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84results about "Reduction and oxidation devices" patented technology
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Graphitic nanofibers in electrochemical capacitors
Graphitic nanofibers, which include tubular fullerenes (commonly called "buckytubes"), nanotubes and fibrils, which are functionalized by chemical substitution, are used as electrodes in electrochemical capacitors. The graphitic nanofiber based electrode increases the performance of the electrochemical capacitors. Preferred nanofibers have a surface area greater than about 200 m2 / gm and are substantially free of micropores.
Owner:HYPERION CATALYSIS INT
Graphitic nanofibers in electrochemical capacitors
InactiveUS20030030963A1Improve performanceMaterial nanotechnologyFixed capacitor electrodesFiberFibril
Owner:HYPERION CATALYSIS INT
Cylindrical high voltage supercapacitor having two separators
InactiveUS6510043B1Simple processReduce in quantityHybrid capacitor electrolytesHybrid capacitor electrodesSupercapacitorEngineering
A method of manufacturing a cylindrical high voltage supercapacitor. An anode and a cathode are provided. At least one bipolar electrode is interposed between the anode and the cathode, and a separator is intervened in each pair of the above electrodes. The anode, the cathode, the bipolar electrode and the separator, as placed in the above order, are wound concentrically into a roll, so as to form the cylindrical high voltage supercapacitor.
Owner:LUXON ENERGY DEVICES CORP
Electrochemical capacitors having electrodes with diverse redox potentials
InactiveUS6414836B1Improve performanceMaterial nanotechnologyLiquid electrolytic capacitorsFiberFibril
Graphitic nanofibers, which include tubular fullerenes (commonly called "buckytubes"), nanotubes and fibrils, which are functionalized by chemical substitution, are used as electrodes in electrochemical capacitors. The graphitic nanofiber based electrode increases the performance of the electrochemical capacitors.
Owner:HYPERION CATALYSIS INT
Electrochemical Cell, Related Material, Process for Production, and Use Thereof
InactiveUS20140211370A1Large capacityHybrid capacitor electrolytesHybrid capacitor electrodesElectricityDesorption
The present invention relates to an electrochemical energy storage device referred to herein as a Metal / Ion Pseudo-Capacitor (MIPC). The MIPC stores charge through reversible metal electro-deposition and dissolution processes as anode functionality and ion adsorption / desorption processes, faradaic processes or both as cathode functionality.
Owner:IONOVA TECH
Redox active reversible electrode and novel battery using the same
InactiveUS20050008934A1Increase energy densityImprove electronic conductivityHybrid capacitor electrodesDouble layer capacitorsSulfurConductive polymer
A redox active reversible electrode includes a conductive substrate and a redox active film formed on at least one surface of the conductive substrate. The redox active film contains a redox active sulfur compound and an electrically conductive polymer of a π electron conjugated compound having p-type doping characteristics.
Owner:NOBORU OYAMA +3
Energy device and various applications using the same
InactiveUS20060134515A1Hybrid capacitor electrolytesHybrid capacitor electrodesReaction rateEnergy device
An object of the present invention is to provide an energy device excellent in input / output characteristics at a low temperature and various applications using the same. The present invention consists in an energy device comprising a positive electrode having a region where a faradic reaction occurs, and a negative electrode having a region where a faradic reaction occurs, wherein at least one of the positive and negative electrodes has a region where a faradic reaction having a reaction rate higher than that of the faradic reaction occurs or a region where a non-faradic reaction occurs.
Owner:HITACHI LTD
Sintered anode pellet treated with a surfactant for use in an electrolytic capacitor
InactiveUS7760488B2Solid electrolytic capacitorsLiquid electrolytic capacitorsElectrolysisElectrolytic capacitor
An electrolytic capacitor anode treated with a surfactant during anodic oxidation is provided. Without intending to be limited by theory, it is believed that the surfactant may lower the surface tension of an electrolyte, which inhibits the clustering of grown oxides and allows the dielectric layer to become more homogeneous and uniformly spread over the anode body. The resulting dielectric layer may thus have a substantially homogeneous thickness, smooth surface, and improved leakage current stability.
