collector is not particularly limited as long as it is made of a conductive material.
- a metal material such as iron, copper, aluminum, nickel, and stainless steel is preferable.
- the metal material may be in the form of a sheet (metal foil), a film, or a net.
- carbon fiber fabrics, mats, conductive rubber sheets, and laminates thereof can also be used as current collectors.
- metal foil is preferred, and aluminum foil is particularly preferred.
- the thickness of the metal foil is preferably from 5 to 100 / zm, particularly preferably from 10 to 50 m.
- the current collector having a surface on which a conductive adhesive layer is formed may be used.
- the conductive binder has at least a conductivity-imparting agent and a binder.
- the conductive-imparting agent, the binder, and the dispersant added if necessary are mixed with water or an organic solvent.
- the obtained conductive adhesive is applied to a current collector and dried to form a layer of the conductive adhesive.
- the conductive adhesive improves the binding between the electrode layer and the current collector, and contributes to lowering the internal resistance.
- any of the conductivity-imparting agents exemplified in the description of the electrode component can be used.
- the binder an elastomer can be used, and the above-mentioned particulate elastomer is preferable.
- the dispersant include celluloses such as carboxymethyl cellulose, polyvinyl alcohol, polyvinyl methyl ether, polyacrylic acid (salt), oxidized starch, phosphorylated starch, casein, and various modified starches.
- the amount of each component used is such that the binder is 5 to 20 parts by mass on a dry mass basis and the dispersant is 1 to 5 parts by mass on a dry mass basis relative to 100 parts by mass of the conductivity-imparting agent. preferable. If the amount of the binder is too small, the adhesion between the electrode layer and the current collector may be insufficient. On the other hand, if the amount of the binder used is too large, the dispersion of the conductivity-imparting agent may be insufficient, and the internal resistance may increase. Also, if the amount of the dispersant used is too small, the dispersion of the conductivity-imparting agent may be insufficient. On the other hand, if the amount of the dispersant used is too large, the conductivity-imparting agent may be covered with the dispersant, and the internal resistance may increase.
- the kneader used for kneading is preferably a kneader capable of applying a shearing force from the viewpoint of making the dispersion of the conductivity imparting agent uniform, and specifically, a ball mill, a sand mill, a pigment disperser, and a crusher. , An ultrasonic dispersing machine, a homogenizer, a planetary mixer, etc. can be used.
- the method of applying the conductive adhesive to the current collector is not particularly limited. For example, it is applied by a doctor blade method, a dip method, a reverse roll method, a direct roll method, a gravure method, an etastrusion method, a brush coating, or the like.
- the amount to be applied is not particularly limited, but is adjusted so that the thickness of the conductive layer formed after drying is usually 0.5 to 10 / zm, preferably 2 to 7 ⁇ m.
- the method for obtaining an electrode by laminating the electrode layer and the current collector is not particularly limited.
- a method of laminating a metal foil of a current collector to an electrode layer formed by pressure molding or a method of vapor-depositing a metal on the electrode layer may be used.
- pressure molding of the electrode layer is performed in a molding die, the powdery mixture is supplied into a molding die provided with a current collector, and pressure molding is performed.
- the electrode layer and the current collector can be stacked, and the process can be simplified, which is preferable.
- a roll-shaped rolled metal foil coil is used as a current collector, and the metal foil is continuously drawn from the roll to form an electrode. It can be continuously laminated with the layers.
- the obtained sheet-shaped electrode may be further subjected to a press treatment to increase the electrode density.
- the electric double layer capacitor of the present invention has an electrode obtained by the above-described manufacturing method.
- the electric double layer capacitor can be manufactured according to an ordinary method using the above-mentioned electrodes, components such as an electrolytic solution and a separator.
- the electrode can be manufactured by overlapping electrodes via a separator, winding the electrode into a capacitor shape, folding it, and placing it in a container, injecting an electrolytic solution into the container and sealing the container.
- the electrolytic solution used for producing the electric double layer capacitor of the present invention is not particularly limited, but a non-aqueous electrolytic solution in which an electrolyte is dissolved in an organic solvent is preferable.
- any of conventionally known electrolytes can be used, such as tetraethylammoniumtetrafluoroporate, triethylmonomethylammoniumtetrafluoroborate and tetraethylammonium-dimethylhexafluorophosphate. And so on.
- the solvent for dissolving these electrolytes is not particularly limited as long as it is generally used as an electrolyte solvent.
