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1735 results about "Lithium compound" patented technology
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Lithium applications are used in more than 60% of mobile phones. Organic and polymer chemistry. Organolithium compounds are widely used in the production of polymer and fine-chemicals. In the polymer industry, which is the dominant consumer of these reagents, alkyl lithium compounds are catalysts/initiators.
Nano-structured anode compositions for lithium metal and lithium metal-air secondary batteries
ActiveUS20110104571A1High specific capacityHigh reversible capacityFuel and primary cellsConductive materialLithium metalAlloy
This invention provides a nano-structured anode composition for a lithium metal cell. The composition comprises: (a) an integrated structure of electrically conductive nanometer-scaled filaments that are interconnected to form a porous network of electron-conducting paths comprising interconnected pores, wherein the nano-filaments have a transverse dimension less than 500 nm; and (b) micron- or nanometer-scaled particles of lithium, a lithium alloy, or a lithium-containing compound wherein at least one of the particles is surface-passivated or stabilized and the weight fraction of these particles is between 1% and 99% based on the total weight of these particles and the integrated structure together. Also provided is a lithium metal cell or battery, or lithium-air cell or battery, comprising such an anode. The battery exhibits an exceptionally high specific capacity, an excellent reversible capacity, and a long cycle life.
Owner:GLOBAL GRAPHENE GRP INC
Layered barrier structure having one or more definable layers and method
InactiveUS20050147877A1Reduce transmissionLow rateFuel and primary cellsElectrode manufacturing processesDielectricLithium compound
A system provides an environmental barrier also useful for providing a circuit, for example, one having a thin-film battery such as one that includes lithium or lithium compounds connected to an electronic circuit. An environmental barrier is deposited as alternating layers, at least one of the layers providing a smoothing, planarizing, and / or leveling physical-configuration function, and at least one other layer providing a diffusion-barrier function. The layer providing the physical-configuration function may include a photoresist, a photodefinable, an energy-definable, and / or a maskable layer. The physical-configuration layer may also be a dielectric. A layered structure, including a plurality of pairs of layers, each pair including a physical configuration layer and a barrier layer with low gas-transmission rates, may be used in reducing gas transmission rate to beyond currently detectable levels.
Owner:CYMBET CORP
Lithium secondary battery
InactiveUS20070037063A1Large capacityImproved cycle life characteristicsFinal product manufactureOrganic electrolyte cellsOrganic solventHydrogen
Disclosed is a rechargeable lithium battery including an electrolyte comprising an ethylene carbonate compound represented by Formula 1, a non-aqueous organic solvent, and a lithium salt; a negative electrode including a negative active material including a silicon-included alloy and being capable of reversibly forming a compound by reacting with lithium; and a positive electrode including a positive active material comprising a compound being capable of reversibly intercalating and deintercalating lithium ions or a material capable of forming a compound containing lithium by reversibly reacting with lithium. (wherein X and Y are each independently selected from the group consisting of a hydrogen, a halogen, and a fluorinated alkyl having C1 to C5; at least one of X and Y is selected from the group consisting of a halogen, and a fluorinated alkyl having C1 to C5; and M is at least one selected from the group consisting of Al, Sn, Ag, Fe, Bi, Mg, Zn, In, Ge, Pb, and Ti.)
Owner:SAMSUNG SDI CO LTD
Anode for nonaqueous secondary battery, process of producing the anode, and nonaqueous secondary battery
InactiveUS20060147802A1Simple materialRaise the ratioCellsElectrochemical processing of electrodesSurface layerLithium compound
A negative electrode for nonaqueous secondary batteries is disclosed. The negative electrode has a pair of current collecting surface layers of which the surfaces are adapted to be brought into contact with an electrolyte and at least one active material layer interposed between the surface layers. The active material layer contains particles of an active material having high capability of forming a lithium compound. The material constituting the surfaces is preferably present over the whole thickness of the active material layer to electrically connect the surfaces so that the electrode exhibits a current collecting function as a whole. The surface layers each preferably have a thickness of 0.3 to 10 μm.
Owner:MITSUI MINING & SMELTING CO LTD
Preparation method for nickel-manganese-cobalt anode material of lithium ion battery
InactiveCN102306765AImprove discharge capacityImprove cycle performanceCell electrodesManganeseLithium compound
The present invention relates to a preparation method for a nickel-manganese-cobalt anode material of a lithium ion battery. According to the present invention, in the presence of nitrogen atmosphere, a mixed solution containing nickel iron, manganese iron and cobalt ion reacts with a precipitating agent, then processes of aging, washing, drying and the like are performed to obtain a nickel-manganese-cobalt hydroxide precursor, the synthesized precursor material has spherical morphology, ideal particle size distribution and high tap density; the precursor, a lithium compound and a doped compound are mixed, then the sintering processing is performed for twice to prepare the nickel-manganese-cobalt three-element composite anode material. The method has characteristics of simple synthesis process, easy process controlling, low energy consumption, high efficiency and low cost, and is applicable for the industrial production; the prepared precursor material has characteristics of spherical morphology, uniform particle distribution and high tap density; the discharge capacity of the battery is improved through doping the metals; the cycle performance of the battery is stable.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Battery with molten salt electrolyte and high voltage positive active material
InactiveUS20060088767A1High voltageActive material electrodesSecondary cellsMolten saltRechargeable cell
A lithium-based rechargeable battery comprises a positive electrode, a negative electrode, and a molten salt electrolyte that is electrically conductive lithium ions. The positive electrode includes a positive active material that has an electrochemical potential of at least approximately 4.0 volts relative to lithium, and more preferably at least approximately 4.5 V relative to lithium. The electrolyte may further include a source of lithium ions, such as a lithium compound. Other rechargeable batteries using other ionic species can be fabricated to an analogous design.
Owner:TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA +1
Method for preparing positive active material for rechargeable lithium battery and positive active material prepared by same
ActiveUS7326498B2Inhibiting high-temperature swellingElectrode manufacturing processesNon-aqueous electrolyte accumulatorsRare-earth elementAlkaline earth metal
Disclosed is a method of preparing a positive active material for a rechargeable lithium battery including adding first and second compounds to a solvent to prepare an acidic solution with a pH from 0.01 to 3, the first compound including an element that is capable of forming a double bond with an oxygen of a lithium metal oxide, and the second compound including at least one element selected from the group consisting of alkali metals, alkali earth metals, group 13 elements, group 14 elements, transition metals and rare-earth elements; adding a lithium-containing compound to the acidic coating solution to coat the lithium-containing compound; and heat-treating the coated lithium-containing compound to form a surface-treatment layer comprising a compound represented by the formula MXOk where M is an element selected from the group consisting of alkali metals, alkali earth metals, group 13 elements, group 14 elements, transition metals, rare-earth elements and combinations thereof; X is an element that is capable of forming a double bond with oxygen; and k is an integer from 2 to 4.
Owner:SAMSUNG SDI CO LTD
Positive electrode material for non-aqueous electrolyte lithium ion battery and battery using the same
ActiveUS20070082265A1Suppress decomposition of electrolysisPrimary cell to battery groupingNon-aqueous electrolyte accumulatorsElectrolysisDecomposition
A positive electrode material for non-aqueous electrolyte lithium ion battery (31, 41) of the present invention has an oxide (11) containing lithium and nickel, and a lithium compound (13) which is deposited on a surface of the oxide (11) and covers nickel present on the surface of the oxide (11). By this structure, it is possible to suppress decomposition of an electrolysis solution as much as possible and drastically reduce swelling of the batteries (31, 41).
Owner:ENVISION AESC JAPAN LTD
Method of preparing positive active material for rechargeable lithium battery, positive active material for rechargeable lithium battery prepared by same, and rechargeable lithium battery including positive active material
InactiveUS20090253042A1Improve mobilityHigh characteristicsNon-aqueous electrolyte accumulator electrodesLi-accumulatorsSource materialConductive materials
The present invention relates to a method of preparing a positive active material for a rechargeable lithium battery, a positive active material prepared according to the method, and a rechargeable lithium battery including the same. This manufacturing method includes preparing a complex salt solution by mixing a solution including a metal source material and a chelating agent, disposing the complex salt on the surface of a lithium-included compound by adding a lithium-included compound to the complex salt solution, adding a solution including a fluorine source material to the solution including a lithium-included compound with the complex salt on the surface, and heat-treating the mixture. The present invention provides a simple method of economically preparing a positive active material in which structural transition on the surface is prevented and securing a uniform coating layer. In addition, the positive active material can have improved charge and discharge characteristics, cycle life characteristic, and rate characteristic. It also has improved ion conductivity, and accordingly can improve mobility of lithium ions in an electrolyte and thereby improve discharge potential of a battery. Furthermore, the positive active material can decrease the amount of a conductive material and increase density of a substrate.
Owner:ENERCERAMIC
Multi-element composite positive pole material for lithium secondary battery and preparation thereof
ActiveCN101478044AEnsure mixing uniformityAvoid destructionElectrode manufacturing processesSecondary cellsManganeseSpherical shaped
Owner:XTC NEW ENERGY MATERIALS(XIAMEN) LTD
Carbon-coated ternary positive electrode material and preparation method thereof
ActiveCN103474628AImproved magnification performanceImprove conductivityCell electrodesNickel saltManganese
The invention discloses a carbon-coated ternary positive electrode material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing a ternary positive electrode material precursor by taking nickel salt, cobalt salt and manganese salt as raw materials; S2, preparing a conductive carbon dispersion system, wherein conductive carbon is dispersed in water containing an organic carbon source; S3, adding the ternary positive electrode material precursor and a lithium compound into the conductive carbon dispersion system, and mixing uniformly to obtain a mixture; S4, drying the mixture under a vacuum condition; S5, carrying out high temperature treatment on the dried mixture under a closed condition or in an inert gas protection atmosphere so as to obtain the carbon-coated ternary positive electrode material. The carbon-coated ternary positive electrode material is uniform in coating, simple to operate, low in cost and high in efficiency; the conductive carbon and the ternary positive electrode material are simultaneously coated with network-shaped amorphous carbon which serves as a conductive medium or a channel of the conductive carbon and the ternary positive electrode material, thereby greatly improving the rate performance of the ternary positive electrode material.
Owner:SHENZHEN BETTERPOWER BATTERY
Electrolyte additives for lithium sulfur rechargeable batteries
ActiveUS9160036B2Improve Coulombic efficiencyAvoid reactionLi-accumulatorsLithium–sulfur batteryLithium sulfur
An electrolyte solution for a lithium sulfur battery contains a lithium oxalatoborate compound in a 0.05-2 M solution in conventional lithium sulfur battery electrolyte solvents, optionally with other lithium compounds. Examples of solvents include dimethoxyethane (DME), dioxolane, and triethyleneglycol dimethyl ether (TEGDME). Electrochemical cells contain a lithium anode, a sulfur-containing cathode, and a non-aqueous electrolyte containing the lithium oxalatoborate compound. Lithium sulfur batteries contain a casing enclosing a plurality of the cells.
Owner:GM GLOBAL TECH OPERATIONS LLC
Negative electrode for nonaqueous electrolyte secondary battery, method for manufacturing same and nonaqueous electrolyte secondary battery
InactiveUS20060115735A1Simple materialRaise the ratioElectrode manufacturing processesElectrode carriers/collectorsSurface layerLithium compound
An anode for nonaqueous secondary batteries is disclosed. The anode has a pair of current collecting surface layers of which the surfaces are adapted to be brought into contact with an electrolytic solution and at least one active material layer interposed between the surface layers. The active material layer contains particles of an active material having high capability of forming a lithium compound. The material constituting the surfaces is preferably present over the whole thickness of the active material layer to electrically connect the surfaces so that the electrode exhibits a current collecting function as a whole. The surface layers each preferably have a thickness of 0.3 to 10 μm.
Owner:MITSUI MINING & SMELTING CO LTD
High performance lithium titanium spinel li4t15012 for electrode material
The invention concerns a process for producing a spinel compound of formula Li4Ti5O12, comprising a step of preparing a mixture of an organo-lithium compound selected from lithium alcoholates with an organo-titanium compound selected from titanic acid esters, in a liquid medium, and a step of hydrolyzing the mixture of said compounds. The invention also concerns a Li4Ti5O12 particulate material which may be produced according to the previous cited process and which has a BET surface area of at least 10 m<2> / g. The material is particularly useful in the manufacture of Lithium Ion batteries.
Owner:FRANCOIS SUGNAUX +1
Nanoscale lithium titanate compound and preparation method thereof
ActiveCN101630732AEnabling molecular-scale mixingHigh purityElectrode manufacturing processesActive material electrodesLithium compoundCharge and discharge
The invention relates to a nanoscale lithium titanate compound and a preparation method thereof. The nanoscale lithium titanate compound is prepared by following steps: a lithium compound, a titanium compound and a doped element compound are mixed according to a molar ratio of 0.75-0.80:1:0:0.05 of Li to Ti to doped elements so as to form a mixture A; the mixture A and a complexing agent are mixed according to a weight ratio of 1:0.1-10 and dissolved in water to form a mixture B; and the mixture B and a carbon nanotube dispersion C are mixed to form the nanoscale lithium titanate compound coated by carbon nanotubes with a nanoscale grain size. The preparation method comprises the following steps: mixing the mixture B and the carbon nanotube dispersion C; heating an obtained mixture in nitrogen at 100-200 DEG C for 1-2 hours to obtain gel; and sintering the obtained gel in inert atmosphere at 500-1,000 DEG C for 5-48 hours to obtain the powdered lithium titanate compound. The lithium titanate compound is nanoscale lithium titanate coated by the carbon nanotubes, has fine and even grain and high purity and has the characteristics of higher charge and discharge capacity, good rate discharge performance, good cycle performance and good safety performance, and the like, thus the lithium titanate compound is an ideal anode material for manufacturing a lithium ion battery.
Owner:SHENZHEN DYNANONIC
Methods of making lithium metal cathode active materials
The invention provides a novel method for making lithium mixed metal materials in electrochemical cells. The lithium mixed metal materials comprise lithium and at least one other metal besides lithium. The invention involves the reaction of a metal compound, a phosphate compound, with a reducing agent to reduce the metal and form a metal phosphate. The invention also includes methods of making lithium metal oxides involving reaction of a lithium compound, a metal oxide with a reducing agent.
Owner:LITHIUM WERKS TECH BV
Negative electrode for nonaqueous secondary battery, process of producing the negative electrode, and nonaqueous secondary battery
InactiveUS20050208379A1Relaxation stressImprove electronic conductivityElectrolytic coatingsVacuum evaporation coatingLithium compoundCurrent collector
Disclosed is a negative electrode for a nonaqueous secondary battery comprised of a current collector and an active material structure containing an electro-conductive material having low capability of forming a lithium compound on at least one side of the current collector, the active material structure containing 5 to 80% by weight of active material particles containing a material having high capability of forming a lithium compound. The active material structure preferably has an active material layer containing the active material particles and a surface coating layer formed on the active material layer.
Owner:MITSUI MINING & SMELTING CO LTD
Negative electrode for non-aqueous electrolyte secondary cell and method for manufacture thereof, and non-aqueous electrolyte secondary cell
InactiveUS20060051675A1High capability of forming lithium compoundShort lifeElectrode carriers/collectorsNegative electrodesConductive materialsLithium compound
Disclosed is a negative electrode for a nonaqueous secondary battery included of a current collector and an active material structure containing an electro-conductive material having low capability of forming a lithium compound on at least one side of the current collector, the active material structure containing 5 to 80% by weight of active material particles containing a material having high capability of forming a lithium compound. The active material structure preferably has an active material layer containing the active material particles and a surface coating layer formed on the active material layer.
Owner:MITSUI MINING & SMELTING CO LTD
Lithium Secondary Battery
InactiveUS20030190530A1Excellent cycle characteristicsPrevent materialCell seperators/membranes/diaphragms/spacersOrganic electrolyte cellsHydrofluoric acidOrganic base
A lithium secondary battery includes: an electrode body having a positive electrode, a negative electrode, and a separator, the positive electrode and the negative electrode being wound or laminated by means of the separator; and a nonaqueous electrolyte solution containing a lithium compound as a electrolyte. At least one of the positive electrode, the negative electrode, the separator, the nonaqueous electrolyte solution contains at least one of: (a) an organic and / or inorganic inhibitor, which functions as a Cu-corrosion inhibitor or a Cu-trapping agent, (b) a compound having an organic base and an inorganic acid which are unitarily combined in a molecule, (c) a cyclic compound containing a N-O radical in a molecular structure, (d) a cyclic compound which becomes a Mn<2+> supplier in the nonaqueous electrolyte solution, (e) a compound containing an atom showing Lewis acidity and an atom showing Lewis basisity in one molecule, (f) a three-dimensional siloxane compound, and (g) a nonionic surfactant; or the nonaqueous electrolyte solution contains: (h) a water-extracting agent, or (i) a hydrofluoric acid-extracting agent. This lithium secondary battery exhibits an excellent effect that self-discharge property, cycle characteristics, long period stability and reliability can be planned.
Owner:NGK INSULATORS LTD
Lithium-based anode with ionic liquid polymer gel
InactiveUS20120082901A1Electrode manufacturing processesOrganic electrolyte cellsLithiumPhysical chemistry
Li-based anodes for use in an electric current producing cells having long life time and high capacity are provided. In certain embodiments, the Li-based anode comprises at least one anode active Li-containing compound and a composition comprising at least one polymer, at least one ionic liquid, and optionally at least one lithium salt. The composition may be located between the at least one Li-containing compound and the catholyte used in the electric current producing cell. In some embodiments, the at least one polymer may be incompatible with the catholyte. This configuration of components may lead to separation between the lithium active material of the anode and the catholyte. Processes for preparing the Li-based anode and to electric current producing cells comprising such an anode are also provided.
Owner:SION POWER CORP +1
Lithium transition metal complex oxide for lithium ion secondary battery cathode active material and method for producing the same, lithium ion secondary battery cathode active material, and lithium ion secondary battery
InactiveUS20080241693A1Improve featuresAvoid security issuesIron compoundsCobalt compoundsLithium compoundSilicon
A lithium transition metal complex oxide for a lithium ion secondary battery cathode active material contains 100 to 1000 ppm of silicon and 300 to 900 ppm of fluorine. A method for producing the lithium transition metal complex oxide includes the step of mixing a lithium compound, a transition metal compound, a fluorine compound, and a silicon compound to prepare a raw material mixture, and the step of firing the raw material mixture to produce the lithium transition metal complex oxide.
Owner:NIPPON CHECMICAL IND CO LTD
Super-size and high-density lithium cobalt oxide and method for preparing the same
ActiveCN101284681ALarge particle sizeHigh tap densityCell electrodesLithium compoundsHigh densityThermal impact
The invention relates to a high-density lithium cobalt oxide power material with a super-large grain diameter. The method comprises the steps of mixing a cobalt compound, a lithium compound or meanwhile a small amount of doping element compounds; sintering for 3 to 30 hours at the high temperature of 950 to 1,100 DEG C to form a block sintered product; crushing and grading the product to obtain the lithium cobalt oxide power material (molecular formula is LiaCo1-bMbO2), wherein, when b is not equal to 0, the middle diameter of the lithium cobalt oxide containing the doping elements is larger than or equal to 15 Mum, and the tap density is higher than or equal to 2.5g / cm<3>; when b is equal to 0, the middle diameter of the lithium cobalt oxide without the doping elements is larger than 20 Mum, and the tap density is higher than or equal to 2.6g / cm<3>. the 3.6V platform capacity rate of the material as the anode active substance for a lithium battery is higher than or equal to 75%; in the thermal impact test in a 150 DEG C thermotank, the lithium battery with the material is free from leakage and does not catch fire or explode for 60 minutes; the 1C5A specific capacity of the material in the battery is larger than or equal to 135mAh / g.
Owner:BEIJING EASPRING MATERIAL TECH CO LTD
Method for making a lithium mixed metal compound
A method for making a lithium mixed metal compound includes: preparing a reactant mixture that contains a metal compound, a lithium compound, and optionally, a phosphate-containing compound; and exposing the reactant mixture to an atmosphere in the presence of suspended carbon particles, and conducting a reduction to reduce oxidation state of at least one metal ion of the reactant mixture at a temperature sufficient to form a reaction product containing lithium and the reduced metal ion.
Owner:AQUIRE ENERGY CO LTD
Layered lithium-nickel-based compound oxide powder and its production process
ActiveUS20050158546A1High bulk densityGood rate characteristicsElectrode thermal treatmentSolid electrolyte cellsLiquid mediumNickel compounds
A layered lithium-nickel-based compound oxide powder for a positive electrode material for a high density lithium secondary cell, capable of providing a lithium secondary cell having a high capacity and excellent in the rate characteristics also, is provided. A layered lithium-nickel-based compound oxide powder for a positive electrode material for a lithium secondary cell, characterized in that the bulk density is at least 2.0 g / cc, the average primary particle size B is from 0.1 to 1 μm, the median diameter A of the secondary particles is from 9 to 20 μm, and the ratio A / B of the median diameter A of the secondary particles to the average primary particle size B, is within a range of from 10 to 200. In production of a layered lithium-nickel-based compound oxide powder, which comprises spray drying a slurry having a nickel compound and a transition metal element compound capable of substituting lithium other than nickel, dispersed in a liquid medium, followed by mixing with a lithium compound, and firing the mixture, the spray drying is carried out under conditions of 0.4≦G / S≦4 and G / S≦0.0012 V, when the slurry viscosity at the time of the spray drying is represented by V (cp), the slurry supply amount is represented by S (g / min) and the gas supply amount is represented by G (L / min).
Owner:MITSUBISHI CHEM CORP
Lithium ion battery cathode plate, lithium ion battery and preparation method of lithium ion battery
ActiveCN103441236AReduce consumptionReduce irreversible capacityFinal product manufactureNon-aqueous electrolyte accumulator electrodesLithium compoundLithium-ion battery
The invention discloses a lithium ion battery cathode plate. The lithium ion battery cathode plate comprises a cathode current collector and a cathode active material layer, wherein the cathode active material layer is distributed on the cathode current collector and contains a cathode active material, a conductive agent, an adhesive agent and a lithium compound; the lithium compound is decomposed to release lithium and gas in the formation and charging processes of a lithium ion battery. The lithium compound serves as a lithium supplementation material, a cathode potential is unchanged, the lithium compound is decomposed only in the formation and charging processes, the gas generated by decomposition can be removed in the formation process, the lithium generated by decomposition is transferred from a cathode to an anode in the charging process, a solid electrolyte inter-phase (SEI) membrane is formed on the anode, and the lithium required by forming of the SEI membrane is supplemented. Therefore, the consumption of cathode lithium ions can be reduced, the irreversible capacity of the lithium ion battery is reduced, and the cycle performance of the lithium ion battery is improved. The invention also discloses the lithium ion battery with the lithium ion battery cathode plate and a preparation method of the lithium ion battery.
Owner:DONGGUAN AMPEREX TECH +1
Lithium Ion Conductive Material Utilizing Bacterial Cellulose Organogel, Lithium Ion Battery Utilizing the Same and Bacterial Cellulose Aerogel
InactiveUS20080220333A1High mechanical strengthImprove performanceMaterial nanotechnologyConductive materialConductive materialsSolvent
A lithium ion conductive material that excels in mechanical strength, exhibiting high ion conductivity; a bacterial cellulose composite material having an inorganic material and / or organic material incorporated therein; and a bacterial cellulose aerogel. The water of bacterial cellulose hydrogel is replaced by a nonaqueous solvent containing a lithium compound. Bacterial cellulose producing bacteria are grown in a culture medium having an inorganic material and / or organic material added thereto. The bacterial cellulose hydrogel is dehydrated and dried.
Owner:YANO SHOICHIRO +5
Layered barrier structure having one or more definable layers and method
InactiveUS7494742B2Reduce transmissionReduce reduction reactionFuel and primary cellsElectrode manufacturing processesDielectricDiffusion barrier
A system provides an environmental barrier also useful for providing a circuit, for example, one having a thin-film battery such as one that includes lithium or lithium compounds connected to an electronic circuit. An environmental barrier is deposited as alternating layers, at least one of the layers providing a smoothing, planarizing, and / or leveling physical-configuration function, and at least one other layer providing a diffusion-barrier function. The layer providing the physical-configuration function may include a photoresist, a photodefinable, an energy-definable, and / or a maskable layer. The physical-configuration layer may also be a dielectric. A layered structure, including a plurality of pairs of layers, each pair including a physical configuration layer and a barrier layer with low gas-transmission rates, may be used in reducing gas transmission rate to beyond currently detectable levels.
Owner:CYMBET CORP
Pre-embedding method of lithium ion super capacitor cathode
InactiveCN101252043ASimplify the assembly processCapacitor safety performance improvementElectrode manufacturing processesElectrolytic capacitorsConductive polymerLithium compound
The invention discloses an easily implemented lithium pre-insertion novel method for a cathode of a lithium ion super capacitor, wherein, a nonmetal lithium third electrode is led into a novel lithium ion super capacitor system which takes porous charcoal materials, conductive polymers or compounds of the conductive polymers as an anode, lithium insertable metal oxides or charcoal lithium insertion materials as the cathode and organic lithium salt solution as electrolyte, and lithium pre-insertion processing of the cathode with a depth of 5 to 60 percent is performed so as to prevent reduction of the ion concentration of the electrolyte during the charging and discharging process and non-reversible absorption of anions on the anode and improve the charging and discharging characteristics of the capacitor. The essential component of the nonmetal lithium third electrode is lithium-rich compounds with non-reversible lithium-free property; during the preparation process of the porous charcoal material anode or the conductive polymer anode, the lithium-rich compounds of the third electrode are mixed by mass percent of 3 to 50 and can form the lithium ion super capacitor together with the lithium insertable cathode after being prepared into the electrode; during the activation process of the capacitor, lithium pre-insertion of the cathode is realized.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Positive electrode for lithium secondary battery, and lithium secondary battery using the same
ActiveUS20070015058A1Well formedFinal product manufactureSecondary cellsLithium compoundCurrent collector
A positive electrode for use in a lithium secondary battery comprises a positive electrode current collector, and a positive electrode film which is carried on the positive electrode current collector and includes a plurality of mixture layers. The positive electrode film contains, as a positive electrode active material, two or more kinds of lithium-containing compounds having exothermic initiation temperatures different from each other. At least one kind of the two or more kinds of lithium-containing compounds has the exothermic initiation temperature of 300° C. or higher. A first mixture layer of the plural mixture layers closest to the positive electrode current collector contains at least one kind of the lithium-containing compound having the exothermic initiation temperature of 300° C. or higher.
Owner:PANASONIC CORP
Carbon-containing lithium-iron composite phosphorus oxide for lithium secondary battery positive electrode active material and process for producing the same
InactiveUS7025907B2Shorten the diffusion distanceIncrease capacityPhosphatesPeroxides/peroxyhydrates/peroxyacids/superoxides/ozonidesMicroparticleOlivine
A carbon-containing lithium-iron composite phosphorus oxide for a lithium secondary battery positive electrode active material, includes particles being composed of a lithium-iron composite phosphorus oxide having an olivine structure whose basic composition is LiFePO4, and being composited with carbonaceous fine particles. A process for producing the same includes the steps of mixing a lithium compound making a lithium source, an iron compound making an iron source, a phosphorus-containing ammonium salt making a phosphorus source and carbonaceous fine particles, thereby preparing a mixture, and calcicing the mixture at a temperature of from 600° C. or more to 750° C. or less.
Owner:TOYOTA CENT RES & DEV LAB INC
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