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WO2025216133A1 - Condensateur électrochimique - Google Patents

Condensateur électrochimique

Info

Publication number
WO2025216133A1
WO2025216133A1 PCT/JP2025/013405 JP2025013405W WO2025216133A1 WO 2025216133 A1 WO2025216133 A1 WO 2025216133A1 JP 2025013405 W JP2025013405 W JP 2025013405W WO 2025216133 A1 WO2025216133 A1 WO 2025216133A1
Authority
WO
WIPO (PCT)
Prior art keywords
activated carbon
capacitor
surface area
specific surface
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/013405
Other languages
English (en)
Japanese (ja)
Inventor
充裕 藤田
信敬 武田
純子 小野崎
奈穂 福島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2025216133A1 publication Critical patent/WO2025216133A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
    • H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
    • 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

  • This disclosure relates to electrochemical capacitors.
  • Electrochemical capacitors have the advantage of being long-lasting and capable of rapid charging.
  • Various proposals have been made for electrochemical capacitors.
  • Patent Document 1 JP 2008-60457 A discloses "an electric double layer capacitor comprising a polarizable electrode layer containing activated carbon, a conductive auxiliary material, and a binder, wherein the external specific surface area of the activated carbon (specific surface area excluding micropores with a pore diameter of less than 20 ⁇ calculated from a nitrogen adsorption isotherm by the t-plot method) is within the range of 450 to 800 m 2 /cm 3 per unit volume of the polarizable electrode layer, and the volume based on interparticle voids per unit volume of the polarizable electrode layer is within the range of 0.05 to 0.12 cm 3 /cm 3. "
  • Claim 1 of Patent Document 2 JP 2021-170568 A discloses a carbonaceous material having a BET specific surface area of 2000 m 2 /g or more and 3500 m 2 /g or less, and an external specific surface area ratio, which is the ratio of the external specific surface area to the total specific surface area obtained by t-plot analysis, where the specific surface area of the particle surface is defined as the external specific surface area and the specific surface area of the pores inside the particle is defined as the internal specific surface area, is 4.8% or more and 14.5% or less.
  • the electrochemical capacitor includes a polarizable electrode layer.
  • the polarizable electrode layer includes activated carbon, and the activated carbon has a BET specific surface area Sb of less than 2000 m 2 /g.
  • the ratio Sa/Sb of the external specific surface area Sa of the activated carbon determined by a t-plot method to the BET specific surface area Sb is 0.10 or greater.
  • This disclosure makes it possible to obtain an electrochemical capacitor with minimal degradation.
  • FIG. 1 is a perspective view schematically illustrating an example of an electrochemical capacitor according to a first embodiment.
  • electrochemical capacitor An example of the electrochemical capacitor according to this embodiment will be described below.
  • the electrochemical capacitor according to this embodiment may be referred to as an “electrochemical capacitor (C)” or a “capacitor (C).”
  • the electrochemical capacitor (C) includes a polarizable electrode layer.
  • the polarizable electrode layer includes activated carbon.
  • the activated carbon has a BET specific surface area Sb of less than 2000 m 2 /g.
  • the ratio Sa/Sb of the external specific surface area Sa of the activated carbon determined by the t-plot method to the BET specific surface area Sb is 0.10 or more.
  • the capacitor (C) includes a first electrode and a second electrode. At least one of the first electrode and the second electrode includes the polarizable electrode layer described above. Typically, both the first electrode and the second electrode include the polarizable electrode described above.
  • the BET specific surface area Sb of the activated carbon is less than 2000 m 2 /g, and may be 1800 m 2 /g or less, 1700 m 2 /g or less, 1600 m 2 / g or less, 1500 m 2 /g or less, or 1150 m 2 /g or less.
  • the BET specific surface area Sb may be 900 m 2 /g or more, 1000 m 2 /g or more, 1150 m 2 /g or more, or 1500 m 2 /g or more.
