WO2005064630A1 - キャパシタ用電極の製造方法 - Google Patents
キャパシタ用電極の製造方法 Download PDFInfo
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- WO2005064630A1 WO2005064630A1 PCT/JP2004/019446 JP2004019446W WO2005064630A1 WO 2005064630 A1 WO2005064630 A1 WO 2005064630A1 JP 2004019446 W JP2004019446 W JP 2004019446W WO 2005064630 A1 WO2005064630 A1 WO 2005064630A1
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- electrode
- layer
- undercoat layer
- electrode layer
- current collector
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Classifications
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- 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
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
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- 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
- H01G11/84—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
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- 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
- H01G11/74—Terminals, e.g. extensions of current collectors
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- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/43—Electric condenser making
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/43—Electric condenser making
- Y10T29/435—Solid dielectric type
Definitions
- the present invention relates to a method for manufacturing an electrode for an electric double layer capacitor.
- Electrochemical capacitors such as electric double layer capacitors are expected to be used as, for example, power supplies for power-up of portable equipment (small electronic equipment) and auxiliary power supplies for electric vehicles and hybrid vehicles. Various considerations have been made for.
- the electrodes used in the electric double layer capacitor are formed by filtering fibrous activated carbon into a filter and depositing or adhering a current collector such as aluminum on one side, or granulating activated carbon by using tetrafluoroethylene such as ethylene. It is known that the mixture is kneaded with a binder, formed into a sheet, and a current collector is deposited or adhered to one side thereof.
- a kneaded material composed of a porous material such as activated carbon and a binder was formed into a sheet shape.
- a flat electrode in which a polarizable electrode (electrode layer) is adhered to a current collector via an intermediate layer composed of a car pump rack and a binder has been proposed.
- Attempts have been made to improve adhesion and reduce contact resistance for example, Japanese Patent Application Laid-Open No. 2000-2008373, Japanese Patent Application Laid-Open No. 2000-21084) Japanese Unexamined Patent Application Publication No. 2000-75058, Japanese Patent Application Publication No. 200502-506).
- the electrode layer is formed in a sheet shape in advance, and the sheet-like electrode layer and the current collector are adhered to each other through an intermediate layer to produce an electrode. For this reason, the electrode layer needs to have a thickness that satisfies mechanical strength enough to maintain the shape of the sheet, and it has been difficult to reduce the thickness of the electrode layer. Disclosure of the invention
- the present inventors have made intensive studies in order to reduce the thickness of the electrode layer and to reduce the size and weight of the electrode.
- a method of forming an undercoat layer containing conductive particles and a binder on the current collector by coating and forming an electrode layer containing a carbon material and a binder on the undercoat layer by coating.
- an electrode having a thinned electrode layer and having excellent adhesion between the electrode layer and the current collector can be obtained.
- a coating liquid for an undercoat layer containing conductive particles, a binder and a solvent, and a coating liquid for an electrode layer containing a carbon material, a binder and a solvent are used. Some were insufficient.
- An object of the present invention is to provide a method for manufacturing an electrode for an electric double layer capacitor, which can obtain an electrode having excellent electrode characteristics with good manufacturing suitability by using a coating liquid having a good dispersion state.
- SUMMARY OF THE INVENTION '' The present inventors have further studied and found that an underlayer containing conductive particles, a binder and a solvent is included.
- a dispersion treatment using a ceramic bead as a dispersion medium can be performed to obtain a coating liquid for an undercoat layer having a good dispersion state. It was found that when preparing an electrode layer coating solution containing a solvent and a solvent, a dispersion treatment was performed using ceramic beads as a dispersing medium to obtain a well-dispersed electrode layer coating solution.
- the present invention includes the following inventions.
- a method for producing a capacitor electrode including a current collector and an electrode layer on the current collector comprising mixing at least a carbon material, a binder, and a solvent, and using the mixture as a dispersion medium with ceramic beads.
