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1052 results about "Electric double-layer capacitor" patented technology
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Electrical double-layer capacitors are, together with pseudocapacitors, part of a new type of electrochemical capacitors called supercapacitors, also known as ultracapacitors. Supercapacitors do not have a conventional solid dielectric. The capacitance value of an electrochemical capacitor is determined by two storage principles: Double-layer capacitance – electrostatic storage of the electrical energy achieved by separation of charge in a Helmholtz double layer at the interface between the surface of a conductor electrode and an electrolytic solution electrolyte. The separation of charge distance in a double-layer is on the order of a few Ångströms and is static in origin. Pseudocapacitance – Electrochemical storage of the electrical energy, achieved by redox reactions electrosorption or intercalation on the surface of the electrode by specifically adsorbed ions that results in a reversible faradaic charge-transfer on the electrode. Double-layer capacitance and pseudocapacitance both contribute to the total capacitance value of a supercapacitor. However, the ratio of the two can vary greatly, depending on the design of the electrodes and the composition of the electrolyte.
Supercapacitor having electrode material comprising single-wall carbon nanotubes and process for making the same
InactiveUS7061749B2Avoid shortingHybrid capacitor electrolytesHybrid capacitor electrodesSupercapacitorNanotube
The present invention relates to a supercapacitor, also known as an electrical double-layer capacitor or ultracapacitor, having electrode material comprising single-wall carbon nanotubes. The carbon nanotubes can be derivatized with functional groups. The electrode material is made by preparing a polymer-nanotube suspension comprising polymer and nanotubes, forming the polymer-nanotube suspension into a polymer-nanotube composite of the desired form, carbonizing the polymer-nanotube composite to form a carbonaceous polymer-nanotube material, and activating the material. The supercapacitor includes electrode material comprising activated carbonaceous polymer-nanotube material in contact with current collectors and permeated with an electrolyte, which may be either fluid or solid. In the case of a fluid or compressible electrolyte, an electrolyte-permeable separator or spacer is interposed between the electrodes to keep the electrodes from shorting. The supercapacitor made with electrodes comprising underivatized single-wall carbon nanotubes and polymer that has been carbonized and activated appears to operate as a non-Faradaic supercapacitor.
Owner:GEORGIA TECH RES CORP
Position input device and computer system
InactiveUS20070146351A1Readily being affected by external noiseReduce power consumptionInput/output processes for data processingElectric power transmissionComputerized system
A position input device is provided in which signals are transmitted from a position indicator, and signals transmitted from the position indicator are received by a position detector device. According to certain embodiments, an electrical double-layer capacitor, a charging circuit which charges the electrical double-layer capacitor, and a power transmission unit which relays and supplies to the charging circuit power supplied from a power supply unit external to the position indicator, are provided in the position indicator. In other embodiments the position input device has a built-in power supply unit, transmitting units, and a control unit for switching the transmitting units between energized and de-energized states. Also provided are position input systems and computer systems including the position input device, and methods of operating the position input device and the systems.
Owner:WACOM CO LTD
Supercapacitor having electrode material comprising single-wall carbon nanotubes and process for making the same
InactiveUS20060098389A1Avoid shortingHybrid capacitor electrolytesHybrid capacitor electrodesSupercapacitorNanotube
The present invention relates to a supercapacitor, also known as an electrical double-layer capacitor or ultracapacitor, having electrode material comprising single-wall carbon nanotubes. The carbon nanotubes can be derivatized with functional groups. The electrode material is made by preparing a polymer-nanotube suspension comprising polymer and nanotubes, forming the polymer-nanotube suspension into a polymer-nanotube composite of the desired form, carbonizing the polymer-nanotube composite to form a carbonaceous polymer-nanotube material, and activating the material. The supercapacitor includes electrode material comprising activated carbonaceous polymer-nanotube material in contact with current collectors and permeated with an electrolyte, which may be either fluid or solid. In the case of a fluid or compressible electrolyte, an electrolyte-permeable separator or spacer is interposed between the electrodes to keep the electrodes from shorting. The supercapacitor made with electrodes comprising underivatized single-wall carbon nanotubes and polymer that has been carbonized and activated appears to operate as a non-Faradaic supercapacitor.