  • the BET specific surface area Sb may be in the range of 1000 to 1700 m 2 /g.
  • the external specific surface area Sa of the activated carbon may be 170 m 2 /g or more, 180 m 2 /g or more, 200 m 2 /g or more, 240 m 2 / g or more, 280 m 2 /g or more, or 420 m 2 /g or more.
  • the external specific surface area Sa may be 1000 m 2 /g or less, 730 m 2 /g or less, 400 m 2 /g or less, 250 m 2 /g or less, or 200 m 2 /g or less.
  • the external specific surface area Sa may be in the range of 170 to 1000 m 2 /g. The lower and upper limits of this range may be changed as long as the lower limit is not greater than or equal to the upper limit.
  • the external specific surface area Sa of the activated carbon may be in the range of 180 to 1000 m 2 /g (e.g., 280 to 1000 m 2 /g).
  • a predetermined value e.g., 180 m 2 /g, 280 m 2 /g, etc.
  • a predetermined value or less e.g. 400 m 2 /g or less
  • the ratio Sa/Sb is 0.10 or greater, and may be 0.15 or greater, or 0.29 or greater.
  • the ratio Sa/Sb may be 0.70 or less, 0.65 or less, 0.36 or less, or 0.16 or less.
  • the average pore diameter of the activated carbon may be 2.0 nm or more, 2.5 nm or more, 3.0 nm or more, or 3.2 nm or more.
  • the average pore diameter of the activated carbon may be 4.0 nm or less.
  • the capacitor (C) satisfies the following condition (1):
  • the capacitor (C) may further satisfy the conditions (2) and/or (3).
  • the BET specific surface area Sb of the activated carbon is less than 2000 m 2 /g, and the ratio Sa/Sb of the external specific surface area Sa determined by the t-plot method to the BET specific surface area Sb is 0.10 or more.
  • the external specific surface area Sa of the activated carbon is in the range of 180 to 1000 m 2 /g.
  • the activated carbon has an average pore diameter of 3.0 nm or more.
  • the numerical ranges set forth in conditions (1) to (3) may be replaced with other numerical ranges as described above.
  • the evaluation value for activated carbon in one polarizable electrode layer can be considered to be the value obtained when all activated carbons contained in that polarizable electrode layer are evaluated together.
  • BET specific surface area Sb of activated carbon is measured using the adsorption isotherm of nitrogen gas.
  • the external specific surface area Sa of activated carbon is determined by the t-plot method based on the nitrogen gas adsorption isotherm.
  • the external specific surface area is the specific surface area calculated using the t-plot method based on the nitrogen adsorption isotherm, and refers to the specific surface area excluding micropores with a pore diameter of less than 20 ⁇ .
  • Analysis using the t-plot method is performed by comparing and converting the adsorption isotherm data with a standard isotherm and graphing the relationship between the adsorption layer thickness t and the adsorption amount. The t-plot method is used to analyze micropores.
  • the average pore diameter of activated carbon can be calculated using the BET specific surface area Sb and the total pore volume V according to the following formula:
  • the BET specific surface area Sb, the external specific surface area Sa, and the total pore volume V can be measured using, for example, a Tristar II Plus 3020 manufactured by Shimadzu Corporation.
  • Activated carbon having the above physical properties may be prepared by mixing commercially available activated carbons having the desired physical properties. Alternatively, activated carbon may be produced by heat treating a raw material to convert it into a carbonized product, and then activating the carbonized product to make it porous. Examples of raw materials include wood, coconut shells, pulp waste liquor, coal-based pitch, petroleum-based pitch, phenolic resin, petroleum coke, and coal coke.
  • the activation treatment may be gas activation using a gas (such as water vapor).
  • the activation treatment may be chemical activation using zinc chloride (ZnCl 2 ), an acid (such as phosphoric acid), or an alkali (such as potassium hydroxide).
  • the activated carbon obtained by the activation treatment may be pulverized. After the pulverization treatment, classification may be performed.