- a method for producing an electrode for a capacitor comprising the steps of: preparing a coating solution for an electrode layer by performing a dispersion treatment; and then applying the coating solution for an electrode layer on a current collector to form an electrode layer.
- a method for manufacturing a capacitor electrode including a current collector, an undercoat layer on the current collector, and an electrode layer on the undercoat layer,
- At least the conductive particles, the binder and the solvent are mixed, and the mixture is dispersed using ceramic beads as a dispersion medium to prepare a coating solution for the undercoat layer. Thereafter, the undercoat layer is formed on the current collector.
- a method for manufacturing a capacitor electrode including a current collector, an undercoat layer on the current collector, and an electrode layer on the undercoat layer,
- At least the conductive particles, the binder, and the solvent are mixed, and the mixture is dispersed using ceramic peas as a dispersion medium to prepare a coating solution for the undercoat layer. Thereafter, the undercoat layer is formed on the current collector.
- At least a carbon material, a binder, and a solvent are mixed, and the mixture is dispersed using ceramic beads as a dispersion medium to prepare a coating solution for an electrode layer. Applying a coating solution for an electrode layer thereon to form an electrode layer.
- a dispersion treatment is performed using ceramic beads as a dispersion medium, so that the undercoat layer in a good dispersion state without agglomerates is formed.
- a coating solution is prepared. As a result, an undercoat layer having excellent manufacturing suitability and a binder uniformly dispersed is formed, and strong adhesion between the current collector and the electrode layer can be obtained.
- the coating solution for the electrode layer in a good dispersion state without agglomerates is obtained by performing a dispersion treatment using ceramic beads as a dispersion medium. Is prepared. Therefore, an electrode layer having excellent manufacturing suitability and excellent electrode characteristics can be obtained.
- an electrode for an electric double layer capacitor having excellent electrode characteristics can be manufactured with good manufacturing suitability.
- the electrode for an electric double layer capacitor manufactured in the present invention mainly includes a current collector, an undercoat layer on the current collector, and an electrode layer on the undercoat layer.
- a lead used as an electrode connection terminal is usually formed at the end of the current collector.
- the current collector is not particularly limited as long as it is a good conductor capable of sufficiently transferring charges to the electrode layer via the undercoat layer, and a known current collector used for a capacitor electrode is used. be able to.
- the current collector includes a metal foil such as aluminum, and the metal foil includes an etched foil and a rolled foil.
- Preferred current collectors include aluminum etching foil.
- the thickness of the current collector is preferably 20 to 50 from the viewpoint of reducing the size and weight of the electrode. More preferably, it is 20 to 30 / zm.
- the undercoat layer is disposed between the current collector and the electrode layer, and makes the current collector and the electrode layer physically and electrically adhere to each other.
- the undercoat layer contains at least conductive particles and a binder capable of binding to the conductive particles as its constituent materials.
- An undercoat layer is formed by applying a coating liquid for an undercoat layer containing conductive particles, a binder, and a solvent on the current collector.
- the conductive particles are not particularly limited as long as the particles have electron conductivity capable of sufficiently progressing the charge transfer between the current collector and the electrode layer, and include, for example, a carbon material having electron conductivity. Particles. Examples of carbon materials include car pump racks and graphite from the viewpoint of electron conductivity. From the viewpoint of electron conductivity, the carbon material particles have a lattice spacing (d. 2 ) determined by X-ray diffraction of 0.335 to 0.338 nm, and a large thickness of crystallites. Preferably, the (Lc. 2 ) is 50 to 80 nm.
- Examples of the force pump rack include acetylene black, Ketjen black, channel black, furnace black, and thermal black. Among them, acetylene black is preferable.
- the average particle size of the force pump rack is preferably 25 to 50 nm, the BET specific surface area is preferably 50 m 2 / g or more, and more preferably 50 to 140 m 2 / g.
