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12376results about "Negative electrodes" patented technology
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Lithium anodes for electrochemical cells
InactiveUS7247408B2Light weightFinal product manufactureElectrode carriers/collectorsLithium metalReactive gas
Owner:SION POWER CORP
Rechargeable lithium/water, lithium/air batteries
InactiveUS20070221265A1Improve protectionEasy to controlFinal product manufacturePV power plantsHigh energyOptoelectronics
Electrochemical cells, and more specifically, rechargeable batteries comprising lithium anodes for use in water and / or air environments, as well as non-aqueous and non-air environments, are presented. In one embodiment, an electrochemical cell includes an anode comprising lithium and a multi-layered structure positioned between the anode and an electrolyte of the cell. A multi-layered structure can include at least a first single-ion conductive material layer (e.g., a lithiated metal layer), and at least a first polymeric layer positioned between the anode and the single-ion conductive material. The invention also can provide an electrode stabilization layer positioned within the electrode, i.e., between one portion and another portion of an electrode, to control depletion and re-plating of electrode material upon charge and discharge of a battery. Advantageously, electrochemical cells comprising combinations of structures described herein are not only compatible with environments that are typically unsuitable for lithium, but the cells may be also capable of displaying long cycle life, high lithium cycling efficiency, and high energy density.
Owner:SION POWER CORP
High Capacity Anode Materials for Lithium Ion Batteries
High capacity silicon based anode active materials are described for lithium ion batteries. These materials are shown to be effective in combination with high capacity lithium rich cathode active materials. Supplemental lithium is shown to improve the cycling performance and reduce irreversible capacity loss for at least certain silicon based active materials. In particular silicon based active materials can be formed in composites with electrically conductive coatings, such as pyrolytic carbon coatings or metal coatings, and composites can also be formed with other electrically conductive carbon components, such as carbon nanofibers and carbon nanoparticles. Additional alloys with silicon are explored.
Owner:IONBLOX INC
Sulfonated block copolymers, method for making same, and various uses for such block copolymers
ActiveUS7737224B2Reduced responseHigh propertySemi-permeable membranesNegative electrodesMethacrylatePolymer science
Owner:KRATON POLYMERS US LLC
Method of depositing silicon on carbon materials and forming an anode for use in lithium ion batteries
ActiveUS20080261116A1Increase rangeMaterial nanotechnologyNanoinformaticsPhysical chemistryCarbon nanofiber
A method of modifying the surface of carbon materials such as vapor grown carbon nanofibers is provided in which silicon is deposited on vapor grown carbon nanofibers using a chemical vapor deposition process. The resulting silicon-carbon alloy may be used as an anode in a rechargeable lithium ion battery.
Owner:APPLIED SCI
Nanocomposite of graphene and metal oxide materials
ActiveUS20100081057A1Easy to distinguishMaterial nanotechnologyRecord information storageDischarge rateCvd graphene
Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge / discharge rate greater than about 10C.
Owner:THE TRUSTEES FOR PRINCETON UNIV +1
Carbon-coated silicon particle power as the anode material for lithium batteries and the method of making the same
InactiveUS20050136330A1Large capacityImprove efficiencyElectrode thermal treatmentElectrode carriers/collectorsCarbon compositesSilicon particle
A process for the production of coated silicon / carbon particles comprising: providing a carbon residue forming material; providing silicon particles; coating said silicon particles with said carbon residue forming material to form coated silicon particles; providing particles of a carbonaceous material; coating said particles of carbonaceous material with said carbon residue forming material to form coated carbonaceous particles; embedding said coated silicon particles onto said coated carbonaceous particles to form silicon / carbon composite particles; coating said silicon / carbon composite particles with said carbon residue forming material to form coated silicon / carbon composite particles; and stabilizing the coated composite particles by subjecting said coated composite particles to an oxidation reaction. The coated composite particles will have a substantially smooth coating. The particles may be coated with multiple layers of carbon residue forming material /
Owner:PYROTECK INC
Chemical protection of a lithium surface
InactiveUS6911280B1Easy to produceSimple processElectrochemical processing of electrodesFinal product manufactureAlkaline earth metalLithium metal
Disclosed are compositions and methods for alleviating the problem of reaction of lithium or other alkali or alkaline earth metals with incompatible processing and operating environments by creating a ionically conductive chemical protective layer on the lithium or other reactive metal surface. Such a chemically produced surface layer can protect lithium metal from reacting with oxygen, nitrogen or moisture in ambient atmosphere thereby allowing the lithium material to be handled outside of a controlled atmosphere, such as a dry room. Production processes involving lithium are thereby very considerably simplified. One example of such a process in the processing of lithium to form negative electrodes for lithium metal batteries.
Owner:POLYPLUS BATTERY CO INC
Lithium alloy/sulfur batteries
Electrochemical cells including anode compositions that may enhance charge-discharge cycling efficiency and uniformity are presented. In some embodiments, alloys are incorporated into one or more components of an electrochemical cell, which may enhance the performance of the cell. For example, an alloy may be incorporated into an electroactive component of the cell (e.g., electrodes) and may advantageously increase the efficiency of cell performance. Some electrochemical cells (e.g., rechargeable batteries) may undergo a charge / discharge cycle involving deposition of metal (e.g., lithium metal) on the surface of the anode upon charging and reaction of the metal on the anode surface, wherein the metal diffuses from the anode surface, upon discharging. In some cases, the efficiency and uniformity of such processes may affect cell performance. The use of materials such as alloys in an electroactive component of the cell have been found to increase the efficiency of such processes and to increase the cycling lifetime of the cell. For example, the use of alloys may reduce the formation of dendrites on the anode surface and / or limit surface development.
Owner:SION POWER CORP
Sulfonated block copolymers, method for making same, and various uses for such block copolymers
ActiveUS20070021569A1High water transport propertyImprove wet strengthSemi-permeable membranesNegative electrodesMethacrylatePolymer science
The present invention is a, solid block copolymer comprising at least two polymer end blocks A and at least one polymer interior block B wherein each A block is a polymer block resistant to sulfonation and each B block is a polymer block susceptible to sulfonation, and wherein said A and B blocks do not contain any significant levels of olefinic unsaturation. Preferably, each A block comprising one or more segments selected from polymerized (i) para-substituted styrene monomers, (ii) ethylene, (iii) alpha olefins of 3 to 18 carbon atoms; (iv) hydrogenated 1,3-cyclodiene monomers, (v) hydrogenated monomers of conjugated dienes having a vinyl content less than 35 mol percent prior to hydrogenation, (vi) acrylic esters, (vii) methacrylic esters, and (viii) mixtures thereof; and each B block comprising segments of one or more polymerized vinyl aromatic monomers selected from (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof. Also claimed are processes for making such block copolymers, and the various end uses and applications for such block copolymers.
Owner:KRATON POLYMERS US LLC
Nonaqueous electrolyte secondary battery and battery module
ActiveUS20050069777A1Excellent in battery capacity characteristic and cycle performanceEasy dischargeFinal product manufactureElectrode carriers/collectorsAlloyAluminum foil
A nonaqueous electrolyte secondary battery includes a case, a nonaqueous electrolyte provided in the case, a positive electrode provided in the case, and a negative electrode provided in the case, the negative electrode comprising a negative electrode current collector and a negative electrode layer that is carried on the negative electrode current collector and contains negative electrode active material particles, and the negative electrode current collector comprising an aluminum foil having an average crystal grain size of 50 μm or less or an aluminum alloy foil having an average crystal grain size of 50 μm or less.
Owner:KK TOSHIBA
Silicon-silicon oxide-lithium composite, making method, and non-aqueous electrolyte secondary cell negative electrode material
ActiveUS20070224508A1Improve initial efficiencyImprove cycle performanceSecondary cellsNegative electrodesOxide compositeSilicon oxide
A silicon-silicon oxide-lithium composite comprises a silicon-silicon oxide composite having such a structure that silicon grains having a size of 0.5-50 nm are dispersed in silicon oxide, the silicon-silicon oxide composite being doped with lithium. Using the silicon-silicon oxide-lithium composite as a negative electrode material, a lithium ion secondary cell having a high initial efficiency and improved cycle performance can be constructed.
Owner:SHIN ETSU CHEM IND CO LTD
Chemical protection of a lithium surface
InactiveUS20050186469A1Easy to produceEasy to processElectrochemical processing of electrodesFinal product manufactureAlkaline earth metalLithium metal
Disclosed are compositions and methods for alleviating the problem of reaction of lithium or other alkali or alkaline earth metals with incompatible processing and operating environments by creating a ionically conductive chemical protective layer on the lithium or other reactive metal surface. Such a chemically produced surface layer can protect lithium metal from reacting with oxygen, nitrogen or moisture in ambient atmosphere thereby allowing the lithium material to be handled outside of a controlled atmosphere, such as a dry room. Production processes involving lithium are thereby very considerably simplified. One example of such a process is the processing of lithium to form negative electrodes for lithium metal batteries.
Owner:POLYPLUS BATTERY CO INC
Anode active material, method of preparing the same, and anode and lithium battery containing the material
ActiveUS20060134516A1Improve capacity efficiencyImprove charge/discharge efficiencyElectrode thermal treatmentNon-aqueous electrolyte accumulatorsFiberGraphite
Owner:SAMSUNG SDI CO LTD
Mesoporous carbon materials comprising bifunctional catalysts
InactiveUS20110223494A1Facilitate metal-air reactionHigh specific energyFuel and primary cellsFuel and secondary cellsLithium–air batteryElectrical devices
The present application is directed to mesoporous carbon materials comprising bi-functional catalysts. The mesoporous carbon materials find utility in any number of electrical devices, for example, in lithium-air batteries. Methods for making the disclosed carbon materials, and devices comprising the same, are also disclosed.
Owner:BASF AG
Lithium anodes for electrochemical cells
InactiveUS20060222954A1Light weightFinal product manufactureElectrode carriers/collectorsLithium metalReactive gas
Provided is an anode for use in electrochemical cells, wherein the anode active layer has a first layer comprising lithium metal and a multi-layer structure comprising single ion conducting layers and polymer layers in contact with the first layer comprising lithium metal or in contact with an intermediate protective layer, such as a temporary protective metal layer, on the surface of the lithium-containing first layer. Another aspect of the invention provides an anode active layer formed by the in-situ deposition of lithium vapor and a reactive gas. The anodes of the current invention are particularly useful in electrochemical cells comprising sulfur-containing cathode active materials, such as elemental sulfur.
Owner:SION POWER CORP
Carbon materials metal/metal oxide nanoparticle composite and battery anode composed of the same
InactiveUS7094499B1High densityReduce irreversible capacityConductive materialSecondary cellsChemical treatmentMetal oxide nanoparticles
A method of forming a composite material for use as an anode for a lithium-ion battery is disclosed. The steps include selecting a carbon material as a constituent part of the composite, chemically treating the selected carbon material to receive nanoparticles, incorporating nanoparticles into the chemically treated carbon material and removing surface nanoparticles from an outside surface of the carbon material with incorporated nanoparticles. A material making up the nanoparticles alloys with lithium.
Owner:NASA
Electrode protection in both aqueous and non-aqueous electrochemical cells, including rechargeable lithium batteries
ActiveUS20070224502A1Preventing electronic communicationAvoid communicationFinal product manufactureElectrode carriers/collectorsHigh energyConductive materials
Electrode protection in electrochemical cells, and more specifically, electrode protection in both aqueous and non-aqueous electrochemical cells, including rechargeable lithium batteries, are presented. In one embodiment, an electrochemical cell includes an anode comprising lithium and a multi-layered structure positioned between the anode and an electrolyte of the cell. A multi-layered structure can include at least a first single-ion conductive material layer (e.g., a lithiated metal layer), and at least a first polymeric layer positioned between the anode and the single-ion conductive material. The invention also can provide an electrode stabilization layer positioned within the electrode, i.e., between one portion and another portion of an electrode, to control depletion and re-plating of electrode material upon charge and discharge of a battery. Advantageously, electrochemical cells comprising combinations of structures described herein are not only compatible with environments that are typically unsuitable for lithium, but the cells may be also capable of displaying long cycle life, high lithium cycling efficiency, and high energy density.
Owner:SION POWER CORP
Solid state activity-activated battery device and method
InactiveUS6906436B2Sufficient energy storageBatteries circuit arrangementsFinal product manufactureEngineeringElectron
A system includes a thin-film battery and an activity-activated switch. The system is placed on a substrate with an adhesive backing. In some embodiments, the substrate is flexible. Also formed on the substrate is an electrical circuit that includes electronics. The activity-activated switch places the thin-film battery in electrical communication with the circuit and electronics. The battery and the circuit are formed on the substrate and may be comprised of one or a plurality of deposited layers.
Owner:CYMBET CORP
Plating technique for electrode
ActiveUS20130017441A1Electrode manufacturing processesFinal product manufactureElectrical batteryEngineering
Articles and methods for forming protected electrodes for use in electrochemical cells, including those for use in rechargeable lithium batteries, are provided. In some embodiments, the articles and methods involve an electrode that does not include an electroactive layer, but includes a current collector and a protective structure positioned directly adjacent the current collector, or separated from the current collector by one or more thin layers. Lithium ions may be transported across the protective structure to form an electroactive layer between the current collector and the protective structure. In some embodiments, an anisotropic force may be applied to the electrode to facilitate formation of the electroactive layer.
Owner:SION POWER CORP
Composition for protecting negative electrode for lithium metal battery, and lithium metal battery fabricated using same
InactiveUS20050042515A1Improve cycle lifeInhibit side effectsFinal product manufactureNegative electrodesLithium metalPlasticizer
Disclosed is a composition for protecting a negative electrode for a lithium metal battery including a multifunctional monomer having at least two double bonds for facilitating cross-linking, a plasticizer, and at least one alkali metal salt.
Owner:SAMSUNG SDI CO LTD
Silicon composite particles, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell
ActiveUS20050214644A1Improve cycle performanceMinimize changesSilicaNitrogen compoundsSilicon alloyInorganic compound
Silicon composite particles are prepared by sintering primary fine particles of silicon, silicon alloy or silicon oxide together with an organosilicon compound. Sintering of the organosilicon compound results in a silicon-base inorganic compound which serves as a binder. Each particle has the structure that silicon or silicon alloy fine particles are dispersed in the silicon-base inorganic compound binder, and voids are present within the particle.
Owner:SHIN ETSU CHEM IND CO LTD
Compliant seal structures for protected active metal anodes
ActiveUS20100112454A1Avoid lostReduced ionic contact areaPrimary cell to battery groupingFuel and primary cellsOptoelectronicsAnodic protection
Protected anode architectures have ionically conductive protective membrane architectures that, in conjunction with compliant seal structures and anode backplanes, effectively enclose an active metal anode inside the interior of an anode compartment. This enclosure prevents the active metal from deleterious reaction with the environment external to the anode compartment, which may include aqueous, ambient moisture, and / or other materials corrosive to the active metal. The compliant seal structures are substantially impervious to anolytes, catholyes, dissolved species in electrolytes, and moisture and compliant to changes in anode volume such that physical continuity between the anode protective architecture and backplane are maintained. The protected anode architectures can be used in arrays of protected anode architectures and battery cells of various configurations incorporating the protected anode architectures or arrays.
Owner:POLYPLUS BATTERY CO INC
Thin film electrochemical energy storage device with three-dimensional anodic structure
InactiveUS20100216026A1Final product manufactureElectrode carriers/collectorsPorosityMicro structure
A method for forming a battery from via thin-film deposition processes is disclosed. A mesoporous carbon material is deposited onto a surface of a conductive substrate that has high surface area, conductive micro-structures formed thereon. A porous, dielectric separator layer is then deposited on the layer of mesoporous carbon material to form a half cell of an energy storage device. The mesoporous carbon material is made up of CVD-deposited carbon fullerene “onions” and carbon nano-tubes, and has a high porosity capable of retaining lithium ions in concentrations useful for storing significant quantities of electrical energy. Embodiments of the invention further provide for the formation of an electrode having a high surface area conductive region that is useful in a battery structure. In one configuration the electrode has a high surface area conductive region comprising a porous dendritic structure that can be formed by electroplating, physical vapor deposition, chemical vapor deposition, thermal spraying, and / or electroless plating techniques.
Owner:APPLIED MATERIALS INC
Battery and non-aqueous electrolyte secondary battery using the same
InactiveUS20050064291A1Increase energy densityExcellent cycle characteristicsElectrode carriers/collectorsNegative electrodesEngineeringNon aqueous electrolytes
A negative electrode for a non-aqueous electrolyte secondary battery including a current collector, and an electrode material layer including an electrode material capable of reversibly absorbing and desorbing Li ions is provided. The electrode material includes at least one element selected from the group consisting of Si, Sn and Al; the surface of the current collector is provided with protrusions; the electrode material layer is disposed on the surfaces of the current collector and the protrusions; and the protrusion has a portion facing the surface of the current collector other than a portion that is brought into contact with the current collector. Thus, a negative electrode for a non-aqueous electrolyte battery having high properties such as an energy density, charging / discharging cycle property, and the like, and a non-aqueous electrolyte secondary battery can be provided.
Owner:PANASONIC CORP
Nonaqueous electrolyte secondary cell
ActiveUS20060166098A1Improve cycle performanceImprove cycle lifeSecondary cellsNegative electrodesSiliconMaterials science
The present invention provides a non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode having a negative active material, and a non-aqueous electrolyte; characterized in that said negative active material contains composite particle (C), which has silicon-containing particle (A) and electronic conductive additive (B), and carbon material (D), wherein the weight of said electronic conductive additive (B) falls within the range of 0.5 wt. % to 60 wt. % to the weight of said composite particle (C). The negative active material contains silicon which is capable of performing high discharge capacity, so that a non-aqueous electrolyte secondary battery having a large discharge capacity can be obtained. In addition, since the negative active material contains the electronic conductive additive (B) and the carbon material (D), the contact conductivity between the silicon-containing particle (A) or between the negative active material improves and, as a result, a non-aqueous electrolyte secondary battery having satisfactory cycle performance can be attained.
Owner:GS YUASA INT LTD
Silicon oxide based high capacity anode materials for lithium ion batteries
Silicon oxide based materials, including composites with various electrical conductive compositions, are formulated into desirable anodes. The anodes can be effectively combined into lithium ion batteries with high capacity cathode materials. In some formulations, supplemental lithium can be used to stabilize cycling as well as to reduce effects of first cycle irreversible capacity loss. Batteries are described with surprisingly good cycling properties with good specific capacities with respect to both cathode active weights and anode active weights.
Owner:IONBLOX INC
Negative pole for a secondary cell, secondary cell using the negative pole, and negative pole manufacturing method
ActiveUS20040175621A1High reversible capacityImprove cycle performanceVacuum evaporation coatingSputtering coatingDischarge efficiencySodium-ion battery
An anode for a secondary battery capable of inserting and extracting a lithium ion having a multi-layered structure including a first anode layer (2a) containing carbon as a main component; a second anode layer (3a) made of a film-like material through which a lithium component passes; and a third anode layer (4a) containing lithium and / or a lithium-containing compound as a main component. The battery capacity of the lithium ion battery is substantially increased while the higher charge-discharge efficiency and the stable cycle performance are maintained.
Owner:NEC CORP
Anode active material, manufacturing method thereof, and non-aqueous electrolyte secondary battery
In order to provide a 3V level non-aqueous electrolyte secondary battery with a flat voltage and excellent cycle life at a high rate with low cost, the present invention provides a positive electrode represented by the formula: Li2±α[Me]4O8−x, wherein 0≦α<0.4, 0≦x<2, and Me is a transition metal containing Mn and at least one selected from the group consisting of Ni, Cr, Fe, Co and Cu, said active material exhibiting topotactic two-phase reactions during charge and discharge.
Owner:OSAKA CITY UNIV +1
Nonaqueous electrolyte battery, battery pack and vehicle
ActiveUS20080166637A1Final product manufactureElectric propulsion mountingUnsaturated hydrocarbonTitanium
A nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode contains a titanium-containing oxide. The nonaqueous electrolyte contains a compound having a functional group represented by the formula (1) below and a sultone having an unsaturated hydrocarbon group.[Chem.]
Owner:KK TOSHIBA
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