  • the pulverization treatment may be performed using a ball mill, a jet mill, or the like.
  • the activated carbon after the pulverization treatment may be heat-treated at high temperature to remove functional groups on the surface of the activated carbon.
  • the pore structure can be controlled by the starting material and/or activation method.
  • Activating wood with chemicals (zinc chloride, phosphoric acid, etc.) makes it easier to form mesopores with diameters of 2 to 50 nm, making it possible to increase the external specific surface area Sa.
  • activating coconut shell with gas (water vapor, carbon dioxide, etc.) makes it possible to increase the BET specific surface area Sb. Therefore, to obtain activated carbon that satisfies the above condition (1), it is preferable to use activated carbon activated with zinc chloride or phosphoric acid.
  • the components other than those essential to the capacitor (C) are not particularly limited, and components used in known electrochemical capacitors may be applied. Examples of the components of the capacitor (C) are described below. However, the capacitor (C) is not limited to the examples described below.
  • the capacitor (C) typically includes a first electrode, a second electrode, a separator, and an electrolyte. These are housed in an outer casing. Optionally, the capacitor (C) may also include other components (lead wires, etc.).
  • the first electrode and the second electrode are a pair of electrodes.
  • the first electrode and the second electrode face each other with a separator interposed therebetween.
  • the first electrode and the second electrode may be a positive electrode and a negative electrode, respectively.
  • the configuration of the first electrode and the configuration of the second electrode may be the same or different.
  • the first and second electrodes are polarizable electrodes.
  • Polarizable electrodes contain an active material that can adsorb and desorb ions. Capacitance is generated when ions are adsorbed onto the active material. A non-Faradic current flows when ions are desorbed from the active material.
  • the electrochemical capacitor (C) is an electric double layer capacitor (EDLC) in which an electric double layer is formed when ions are adsorbed onto the active material.
  • EDLC electric double layer capacitor
  • the polarizable electrode includes a polarizable electrode layer.
  • the polarizable electrode may include a current collector and a polarizable electrode layer disposed on the current collector.
  • the positive electrode may include a positive electrode current collector and a polarizable electrode layer disposed on the positive electrode current collector.
  • the negative electrode may include a negative electrode current collector and a polarizable electrode layer disposed on the negative electrode current collector.
  • the polarizable electrode layer of capacitor (C) contains the above-mentioned activated carbon as an active material.
  • the proportion of activated carbon in the active material in the polarizable electrode layer may be 80% by mass or more, 90% by mass or more, or 95% by mass or more.
  • Activated carbon alone may be used as the active material in the polarizable electrode layer of capacitor (C).
  • the polarizable electrode layer may contain other components (binder, conductive material, etc.) as necessary.
  • binders include polymers such as polytetrafluoroethylene (PTFE), carboxymethyl cellulose (CMC), and styrene-butadiene rubber (SBR).
  • conductive materials include carbon black (acetylene black, ketjen black, etc.).
  • a conductive sheet can be used as the current collector, and metal foil (e.g., aluminum foil) can also be used.
  • metal foil e.g., aluminum foil
  • metal foil such as aluminum foil is used.
  • the surface of the current collector may be roughened by etching or other methods.
  • the method for forming the electrode is not particularly limited.
  • the electrode may be formed by the following method. First, a slurry is prepared by mixing activated carbon, a binder and/or conductive material, and a dispersion medium. Next, the slurry is applied to the surface of a current collector and dried to form a laminate of the current collector and the coating film (polarizable electrode layer). Next, the laminate is rolled as necessary. In this way, an electrode is obtained that includes a current collector and a polarizable electrode layer disposed on the current collector.
  • the electrolyte solution includes a solvent (non-aqueous solvent), an ionic substance, and a buffer.
  • the ionic substance includes a cation and an anion.
  • the electrolyte solution can be prepared by dissolving the ionic substance in a solvent.
  • the concentration of the ionic substance in the electrolyte solution may be 0.5 mol/L or more and may be 2.0 mol/L or more.
  • the cations contained in the electrolyte solution may be one type or more than one type.
  • the anions contained in the electrolyte solution may be one type or more than one type.
  • solvents include lactone compounds and compounds other than lactone compounds.
  • the solvent may consist of only one type of compound, or it may be a mixture of two types of compounds.
  • lactone compounds include gamma-butyrolactone, gamma-valerolactone, and gamma-caprolactone.
  • solvents other than lactone compounds include cyclic carbonates such as ethylene carbonate, propylene carbonate, and butylene carbonate; chain carbonates such as dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate; polyhydric alcohols such as ethylene glycol and propylene glycol; cyclic sulfones such as sulfolane; amides such as N-methylacetamide, N,N-dimethylformamide, and N-methyl-2-pyrrolidone; ethers such as 1,4-dioxane; ketones such as methyl ethyl ketone; and formaldehyde.
  • cyclic carbonates such as ethylene carbonate, propylene carbonate, and butylene carbonate
  • chain carbonates such as dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate
  • polyhydric alcohols such as ethylene glycol and propylene glycol
  • cyclic sulfones such
  • acetonitrile-based solvent By using an acetonitrile-based solvent, it is possible to suppress deterioration when a high voltage is applied. However, acetonitrile-based solvents can be flammable. With Capacitor (C), it is possible to suppress deterioration when a high voltage is applied, even without using an acetonitrile-based solvent.
  • a quaternary alkylammonium ion represented by NR 4 + (R is an alkyl group) is preferred because of its high voltage resistance and high solubility in aprotic solvents.
  • the four alkyl groups R bonded to N may be the same or different.
  • Each of the four alkyl groups R may independently be an alkyl group having 1 to 4 carbon atoms.
  • Each of the alkyl groups R may be a linear alkyl group.
  • Examples of cations include tetramethylammonium ion, tetraethylammonium ion, diethyldimethylammonium ion, ethyltrimethylammonium ion, and triethylmethylammonium ion.
  • the diethyldimethylammonium ion (N(C 2 H 5 ) 2 (CH 3 ) 2 + ) is preferred because it easily reacts with OH ⁇ generated by the decomposition of trace amounts of water and makes it easy to maintain a constant pH of the electrolyte.
  • anions constituting the ionic substance examples include BF 4 ⁇ , PF 6 ⁇ , AsF 6 ⁇ , SbF 6 ⁇ , N(FSO 2 ) 2 ⁇ (FSI), N(F 3 C SO 2 ) 2 ⁇ (TFSI), etc.
  • Fluorine-containing anions such as BF 4 ⁇ and PF 6 ⁇ are preferred in terms of improving withstand voltage characteristics.
  • the organic salt may be composed of a quaternary alkylammonium cation and a fluorine-containing acid anion.
  • organic salts include diethyldimethylammonium tetrafluoroborate (DEDMABF 4 ), triethylmethylammonium tetrafluoroborate (TEMABF 4 ), etc.
  • a separator is usually disposed between the positive electrode and the negative electrode.
  • the separator has ion permeability and insulating properties.
  • the separator prevents short-circuiting between the first electrode and the second electrode.
  • the separator may be a woven fabric, a nonwoven fabric, or a microporous membrane.
  • separator materials include polymers and glass.
  • polymers include polyolefins (such as polyethylene) and cellulose.
  • separators include nonwoven fabrics made of cellulose fibers, nonwoven fabrics made of glass fibers, and microporous membranes made of polyolefins.
  • the thickness of the separator may be in the range of 8 to 300 ⁇ m (e.g., 8 to 40 ⁇ m).
  • a capacitor element is formed by a positive electrode, a negative electrode, and a separator.
  • a wound capacitor element is formed by winding a positive electrode, a negative electrode, and a separator so that the separator is disposed between the positive electrode and the negative electrode.
  • the electrochemical capacitor (C) includes an exterior body that houses a capacitor element and an electrolyte.
  • the exterior body is not particularly limited, and a known exterior body may be used.
  • the exterior body may include an exterior case and a sealing member that seals the opening of the exterior case.
  • the exterior case may be formed of a metal such as aluminum, stainless steel, copper, iron, or brass.
  • the sealing member may be formed of an elastic material such as rubber (butyl rubber).
  • the capacitor (C) may include other members (such as lead wires) as necessary.
  • the shape of the capacitor (C) is not particularly limited.
  • the capacitor (C) may be a cylindrical capacitor including a wound capacitor element.
  • the capacitor (C) may be a rectangular capacitor including a stacked capacitor element.
  • the capacitor (C) may be a coin-shaped capacitor.
  • the method for producing the capacitor (C) is not particularly limited, except that the polarizable electrode layer is formed using the activated carbon described above.
  • the capacitor (C) may be produced by a known method, except that the polarizable electrode layer is formed using the activated carbon described above.
  • FIG. 1 is a perspective view of the electrochemical capacitor 10 with a portion cut away.
  • Electrochemical capacitor 10 is an electric double layer capacitor. Electrochemical capacitor 10 includes a wound capacitor element 1. Capacitor element 1 is formed by winding a first electrode (positive electrode) 2 and a second electrode (negative electrode) 3 with a separator 4 interposed therebetween. The first electrode 2, second electrode 3, and separator 4 are each strip-shaped. The first electrode 2 and second electrode 3 each include a current collector and polarizable electrode layers disposed on both sides of the current collector. The polarizable electrode layers include the activated carbon described above.
  • a lead wire 5a is connected to the first electrode 2.
  • a lead wire 5b is connected to the second electrode 3.
  • the capacitor element 1 is housed in a cylindrical outer case 6 with a bottom, together with an electrolyte (not shown).
  • the opening of the outer case 6 is sealed with a sealing member 7.
  • the lead wires 5a and 5b pass through the sealing member 7.
  • An electrochemical capacitor including a polarizable electrode layer, the polarizable electrode layer includes activated carbon;
  • the BET specific surface area Sb of the activated carbon is less than 2000 m 2 /g;
  • an electrochemical capacitor, wherein a ratio Sa/Sb of the external specific surface area Sa of the activated carbon determined by a t-plot method to the BET specific surface area Sb is 0.10 or more;
  • electrochemical capacitor according to the present disclosure will be described in more detail below using examples.
  • the present disclosure is not limited to the following examples. In these examples, multiple electrochemical capacitors were fabricated and evaluated.
  • Capacitor A1 (electric double layer capacitor) was fabricated by the following procedure.
  • Activated carbon having the physical properties shown in Table 1 was prepared as an active material.
  • the activated carbon was produced by the method described above.
  • the BET specific surface area Sb, external specific surface area Sa, and average pore diameter of the activated carbon were measured by the methods described above. Specifically, the measurements were performed using a Tristar II Plus 3020 manufactured by Shimadzu Corporation.
  • the resulting laminate was rolled to obtain an electrode sheet comprising a current collector and polarizable electrode layers (thickness: 70 ⁇ m) on both sides of the current collector.
  • the electrode sheet was cut to a predetermined size to obtain positive and negative electrodes.
  • Aluminum leads were connected to each electrode.
  • Capacitor Element The positive electrode and negative electrode were wound with a separator interposed therebetween to form a capacitor element.
  • the separator was a cellulose nonwoven fabric.
  • the formed capacitor element was dried by heating.
  • An electrolytic solution was prepared by dissolving an organic salt (diethyldimethylammonium tetrafluoroborate: DEDMA + BF 4 ⁇ ) in ⁇ -butyrolactone (GBL).
  • the concentration of the organic salt in the electrolytic solution was 1 mol/L.
  • Capacitor A1 electrochemical capacitor
  • Capacitor A1 was charged at a constant current of 2700 mA in a ⁇ 30° C. environment until the voltage reached 2.7 V. Next, the state in which a voltage of 2.7 V was applied to capacitor A1 was maintained for 7.5 minutes. After that, capacitor A1 was discharged at a constant current of 1350 mA in a ⁇ 30° C. environment. The discharge voltage during discharge was measured to obtain a discharge curve (vertical axis: discharge voltage, horizontal axis: discharge time).
  • the voltage V S at the intercept of a linear approximation line in the range of 0.05 to 0.2 seconds after the start of discharge of the discharge curve was determined.
  • ⁇ V was calculated as the value (V 0 -V S ) obtained by subtracting the voltage V S from the voltage V 0 at the start of discharge (0 seconds after the start of discharge).
  • the initial internal resistance R1 of capacitor A1 was calculated using the following formula:
  • capacitor A1 a test was conducted in the same manner as above, except that the voltage applied during the float test was changed to 2.9 V. This allowed the resistance change ratio when a high voltage was applied to be determined.
  • Capacitors A2 to A7 and C1 Capacitors A2 to A7 and C1 were fabricated using the same method and conditions as capacitor A1, except that the activated carbon (active material) was changed. The activated carbon was fabricated using the method described above. The characteristics (resistance change ratio) of the fabricated capacitors were evaluated using the same method as capacitor A1.
  • Capacitors A1 to A7 are examples of electrochemical capacitors (C).
  • Capacitor C1 is a comparative example. As shown in Table 1, capacitors A1 to A7 exhibited small resistance changes and good characteristics. Capacitors A5 to A7 also exhibited small resistance changes in a float test in which a high voltage was applied.
  • This disclosure can be used in electrochemical capacitors.
  • Capacitor element 2 First electrode 3: Second electrode 4: Separator 6: Outer case 7: Sealing member 10: Electrochemical capacitor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

Ce condensateur électrochimique comprend une couche d'électrode polarisable. La couche d'électrode polarisable contient du charbon actif. La surface spécifique BET Sb du charbon actif est inférieure à 2 000 m2/g. Le rapport Sa/Sb de la surface spécifique externe Sa du charbon actif obtenue par la méthode t-plot à la surface spécifique BET Sb du charbon actif est supérieur ou égal à 0,10.
PCT/JP2025/013405 2024-04-10 2025-04-01 Condensateur électrochimique Pending WO2025216133A1 (fr)

Applications Claiming Priority (2)

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JP2024063498 2024-04-10
JP2024-063498 2024-04-10

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008060457A (ja) * 2006-09-01 2008-03-13 Japan Gore Tex Inc 電気二重層キャパシタ
JP2009179485A (ja) * 2006-04-10 2009-08-13 Ipb:Kk 活性炭及びその製造方法、並びに製造装置
JP2017091639A (ja) * 2015-11-04 2017-05-25 新日鐵住金株式会社 固体高分子形燃料電池用の触媒粉末及びその製造方法、並びにこの触媒粉末を用いた固体高分子形燃料電池
JP2021170568A (ja) * 2020-04-14 2021-10-28 株式会社村田製作所 炭素質材料および電気二重層コンデンサ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009179485A (ja) * 2006-04-10 2009-08-13 Ipb:Kk 活性炭及びその製造方法、並びに製造装置
JP2008060457A (ja) * 2006-09-01 2008-03-13 Japan Gore Tex Inc 電気二重層キャパシタ
JP2017091639A (ja) * 2015-11-04 2017-05-25 新日鐵住金株式会社 固体高分子形燃料電池用の触媒粉末及びその製造方法、並びにこの触媒粉末を用いた固体高分子形燃料電池
JP2021170568A (ja) * 2020-04-14 2021-10-28 株式会社村田製作所 炭素質材料および電気二重層コンデンサ

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