- Examples of the graphite include natural graphite, artificial graphite, expanded graphite, and the like. Among these, artificial graphite is preferable.
- the average particle size of the graphite is preferably 4 to 6 m, and the specific surface area is preferably 10 m 2 / g or more, more preferably 15 to 30 m 2 / g. By using such graphite, excellent electron conductivity can be imparted to the undercoat layer, and the internal resistance is reduced.
- As the carbon material only one of the force pump rack and graphite may be used, or two or more thereof may be used in combination.
- the binder of the undercoat layer is not particularly limited as long as it is a binder capable of binding to the conductive particles.
- PTF E polytetrafluoroethylene
- PVDF polyfutsudani vinylidene
- PE Polyethylene
- PP polypropylene
- fluororubber is preferable.
- fluorine rubber examples include vinylidene fluoride-hexafluropolypropylene (VDF-HFP) copolymer, vinylidene fluoride-hexafluropropylene-tetrafluoroethylene (VDF-HFP-TFE) copolymer Polymer, vinylidene fluoride-pentafluoropropylene (VDF-PFP) copolymer, vinylidene fluoride-pentafluoropropylene-tetrafluoroethylene (VDF-PFP-TFE) copolymer, pinylidene fluoride 1-perfluoromethylvinylether-tetrafluoroethylene (VDF-PFMVE-TFE) copolymer, vinylidene fluoride-chlorotrifluoroethylene (VDF-CTFE) copolymer, ethylene-tetrafluoroethylene And a propylene-tetrafluoroethylene-based copolymer.
- VDF-HFP
- VDF-HFP-TFE-based copolymers are particularly preferred.
- the binder one of the above may be used alone, or two or more may be used in combination.
- the amount of the binder varies depending on the specific surface area of the conductive particles, the strength of the target electrode, and the like, but is preferably 30 to 80% by weight of the undercoat layer dry coating film (conductive particles + binder). 50-70% by weight is preferred.
- the solvent used for the undercoat layer coating solution is not particularly limited as long as it can dissolve the binder, and a general organic solvent can be used.
- the organic solvent include saturated hydrocarbons such as hexane, aromatic hydrocarbons such as toluene and xylene, alcohols such as methanol, ethanol, propanol, and ptanol, acetone, and methyl alcohol.
- Ketones such as methyl ketone (MEK), methyl isobutyl ketone (MlBK :) and diisobutyl ketone; esters such as ethyl acetate and butyl acetate; ethers such as tetrahydrofuran, dioxane and diethyl ether; Amides, such as dimethylformamide, N-methylpyrrolidone, N, N-dimethylacetamide; and octogenated hydrocarbons, such as ethylene chloride and chlorobenzene.
- ketone-based and amide-based solvents are preferred because they can dissolve fluororubber. These solvents can be used alone or in combination of two or more.
- the amount of the solvent in the undercoat layer coating solution is preferably about 600 to 200 parts by weight based on 100 parts by weight of the total amount of the conductive particles and the binder. It may be appropriately determined in consideration of the suitability for application and the like.
- a slurry is obtained by mixing or kneading the conductive particles, binder, and solvent in a conventional manner.
- Mixing or kneading can be performed using, for example, a roll mill, a planetary mixer, an open kneader, a continuous kneader, a pressure kneader, or the like.
- the obtained slurry is subjected to dispersion treatment using ceramic beads as a dispersion medium to obtain a coating liquid for an undercoat layer.
- the ceramic beads Jirukonia (Z r 0 2) beads, alumina (AI 2 0 3) beads, titania (T i 0 2) bicycloalkyl one's and the like, high from the point of view of improving the distributed efficient gravity zirconate
- the use of double aviation is preferred.
- the particle size of the ceramic beads is preferably about 0.1 to 1.0 mm, more preferably 0.1 to 0.8 mm, in order to improve dispersibility. The smaller the particle size of the bead, the finer the dispersion (the better the dispersion) becomes possible.