Owner:AVX CORP
Cylindrical high voltage supercapacitor and method of manufacturing the same
InactiveUS6579327B1Simple processReduce in quantityHybrid capacitor electrolytesHybrid capacitor electrodesSupercapacitorEngineering
A method of manufacturing a cylindrical high voltage supercapacitor. An anode and a cathode are provided. At least one bipolar electrode is interposed between the anode and the cathode, and a separator is intervened in each pair of the above electrodes. The anode, the cathode, the bipolar electrode and the separator, as placed in the above order, are wound concentrically into a roll, so as to form the cylindrical high voltage supercapacitor.
Owner:LUXON ENERGY DEVICES CORP
Polymers obtained from monomers allowing a sequential polymerization, and their use for preparing ionic conductors
The present invention concerns polymers obtained by anionic initiation and bearing functions that can be activated by cationic initiations that are not reactive in the presence of anionic polymerization initiators. The presence of such cationic initiation functions allow an efficient cross-linking of the polymer after moulding, particularly in the form of a thin film. It is thus possible to obtain polymers with well-defined properties in terms of molecular weight and cross-linking density. The polymers of the present invention are capable of dissolving ionic compounds inducing a conductivity for the preparation of solid electrolytes.
Owner:HYDRO QUEBEC CORP
Low freezing electrolyte for an electrolytic capacitor
InactiveUS6859354B2Improve breakdown voltageImprove conductivityAnti-noise capacitorsHybrid capacitor electrolytesElectrolysisOrganic solvent
An electrolytic capacitor comprising an anode, cathode and an electrolyte. The electrolyte comprises: about 35-60%, by weight water; about 10-55%, by weight organic solvent; about 0.05 to 10%, by weight, sulphuric acid; about 0.05 to 10%, by weight, boric acid; and about 0.05 to 10%, by weight, phosphorus oxy acid.
Owner:MEDTRONIC INC
Energy storage device, energy storage device module, and electric car using the same
InactiveUS20050260497A1Excellent input and output characteristicsImprove featuresHybrid vehiclesAuxillary drivesLithiumReaction layer
An energy storage device comprising a negative electrode plate having a negative electrode active material layer of a carbonaceous composite material formed on a negative electrode collector, a positive electrode plate having a positive electrode active material layer capable of inserting and releasing lithium ions and a non-faradic reaction layer capable of accumulating and releasing electric charges upon physical adsorption-desorption of ions on the surface layer of the positive electrode active material layer and an insulator layer for electrically insulating the positive electrode plate from the negative electrode plate, the insulator layer being capable of permeating only mobile ions. The carbonaceous composite material comprises particles of graphite and / or amorphous carbon and activated charcoal, and the particles of the graphite and / or amorphous carbon and particles of the activated charcoal are united.
Owner:HITACHI LTD
Redox supercapacitor and manufacturing method thereof
InactiveUS20020114128A1Reduce surface resistanceSimplify manufacturing stepsHybrid capacitor separatorsHybrid capacitor electrolytesEngineeringMaterials science
The redox supercapacitor of the present invention utilizes a conducting polyaniline doped with lithium salt, protonic acid, or nucleophilic dopant for fabricating an active electrode, thereby reducing a surface resistance and simplifying fabrication steps. The redox supercapacitor includes a positive electrode plate incorporating therein an electrode active material provided with a polyaniline powder doped with a lithium salt, protonic acid, or nucleophilic dopant, a negative electrode plate incorporating therein an electrode active material provided with a polyaniline powder doped with a lithium salt, protonic acid, or nucleophilic dopant and a polymer electrolyte membrane disposed between the positive electrode plate and the negative electrode plate.