- Specific examples include carbonates such as propylene carbonate, ethylene carbonate and butylene carbonate; ratatatones such as monobutyrolactone; sulfolanes; nitriles such as acetonitrile; It can be used as the above mixed solvent. Among them, carbonates are preferred.
- the concentration of the electrolytic solution is usually 0.5 mol / L or more, preferably 0.8 mol / L or more.
- separator known materials such as a microporous membrane or nonwoven fabric made of polyolefin such as polyethylene and polypropylene, and a porous membrane mainly made of pulp called electrolytic capacitor paper can be used. Also, instead of a separator, a solid Electrolyte or gel electrolyte may be used
- the particle size of the polymer and the powdery mixture in this example was determined by measuring the diameter of 100 randomly selected particles in a transmission electron micrograph and calculating the number average particle size as the arithmetic average value. Yes, the glass transition temperature (Tg) of the polymer was measured by a differential scanning calorimeter (DSC) at 10 ° C / min.
- Activated carbon (particle size 8 zm, specific surface area 2000 m 2 / g) While stirring 70 parts with a Henschel mixer, carboxy-modified styrene-butadiene copolymer particles having a cross-linked structure (Tg-5 ° C, particle size 0. 20 parts of a 40% aqueous dispersion (12 ⁇ ) was spray-added over 10 minutes. Then, 20 parts of acetylene black was added over 10 minutes and mixed to obtain a powdery mixture having a particle diameter of 163 ⁇ m.
- Acetylene black 100 parts, 10% carboxymethylcellulose aqueous solution (Seguchi Gen 7 ⁇ ; Daiichi Kogyo Seiyaku Co., Ltd.) 20 parts, carboxy-modified styrene 'butadiene copolymer latex ( ⁇ -400 ⁇ ; Nippon Zeon Co., Ltd.) , 40% aqueous dispersion) 31.3 parts, soft water 10.2 parts were kneaded with a kneader, and then diluted with soft water to obtain a conductive adhesive with a solid concentration of 30% (measured by light scattering method). An average particle diameter of acetylene black: 0.5 / m) was obtained.
- This conductive adhesive is applied to a 30 ⁇ thick aluminum foil, dried, and A current collector having a conductive adhesive layer of 5 ⁇ was obtained.
- the current collector was cut into a rectangle of 4 cm ⁇ 6 cm, and placed on a mold bottom of 4 cm ⁇ 6 cm, with the surface having the conductive adhesive layer facing upward, and the powder was powdered.
- a 40 / m-thick cellulose fiber separator is sandwiched so that the electrode layer is on the inside, and 2 mm thick, 5 cm wide, and 7 cm high from both sides.
- An element was sandwiched between two glass plates.
- the above element was heated under reduced pressure at 200 ° C for 3 hours to remove impurities from the element, and then impregnated with an electrolyte under reduced pressure and placed in a rectangular bottomed cylindrical container made of polypropylene.
- an electrolyte a solution in which triethyl monomethylammonium tetrafluoroborate was dissolved in propylene carbonate at a concentration of 1.5 mol / L was used.
- a 40% aqueous dispersion of carboxy-modified styrene / putadiene copolymer particles a 40% aqueous dispersion of 2_ethylhexyl acrylate / methacrylic acid / acrylonitrile / ethylene glycol dimethacrylate copolymer particles (particle diameter : 15 ⁇ , ⁇ ⁇ : - 5 0 ° C) except for using the electrode layer in the same manner as in example 1 to prepare an electrode and electric double layer Capacity data.
- Example 2 While stirring 170 parts of activated carbon with a Henschel mixer, 20 parts of acetylene black was added and mixed over 10 minutes. Next, the same as in Example 1 except that 20 parts of a 40% aqueous dispersion of carboxy-modified styrene'butadiene copolymer particles was added by spraying over 10 minutes and mixed to obtain a powdery mixture having a particle diameter of 144 ⁇ m. Thus, an electrode layer and an electrode electric double layer capacitor were produced.
- Example 2 To a mixture consisting of 160 parts of activated carbon, 20 parts of carbon black and 20 parts of PTFE powder, the same as that used in Example 1, 104 parts of ethanol was added and mixed. This mixture was preformed into a rectangular parallelepiped, and paste extrusion was performed using a nozzle having an extrusion drawing ratio of 40 and a rectangular cross section. Using the obtained extrudate, pressure molding was carried out in the same manner as in Example 1, dried at 250 ° C. for 30 minutes to remove ethanol, and an electrode layer sheet having a thickness of 300 ⁇ was obtained. An electrode having an electrode layer thickness of 300 ⁇ was formed. Using the obtained electrodes, an electric double layer capacitor was produced in the same manner as in Example 1.