- the particle size of the bead is too small, the re-collision energy with one smaller bead mass is reduced. Therefore, the dispersibility tends to be poor.
- the particle size of the beads is as small as 0.1 mm, the effect of improving the dispersibility cannot be obtained at all, and if the beads are worn out for a long time and the particle size becomes small, the screen of the dispersing machine is used. Or the beads kept inside the disperser leak out of the screen etc. It is feared that it will be mixed into the paint.
- the particle size of the beads is larger than 1 ⁇ O mm, the workability tends to be poor because long-time dispersion is required.
- the residence time of the slurry in the disperser is preferably about 0.1 to 60 minutes, more preferably 1 to 5 minutes. With a residence time of less than 0.1 minute, the dispersing treatment is insufficient, and it is difficult to obtain sufficient adhesion of the undercoat layer. On the other hand, since sufficient dispersion treatment is performed with a residence time of 60 minutes, there is no need to set a residence time exceeding 60 minutes.
- the residence time is defined by the following equation.
- the bead filling rate is preferably 60 to 85% by weight.
- the bead filling rate is defined by the following equation. Bead filling rate (% by weight)
- the prepared undercoat layer coating solution is applied on a current collector and dried.
- coating solution for the undercoat layer on the current collector is performed by the reverse roll method, direct roll method, blade method, knife method, extrusion nozzle method, curtain method, gravure opening method, and vacuum coating. It can be carried out by a generally well-known coating method such as a dip method, a kiss coat method, a squeeze method and the like.
- a good coating layer surface condition can be obtained by selecting the solvent composition of the coating solution and drying conditions so that the coating is applied at a speed of 5 to 100 m / min while running the current collector. be able to.
- the drying temperature is preferably from 50 to 150 ° C, more preferably from 70 to 140 ° C. If the temperature is lower than 50 ° C, the solvent may not be sufficiently dried, and if the temperature exceeds 150 ° C, the surface state of the undercoat layer may be deteriorated because the evaporation rate of the solvent is too rapid.
- the thickness of the undercoat layer is preferably about 0.2 ⁇ ⁇ to 10 / zm from the viewpoint of reducing the size and weight of the electrode and from the viewpoint of good electrical conductivity between the current collector and the electrode layer. .
- the electrode layer is formed on the undercoat layer and is a layer that contributes to the storage and discharge of electric charges.
- a carbon material having electrical conductivity and a binder that can be bound to the carbon material are used. It contains at least.
- An electrode layer is formed by applying an electrode layer coating solution containing a carbon material, a binder, and a solvent on the undercoat layer.
- the carbon material is not particularly limited as long as it is a carbon material having electric conductivity, and examples thereof include granular or fibrous activated carbon that has been activated.
- the average particle diameter is preferably. 3 to 2 0 / zm of the carbon material, BET specific surface area of 1 5 0 0 m 2 / g or more, preferably 2 0 0 0 ⁇ 2 5 0 0 m 2 / g is good Li .
- the binder for the electrode layer is not particularly limited as long as it is a binder capable of binding to the carbon material.
- the binder include those similar to those exemplified as the binder for the undercoat layer. Fluorine rubber is preferred.
- the fluororubber include the same as those exemplified as the binder for the undercoat layer.
- two kinds selected from the group consisting of VDF, ["!?” VDF-HFP-TFE copolymers are particularly preferred from the viewpoint of improved adhesion to the undercoat layer and improved chemical resistance. It is also possible to use the same binder in both the undercoat layer and the electrode layer, and to obtain better adhesion between the undercoat layer and the electrode layer. Is preferred.
- the amount of the binder varies depending on the specific surface area of the carbon material, the strength of the target electrode, and the like.
- the electrode layer dry coating film (the carbon material + the binder + the conductive agent used as necessary as described below) Agent), is preferably 5 to 20% by weight, particularly preferably 8 to 15% by weight.
- the amount of the binder having a higher binding performance to the carbon material may be smaller.
- a conductive assistant is used as necessary.
- the conductive assistant is used for the purpose of assisting charge transfer between the electrode layer and the current collector.
- the conductive assistant is not particularly limited as long as it is a material having electron conductivity, and examples thereof include carbon materials such as force pump racks and graphite described as the conductive particles of the undercoat layer.
- As the conductive additive acetylene black having the above-mentioned average particle size and BET specific surface area is preferable because of its high electron conductivity.
- the compounding amount of the conductive additive is preferably 0.5 to 2.0% by weight in the electrode layer dry coating film.
- the solvent used in the electrode layer coating solution is not particularly limited as long as the binder can be dissolved. General organic solvents can be used.
- organic solvent examples include the same ones as those exemplified as the organic solvent of the coating liquid for the undercoat layer.
- Ketone-based and amide-based solvents are preferable because they can dissolve the fluororubber. These solvents can be used alone or as a mixture of two or more.
- the compounding amount of the solvent in the electrode layer coating liquid is 200 to 400 parts by weight with respect to 100 parts by weight of the total amount of the carbon material, the binder, and the conductive assistant used as needed. And about Good. It may be appropriately determined in consideration of the suitability for application and the like.
- a slurry is obtained by mixing or kneading the carbon material, the binder, and the solvent according to a conventional method.
- Mixing or kneading can be performed using, for example, a roll mill, a planetary mixer, an open kneader, a continuous kneader, a pressure kneader, or the like.
- the obtained slurry is subjected to dispersion treatment using ceramic beads as a dispersion medium to obtain a coating solution for an electrode layer.
- ceramic beads are used as the dispersion medium for the same reason as described in the preparation of the undercoat layer coating liquid.
- the ceramic beads Jirukonia (Z r 0 2) Peas, alumina (AI 2 0 3) beads, titania (T i 0 2) beads and the like, from the viewpoint of improving the dispersion efficiency specific gravity higher Jirukoniabizu of Use is preferred.
- the particle size of the ceramic beads is preferably about 0.3 to 1.5 mm, more preferably about 0.3 to 0.8 mm, for improving dispersibility.
- the diameter of the beads is as small as 0.3 mm, the effect of improving the dispersibility is not obtained much. If the particle size of the beads is as large as 1.5 mm, dispersion for a long time is required, and workability is likely to deteriorate.
- the residence time of the slurry in the dispersing machine is preferably about 0.1 to 10 minutes, and more preferably 0.15 to 5 minutes. If the residence time is less than 0.1 minute, the dispersing process may be inadequate and the strainer may become clogged. On the other hand, since sufficient dispersion processing is performed with a residence time of 10 minutes, there is no need to make the residence time longer than 10 minutes.
- the residence time is defined by the above equation.
- the bead filling rate defined by the formula (3) is preferably 60 to 85% by weight. If the bead filling ratio is less than 60% by weight, the dispersion treatment tends to be insufficient and the dispersion efficiency tends to decrease. If the bead filling ratio exceeds 85% by weight, bead filling becomes excessive, and the rotating part of the disperser will not easily rotate, load will be high, and heat will be easily generated.
- the prepared coating solution for an electrode layer is applied on the undercoat layer and dried.
- the coating solution for the electrode layer is applied on the undercoat layer by a reverse roll method, a direct opening method, a blade method, a knife method, an extrusion nozzle method, a curtain method, a gravure opening method, and a vacuum coating method. It can be carried out by a generally well-known coating method such as a dip method, a kiss coat method, and a squeeze method.
- a good coating layer surface condition can be obtained by selecting the solvent composition of the coating solution and drying conditions so that the coating is applied at a speed of 5 to 100 m / min while running the current collector. be able to.