Owner:ELECTRONICS & TELECOMM RES INST
Electrochemical device
InactiveUS8536465B2Final product manufactureSemiconductor/solid-state device detailsElectrochemistryHigh heat
Owner:TAIYO YUDEN KK
Energy device
InactiveUS20070003838A1Improve featuresOvercome disadvantagesHybrid capacitor electrolytesFinal product manufactureReaction rateOxidation state
An energy device with high input / output characteristics and superior characteristics particularly at low temperature. The energy device stores and releases electric energy by means of a faradaic reaction mechanism based mainly on the alteration of the oxidation state of an active material whereby charges move into the active material, and a non-faradaic reaction based mainly on the physical adsorption and separation of ions on the surface of an active material for storing or releasing charges. The output characteristics at low temperature are improved by employing at least two kinds of faradaic reaction mechanism, namely, one with low reaction rate and the other with high reaction rate, which is mainly based on the alteration of the oxide state of an active material for the transfer of charges into the active material via an electrode interface.
Owner:HITACHI LTD
Low freezing electrolyte for an electrolytic capacitor
InactiveUS6939774B2Improve breakdown voltageImprove conductivityAnti-noise capacitorsHybrid capacitor electrolytesElectrolysisOrganic solvent
Owner:KEMET ELECTRONICS CORP +1
Redox capacitor and manufacturing method thereof
ActiveUS20110073991A1Simple structureIncrease the concentration of hydrogenHybrid capacitor electrolytesHybrid capacitor electrodesIndiumVanadium oxide
To provide a redox capacitor that can be used at room temperature and a manufacturing method thereof. Amorphous semiconductor including hydrogen is used as an electrolyte of a redox capacitor. As a typical example of the amorphous semiconductor including hydrogen, an amorphous semiconductor including a semiconductor element such as amorphous silicon, amorphous silicon germanium, or amorphous germanium can be used. As another example of the amorphous semiconductor including hydrogen, oxide semiconductor including hydrogen can be used. As typical examples of the oxide semiconductor including hydrogen, an amorphous semiconductor including a single-component oxide semiconductor such as zinc oxide, titanium oxide, nickel oxide, vanadium oxide, and indium oxide can be given. As another example of oxide semiconductor including hydrogen, a multi-component oxide semiconductor such as InMO3(ZnO)m (m>0 and M is one or more metal elements selected from Ga, Fe, Ni, Mn, and Co) can be used.
Owner:SEMICON ENERGY LAB CO LTD
Method for purification of indole derivative trimer, electrode active substance comprising the purified trimer, method for manufacturing the electrode active substance, and electrochemical cell using the same
InactiveUS20070095656A1Easy to disassembleExcellent in leak current characteristicOrganic chemistryDouble layer capacitorsMetal impuritiesCompound (substance)
The present invention provides a method for easily removing metal impurities from an indole derivative trimer containing the metal impurities, which method involves mixing the indole derivative trimer containing the metal impurities with an imidazole compound in a solvent comprising water under heating, and filtering and separating the indole derivative trimer, from which the metal impurities have been removed, from the obtained mixture. Further, mixing a protonic acid allows the doping of the indole derivative trimer to be conducted simultaneously with the metal impurity removal, whereby the indole derivative trimer can be used as an electrode active substance of an electrochemical cell.
Owner:TOKIN CORP
Sintered Anode Pellet Treated with a Surfactant for Use in an Electrolytic Capacitor
InactiveUS20090185941A1Solid electrolytic capacitorsLiquid electrolytic capacitorsElectrolysisElectrolytic capacitor
An electrolytic capacitor anode treated with a surfactant during anodic oxidation is provided. Without intending to be limited by theory, it is believed that the surfactant may lower the surface tension of an electrolyte, which inhibits the clustering of grown oxides and allows the dielectric layer to become more homogeneous and uniformly spread over the anode body. The resulting dielectric layer may thus have a substantially homogeneous thickness, smooth surface, and improved leakage current stability.