- Example 16 parts by weight of the same activated carbon as used in Example 1 and 20 parts by weight of carbon black were mixed and dispersed in a xylene solution of styrene-butadiene rubber having no crosslinked structure produced by solution polymerization, and dried. After removing xylene, pressure molding was performed in the same manner as in Example 1 to form an electrode layer sheet having a thickness of 300 ⁇ m and an electrode having an electrode layer thickness of 300 ⁇ m. An electric double layer capacitor was produced in the same manner as in Example 1 using the obtained electrodes.
- Example 2 The same aqueous dispersion of the carboxy-modified styrene / putadiene copolymer particles used in Example 1 was further diluted with water to obtain an aqueous dispersion having a rubber particle concentration of 1%. To 800 parts of this aqueous dispersion of rubber particles, 170 parts of the same activated carbon and 20 parts of carbon black as those used in Example 1 were added and mixed with stirring. The mixed solution was dried to remove water, and the obtained aggregate was pulverized and granulated, and the obtained powder was pressed and molded in the same manner as in Example 1 to obtain an electrode layer sheet having a thickness of 300 ⁇ . An electrode having a thickness of 300 ⁇ was formed. An electric double layer capacitor was produced in the same manner as in Example 1 using the obtained electrode.
- Electrode layer, electrode and electric double layer in the same manner as in Example 1 except that 8 parts of polyethylene powder having a particle diameter of 20 / zm was used instead of the aqueous dispersion of carboxy-modified styrene / butadiene copolymer particles. A capacitor was created. Evaluation of Electrode Layer, Electrode and Electric Double Layer Capacitor>
- the measurement was performed according to JIS K 6251. After drying the sheet-shaped electrode layer at 250 ° C for 1 hour, it is punched into the shape of a No. 1 dumbbell-shaped test piece, and subjected to a tensile test at an ambient temperature of 25 ° C at a tensile speed of 2 O mmZ minutes. The maximum load was measured. This measurement was repeated three times, and the value obtained by dividing the average value of the maximum load by the cross-sectional area of the sheet was defined as the tensile strength of the electrode layer. In order to measure the tensile strength of the sheet in the roll-rolled direction, the dumbbell-shaped test piece was punched out so that the length direction was the roll-rolled extrusion direction. The higher the tensile strength of the electrode layer, the less likely it is for cracks and rupture to occur, and the better the shape retention.
- the obtained electric double layer capacitor electrode is cut into two rectangular pieces of 10 O mm in length and 5 O mm in width to form test pieces, and measured according to the method described in JISK 560-5-1. did.
- the test device used was a type 1 device, and the diameter of the cylindrical mandrel at the bent portion was 25 mm and 32 mm.
- the test piece was attached to a test device, and the hinge was bent at 180 ° from a horizontal state. Cracks on the electrode were observed with a loupe, and the evaluation was made according to the following criteria.
- the battery was charged from 0 V to 2.7 V with a constant current of 1 O mAZ cm 2 for 10 minutes, and then discharged at a constant current of 1 mA / cm 2 until OV.
- the capacitance was determined from the obtained charge / discharge curve, and the capacitance per unit mass of the electrode layer was calculated by dividing the mass of the electrode by the mass of the electrode layer obtained by subtracting the mass of the current collector from the mass of the electrode. .