Owner:GEORGIA TECH RES CORP
Aqueous polyvinylidene fluoride composition
ActiveUS20100304270A1Dry fastUseful electrodeLiquid electrolytic capacitorsConductive materialInterconnectivityPolyvinylidene difluoride
The invention relates to an aqueous fluoropolymer, and preferably polyvinylidene fluoride (PVDF), composition for manufacturing electrodes for use in non-aqueous-type electrochemical devices, such as batteries and electric double layer capacitors. The composition contains aqueous PVDF binder, and one or more powdery electrode-forming materials. In one embodiment, the composition is free of fluorinated surfactant In another embodiment, one or more fugitive adhesion promoters are added. The electrode formed from the composition of the invention exhibits interconnectivity and irreversibility that is achieved from the use of aqueous PVDF binder.
Owner:ARKEMA INC
Electronic component separator and method for producing the same
InactiveUS20050208383A1Improve reliabilityImprove machinabilityHybrid capacitor separatorsCell seperators/membranes/diaphragms/spacersLithiumElectronic component
The present invention provides a separator that, when used in a lithium ion secondary battery, polymer lithium secondary battery, aluminum electrolytic capacitor or electric double-layer capacitor, offers desired levels of various practical characteristics, undergoes minimal heat shrinkage even when overheated, and exhibits high reliability and excellent workability. The electronic component separator proposed by the present invention comprises a porous base made of a substance having a melting point of 180° C. or above, and a resin structure provided on at least one side of and / or inside the porous base, and the porous base and / or resin structure contains filler grains.
Owner:TOMOEGAWA PAPER CO LTD
Polarizable electrode for electric double layer capacitor and methods for producing polarizable electrode and capacitor
InactiveUS6847517B2Reduced Diffusion ResistanceEasy to disassembleProtecting/adjusting hybrid/EDL capacitorLiquid electrolytic capacitorsActivated carbonMaterials science
A polarizable electrode for an electric double layer capacitor includes an activated carbon powder, and a binder material mixed with the activated carbon. The amount of water contained in the polarizable electrode is 1500 ppm or less with respect to the weight of the polarizable electrode.
Owner:ASAHI GLASS CO LTD
Activated carbon, method for production thereof, polarizing electrode and electrical double layer capacitor
InactiveUS20050266990A1Good effectEasily graphitizableMaterial nanotechnologyCarbon compoundsBiological activationDendrite
In activated carbon obtained by subjecting a carbonaceous material to an activation treatment, the overall content of alkali metals is set at 100 ppm or less, or the overall content of heavy metals is set at 20 ppm or less and the overall content of alkali metals is set at 200 ppm or less. In cases where such activated carbon is used as a raw material in electronic devices, the formation of dendrites by the reductive deposition of alkali metals or heavy metals tends not to occur, so that problems such as short-circuiting or the like tend not to arise, and a good rate of self-discharge retention is shown.
Owner:HONDA MOTOR CO LTD +1
Carbon material for electric double layer capacitor, method of producing same, electric double layer capacitor and method of fabricating same
There is disclosed a carbon material from which an electric double layer capacitor (EDLC) having a large capacitance can be fabricated. First, a carbon material is activated to produce crystallites of graphite-like carbon having interlayer distances of 0.365 to 0.385 nm. Positive and negative plates are fabricated using the crystallites.
