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90 results about "Lithium doping" patented technology
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Spray drying preparation of spherical lithium manganate doped slurry
InactiveCN101462773AEvenly dopedUniform particle sizeManganates/permanganatesGranularityLithium carbonate
The invention relates to a method for the spray drying of spherical doped lithium maganate slurry. The method comprises: mixing manganese dioxide, lithium carbonate, doped metal salt and a solution containing a dispersant according to a certain proportion; subjecting the mixture to mechanical mixing to obtain a uniformly mixed slurry; subjecting the uniformly mixed slurry to spray drying to obtain a spherical precursor; and roasting the precursor sectionally to obtain a spherical doped lithium manganate slurry cathode material product. The lithium manganate cathode material for lithium ion batteries has uniform granularity which averagely is 15mu m, uniform spherical shape and good cycle performance. The invention is simple in process, convenient in operation, environmentally friendly and applicable to industrial production.
Owner:CENT SOUTH UNIV
Oxide solid electrolytes based on lithium halide-doping and low-temperature sintering method thereof
InactiveCN107732295AImprove ionic conductivityImprove performanceSecondary cellsElectrolytesSolid state electrolyteLanthanum
Provided is an oxide solid electrolyte based on lithium halide-doping. The oxide solid electrolyte is a lithium solid electrolyte, wherein electrolytes in a perovskite type, an NASICON type and a garnet type are taken as substrates, and a lithium halide solution and the oxide solid electrolytes are compounded and sintered at a low temperature. A preparing method comprises the steps that LATP, LLTOand LLZO solid electrolytes are subjected to ball-milling, or self-produced cubic-phase lithium-lanthanum-zirconium-oxygen solid electrolyte powder is subjected to ball-milling and sintered to prepare cubic-phase LLZO solid electrolyte powder, an LIX solution is added to the solid electrolyte powder, and the mixture is pressed into a slice or painted into a membrane, then placed in a muffle furnace at a low temperature of 100-250 DEG C and sintered for 1-10 hours. The oxide solid electrolyte is simple in technology and low in cost, and the prepared lithium solid electrolyte has high ionic conductivity and high repeatability; the oxide solid electrolyte can be on a par with electrolytes prepared through a traditional high-temperature technology, and meanwhile low-temperature sintering canavoid high-temperature diffusion reaction with cathode materials.
Owner:YANSHAN UNIV
Cathode material LiMn1-xFexPO4 for lithium ion cell and preparation method of cathode material LiMn1-xFexPO4
ActiveCN104577119AIncrease energy densityImprove cycle performanceCell electrodesPhosphorus compoundsHigh energyManganese
The invention discloses a cathode material LiMn1-xFexPO4 for a lithium ion cell and a preparation method of the cathode material LiMn1-xFexPO4. The preparation method comprises the following steps: manganese source compounds and iron source compounds are adopted as the raw materials to prepare manganese-rich solution and a manganese-poor solution respectively, a FeMnPO4 precursor with a gradient structure is synthesized through a coprecipitation method by controlling the sample adding speed, and then lithium doping and high-temperature calcination are performed to prepare the LiMn1-xFexPO4 with a gradient structure, that is the manganese content of the LiMn1-xFexPO4 is gradually reduced while the iron content of the LiMn1-xFexPO4 is gradually increased from inside to outside along the particle radius of the LiMn1-xFexPO4. The anode material LiMn1-xFexPO4 with the gradient structure has the characteristics of high energy density, good cycle performance and excellent rate capability and is applied to the field of application of power lithium-ion batteries.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Lithium ion battery preparation method and lithium ion battery
ActiveCN102544586AImprove high temperature storage performanceSuppress co-embeddingFinal product manufactureCell electrodesHigh temperature storageManganese
The invention discloses a lithium ion battery and a preparation method of the lithium ion battery. A positive electrode active material is made of lithium cobaltate or lithium cobaltate doped with a part of nickel manganese lithium manganate ternary materials, a negative electrode active material is made of natural modified graphite wrapped by carbon, electrolyte adopts mixed solvent of diethyl carbonate (DEC), ethyl cellulose (EC) and poly carbonate (PC), vinylene carbonate and propylene sulfite annexing agents are added, solid electrolyte interphase (SEI) film is formed preferentially, joint insertion of the organic solvent is restrained, and high temperature performance is excellent. A battery system obviously improves high temperature storage property of the battery on the premise of meeting safety performance, high and low temperature discharge performance and circulation performance of a conventional lithium ion battery. The preparation method is simple, manufacture procedures are easy to control, and the lithium ion battery is easy to popularize and apply.
Owner:ZHENGZHOU BAK BATTERY CO LTD
Silicon-based negative electrode plate, fabrication method thereof and lithium ion battery
InactiveCN109888266AAvoid direct contact reactionsImprove stabilityElectrode carriers/collectorsSecondary cellsElectrical batteryLithium-ion battery
The invention discloses a silicon-based negative electrode plate, a fabrication method thereof and a lithium ion battery. A negative coating layer of the silicon-based negative electrode provided by the invention comprises a first coating layer and a second coating layer, wherein the first coating layer is arranged on a current collector, the second coating layer is arranged on the first coating layer, an active substance in the first coating layer comprises a silicon-based negative electrode material, an active substance in the second coating layer does not comprise a silicon-based negative electrode material, and lithium is contained in a surface of the second coating layer. The fabrication method comprises the steps of 1) coating first paste comprising the silicon-based negative electrode material on the current collector to form the first coating layer; 2) coating second paste which does not contain the silicon-based negative electrode material on the first coating layer to form the second coating layer; and 3) performing lithium doping on a pole plate comprising the second coating layer in advance to obtain the silicon-based negative electrode plate. With the silicon-based negative electrode plate provided by the invention, direct contact of the silicon-based material and metal lithium is prevented during the lithium doping process of the pole plate comprising the silicon-based negative electrode material in advance, and the energy density and the cycle stability are remarkably improved.
Owner:DONGGUAN TAFEL NEW ENERGY TECH CO LTD +2
Method for doping and cladding double modifying for lithium manganate in one step
ActiveCN105576218AImprove structural stabilityImprove cycle performanceElectrode thermal treatmentSecondary cellsManganous-manganic oxideManganate
The invention provides a method for doping and cladding double modifying for lithium manganate in one step. In a product obtained by virtue of the method, during the heat treatment process of an aluminum source on the surface of manganous-manganic oxide, partial aluminum can enter the outer layer lithium manganate to form a LiMn2-xAlxO4 solid solution, and the rest aluminum exists in an oxide form, so that the double modification of doping and cladding on the lithium manganate can be achieved. The aluminum oxide can effectively isolate the direct contact between the lithium manganate and electrolyte; the LiMn2-xAlxO4 solid solution has a structure more stable than that of LiMn2O4 under the condition that the passing of lithium ions is not obstructed. The double-functional modification effectively inhibits the dissolution of bivalent manganese, so that the cycling performance and the high temperature performance of the lithium manganate are improved.
Owner:CENT SOUTH UNIV
Fullerene based hydrogen storage system
A hydrogen storage structure includes a plurality of graphene sheets arranged to form a stack with a plurality of spacers between adjacent graphene sheets in the stack. In one embodiment, the spacers are arranged to provide a distance ranging between 5 Å and 20 Å between adjacent graphene sheets. In one embodiment, the spacers are formed as graphene spheres having a diameter that ranges from 5 Å to 15 Å. In another embodiment, the spacers are formed as graphene single-walled nanontubes having a length that ranges from 5 Å to 20 Å. In a further embodiment, the spacers are formed as graphene sheets having a thickness that ranges from 5 Å to 20 Å. In one embodiment, the plurality of graphene sheets is doped with lithium. In one embodiment, the lithium doping concentration is a ratio of one lithium atom per three carbon atoms.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
Lithium ion battery positive pole active materials and battery
InactiveCN101232095ASlow down the rapid rate of declineAvoid or minimize damageCell electrodesSecondary cellsLithium niobateBattery pack
The invention relates to a positive electrode active substance of lithium ion battery and battery thereof, which belongs to the field of battery. The positive electrode active material of lithium ion battery comprises a first active substance A and a second active substance B, wherein the first active substance A is lithium niobate with following structural formula: LixNbyOz,; and the second active substance B is other active substances capable of doping / undoping lithium except lithium titanate. The mass mixture ratio A / (A+B) of the first active substance A and the second active substance B is between 0.05 and 0.5. The LixNbyOz has stable lithium doping / undoping performance, good cycle performance, low lithium doping / undoping potential about 1.7V (for Li<+> / Li) and wide charge / discharge platform. The invention can effectively postpone the acute decrease speed of the battery voltage and obviate or reduce the damage to the battery or the battery pack caused by overdischarge or reverse polarity. The positive electrode active substance has excellent overdischarge-resistant performance and is suitable for fabricating lithium ion secondary battery in serial battery pack.
Owner:GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
Method for preparing sodium ion battery positive electrode materials with different crystal forms through lithium doping regulation and control
InactiveCN113651368AIncreased disorderSuppresses structural distortionCell electrodesSecondary cellsChemical physicsPhysical chemistry
The invention discloses a method for preparing sodium ion battery positive electrode materials with different crystal forms through lithium doping regulation and control. The chemical formula of the positive electrode materials is Na<0.7>Ni<x> Fe<y>Mn<1-x-y-z>Li O<2>, wherein x + y is more than 0 and less than or equal to 0.4, z is more than 0 and less than or equal to 0.4. The obtained material is a P2 phase material, a P2 / O3 mixed phase material or an O3 phase material by regulating the value of z, namely regulating the doping amount of Li. According to the invention, lithium is doped in a transition metal layer, so that a Na-O-Li structure can be formed to activate the oxidation-reduction reaction of oxygen, thereby providing additional capacity. The structure of the sodium-ion battery positive electrode material can be regulated and controlled by changing the lithium doping ratio, so that P2 phase, O3 phase and P2 / O3 mixed phase materials are obtained. The adopted co-precipitation method is simple and easy to implement, a material with regular morphology and uniform size can be obtained, and the obtained material has good electrochemical performance within the voltage range of 1.5-4.5 V.
Owner:HEFEI UNIV OF TECH +1
High-temperature rate type lithium cobalt oxide anode material and preparation method thereof
ActiveCN105826553AShort de-embedding pathUniform particle distributionCell electrodesCobalt compoundsPhysical chemistryMaterials science
The invention discloses a high-temperature rate type lithium cobalt oxide anode material .The anode material is formed by doping lithium cobalt oxide with metallic elements M .The molecular formula of the anode material is LirCo(1-x)MxO2, wherein 1.00<=1<=1.10, 0.002<=x<=0.005, and the metallic elements M include at least one of Al, Y and Mg .The surface morphology of the lithium cobalt oxide anode material is in a highly agglomerated state that primary particles are closely fused, particle distribution is uniform, fluidity is good, the compaction performance is good, and the rate performance can be improved; the morphology is well kept in the finished lithium cobalt oxide anode material according to the characteristic that the metal elements are uniformly distributed, so that the structural stability of lithium cobalt oxide in the charging and discharging process is improved, the rate discharge performance is improved, the material can adapt to an environment at higher temperature, and therefore the lithium cobalt oxide anode material can have good rate performance in both a normal temperature environment and the high-temperature environment .The invention further provides a preparation method of the high-temperature rate type lithium cobalt oxide anode material .By means of the method, steps are simple and easy to implement, operation is convenient, and cost is low.
Owner:HUNAN SHANSHAN ENERGY TECH CO LTD
Negative electrode material, preparation method thereof and lithium ion battery
PendingCN112803015AImprove the first Coulombic efficiencyImprove cycle performanceElectrode thermal treatmentNegative electrodesElectrical batterySilicon oxygen
The invention provides a negative electrode material, a preparation method thereof and a lithium ion battery. The negative electrode material comprises nano silicon, silicon oxide and crystalline Li2Si2O5, wherein the grain size of the Li2Si2O5 is less than 20nm. The preparation method comprises the following steps: 1) carrying out heat treatment on a silica material in a protective atmosphere or vacuum to obtain a heat-treated silica material; and 2) in a protective atmosphere, mixing the heat-treated silica material with a lithium source, and sintering in the protective atmosphere to obtain the negative electrode material. According to the negative electrode material provided by the invention, lithium doping is performed on the silica material, so that the first coulombic efficiency of the material is greatly improved, and the cycle performance of the material is improved while the high first coulombic efficiency of the material is finally obtained by controlling the grain size of the generated lithium silicate. The lithium silicate is prepared into a small crystal grain size, so that the lithium ion can smoothly complete the lithium intercalation / deintercalation reaction, and good rate capability is shown.
Owner:BTR NEW MATERIAL GRP CO LTD +1
Ternary positive electrode material and preparation method and application thereof
ActiveCN112216836AEasy to storeHollow shape unchangedSecondary cellsPositive electrodesPhysical chemistryMetal-organic framework
The invention provides a ternary positive electrode material as well as a preparation method and application thereof. The ternary positive electrode material is of a three-dimensional hollow structure. According to the present invention, a precursor of a three-dimensional metal organic framework is prepared through a hydrothermal method, and then the ternary positive electrode material is obtainedthrough presintering, lithium doping, high-temperature calcining, mixing and low-temperature calcining. The porous structure of the ternary positive electrode material is beneficial to the storage and rapid transmission of lithium ions, and the rate capability and the cycle performance of the ternary positive electrode material are greatly improved.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD
Preparation method of nickel-cobalt-manganese precursor with laminated and embedded stacked secondary particles
InactiveCN111640935AHigh tap densityLithium-dopedCell electrodesSecondary cellsPhysical chemistryManganese
The invention relates to the technical field of lithium ion ternary positive electrode material precursors, and discloses a preparation method of a nickel-cobalt-manganese precursor with laminated andembedded stacked secondary particles, which comprises the following steps: (1) preparing a raw material solution; (2) blending a reaction kettle base solution; (3) performing a crystal nucleus culture stage; (4) performing a crystal nucleus growth stage; (5) performing a crystal aging stage; and (6) performing washing and drying to obtain a nickel-cobalt-manganese precursor of which the chemicalformula is NixCoyMnz(OH)2, wherein x, y, z is greater than 0, and x+y+z=1. The preparation method has the following advantages and effects: nickel, cobalt and manganese are controlled to uniformly andrapidly grow by regulating and controlling process parameters, performing crystal nucleus division culture, growing, ageing and the like, so that a nickel, cobalt and manganese precursor with a sheet-shaped laminated embedded morphological structure is obtained, the tap density is high, mesoporous channels are formed between sheet layers, lithium doping is easier in the sintering process, and lithium embedding and removing in the interior are smoother; and the primary particles are orderly distributed and agglomerated, so that the stress in the secondary particles is reduced, and the structural stability in the charging and discharging process is improved.
Owner:浙江金鹰新能源技术开发有限公司
Composite positive electrode material and preparation method thereof
PendingCN113991079AThe process is simple and easy to controlLow costSecondary cellsPositive electrodesTemperature controlCyclic stability
The invention discloses a composite sodium ion positive electrode material. The material is of a core-shell structure and is composed of an O3 phase layered material of an inner core and a P2 phase layered material of an outer shell. The high capacity of the inner core O3 type layered material and the high cycle stability of the outer shell P2 type material are integrated, the composite layered material is obtained by subtly regulating and controlling the components of the inner core and the outer shell and combining lithium doping and temperature control, and the composite layered material has excellent comprehensive performance including capacity and cycle performance.
Owner:陈琴雅 +1
Anode active material for battery and preparation method thereof
ActiveCN111180692AImprove stabilityLower pHNegative electrodesSecondary cellsPhysical chemistryBattery cell
The invention relates to an anode active material for a battery. The anode active material comprises anode active material particles, the anode active material particles contain a silica compound. Theanode active material particles comprise a lithium element and a non-lithium doped metal. The non-lithium doped metal comprises one or more of titanium, magnesium, zirconium, zinc, aluminum, yttriumand calcium, and the content of the non-lithium doped metal in the anode active material is 0.01-20 wt%, preferably 0.05-15 wt%, further preferably 0.1-10 wt%, and more preferably 0.1-5 wt%. The secondary battery prepared from the anode active material has the advantages of high capacity, high coulombic efficiency, the long cycle life and high water resistance.
Owner:BERZELIUS (NANJING) CO LTD +1
Method for preparation of lithium-doped cubic-phase SnO2 thin film through low-temperature ultrasonic atomization pyrolysis and deposition
The invention discloses a method for preparation of lithium-doped cubic-phase SnO2 thin film through low-temperature ultrasonic atomization pyrolysis and deposition. According to the method, stannous chloride as a solute, anhydrous ethanol and deionized water as a solvent, and inorganic lithium salt as a dopant are mixed to obtain a solution, the solution is placed in an atomization tank, a substrate is arranged in a clamp to be subjected to ultrasonic atomization pyrolysis spray, so as to obtain the SnO2 thin film deposited on the substrate and excellent in transmittance and conductibility. Lithium ions are placed in SnO2 interstitial voids in an interstitial ion manner to provide conduction electrons, so that the concentration of free charge carriers is increased, and the comprehensive performance of the transparent conductive thin film is improved. Through high-frequency ultrasonic wave, atomization of the precursor solution is realized, so that fine and uniform fog can be obtained; through the improvement of the clamp perpendicular to the substrate, temperature required in the preparation process can be reduced, the energy is saved, and a heating platform is protected; through the method, the cubic-phase SnO2 thin film can be prepared under lower pressure and lower temperature.
Owner:EAST CHINA NORMAL UNIV
Preparation method of cathode active material of lithium ion battery
ActiveCN106159224AIncrease capacityImprove cycle performanceCell electrodesSecondary cellsHigh concentrationReaction rate
The invention discloses a preparation method of a cathode active material of a lithium ion battery. According to the method, modified lithium nickel manganese oxide is used as the cathode active material, so that the cathode active material is high in chemical stability and capacity, can well cooperate with aqueous electrolyte, and can suppress the reaction rate of side reaction; due to the modification of lithium nickel manganese oxide-doped lead, a modified material is high in stability in the aqueous electrolyte, so that generation of the side reaction between the material and the electrolyte interface is suppressed, and the cathode active material is excellent in capacity and circulating performance; as a complexing agent is mixed with lithium, a lithium source solution with high concentration is obtained under the action of the complexing agent; then the lithium source solution is mixed with a cathode active material precursor of the lithium ion battery and dried, so that an obtained mixture of the precursor and the lithium source is high in uniformity.
Owner:广西锰华科技投资有限公司
Lithium-doped high-entropy oxide battery negative electrode material as well as preparation and application methods thereof
ActiveCN112537804AHigh crystallinityIncrease configuration entropyNegative electrodesSecondary cellsChemical physicsElectrical battery
The invention discloses a lithium-doped high-entropy oxide battery negative electrode material as well as preparation and application methods thereof, belongs to the field of lithium ion battery materials, and aims to synthesize lithium-doped high-entropy oxide as a lithium battery negative electrode material through a high-temperature solid-phase method, so that the first discharge capacity of the electrode material is effectively improved through lithium doping, and the cycle stability of the material is improved by the entropy stabilization effect. The performance gain and effect generatedby the good synergistic effect are obviously superior to those generated by traditional element doping. The first reversible specific capacity of the battery negative electrode material is 400-720 mAhg<-1> under the current density of 100 mAhg<-1> in a lithium ion battery half-battery test, the specific capacity is 300-720 mAhg<-1> after 100 times of circulation, and the battery negative electrodematerial shows excellent electrochemical performance. The preparation method provided by the invention is simple in process, high in operability and suitable for industrial production.
Owner:东北大学秦皇岛分校
Partition for lithium ion secondary battery
InactiveCN1453888AAlkaline accumulatorsCell seperators/membranes/diaphragms/spacersOrganic solventPhysical chemistry
Separator for a lithium ion secondary battery generating electromotive force by lithium doping / dedoping, said separator being composed of an organic polymer contained in an electrolytic solution that can swell to retain the electrolytic solution (component A) and is composed of a porous film surrounding a non-woven fabric which is not swellable in the electrolytic solution, the porous film comprising an organic polymer (component B) which is not swellable in the electrolytic solution and has a melting point of 210° C. or more and . An organic polymer (component C) having a melting point of 180° C. or less, wherein component B is added to fibers constituting the nonwoven fabric. The separator is highly safe and exhibits low degradation of mechanical properties towards organic solvents.
Owner:TEIJIN LTD
Cathode active material for a lithium ion capacitor, and method for producing the cathode active material
ActiveUS20130188294A1Improved charge/discharge capacitanceIncrease energy densityNon-metal conductorsHybrid capacitor electrodesCapacitanceHigh energy
The present invention relates to a lithium ion capacitor having excellent capacitance characteristics and high energy density. More particularly, the present invention relates to a cathode active material for a lithium ion capacitor, which utilizes a lithium composite metal oxide having a large initial irreversible capacitance as a specific cathode additive in addition to a carbon-based material applied as a cathode active material, and a production method thereof, and a lithium ion capacitor including the same.According to the present invention, lithium can be electrochemically doped on an anode without using metal lithium, and the capacitance characteristics of a lithium ion capacitor and the safety of a lithium-doping process can be significantly improved.
Owner:KOREA ELECTRONICS TECH INST
Polymer lithium ion battery with high energy density and fast charge and preparation method thereof
InactiveCN112993379AHigh voltageGuaranteed stabilityFinal product manufactureNegative electrodesElectrolytic agentHigh energy
The invention discloses a polymer lithium ion battery with high energy density and fast charge and a preparation method thereof, the battery comprises a positive plate, a negative plate, a porous isolation membrane and an organic electrolyte, the positive plate comprises lithium cobalt oxide, and the lithium cobalt oxide is doped with two elements of aluminum and titanium; the negative plate comprises artificial graphite and a silicon-based material, and the artificial graphite is coated with soft carbon; the porous isolating membrane is a polyethylene membrane subjected to double-sided coating treatment; and the electrolyte comprises a lithium salt, carbonic ester, carboxylic ester and an additive. The working voltage range of the polymer lithium ion battery is 4.48-2.75 V, the polymer lithium ion battery has a 2C rapid charging function, the volume energy density is greater than or equal to 635 Wh / L, and the battery capacity is greater than or equal to 80% within 30 minutes of 2C charging. The cycle life of the battery is long, the capacity retention ratio is over 80% after 500 cycles of charging and discharging at the normal temperature of 2C / 1C, and meanwhile, the high-temperature and low-temperature performance is excellent.
Owner:CHONGQING ZIJIAN NEW ENERGY CO LTD
Preparation method of p type copper oxide thin film with low resistivity and high carrier concentration
InactiveCN105779939ALow resistivityIncrease the carrier concentrationVacuum evaporation coatingSputtering coatingCopper oxideOptoelectronics
The invention discloses a preparation method for a p type copper oxide thin film with low resistivity and high carrier concentration. The method comprises the step of selecting lithium-doped copper oxide as a target for pulsed laser deposition by selecting a proper lithium doping concentration to obtain the p type copper oxide thin film with low resistivity and high carrier concentration, wherein when the doping amount of metal lithium is 2wt%, the resistivity of the obtained p type copper oxide thin film is 7.56 omega.cm, and the carrier concentration is 7.39*10<19> / cm<3>. The preparation method disclosed by the invention is simple to operate and suitable for industrial preparation of the p type copper oxide thin film with low resistivity and high carrier concentration.
Owner:SHAANXI NORMAL UNIV
Complex-phase sodium storage positive electrode material as well as preparation method and application thereof
PendingCN113839018APromote formationThe process is simple and easy to controlElectrode thermal treatmentSecondary cellsPhysical chemistrySodium-ion battery
The invention discloses a complex-phase layered positive electrode material Nan [Liz (Ni < 1-x-y > Mn < x > Fe < y >) < 1-z >] O2. The complex-phase layered positive electrode material consists of a high-capacity O3 phase and a high-cycle-stability P2 phase. In the solid-phase reaction, the formation of the complex-phase positive electrode material is realized by regulating and controlling components, introducing lithium doping and optimizing the reaction temperature. The preparation method is simple and controllable in process, low in energy consumption, low in cost and suitable for large-scale industrial production. The result shows that the prepared multiphase positive electrode material has high capacity and can be applied to the field of sodium ion batteries.
Owner:浙江宇钠科技有限公司
Lithium-oxygen codoping method of ternary lithium ion anode material
InactiveCN108190973ANo restrictionsDoping amount is controllableSecondary cellsPositive electrodesHigh energyPhysical chemistry
The invention discloses a lithium-oxygen codoping method of a ternary lithium ion anode material. The method comprises the steps of mixing a solid substance containing target cations and anions into the ternary lithium ion anode material, performing high energy ball milling to achieve completely uniform mixing, and performing low temperature sintering to form the lithium-oxygen codoped ternary lithium ion anode material. Due to lithium doping, a lithium layer channel can be enlarged; the disembedding resistance of lithium ions is reduced; the rate capability of the material is improved; fluorine doping of oxygen can improve cycling stability of the material; compared with the conventional liquid phase coprecipitation method, the method is short in flow, simple in technology, low in cost and applicable to large-scale plant production and can massively modify the anode material when the method is used for doping modification of the ternary anode material.
Owner:QINGYUAN JIAZHI NEW MATERIAL RES INST CO LTD +1
Separator for lithium ion secondary battery
InactiveUS7094497B2Avoid mechanical propertiesEnsure safetyPrimary cell maintainance/servicingCell seperators/membranes/diaphragms/spacersOrganic solventPhysical chemistry
A separator, used for a lithium ion secondary battery that produces electromotive force by lithium doping / dedoping, which is composed of a porous film comprising an organic polymer (component A) which can swell in an electrolyte solution to retain it, surrounding a nonwoven fabric which cannot swell in the electrolyte solution, the porous film including an electrolyte solution non-swelling organic polymer with a melting point of 210° C. or above (component B) and an electrolyte solution non-swelling organic polymer with a melting point of 180° C. or below (component C), wherein component B is incorporated in the fiber composing the nonwoven fabric. The separator is highly safe and exhibits low reduction mechanical properties with respect to organic solvents.
Owner:TEIJIN LTD
Synaptic thin film transistor based on lithium-doped transparent oxide and preparation method thereof
PendingCN112382573ASynaptic device features are goodVacancy defectTransistorSemiconductor/solid-state device manufacturingThin membraneSemiconductor
Owner:XIAN JIAOTONG LIVERPOOL UNIV
Preparation methods of NH4Fe1-xMxPO4 and LiFe1-xMxPO4/C materials
ActiveCN106477546AEvenly dispersedControllableCell electrodesSecondary cellsFerrous iron compoundHigh rate
Owner:ENERGY RES INST OF SHANDONG ACAD OF SCI
Synthetic method for controllable lithium ion battery cathode material lithium iron phosphate
ActiveCN102820470AAdjust performance indicatorsMeet processing performance requirementsCell electrodesPhosphorus compoundsElectrical batterySlurry
The invention discloses a synthetic method for a controllable lithium ion battery cathode material lithium iron phosphate. The method comprises the following steps: carrying out ball milling and uniform mixing on micrometer iron oxide, lithium dihydrogen phosphate, doping metal acetate and a composite carbon source in a certain weight ratio in a water system, adjusting the concentration of mixture slurry and carrying out spray drying so as to prepare dry precursor powder with good fluidity; subjecting the dry precursor powder to heat treatment at a temperature of 450 to 700 DEG C for 2 to 10 h under the protection of nitrogen so as to obtain a pre-sintered material; and carrying out ball milling and mixing on the pre-sintered material and a carbon source in a certain weight ratio in the water system, adjusting the concentration of mixed slurry of the pre-sintered material, carrying out spray drying so as to prepare secondary dry powder, maintaining the secondary dry powder at a temperature of 650 to 750 DEG C for 2 to 10 h and sieving the cooled sintered material so as to obtain lithium iron phosphate. The lithium iron phosphate material prepared in the invention has the characteristics of adjustable processing performances and adjustable electrochemical performances; through fine adjustment of a formula and a process for the lithium iron phosphate material, parameters like a specific surface area, carbon content, granularity of primary particles, tap density and electrochemical performances of lithium iron phosphate can be changed, and therefore, demands of different electrical core preparation processes are met on the basis that process route does not change.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Solid fuel cell and preparation method thereof
ActiveCN112542591AIncrease energy densityImprove production efficiencyCell electrodesFuel cellsStrontium titanateElectrical conductor
The invention relates to the field of fuel cells, and provides a solid fuel cell and a preparation method thereof. The solid fuel cell comprises an anode layer, a cathode layer and an electrolyte layer arranged between the anode layer and the cathode layer, is characterized in that the material of the anode layer comprises strontium titanate and lithium-doped strontium titanate, the material of the cathode layer comprises perovskite oxide, and the material of the electrolyte layer comprises a solid lithium ion conductor material and an electrolyte material; Ti in strontium titanate in the anode layer is +3 in valence; and the anode layer and the cathode layer have porous structures. According to the solid fuel cell and the preparation method thereof, the stability of the anode porous structure is maintained, the power density of the cell is improved, the preparation efficiency is improved, and the preparation cost is reduced.
Owner:深圳市贝特瑞新能源技术研究院有限公司
Lithium-Doped Silicon-Based Oxide Negative Electrode Active Material, Method of Preparing the Same, and Negative Electrode and Secondary Battery Including the Same
PendingUS20220037656A1Excellent initial efficiency characteristicImprove featuresElectrode thermal treatmentNegative electrodesSilicon oxideBattery cell
Provided are a negative electrode active material which includes a negative electrode active material particles which includes a silicon oxide (SiOx, 0<x≤2); and at least one lithium silicate selected from Li2SiO3, Li2Si2O5, and Li4SiO4 in at least a part of the silicon oxide. The negative electrode active material has a content of a nitrogen element according to X-ray photoelectron spectroscopy (XPS) of 1.45 atom % or less. Also provided are a negative electrode and a lithium secondary battery including the same.
Owner:SK ON CO LTD
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