- the internal resistance was calculated from the charge / discharge curve in accordance with the calculation method of the RC-2377 standard specified by the Japan Electronics and Information Technology Industries Association. table 1
- Table 1 shows that according to the present invention (Examples 1 to 4), an electric double layer capacitor having excellent electrode layer strength, large capacity, and low internal resistance can be obtained. Comparative Examples 1 to 4 were inferior to the Examples, particularly in the capacity and internal resistance.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020057025233A KR101046860B1 (ko) | 2003-06-30 | 2004-06-30 | 전기 이중층 캐패시터용 전극의 제조방법 |
JP2005511154A JP4678302B2 (ja) | 2003-06-30 | 2004-06-30 | 電気二重層キャパシタ用電極の製造方法 |
US10/562,554 US8124474B2 (en) | 2003-06-30 | 2004-06-30 | Method for producing electrode for electric double layer capacitor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003186986 | 2003-06-30 | ||
JP2003-186986 | 2003-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005001861A1 true WO2005001861A1 (ja) | 2005-01-06 |
Family
ID=33549710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/009578 WO2005001861A1 (ja) | 2003-06-30 | 2004-06-30 | 電気二重層キャパシタ用電極の製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8124474B2 (ja) |
JP (1) | JP4678302B2 (ja) |
KR (1) | KR101046860B1 (ja) |
CN (1) | CN1816886A (ja) |
WO (1) | WO2005001861A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006282812A (ja) * | 2005-03-31 | 2006-10-19 | Japan Vilene Co Ltd | 積層体の製造方法 |
JP2007059899A (ja) * | 2005-07-29 | 2007-03-08 | Koei Chem Co Ltd | 電気化学素子 |
WO2007108524A1 (ja) * | 2006-03-17 | 2007-09-27 | Japan Gore-Tex Inc. | 電気二重層キャパシタ用電極および電気二重層キャパシタ |
WO2011019951A1 (en) | 2009-08-12 | 2011-02-17 | Pure Bioscience | Formulations and methods employing anhydrous disinfectant |
JP2017525087A (ja) * | 2014-06-03 | 2017-08-31 | アーケマ・インコーポレイテッド | 無溶媒の電極製造 |
CN115881893A (zh) * | 2023-02-20 | 2023-03-31 | 四川新能源汽车创新中心有限公司 | 薄膜极片及其制备方法和应用 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4894282B2 (ja) * | 2005-08-26 | 2012-03-14 | パナソニック株式会社 | 電気二重層キャパシタ |
CN103268827A (zh) * | 2013-03-06 | 2013-08-28 | 吉林大学 | 一种超级电容器电极活性材料的制备方法 |
CN115579248A (zh) | 2016-05-20 | 2023-01-06 | 京瓷Avx元器件公司 | 在高温下使用的超级电容器 |
US11476454B2 (en) * | 2016-06-03 | 2022-10-18 | Robert Bosch Gmbh | Method for preparing negative electrode material for battery, lithium ion battery and solid-state battery |
JP7358804B2 (ja) * | 2019-07-04 | 2023-10-11 | 日本ケミコン株式会社 | 電極体、電極体を備える電解コンデンサ、及び電極体の製造方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6216506A (ja) * | 1985-03-06 | 1987-01-24 | 株式会社村田製作所 | 電気二重層コンデンサの製造方法 |
JPS63104316A (ja) * | 1986-10-21 | 1988-05-09 | 中村 儀郎 | 電気二重層キヤパシタ |
JPS63151010A (ja) * | 1986-12-16 | 1988-06-23 | 太陽誘電株式会社 | 電気二重層コンデンサ |
JPH0439862A (ja) * | 1990-06-04 | 1992-02-10 | Mitsubishi Petrochem Co Ltd | 二次電池電極 |
JPH0467610A (ja) * | 1990-07-09 | 1992-03-03 | Matsushita Electric Ind Co Ltd | 電気二重層コンデンサの分極性電極の製造方法 |