Owner:ADVANCED CAPACITOR TECH +1
Multi-element composite nano-material, preparation method thereof and application thereof
ActiveCN103117175AComponents are easy to controlImprove stabilityHybrid capacitor electrodesHybrid/EDL manufactureCapacitanceHigh energy
The invention provides a multi-element composite nano-material for a super capacitor, and a preparation method of the nano-material. The nano-material comprises a carbon material, metal oxide and conducting polymer, and components of the nano-material can be two or more than two materials. By the aid of the characteristics such as fine electrical conductivity, long cycle life and high specific surface area of the carbon material, high pseudo-capacitance of the metal oxide and low internal resistance, low cost and high operating voltage of the conducting polymer, different types of electrode materials generate synergistic effects, advantages are mutually combined, shortcomings are mutually weakened, the energy storage characteristics of an electric double-layer capacitor and a pseudo-capacitor are simultaneously made full use of, a composite electrode material with high power density, fine circulating stability and higher energy density is prepared, and the multi-element composite nano-material is excellent in comprehensive performance when used for an electrode of the super capacitor, has the advantages of simple preparation process, short cycle, low cost and the like, and is suitable for large-scale industrial production.
Owner:中科(马鞍山)新材料科创园有限公司
Distributed networks of electric double layer capacitor supervisory controllers and networks thereof
InactiveUS20070001651A1Eliminating redundant enclosureEliminating terminal sealCircuit monitoring/indicationCharge equalisation circuitTelecommunicationsElectric double-layer capacitor
Disclosed is an electric double layer capacitor, having a multiplicity of cells occupying a single package, wherein the individual cells are managed and balanced by networkable embedded circuitry also contained within the same package.
Owner:HARVEY TROY AARON
Electric double layer capacitor
InactiveUS6466429B1Lower internal resistanceInhibit sheddingHybrid capacitor electrolytesHybrid capacitor electrodesActivated carbonLead dioxide
The present invention is directed to a novel capacitor. The capacitor may be used in electric double layer capacitors. The capacitors include a polarizable electrode including activated carbon and a non-polarizable electrode including lead dioxide and lead sulfate. The capacitors of the present invention provide considerably higher electric capacity, higher durability, and low resistance, while maintaining high conductivity. Additionally, the electrodes may be produced more quickly and inexpensively.
Owner:WAINWRIGHT D WALKER
Porous carbonaceous material, manufacturing method therefor and use thereof
InactiveUS6475461B1Facilitate dissociationImprove adsorption strengthPigmenting treatmentPhysical/chemical process catalystsElectrochemistryOxygen
A halogen treatment is conducted comprising: a halogenation step wherein a halogenation heat treatment for preparing a halogenated carbonized charcoal is conducted in which the carbonized charcoal is brought into contact with halogen; and a dehalogenation step wherein a dehalogenation treatment is conducted in which a part of or all halogen atoms in the halogenated carbonized charcoal are eliminated. A porous carbonaceous material is obtained at a high yield, and the amounts of nitrogen, oxygen, carbon dioxide, and methane adsorbed by this porous carbonaceous material are large. When this porous carbonaceous material is used as an electrical double layer capacitor carbon, the electrostatic capacity is increased compared to conventional carbonaceous materials. Consequently, a carbonaceous material is obtained which has micopores and / or sub-micropores which are suitable for the adsorption of small molecules such as nitrogen, and for storage of electrochemical energy.
Owner:NIPPON SANSO CORP
Capacitor
InactiveUS20080297981A1Improve charging capacityIncrease chanceProtecting/adjusting hybrid/EDL capacitorHybrid capacitor electrodesLithiumActivated carbon
The present invention is characterized by obtaining a high charge / discharge capacity upon high rate charging / discharging in a hybrid capacitor having characteristics of both an electric double layer capacitor and a lithium-ion secondary battery. Specifically, the present invention is a capacitor comprising: a positive electrode 1 composed of a polarizable electrode containing activated carbon; a negative electrode 2 containing as an anode active material a carbon material capable of inserting / extracting lithium ion; and a nonaqueous electrolyte containing lithium ion, wherein a charge cutoff potential for the negative electrode 2 is within the range of 0.15 to 0.25 V (vs. Li / Li+).
Owner:SANYO ELECTRIC CO LTD
Electric double layer capacitor enclosed in polymer housing
InactiveUS20050231893A1High packaged volumetric energy densityCheap constructionHybrid capacitor electrodesDouble layer capacitorsConductive polymerEngineering
The present invention relates to an electric double layer capacitor comprised of carbonaceous electrodes enclosed in polymer housing, using conductive polymer current collectors intrinsically bonded to both the electrodes and the enclosure, and a method for constructing the same. The present invention also relates to bipolar stacks of electric double layer capacitor cells and a method for producing the same.
Owner:HARVEY TROY A
Activated carbon for use in electric double layer capacitor and method of producing the same
InactiveUS6592838B1Hybrid capacitor electrodesDouble layer capacitorsActivated carbonPhysical chemistry
Activated carbon for use in an electric double layer capacitor which has at least activated carbon, electrolyte solution and a separator, the activated carbon having properties of: the total specific surface area of 1000 m2 / g or larger; the pore volume distribution of 400 mul / g or larger for the pores larger than 12 Å and smaller than 40 Å in diameter and of 50 mul / g or larger for the pores larger than 40 Å in diameter; and the total pore volume of 1000 mul / g or smaller.
Owner:PANASONIC CORP
Activated carbon for use in electric double layer capacitors
InactiveUS20060240979A1Solve the small densityIncreased durabilityCarbon compoundsHybrid capacitor electrodesActivated carbonEngineering
Activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and which capacitors, even when charge-and-discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density. That is, the present invention relates to the activated carbon manufactured by carbonization of coconut shell, which has a BET specific surface area of 2000 m2 / g to 2500 m2 / g, an average pore diameter of 1.95 nm (19.5 Å) to 2.20 nm (22 Å) and a pore volume of pores having a pore diameter calculated according to a Cranston-Inkley method of 5.0 nm (50 Å) to 30.0 nm (300 Å), of 0.05 cm3 / g to 0.15 cm3 / g.
Owner:MITSUBISHI CHEM CORP
Electric double layer capacitor and process for its production
InactiveUS6906911B2Increase capacitance densityMaintained satisfactorilyHybrid capacitor separatorsHybrid capacitor electrodesEngineeringElectric double-layer capacitor
An electric double layer capacitor includes, contained in a casing, an electrolyte, a positive electrode and a negative electrode each being an electrode containing carbon black, to form an electric double layer at the interface with the electrolyte, and a separator interposed between the positive electrode and the negative electrode. At least one electrode of the positive electrode and the negative electrode has protruded portions or bent portions formed continuously in the height direction against the bottom face of the casing. Further, a space due to the height of the protruded portions or the bent portions is formed between the at least one electrode and the separator.
Owner:MITSUBISHI ELECTRIC CORP +1
Positive electrode of an electric double layer capacitor
InactiveUS7006346B2Inhibit sheddingLow corrosion rateHybrid capacitor electrolytesHybrid capacitor electrodesEngineeringElectric double-layer capacitor
Provided in the present invention is a positive electrode for use in an Electric Double Layer (EDL) Hybrid Electrochemical Capacitor (HEC). Embodiments of the invention can be further adapted produce an EDL HEC with a high specific energy value and a high maximum voltage value. Some aspects of an embodiment of the present invention, including the aforementioned positive electrode, also cooperate to provide an EDL HEC that has a relatively high cycleability.
Owner:AXION POWER INT
Method of formation and charge of the negative polarizable carbon electrode in an electric double layer capacitor
InactiveUS6706079B1Protecting/adjusting hybrid/EDL capacitorDouble layer capacitorsCapacitanceHydrogen
A method of formation and charge of a negative polarizable electrode of an electric double layer capacitor. The method can be used for manufacturing of high capacitance capacitors utilizing the energy of the electric double layer. The methods achieve hydrogen evolution on carbonaceous materials using very negative potentials. The methods provide an EDL capacitor, employing an aqueous electrolyte, with improved specific energy. The methods may also ensure the hermeticity of the capacitor. The methods include pretreating the electric double layer capacitor by keeping the negative polarizable electrode at a desired minimum potential prior to use. Desirably, the minimum potential ranges from about -0.25 to about -1.2 V vs. a reference hydrogen electrode.