Owner:AVX CORP
Electrode and electrochemical cell therewith
InactiveUS7169509B2Fast charge and dischargeImprove electronic conductivityLiquid electrolytic capacitorsElectrode carriers/collectorsElectrochemical cellMaterials science
This invention provides an electrode comprising a porous conductive substrate as well as an electrode active material and a conductive auxiliary filled in the pores in the substrate. This electrode exhibits improved shape stability (strength), a lower resistivity and better response. This electrode can be used to provide an electrochemical cell capable of quick charge / discharge and exhibiting improved cycle properties.
Owner:TOKIN CORP
Porous Carbon Oxide Nanocomposite Electrodes for High Energy Density Supercapacitors
InactiveUS20110038100A1Large specific surface areaConduct electricityHybrid capacitor electrodesGrapheneCapacitanceElectricity
A high energy density supercapacitor is provided by using nanocomposite electrodes having an electrically conductive carbon network having a surface area greater than 2,000 m2 / g and a pseudo-capacitive metal oxide such as MnO2. The conductive carbon network is incorporated into a porous metal oxide structure to introduce sufficient electricity conductivity so that the bulk of metal oxide is utilized for charge storage, and / or the surface of the conductive carbon network is decorated with metal oxide to increase the surface area and amount of pseudo-capacitive metal oxide in the nanocomposite electrode for charge storage.
Owner:SIEMENS ENERGY INC
Electrochemical capacitor
InactiveUS20090040690A1Excellent corrosion resistance and output characteristicEasy to storeHybrid capacitor electrolytesHybrid capacitor electrodesMetal foilElectrochemistry
[Problems] To provide an electrochemical capacitor that is excellent in corrosion resistance and input / output characteristics and has a good storage capability.[Means for solution] An electrochemical capacitor having a membrane-electrode-collector structure equipped with a pair of electrode layers containing a metal oxide and a proton-conducting polymer bonding agent, the electrode layer being connected to a metal foil collector, and a polymer electrolyte membrane sandwiched by both the electrode layers, wherein both or either of the proton-conducting polymer bonding agent and the polymer electrolyte membrane is(are) a sulfonic acid group-containing polyarylene containing a structural unit represented by general formula (A) and a structural unit represented by general formula (B).
Owner:JSR CORPORATIOON
Novel mixed super capacitor
InactiveCN101399120AIncrease energy densityImprove power densityReduction and oxidation devicesCapacitanceHigh rate
The invention relates to a novel mixed super capacitor which adopts a nano MnO2 electrode as a positive electrode, an activated carbon electrode as a negative electrode and alkaline lithium hydroxide water solution as electrolyte. The positive electrode stores energy by a Faraday oxidation reduction mechanism, and the negative electrode stors energy by a double electrode layer mechanism. When the lithium hydroxide electrolyte is adopted, the reaction mechanism of the nano MnO2 electrode is different from the reaction mechanism in potassium hydroxide electrolyte or neutral water solution. Therefore, the nano MnO2 electrode has higher specific capacitance. The super capacitor has the advantages of perfect high energy intensity, high power intensity, high-rate charge and discharge performance, long circulation service life, low cost and no environmental damages and can be applied to large power charge and discharge occasions.
Owner:SHANGHAI UNIV
Sintered Anode Pellet Etched with an Organic Acid for Use in an Electrolytic Capacitor
InactiveUS20090185330A1Solid electrolytic capacitorsLiquid electrolytic capacitorsOrganic acidElectrolysis
An electrolytic capacitor anode etched with an organic acid prior to anodic oxidation of the anode to create the dielectric layer. Without intending to be limited by theory, it is believed that the organic acid can etch away at least a portion of any oxides on the anode. This provides a relatively uniform surface for the creation of the dielectric, which in turn leads to a dielectric layer having a substantially uniform thickness and homogeneous amorphous structure and thus improved leakage current and stability. The organic acid may also have other residual benefits, such as removing any metallic impurities from the surface of the anode.
Owner:KYOCERA AVX COMPONENTS CORP
Electrochemical capacitor and method of use
InactiveUS7292431B2Restore characteristicElectrode manufacturing processesHybrid capacitor electrodesSolvent2-hydroxybenzaldehyde
The invention is an electrochemical capacitor with its electrodes made on a conducting substrate with a layer of a redox polymer of the poly[Me(R-Salen)] type deposited onto the substrate. Me is a transition metal (for example, Ni, Pd, Co, Cu, Fe), R is an electron-donating substituent (for example, CH3O—, C2H5O—, HO—, —CH3), Salen is a residue of bis(salicylaldehyde)-ethylendiamine in Schiff's base. The electrolyte comprises of an organic solvent, compounds capable of dissolving in such solvents with the resulting concentration of no less than 0.01 mol / l and dissociating with the formation of ions, which are electrochemically inactive within the range of potentials from −3.0 V to +1.5 V (for example, salts of tetramethyl ammonium, tetrapropyl ammonium, tetrabutyl ammonium), and a dissolved metal complex [Me(R-Salen)]. The method of using the capacitor contemplates periodically alternating the connection polarity of the electrodes, causing the electrochemical characteristics of the electrodes to regenerate.
Owner:POWERMERS
Electrochemical device
InactiveUS20110056737A1Final product manufacturePrinted electric component incorporationEngineeringElectrochemistry
Provided is an electrochemical device compatible with high-temperature reflow soldering using a lead-free solder. An electrical double layer capacitor 10-1 includes a package 14 that is constructed with a film or films and has sealed parts 14a1 to 14a3 formed by sealing parts, in which films are superimposed on each other, by, for example, heat sealing. The entireties of the sealed parts 14a1 to 14a3 of the package 14 are covered in a close-contact state with a support 16 that has higher rigidity than the film(s) constructing the package 14.
Owner:TAIYO YUDEN KK
Polymers Obtained From Monomers Allowing A Sequential Polymerization, And Their Use For Preparing Ionic Conductors
The present invention concerns polymers obtained by anionic initiation and bearing functions that can be activated by cationic initiations that are not reactive in the presence of anionic polymerization initiators. The presence of such cationic initiation functions allow an efficient cross-linking of the polymer after moulding, particularly in the form of a thin film. It is thus possible to obtain polymers with well-defined properties in terms of molecular weight and cross-linking density. The polymers of the present invention are capable of dissolving ionic compounds inducing a conductivity for the preparation of solid electrolytes.
Owner:HYDRO QUEBEC CORP
Sintered anode pellet etched with an organic acid for use in an electrolytic capacitor
InactiveUS7768773B2Solid electrolytic capacitorsLiquid electrolytic capacitorsOrganic acidElectrolysis
Owner:KYOCERA AVX COMPONENTS CORP
Cathode material used for high-energy tantalum mixed capacitor and preparation method thereof
ActiveCN101533715AEnlarging the specific volume surface area of the cathodeEnsure super capacityCapacitor electrolytes/absorbentsCapacitor electrodesHigh energyUltra fine
The invention relates to a cathode material used for a high-energy tantalum mixed capacitor and a preparation method thereof; the cathode material comprises a cathode base material made of tantalum foil; the surface of the cathode material made of tantalum foil is coated with composite material of amorphous metal oxide and ultra-fine activated carbon powder; and an electrochemical capacitor is formed between the composite cathode material coated on the surface and injected electrolyte. The amorphous metal oxide coated on the tantalum foil is composite material; the composite material comprises the following substances: pyrrolidone substance is used as a solvent, homopolymer of vinyl fluoride is used as a bonding agent and various metal oxides and ultra-fine carbon powder form the composite material. The composite material comprises the following substances by weight percentage: 56 percent to 73 percent of pyrrolidone, 5 percent to 10 percent of polymer of vinyl fluoride, 2 percent to 5 percent of ultra-fine activated carbon powder and 20 percent to 29 percent of various metal oxides.
Owner:ZHUZHOU RIWANG ELECTRONICS TECH
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