JPH04294515A (ja) * | 1991-03-25 | 1992-10-19 | Matsushita Electric Ind Co Ltd | エネルギー貯蔵素子 |
JPH06196364A (ja) * | 1992-12-22 | 1994-07-15 | Fuji Elelctrochem Co Ltd | コイン形電気二重層コンデンサーの製造方法 |
JPH09306798A (ja) * | 1996-05-10 | 1997-11-28 | Kansai Coke & Chem Co Ltd | 電気二重層コンデンサ用の一体型電極の製造方法 |
JPH11288721A (ja) * | 1998-02-06 | 1999-10-19 | Sekisui Chem Co Ltd | 非水電解質二次電池用結着剤及び非水電解質二次電池及びそれらの製造方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6158850A (ja) * | 1984-08-31 | 1986-03-26 | 株式会社村田製作所 | 炭素質成形体 |
JPH07105316B2 (ja) | 1985-08-13 | 1995-11-13 | 旭硝子株式会社 | 電気二重層コンデンサ用分極性電極及びその製造方法 |
JPH0744127B2 (ja) | 1989-03-08 | 1995-05-15 | 株式会社村田製作所 | 電気二重層コンデンサ用分極性電極の製造方法 |
JPH0422062A (ja) | 1990-05-15 | 1992-01-27 | Kuraray Chem Corp | 分極性電極板 |
JPH07161589A (ja) * | 1993-12-06 | 1995-06-23 | Nisshinbo Ind Inc | 電気二重層キャパシタ |
JPH08250380A (ja) | 1995-03-07 | 1996-09-27 | Matsushita Electric Ind Co Ltd | 分極性電極およびその製造方法 |
US5604057A (en) * | 1995-11-27 | 1997-02-18 | General Motors Corporation | Secondary cell having a lithium intercolating manganese oxide |
JP4108136B2 (ja) * | 1997-03-11 | 2008-06-25 | 日本ゼオン株式会社 | 導電性エラストマーフィルム、その製造方法、および導電性エラストマー組成物 |
JP3780530B2 (ja) * | 1997-06-16 | 2006-05-31 | 松下電器産業株式会社 | 電気二重層キャパシタ及びその製造方法 |
JPH1199514A (ja) * | 1997-07-28 | 1999-04-13 | Matsushita Electric Ind Co Ltd | セラミックスラリーの製造方法及びセラミック電子部品の製造方法 |
JP3661382B2 (ja) | 1997-12-01 | 2005-06-15 | Jsr株式会社 | 電気二重層コンデンサ電極用バインダー |
JP4117056B2 (ja) * | 1998-01-20 | 2008-07-09 | 株式会社クレハ | 電気二重層キャパシタ電極用炭素材の製造方法 |
JP4379925B2 (ja) * | 1998-04-21 | 2009-12-09 | 住友金属工業株式会社 | リチウムイオン二次電池の負極材料に適したグラファイト粉末 |
US6800222B1 (en) * | 1999-08-10 | 2004-10-05 | Honda Giken Kogyo Kabushiki Kaisha | Electrode for electric double-layer capacitor, and slurry for forming the same |
JP5239111B2 (ja) * | 2000-04-07 | 2013-07-17 | ダイキン工業株式会社 | 電極用添加剤 |
JP4356294B2 (ja) * | 2001-09-03 | 2009-11-04 | 日本ゼオン株式会社 | 電極用バインダー組成物、電極用スラリー、電極、および電池 |
US7326497B2 (en) * | 2001-12-21 | 2008-02-05 | Samsung Sdi Co., Ltd. | Graphite-containing composition, negative electrode for a lithium secondary battery, and lithium secondary battery |
-
2004
- 2004-06-30 CN CNA2004800188123A patent/CN1816886A/zh active Pending
- 2004-06-30 JP JP2005511154A patent/JP4678302B2/ja not_active Expired - Fee Related
- 2004-06-30 US US10/562,554 patent/US8124474B2/en not_active Expired - Fee Related
- 2004-06-30 KR KR1020057025233A patent/KR101046860B1/ko active IP Right Grant
- 2004-06-30 WO PCT/JP2004/009578 patent/WO2005001861A1/ja active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6216506A (ja) * | 1985-03-06 | 1987-01-24 | 株式会社村田製作所 | 電気二重層コンデンサの製造方法 |
JPS63104316A (ja) * | 1986-10-21 | 1988-05-09 | 中村 儀郎 | 電気二重層キヤパシタ |
JPS63151010A (ja) * | 1986-12-16 | 1988-06-23 | 太陽誘電株式会社 | 電気二重層コンデンサ |
JPH0439862A (ja) * | 1990-06-04 | 1992-02-10 | Mitsubishi Petrochem Co Ltd | 二次電池電極 |
JPH0467610A (ja) * | 1990-07-09 | 1992-03-03 | Matsushita Electric Ind Co Ltd | 電気二重層コンデンサの分極性電極の製造方法 |
JPH04294515A (ja) * | 1991-03-25 | 1992-10-19 | Matsushita Electric Ind Co Ltd | エネルギー貯蔵素子 |