Owner:WAINWRIGHT D WALKER
Polymer gel electrolyte, secondary cell, and electrical double-layer capacitor
InactiveUS20020102464A1Large capacityWide operating temperature rangeNon-metal conductorsHybrid capacitor electrolytesPolymer capacitorCapacitance
A polymer gel electrolyte includes an electrolyte solution composed of a plasticizer with at least two carbonate structures on the molecule and an electrolyte salt, in combination with a matrix polymer. Secondary batteries made with the polymer gel electrolyte can operate at a high capacitance and a high current, have a broad service temperature range and a high level of safety, and are thus particularly well-suited for use in such applications as lithium secondary cells and lithium ion secondary cells. Electrical double-layer capacitors made with the polymer gel electrolyte have a high output voltage, a large output current, a broad service temperature range and excellent safety.
Owner:NISSHINBO IND INC
Thermopolymerizable composition for battery use
InactiveUS6562513B1Good storage stabilityHigh strengthCell electrodesFinal product manufactureMeth-Carbonate ester
The present invention provides (1) a thermopolymerizable composition containing a thermopolymerizable compound having (meth)acrylate having a moiety consisting of oxyalkylene, fluorocarbon, oxyfluorocarbon and / or carbonate group within the molecule, an electrolyte salt, an organic polymerization initiator having no benzene ring, and a polymerization retarder having vinyl group within the molecule, (2) a solid electrolyte obtained by heat-curing the composition, (3) a primary battery, a secondary battery and an electric double-layer capacitor each using the solid electrolyte, and processes for manufacturing the same.
Owner:SHOWA DENKO KK
Raw material carbon composition for carbon material for electrode in electric double layer capacitor
ActiveUS7582902B2Improve the level ofGood reproducibilityTransistorCarbon compoundsMetallurgyHydrogen content
Owner:NIPPON OIL CORP
Additive for non-aqueous liquid electrolyte, non-aqueous liquid electrolyte secondary cell and non-aqueous liquid electrolyte electric double layer capacitor
InactiveUS20030170548A1Improve the immunityImprove securityLight-sensitive devicesCell electrodesElectrolytic agentPhysical chemistry
The present invention provides an additive for a non-aqueous electrolyte comprising a phosphazene derivative represented by the following formula (1): (PNR2)n formula (1) wherein R represents a fluorine-containing substituent or fluorine, at least one of all R's is a fluorine-containing substituent, and n represents 3 to 14. More particularly, the present invention provides a non-aqueous electrolyte secondary cell and a non-aqueous electrolyte electric double layer capacitor comprising the additive for a non-aqueous electrolyte which exhibit good low temperature characteristics, good resistance to deterioration, and good incombustibility, and accordingly are significantly high in safety.
Owner:BRIDGESTONE CORP
Electrode metal material, capacitor and battery formed of the material and method of producing the material and the capacitor and battery
The present invention relates to an electrode metal material for batteries, capacitors, etc, used in contact with non-aqueous electrolyte, and particularly to a capacitor formed of the electrode metal material, and provides a valve metal material capable of decreasing the internal resistance of the capacitor. The electrode metal material comprises a valve metal material and numerous carbon particles included in the surface of the valve metal material. The carbon particles are further fixed in the surface of the valve metal material so as to expose to the surface. The electrode metal material is coated with an activated carbon layer and used as a double-layer electrode for an electric double-layer capacitor. The carbon particles included in the surface ensure conduction between the activated carbon layer and the valve metal material. With this configuration, even if the surface of the valve metal material is oxidized, the internal resistance of the electrode is not decreased, the internal resistance of the capacitor is decreased, and the capacitance of the capacitor is increased.
Owner:PANASONIC CORP
Power source device and charge controlling method to be used in same
ActiveUS20050252546A1Improve efficiencyHighly accurate detection of voltageBatteries circuit arrangementsPV power plantsElectric forceSolar cell
A power source device is provided which is capable of charging a secondary cell in a stable manner even in an environment in which power generated by a solar cell varies due to changes in sunlight intensity and / or ambient temperatures. By power generated by a solar cell module, an electric double-layer capacitor is charged and, by using a charging voltage of the electric double-layer capacitor, a booster-type DC-DC (Direct Current-Direct Current) converter is driven. A charge on / off controlling circuit detects the voltage of the electric double-layer capacitor and, when the voltage exceeds a high level threshold voltage, keeps a charge controlling signal (output signal from a terminal) in an active mode and performs a charge starting operation and, after that, when the voltage of the electric double-layer capacitor reaches a low level threshold value, holds the charge controlling signal in a non-active mode and performs a charge stopping operation.
Owner:NEC ENERGY DEVICES LTD
Sheet for forming a polymer gelled electrolyte, a polymer gelled electrolyte using it, and a method for manufacture thereof
InactiveUS6114068AEasy to handleUniform thicknessHybrid capacitor separatorsHybrid capacitor electrolytesLithiumPolymer science
The present invention provides a unique fibrous sheet for forming a polymer gel electrolyte having ion conductivity, a unique polymer gel electrolyte using such a sheet, and a unique method for the manufacture thereof. More specifically, the present invention provides a unique fibrous sheet for forming a polymer gel electrolyte having excellent ion conductivity and suitable as an electrolyte for various electronic devices such as lithium primary batteries, lithium secondary batteries, and electric double layer capacitors, as well as a unique polymer gel electrolyte using such a sheet, and also a unique method for the manufacture thereof.
Owner:SONY CORP
Wound electric double-layer capacitor
ActiveUS7881043B2Inhibit the electrochemical reaction processReduce degradationHybrid capacitor separatorsProtecting/adjusting hybrid/EDL capacitorElectrochemical responsePolymer capacitor
A wound electric double-layer capacitor suppresses electrochemical reaction on polarized electrode layers, reduces characteristic degradation, and has high reliability. The capacitor has a capacitor element formed by winding positive and negative electrodes with a separator interposed between them, a metal case for storing the capacitor element and an electrolyte for driving, and a sealing member for sealing an opening of the metal case. In the positive and negative electrodes, positive and negative electrode lead wires are coupled to exposed parts of current collectors having polarized electrode layers on their both surfaces, respectively. The negative electrode is wound at least one extra turn from the winding end of the positive electrode of the capacitor element, and hence a part where the polarized electrode layers formed in the negative electrode face each other through the separator is formed on the outermost periphery of the capacitor element.
Owner:PANASONIC CORP
Electrical double-layer capacitor
ActiveUS6914768B2Small increase in resistanceIncrease the residual rateHybrid capacitor electrolytesProtecting/adjusting hybrid/EDL capacitorQuaternary ammonium cationTetrafluoroborate
An electrical double-layer capacitor showing a sleight increase of resistance when used under continuous application of high voltage and maintaining high energy residual ratio after standing for a long time includes an electrode element including a pair of electrodes disposed opposite to each other with a separator interposed therebetween, and is impregnated with a nonaqueous electrolyte solution prepared by dissolving quaternary ammonium salts into cyclic carbonates and containing impurities of 30 ppm or less of glycols, 30 ppm or less of primary alcohols and less than 20 ppm of tertiary amines. The water content may be 50 ppm or less. The quaternary ammonium salt may be triethylmethylammonium tetrafluoroborate. The cyclic carbonate may be propylene carbonate. The nonaqueous electrolyte solution may have a concentration of 0.1 to 2.5 mol / liter. The electrode may be a polarizable electrode composed of activated carbon.
Owner:MU IONIC SOLUTIONS CORP +1
Contactless charging system for an artificial organ, a storage device and a feeding device for use with this system
InactiveUS8000800B2Avoid chargingStorage meanElectrotherapySecondary cells charging/dischargingElectric power transmissionArtificial organ
Owner:LIMITED COMPANY TM
Ceramic container and battery and electric double layer capacitor using the same
ActiveUS7304832B2Great deteriorationHybrid capacitor electrodesDouble layer capacitorsCeramic coatingEngineering
Owner:KYOCERA CORP
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