- the drying temperature is preferably from 50 to 150 ° C, more preferably from 70 to 140 ° C. If the temperature is lower than 50 ° C, the solvent may not be sufficiently dried. If the temperature exceeds 150 ° C, the evaporation rate of the solvent may be too rapid, and the surface state of the electrode layer may be deteriorated.
- the thickness of the electrode layer is preferably about 50 to 200 m from the viewpoint of reducing the size and weight of the electrode and obtaining a high capacitance.
- the thickness of the electrode layer can also be adjusted by performing a calendar treatment after the electrode layer is dried. The calendering is usually performed using a roll press device.
- the calendar pressure at this time may be, for example, in the range of 490 to 2,500 N / cm (0.5 to 2.5 tZcm).
- Acetylene black (manufactured by Denki Kagaku Kogyo Co., Ltd., trade name: Denka Black, BET specific surface area: And 6 7m 2 / g) 7 0 g, fluororubber (trade name, manufactured by DuPont: V iton- GF) 3 0 and g was added to 1 8 in 6 g of methyl isobutyl heptyl ketone (MI BK), planetary one The mixture was kneaded for 45 minutes using a mixer, and MIBK 964 g was further added to the kneaded material, followed by stirring for 1 hour to obtain a slurry.
- MI BK methyl isobutyl heptyl ketone
- the resulting slurry was charged into a sand grinder mill, di Rukoniabizu as a dispersion medium (Nitsukato Co., Jirukonia Z r 0 2, particle size: 0. 3 mm) using a distributed processing performed at a residence time 2 minutes Was.
- the peripheral speed of the disperser was 1 Om / sec
- the flow rate was 13 g / min (16 Om I Zmin)
- the bead filling rate was 80% by weight.
- a coating solution for the undercoat layer was prepared.
- the undercoat layer coating liquid was kept in a good dispersion state without agglomerates.
- the mixture was kneaded for 45 minutes, and 32 g of MIBK was added to the kneaded material and stirred for 1 hour to obtain a slurry.
- the resulting slurry was introduced into a sand grinder mill, Jirukonia beads as a dispersing medium (Nitsukato Co., Jirukonia Z r 0 2, particle size: 0. 8 mm) using a distributed processing performed at a residence time 1 0 seconds Was.
- the peripheral speed of the disperser was 1 Om / sec
- the flow rate was 124 g / min (120 mIZmin)
- the bead filling rate was 80 wt%.
- a coating solution for an electrode layer was prepared.
- the coating solution for the electrode layer was kept in a good dispersed state without agglomerates.
- the prepared coating solution for an electrode layer was passed through a strainer (size: 60 mesh / inch) provided immediately before supply to the coating process for forming an electrode.
- Supply flow rate of coating liquid 3 4 5 g / m
- the undercoat layer coating solution is uniformly applied on one side of an aluminum foil (thickness: 30 zm) as a current collector by the Clavia roll method, and dried in a drying oven at 100 ° C. To form an undercoat layer having a thickness of 5 zm.
- the coating solution for the electrode layer which has been passed through the strainer, is evenly applied on the undercoat layer by a Claviroll method, and dried in a drying oven at ⁇ 20 ° C. An electrode layer was formed to obtain a raw electrode sheet (electrode sheet).
- the obtained electrode material was calendered at a pressure of 980 N / cm (1 t / cm) by a roll press having a pair of metal press rolls having a diameter of 350 mm.
- an electrode layer having a thickness of 110 m was formed on both surfaces of the current collector to obtain an electrode.
- the obtained electrode was cut into a rectangle (30 mm X 56 mm), and further vacuum-dried at a temperature of 180 ° C for 60 hours to remove moisture adsorbed in the electrode layer and the undercoat layer. The solvent was removed. Thus, an electrode for an electric double layer capacitor was produced.
- two electrodes were prepared for an anode and a cathode.
- An undercoat layer coating solution was prepared in the same manner as in Example 1 except that the dispersion treatment was not performed in the preparation of the undercoat layer coating solution.
- An electrode layer coating solution was prepared in the same manner as in Example 1 except that the dispersion treatment was not performed in the preparation of the electrode layer coating solution.
- the prepared coating solution for an electrode layer was passed through a strainer (size: 60 mesh / inch) provided immediately before being supplied to a coating process for producing an electrode. When the coating liquid was supplied continuously for 14 hours at a coating liquid supply flow rate of 34.5 g / min, the strainer was clogged. I got it. I had to change the strainer twice during the 24 hours.
- An electrode was produced in the same manner as in Example 1.
- leads made of aluminum foil were provided on the outer edge of the surface of the current collector on the side where the formed anode and cathode electrode layers were not formed.
- the anode, the separator, and the force sword were superimposed in a state of being in contact with each other in this order (non-bonded state) to form a laminate (element body).
- Separators made of regenerated cellulose nonwoven fabric 31 mm x 57 mm, thickness: 0.05 mm, manufactured by Nippon Koshi Kogyo Co., Ltd., trade name: TF4500 are used as separators.
- a flexible composite packaging film in which an inner layer made of modified polypropylene, a metal layer made of aluminum foil, and an outer layer made of polyamide were sequentially laminated in this order was used.
- the predetermined rectangular composite packaging film is folded twice at 1/2 of the long side so that the inner layer made of the modified polypropylene is on the inside, and the long sides of the long sides overlapped with each other.
- a heat-sealed bag-like body was opened on the short side.
- the laminate (element body) was accommodated in the bag-like body so that the leads protruded, and then the electrolyte solution was injected under reduced pressure, and the short side edge was sealed under reduced pressure to obtain an electric double layer capacitor. .
- Electrode of Example 1 0/1 0
- the electrode of Comparative Example 1 did not meet the quality standards.
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN2004800364182A CN1890768B (zh) | 2003-12-26 | 2004-12-17 | 电容器用电极的制造方法 |
EP04807802A EP1701365A4 (en) | 2003-12-26 | 2004-12-17 | PROCESS FOR PRODUCING ELECTRODE FOR CAPACITOR |
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JP2003433408A JP2005191425A (ja) | 2003-12-26 | 2003-12-26 | キャパシタ用電極の製造方法 |
JP2003-433408 | 2003-12-26 |
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WO2005064630A1 true WO2005064630A1 (ja) | 2005-07-14 |
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PCT/JP2004/019446 WO2005064630A1 (ja) | 2003-12-26 | 2004-12-17 | キャパシタ用電極の製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050204527A1 (ja) |
EP (1) | EP1701365A4 (ja) |
JP (1) | JP2005191425A (ja) |
CN (1) | CN1890768B (ja) |
WO (1) | WO2005064630A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4466674B2 (ja) * | 2007-03-30 | 2010-05-26 | Tdk株式会社 | 電極及び電気化学デバイス |
JP2009266910A (ja) * | 2008-04-23 | 2009-11-12 | Hitachi Powdered Metals Co Ltd | 電気二重層キャパシターの電極形成用ペースト組成物 |
JPWO2011037124A1 (ja) * | 2009-09-25 | 2013-02-21 | ダイキン工業株式会社 | リチウム二次電池の正極集電積層体 |
KR20110035906A (ko) * | 2009-09-30 | 2011-04-06 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 커패시터 |
FR2977364B1 (fr) * | 2011-07-01 | 2015-02-06 | Hutchinson | Collecteur de courant et procede de fabrication correspondant |
CN104252975A (zh) * | 2014-09-18 | 2014-12-31 | 电子科技大学 | 一种制造扣式超级电容器电极的方法 |
CN109196612A (zh) | 2016-05-20 | 2019-01-11 | 阿维科斯公司 | 在高温下使用的超级电容器 |
CN106298283A (zh) * | 2016-08-24 | 2017-01-04 | 刘爽 | 制造石墨烯基赝电容型超级电容器的方法 |
US11830672B2 (en) | 2016-11-23 | 2023-11-28 | KYOCERA AVX Components Corporation | Ultracapacitor for use in a solder reflow process |
Citations (2)
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JPS63316422A (ja) * | 1987-06-19 | 1988-12-23 | Asahi Glass Co Ltd | 電気二重層コンデンサ |
JP2001093783A (ja) * | 1999-09-22 | 2001-04-06 | Junji Ito | 多孔性電極用バインダー及びこれを用いた多孔性電極 |
Family Cites Families (11)
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DE3444575A1 (de) * | 1984-12-06 | 1986-06-12 | Fryma-Maschinen Ag, Rheinfelden | Kugelmuehle |
JPH0673620B2 (ja) * | 1990-07-03 | 1994-09-21 | 浅田鉄工株式会社 | 分散装置 |
EP0986117B1 (en) * | 1997-05-27 | 2007-08-29 | TDK Corporation | Method for producing electrode for non-aqueous electrolyte battery |
US6195251B1 (en) * | 1997-10-29 | 2001-02-27 | Asahi Glass Company Ltd. | Electrode assembly and electric double layer capacitor having the electrode assembly |
DE69840483D1 (de) * | 1997-11-10 | 2009-03-05 | Nippon Zeon Co | Binder mit vinylalkoholpolymer, dispersion, elektrode und sekundärzelle mit nichtwässrigem elektrolyt |
CA2270771A1 (fr) * | 1999-04-30 | 2000-10-30 | Hydro-Quebec | Nouveaux materiaux d'electrode presentant une conductivite de surface elevee |
JP2001284188A (ja) * | 2000-04-03 | 2001-10-12 | Asahi Glass Co Ltd | 電気二重層キャパシタ電極用炭素材料の製造方法及びこの炭素材料を用いた電気二重層キャパシタの製造方法 |
US6627252B1 (en) * | 2000-05-12 | 2003-09-30 | Maxwell Electronic Components, Inc. | Electrochemical double layer capacitor having carbon powder electrodes |
KR100473433B1 (ko) * | 2000-07-17 | 2005-03-08 | 마쯔시다덴기산교 가부시키가이샤 | 비수전해액 및 그것을 포함하는 비수전해액전지 및 전해콘덴서 |
JP4820031B2 (ja) * | 2001-08-31 | 2011-11-24 | 株式会社荒木鉄工 | 分散装置 |
JP2003297701A (ja) * | 2002-03-29 | 2003-10-17 | Tdk Corp | 電気化学デバイスおよび電気化学デバイスの製造方法 |
-
2003
- 2003-12-26 JP JP2003433408A patent/JP2005191425A/ja active Pending
-
2004
- 2004-12-17 EP EP04807802A patent/EP1701365A4/en not_active Withdrawn
- 2004-12-17 CN CN2004800364182A patent/CN1890768B/zh not_active Expired - Fee Related
- 2004-12-17 WO PCT/JP2004/019446 patent/WO2005064630A1/ja not_active Application Discontinuation
- 2004-12-21 US US11/016,985 patent/US20050204527A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63316422A (ja) * | 1987-06-19 | 1988-12-23 | Asahi Glass Co Ltd | 電気二重層コンデンサ |
JP2001093783A (ja) * | 1999-09-22 | 2001-04-06 | Junji Ito | 多孔性電極用バインダー及びこれを用いた多孔性電極 |
Non-Patent Citations (1)
Title |
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See also references of EP1701365A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP2005191425A (ja) | 2005-07-14 |
EP1701365A1 (en) | 2006-09-13 |
EP1701365A4 (en) | 2009-12-23 |
CN1890768A (zh) | 2007-01-03 |
US20050204527A1 (en) | 2005-09-22 |
CN1890768B (zh) | 2011-02-02 |
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