JPH06196364A (ja) * | 1992-12-22 | 1994-07-15 | Fuji Elelctrochem Co Ltd | コイン形電気二重層コンデンサーの製造方法 |
JPH09306798A (ja) * | 1996-05-10 | 1997-11-28 | Kansai Coke & Chem Co Ltd | 電気二重層コンデンサ用の一体型電極の製造方法 |
JPH11288721A (ja) * | 1998-02-06 | 1999-10-19 | Sekisui Chem Co Ltd | 非水電解質二次電池用結着剤及び非水電解質二次電池及びそれらの製造方法 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006282812A (ja) * | 2005-03-31 | 2006-10-19 | Japan Vilene Co Ltd | 積層体の製造方法 |
JP2007059899A (ja) * | 2005-07-29 | 2007-03-08 | Koei Chem Co Ltd | 電気化学素子 |
WO2007108524A1 (ja) * | 2006-03-17 | 2007-09-27 | Japan Gore-Tex Inc. | 電気二重層キャパシタ用電極および電気二重層キャパシタ |
JP2007251025A (ja) * | 2006-03-17 | 2007-09-27 | Japan Gore Tex Inc | 電気二重層キャパシタ用電極および電気二重層キャパシタ |
WO2011019951A1 (en) | 2009-08-12 | 2011-02-17 | Pure Bioscience | Formulations and methods employing anhydrous disinfectant |
JP2017525087A (ja) * | 2014-06-03 | 2017-08-31 | アーケマ・インコーポレイテッド | 無溶媒の電極製造 |
JP2020191299A (ja) * | 2014-06-03 | 2020-11-26 | アーケマ・インコーポレイテッド | 無溶媒の電極製造 |
JP7012433B2 (ja) | 2014-06-03 | 2022-01-28 | アーケマ・インコーポレイテッド | 無溶媒の電極製造 |
CN115881893A (zh) * | 2023-02-20 | 2023-03-31 | 四川新能源汽车创新中心有限公司 | 薄膜极片及其制备方法和应用 |
Also Published As
Publication number | Publication date |
---|---|
US20060139846A1 (en) | 2006-06-29 |
KR20060032157A (ko) | 2006-04-14 |
JPWO2005001861A1 (ja) | 2006-08-10 |
CN1816886A (zh) | 2006-08-09 |
KR101046860B1 (ko) | 2011-07-06 |
JP4678302B2 (ja) | 2011-04-27 |
US8124474B2 (en) | 2012-02-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101245055B1 (ko) | 전기화학 소자 전극용 복합 입자, 전기화학 소자 전극용 복합 입자의 제조 방법 및 전기화학 소자 전극 | |
JP4687458B2 (ja) | 電気化学デバイス用電極の製造方法 | |
KR101998658B1 (ko) | 전기 화학 소자용 전극 | |
JP4543634B2 (ja) | 電極層形成用材料 | |
JP4978467B2 (ja) | 電気化学素子電極材料および複合粒子 | |
JP4605467B2 (ja) | 電気化学素子の製造方法 | |
WO2010035827A1 (ja) | 電気化学素子用電極の製造方法 | |
JP2020501338A (ja) | 導電性フレークで強化された、ポリマー安定化電極用組成物、及び、その製造方法 | |
WO2005117043A1 (ja) | 電気化学デバイス用電極の製造方法及びその装置 | |
JP4432906B2 (ja) | 電気二重層キャパシタ用バインダー | |
KR20080077995A (ko) | 전기 2중층 캐패시터 | |
JP2014175232A (ja) | 電池用セパレータ | |
JP2010109354A (ja) | 電気化学素子用電極の製造方法 | |
JP4678302B2 (ja) | 電気二重層キャパシタ用電極の製造方法 | |
WO2014030735A1 (ja) | 鉛蓄電池用キャパシタ電極、鉛キャパシタ蓄電池、鉛蓄電池用キャパシタ電極の製造方法および鉛キャパシタ蓄電池の製造方法 | |
WO2019013218A1 (ja) | 電気化学素子用部材の製造方法及び電気化学素子用積層体 | |
JP6569198B2 (ja) | 鉛蓄電池用キャパシタ電極および鉛蓄電池用キャパシタ電極の製造方法 | |
WO2008123577A1 (ja) | 炭素粒子フィルム、積層電極、および電気二重層キャパシタの製造方法 | |
JP6349945B2 (ja) | 鉛蓄電池用キャパシタ電極組成物層向け複合粒子、及び鉛蓄電池用キャパシタ電極組成物層の製造方法 | |
JP4507517B2 (ja) | 電気二重層キャパシタ用電極の製造方法 | |
JP6394203B2 (ja) | 鉛蓄電池用キャパシタ電極 | |
CN110634687A (zh) | 一种电极的制造工艺 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005511154 Country of ref document: JP |
|
ENP | Entry into the national phase |
Ref document number: 2006139846 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10562554 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020057025233 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20048188123 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 1020057025233 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 10562554 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |