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45results about How to "Reduce surface residual alkali" patented technology
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Preparation method for high-nickel material surface coating layer
InactiveCN105280885AReduce surface residual alkaliImprove cycle stabilityCell electrodesLithiumSide reaction
The invention discloses a preparation method for a high-nickel material surface coating layer, and in particular relates to a preparation method for a lithium-contained coating layer formed by residual lithium on the surface of the high-nickel material. A negative ion with a function of depositing the residual lithium on the surface of the high-nickel material is adopted for coating the surface of the high-nickel material; the residual amount of alkali on the surface of the high-nickel material is effectively reduced by the preparation method; and meanwhile, the coating layer enables the high-nickel material and an electrolyte to be separated, so that the side reaction between the electrolyte and the surface is reduced, and cycling stability and the storage property of the material are improved.
Owner:BEIJING EASPRING MATERIAL TECH CO LTD
High nickel ternary positive electrode material applied to lithium secondary battery and preparation method thereof
ActiveCN110690416AImprove structural stabilityImprove cycle performanceCell electrodesSecondary cellsElectrolytic agentElectrical battery
The invention relates to the technical field of lithium ion batteries. In order to solve the problems of poor compatibility and poor cycle performance, rate performance, processability, and safety ofexisting high nickel ternary materials and electrolytes, the invention provides a high nickel ternary positive electrode material applied to a lithium secondary battery and a preparation method thereof. The high nickel ternary positive electrode material applied to the lithium secondary battery comprises a base material and a composite coating layer outside the base material. The chemical formulaof the base material is Li1.02Ni1-x-yCoxMnyMZO2. M is selected from the group consisting of Al, Mg, Ti, and Si. (1-x-y), x, y, and z are the molar ratios of Ni, Co, Mn, and M respectively. (1-x-y) isgreater than or equal to 0.6 and less than 1. x is greater than 0 and less than 0.4. y is greater than 0 and less than 0.4. z is greater than 0 and less than or equal to 0.02. According to the invention, the high nickel ternary positive electrode material applied to the lithium secondary battery has the advantages of low surface alkalinity, good processability, excellent electrochemical performance, high safety, and good compatibility with electrolytes; and the battery made of the material has the advantages of significantly improved cycle life and excellent electrochemical performance.
Owner:ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL +1
Positive electrode material, preparation method thereof and lithium ion battery
ActiveCN112750999ALow costUniform coating effectMaterial nanotechnologyPolycrystalline material growthPhysical chemistryManganese
The invention relates to the technical field of lithium ion batteries, and discloses a positive electrode material, a preparation method thereof and a lithium ion battery. The positive electrode material comprises a high-nickel cobalt-free multi-element positive electrode material intermediate and a cobalt-containing compound coating the outer surface of the high-nickel cobalt-free multi-element positive electrode material intermediate, and the total mole number of nickel and manganese in the high-nickel cobalt-free multi-element positive electrode material intermediate is taken as a reference, the content of the cobalt-containing compound in terms of cobalt element is 0.5-5 mol%. The positive electrode material is stable in structure, high in energy density, good in rate capability, high in capacity retention ratio, simple in preparation method and low in cost.
Owner:BEIJING EASPRING MATERIAL TECH CO LTD
Lithium cobaltate-coated high-nickel ternary positive electrode material and preparation method thereof
InactiveCN110247031AAvoid direct contact with airReduce surface residual alkaliCell electrodesLithium carbonateChemistry
The invention relates to a lithium cobaltate-coated high-nickel ternary positive electrode material and a preparation method thereof. The preparation method comprises the following steps of: mixing a high-nickel ternary precursor, nano cobaltosic oxide, and a lithium source, and calcining the mixture at 750-820 degrees centigrade to obtain the lithium cobaltate-coated high-nickel ternary positive electrode material, wherein the mass ratio of the nano cobaltosic oxide to the high-nickel ternary precursor is 0.05 to 0.2:1. The surface of the high-nickel ternary positive electrode material is uniformly coated with a layer of lithium cobaltate material, thereby protecting the reticular structure of the high-nickel ternary positive electrode material, reducing the nickel-lithium ion mixing, improving the electronic conduction, the cycle performance and the rate performance of the material, additionally avoiding direct contact between the surface of high-nickel ternary positive electrode material and the air, reducing the water absorption of the material and the formation of surface lithium hydroxide and lithium carbonate, reducing residual alkali on the surface of the material, and optimizing the processing properties of the material.
Owner:RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
High-nickel ternary positive electrode material containing active oxygen removing agent and preparation method thereof
PendingCN110071278AInhibit oxidation and decomposition gas productionAvoid impedanceCell electrodesSecondary cells servicing/maintenanceFiltrationDecomposition
The invention discloses a high-nickel ternary positive electrode material containing an active oxygen removing agent. The high-nickel ternary positive electrode material containing the active oxygen removing agent comprises the active oxygen removing agent and a high-nickel ternary material. The invention also provides a preparation method of the high-nickel ternary positive electrode material coated with the active oxygen removing agent; and according to the preparation method, the high nickel ternary positive electrode material and the active oxygen removing agent are dissolved in absolute ethanol according to a certain mass ratio for ultrasonic dispersion, and the high-nickel ternary positive electrode material coated with the active oxygen removing agent is obtained by performing vacuum drying on the sample at 100 degrees centigrade for 12 to 24 hours after filtration. The preparation method of the high-nickel ternary positive electrode material coated with the active oxygen removing agent can not only eliminate the active oxygen formed during circulation or storage of the high-nickel ternary positive electrode material, and inhibit the oxidative decomposition and gas production of the electrolyte, but also eliminate the residual lithium on the surface of the high-nickel ternary positive electrode material, reduce the surface residual alkali, and maintain chemical stabilityof the carbonate solvent in the electrolyte; therefore, the cycle performance and stability are improved, and the cycle storage gas production and impedance increase of the battery are effectively inhibited; and the coating process is simple and easy to operate.
Owner:SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
Coated ternary positive electrode material and preparation method and application thereof
PendingCN110970604AImprove cycle stabilityImproved magnification performanceSecondary cellsPositive electrodesTantalum compoundLithium
The invention discloses a coated ternary positive electrode material and a preparation method and application thereof. The coated ternary positive electrode material comprises a ternary positive electrode material and a lithium-and-tantalum-containing coating layer coated on the surface of the ternary positive electrode material. According to the preparation method, a tantalum compound is used asa coating raw material to coat a ternary material containing residual alkali on the surface, the residual alkali reacts with the tantalum compound to form the lithium-and-tantalum-containing coating layer on the surface of the ternary positive electrode material, so that the coated ternary positive electrode material is obtained, and the residual alkali comprises Li2CO3 and / or LiOH. By adopting the preparation method disclosed by the invention, the electrochemical properties such as rate capability and cycle performance of the material can be improved while the solubility of residual alkali and the material is reduced.
Owner:SHENZHEN CITY BATTERY NANOMETER TECH
Ternary cathode material precursor and preparation method thereof
ActiveCN107285394AHigh crystallinityUniform particle size distributionManganese oxides/hydroxidesNickel oxides/hydroxidesNickel saltManganese
The invention provides a preparation method of a ternary cathode material precursor. The preparation method comprises the following steps: (1) co-precipitation: using pure water to prepare a mixed metal ion solution of soluble nickel salts, manganese salts, and cobalt salts, mixing the mixed metal ion solution with an alkali metal hydroxide solution and an ammonium salt solution; after precipitation, separating solids and liquid, and blowing the solids to obtain a first nickel-manganese-cobalt hydroxide material; and (2) primary drying: drying the first nickel-manganese-cobalt hydroxide material obtained in the step (1) in vacuum to obtain the primarily dried ternary cathode material precursor. The ternary cathode material precursor prepared by the provided preparation method has the following physical and chemical indexes: the particle distribution span is not more than 1.2; D50 is 9 to 12 [mu]m; and the tap density is not less than 2.40 g / cm3. The preparation method has the advantages that the operation is simple, the particle distribution of prepared ternary cathode material precursor is uniform, the tap density is high, impurities can be removed easily, and the method is practical.
Owner:GEM WUXI ENERGY MATERIAL CO LTD
Modification method for reducing residual alkali on surface of high-nickel ternary positive electrode material, prepared high-nickel ternary positive electrode material and lithium ion battery
InactiveCN112340783AReduce surface residual alkaliReduce prolapseFinal product manufactureCell electrodesElectrical batteryPhysical chemistry
The invention discloses a modification method for reducing residual alkali on the surface of a high-nickel ternary positive electrode material, which comprises the following steps of (1) uniformly mixing the high-nickel ternary positive electrode material with a solvent to form slurry, and (2) rapidly leaching the slurry with a solvent, then carrying out filter pressing and drying, and sintering the dried product to obtain the high-nickel ternary positive electrode material with low residual alkali, The solvent is selected from one or a mixture of more of deionized water, ammonia water and alcohol. According to the method, the high-nickel ternary positive electrode material is pulped, and then residual alkali on the surface of the material is reduced by a rapid leaching method, so that theresidual alkali on the surface of the material is further reduced; under the condition that the specific surface area is not obviously increased, LiOH and Li2CO3 on the surface of the material are reduced; meanwhile, the removal of lattice lithium is reduced, the first specific discharge capacity of the high-nickel ternary positive electrode material is not reduced due to water washing, the high-temperature cycle performance and the high-temperature storage performance of the high-nickel ternary positive electrode material are further improved, and the increase of high-temperature cycle DCR is reduced.
Owner:宜宾锂宝新材料有限公司
Preparation method of layered lithium-rich sosoloid cathode material
ActiveCN104518214AGood high temperature cycleEasy to storePositive electrodesMaterials scienceSurface modification
The invention discloses a preparation method of a layered lithium-rich sosoloid cathode material. In the preparation method, the excess lithium source is sintered, then the sintered lithium source is washed by water, and then the processed intermediate is subjected to surface modification so as to obtain the cathode material. Through the technical scheme mentioned above, the mixed arrangement of Li+ and Ni2+ in the cathode material is effectively reduced, at the same time, the alkali residues on the cathode material surface are reduced, and the stability of the cathode material is improved. The cathode material prepared by the provided preparation method has the characteristics of good high temperature cycling performance, good storage performance, good rate capability, simple and easy preparation process, and low cost.
Owner:BEIJING EASPRING MATERIAL TECH CO LTD
Mg-Doped nickel-cobalt-aluminum ternary cathode material and preparation method and application thereof
InactiveCN108417807AImprove structural stabilityImprove electrochemical performanceCell electrodesSecondary cellsCobaltNanotechnology
The invention provides a Mg-doped nickel-cobalt-aluminum ternary cathode material and a preparation method and application thereof. The Mg-doped nickel-cobalt-aluminum ternary cathode material has thechemical formula of (LiaNi1-x-yCoxAly)1-bMgbO2, with y>0, 1-x-y>0, 1< / =a< / =1.1, and 0<b< / =0.01. The preparation method comprises: sintering a ternary cathode material precursor Ni1-x-yCoxAly(OH)2+y;adding a lithium source and a doping material into the sintering resultant, and carrying out sintering; performing tertiary sintering to obtain the target product. The Mg-doped nickel-cobalt-aluminumternary cathode material prepared herein has good cycle performance. The preparation method having the triple sintering steps has simple technicality and controllable process and facilitates industrial large-scale production.
Owner:苏州林奈新能源有限公司 +1
Ti-doped nickel-cobalt-aluminum ternary lithium ion battery positive pole material and preparation method and use thereof
InactiveCN108321381AImprove structural stabilityImprove electrochemical performanceCell electrodesSecondary cellsTi dopingLithium-ion battery
The invention provides a Ti-doped nickel-cobalt-aluminum ternary lithium ion battery positive pole material and a preparation method and use thereof. The material has a chemical formula of (LiaNi1-x-yCoxAly)1-bTibO2, x)0, y)0, 1-x-y)0, wherein a is greater than or equal to 1 and less than or equal to 1.1 and b is greater than 0 and less than or equal to 0.01. The preparation method comprises sintering a ternary positive electrode material precursor Ni1-x-yCoxAly(OH)2+y, adding a lithium source and a doping material into the sintering product, carrying out sintering and carrying out ternary sintering to obtain a desired product. The Ti-doped nickel-cobalt-aluminum ternary lithium ion battery positive pole material has excellent cycle performances. The preparation method comprises three sintering steps, has simple processes, is easy to control and is suitable for industrial production.
Owner:苏州林奈新能源有限公司 +1
Modified high-nickel positive electrode material and preparation method thereof
PendingCN111606363AEasy to processImprove structural stabilityCell electrodesSecondary cellsHigh volume manufacturingElectrical battery
A preparation method of a modified high-nickel positive electrode material comprises the following steps: uniformly mixing a high-nickel positive electrode material precursor, an additive and a lithium source, carrying out primary sintering in an oxygen atmosphere, crushing, and sieving to obtain a primary sintered high-nickel positive electrode material; washing the primary sintered high-nickel positive electrode material with water, and drying to obtain a washed and dried primary sintered high-nickel positive electrode material; performing primary surface treatment on the washed and dried primary sintered high-nickel positive electrode material to obtain a primary surface treated high-nickel positive electrode material; and uniformly mixing the modifier with the primary surface treatmenthigh-nickel positive electrode material, and then carrying out secondary surface treatment to obtain the modified high-nickel positive electrode material. The residual alkali amount on the surface ofthe material and the specific surface area of a final product are reduced, so that the impedance on the surface of the material is obviously reduced, the gas production phenomenon of the battery is obviously relieved, the structural stability and the cycling stability of the material are improved, the processability of the positive electrode material in the preparation process can be improved, the preparation condition is easy to control, and mass production can be realized.
Owner:SHAANXI COAL & CHEM TECH INST
High-nickel ternary positive electrode material, and preparation method and application thereof
InactiveCN110790323AReduce surface residual alkaliEasy to processCell electrodesSecondary cellsElectrical batteryLithium-ion battery
The invention discloses a high-nickel ternary positive electrode material, and a preparation method and application thereof. The preparation method of the high-nickel ternary positive electrode material comprises the steps of primary sintering, water washing, drying, coating, secondary sintering, sieving, demagnetizing and packaging, wherein water washing, drying, coating, sieving, demagnetizing and packaging are completed in a drying room, a moisture content of the drying room is smaller than or equal to 10 ppm, and a carbon dioxide content of the drying room is smaller than or equal to 10 ppm. The control of H2O and CO2 in the air is added in the production process, and the steps of water washing, drying, coating, sieving, demagnetizing and packaging are all completed in the drying room,so the contact between the produced high-nickel ternary positive electrode material and H2O and CO2 is avoided; and after residual lithium is reduced after the high-nickel ternary positive electrodematerial is washed with water, reaction with carbon dioxide rarely occurs, so the residual lithium is ensured not to increase, and thus, the content of residual alkali on the surface of the high-nickel ternary positive electrode material is reduced, the surface residual alkali content is kept to be less than or equal to 0.12%, the processability and safety of the material are improved, and the high-nickel ternary positive electrode material can be widely applied to preparation of electrode materials of lithium ion batteries.
Owner:乳源东阳光新能源材料有限公司
Ternary positive electrode composite material and preparation method and application thereof
ActiveCN111092210AReduce surface residual alkaliImprove electronic conductivityCell electrodesGrapheneConductive polymerPolyvinyl alcohol
The invention discloses a ternary positive electrode composite material and a preparation method and application thereof. The composite material comprises a ternary positive electrode material core and a shell coating the surface of the core, and the shell comprises a first coating material and a second coating material; the first coating is of a three-dimensional nano-network layered structure and comprises a conductive polymer / graphene / carbon nanotube compound, a hydrogen-containing lithium titanium oxide compound and FeF3(H2O)0.33, the hydrogen-containing lithium titanium oxide compound andthe FeF3 (H2O) 0.33 are dispersed on the surface of the compound in situ, and the second coating material is a carbonization product of polyvinyl alcohol. The lithium ion battery prepared from the ternary positive electrode composite material has relatively high ionic conductivity and electronic conductivity, and has the outstanding advantages of high specific discharge capacity, high initial coulombic efficiency, high cycling stability and the like.
Owner:LANGFANG GREEN IND TECH CENT +1
Nickel-cobalt-aluminum ternary lithium ion battery anode material, preparation method therefor and application thereof, and lithium ion battery
PendingCN110896674AImprove structural stabilityHigh capacity retentionNegative electrodesPositive electrodesPhysical chemistryBattery cell
Owner:FACTORIAL INC
Lithium battery positive electrode material and conductive additive
InactiveCN108270010AGood chemical stabilityImprove surface activityCell electrodesSecondary cells servicing/maintenanceWettingSurface tension
The invention provides a lithium battery positive electrode material containing a fluorine-containing alkyl compound additive and / or a weak acid additive. The fluorine-containing alkyl compound additive has a very high chemical stability and maintains a good surface activity in a solvent. A small amount of the fluorine-containing alkyl compound additive is added to a positive electrode material inorder to reduce the surface tension of a solvent-based system, so the wetting property, the dispersing property, the leveling property and other surface properties of the positive electrode materialare enhanced, the diffusion of lithium is facilitated, and the rate performance is improved. The addition of the weak acid additive can reduce the amount of residual alkalis on the surface of the positive electrode material. Additionally, the fluorine-containing alkyl compound additive has hydrophobic properties, so the waterproof property of the positive electrode material is improved, the requirements for the humidity of the storage and use environment of the positive electrode material are reduced, and the cost is saved.
Owner:ZHENJIANG YINENG NEW ENERGY MATERIAL TECH CO LTD
Preparation method and application of spinel structure and layered structure cobalt-free composite material
ActiveCN112133917AIsolated contactImproved magnification performanceSecondary cellsPositive electrodesManganeseVitreous Bodies
The invention discloses a preparation method of a spinel structure and layered structure cobalt-free composite material. The preparation method comprises the following steps of: firstly, coating the surface of a cobalt-free ternary material with a layer of 5V spinel nickel-manganese material through processes of sanding, spray drying, high temperature and the like, and then coating the outermost layer of the cobalt-free ternary material with a substance with glass characteristics and a metal oxide in a composite manner through a low-temperature coating process. By adding the vitreous body substance and the oxide for composite coating, the binding force of the vitreous body substance with the oxide and the ternary material is improved at low temperature by utilizing the fusibility of the vitreous body substance at low temperature, and meanwhile, relatively high specific capacity is ensured.
Owner:TIANJIN B&M SCI & TECH
Doped nickel-cobalt-aluminum ternary lithium-ion battery positive electrode material as well as preparation method and application
InactiveCN108461750AImprove structural stabilityImprove electrochemical performanceCell electrodesSecondary cellsLithium-ion batteryCobalt
The invention provides a doped nickel-cobalt-aluminum ternary lithium-ion battery positive electrode material as well as a preparation method and application. A chemical formula of the material is asfollows: (LiaNi1-x-yCoxAly)1-bMbO2, wherein x is greater than 0 and y is greater than 0; the 1-x-y is greater than 0; the a is greater than or equal to 1 and less than or equal to 1.1; the b is greater than 0 and less than or equal to 0.01. A preparation method of the material comprises the following steps: firstly, sintering a ternary positive electrode material precursor Ni1-x-yCoxAly(OH)2+y; then adding a sintered product into a lithium source and a doping material and sintering; finally, carrying out third-time sintering to obtain a target product. The doped nickel-cobalt-aluminum ternarylithium-ion battery positive electrode material synthesized by the preparation method provided by the invention has good circulating performance. The preparation method provided by the invention comprises three times of sintering steps and has the advantages of simple technology, controllable process and easiness for industrialized mass production.
Owner:苏州林奈新能源有限公司 +1
High-nickel positive electrode material, preparation method thereof and lithium ion secondary battery
ActiveCN112382741AReduce surface residual alkaliImprove thermal stabilityElectrode thermal treatmentSecondary cellsPhosphoric acidCyclic stability
The invention relates to the field of positive electrode materials, and provides a high-nickel positive electrode material, a preparation method thereof, and a lithium ion secondary battery. The high-nickel positive electrode material comprises secondary particles, wherein the secondary particles comprise a plurality of primary particles, the primary particles comprise an active substance, the general chemical formula of the active substance is LibNixCoyMzNwO2, 0.95 <=b <=1.05, 0.8 <=x < 1, 0<y+z<=0.2, x+y+z=1, 0.0001<=w<=0.003, M is selected from at least one of Mn and Al, and N is a metal; acoating layer which comprises a first coating layer and a second coating layer, wherein the first coating layer is formed on the surface of the primary particle, the second coating layer is formed onthe surface of the secondary particle, and each of the first coating layer and the second coating layer contains a phosphoric acid compound. According to the high-nickel positive electrode material,the preparation method thereof and the lithium ion secondary battery, the cost is low, large-scale production can be realized, and the rate capability and the cycling stability of the lithium batterycan be effectively improved.
Owner:SHENZHEN CITY BATTERY NANOMETER TECH
Preparation method of low moisture absorption and low gas production lithium titanate anode material
ActiveCN107808953ALower pHSmall water absorptionCell electrodesSecondary cellsLithiumPhysical chemistry
The invention discloses a preparation method of a low moisture absorption and low gas production lithium titanate anode material. The method includes the steps of: preparing a titanium source and a lithium salt into a lithium titanate precursor by hydrothermal process, performing cooling, then conducting cleaning, and then subjecting the lithium titanate precursor to high temperature calcinationstreatment to obtain lithium titanate powder; dissolving lithium titanate powder in deionized water to form a lithium titanate solution, then adding a PVP (polyvinylpyrrolidone) water solution, and conducting mixing and heating to carry out coating reaction on lithium titanate and PVP in a liquid phase; and performing vacuum drying on the reactant so as to obtain a PVP coated lithium titanate material. The lithium titanate powder material prepared by hydrothermal process lowers the pH value of lithium titanate from the raw material end, thereby weakens the material water absorption, and can effectively inhibits gas production. Then PVP is employed to perform surface film coating on lithium titanate, thus lowering the lithium titanate surface residue and weakening the catalytic effect of Ti<4+> on an electrolyte solution, and preventing the electrolyte solution from being reduced and decomposed on the lithium titanate surface to produce gas.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Composition, preparation method and application of composition to ion battery positive electrode material
InactiveCN109904414ARaw materials are easy to getThe process is simple and reliableCell electrodesLi-accumulatorsManganateCharge discharge
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a composition, a preparation method and an application of the composition to an ion battery positiveelectrode material. The composition comprises nickel cobalt lithium manganate, nano-sol and a liquid-phase solvent, wherein the nano-sol is selected from one or more of nano-aluminum sol, nano-titanium sol, nano-silicon sol, nano-yttrium sol, nano-silicon aluminum sol and nano-silicon zirconium sol; and the pH value of the nano-sol is less than 7. The invention also provides the preparation methodof the composition, and an application of the composition or a product obtained by the preparation method to the lithium ion battery positive electrode material. The preparation method is simple andconvenient, and the raw materials are low in price and easy to obtain; after the battery is prepared, a charge-discharge cycle test is carried out, and the first effect and the 100-cycle capacity retention rate are both superior to those of a reference substance; and the technical defects that in the prior art, a coating technology of the nickel cobalt lithium manganate positive electrode materialis complex in process and high in cost are overcome.
Owner:深圳新恒业电池科技有限公司
Positive electrode slurry and application thereof
ActiveCN112510192AEasy to operateEasy to industrializePositive electrodesSecondary cells servicing/maintenanceOXALIC ACID DIHYDRATEElectrical battery
The invention relates to a positive electrode slurry and an application thereof, the positive electrode slurry comprises a high-nickel positive electrode material and an additive, and the additive comprises at least one of LiPF6, boric acid, oxalic acid, citric acid, tartaric acid, tetraethyl silicate, LiPO2F2 and HPF6; the additive can react with residual alkali on the surface of a high-nickel positive electrode material to reduce the alkalinity of positive electrode slurry and improve the stability and processability of the positive electrode slurry, so that the gas production of a battery prepared from the additive in the use process is reduced, the safety of the battery is improved, the application of the waterless high-nickel positive electrode material is facilitated, and the cost ofthe battery is reduced; meanwhile, the preparation process of the positive electrode slurry is simple to operate, and industrialization is easy to realize.
Owner:EVE ENERGY CO LTD
Al-doping nickel-cobalt-aluminum ternary lithium ion battery positive electrode material as well as preparation method and purpose thereof
InactiveCN108461738AImprove structural stabilityHigh capacity retentionCell electrodesSecondary cellsLithium-ion batteryCobalt
The invention provides an Al-doping nickel-cobalt-aluminum ternary lithium ion battery positive electrode material as well as a preparation method and a purpose thereof. The material has a chemical formula of (LiaNi1-x-yCoxAly)1-bAlbO2, wherein the x is greater than 0; the y is greater than 0; 1-x-y is greater than 0; the a is greater than or equal to 1 but smaller than or equal to 1.1; the b is greater than 0 but smaller than or equal to 0.01. According to the preparation method of the material, firstly, a three-ingredient positive electrode material precursor Ni1-x-yCoxAly(OH)2+y is sintered; then, a lithium source and doping materials are added into the obtained materials after the sintering; sintering is performed; finally, the third time sintering is performed; target products are obtained. The doping nickel-cobalt-aluminum ternary lithium ion battery positive electrode material synthesized by the preparation method has excellent circulation performance. The preparation method comprises three times sintering steps; the process is simple; the process is controllable; the industrial mass production is easy.
Owner:苏州林奈新能源有限公司 +1
Monocrystal ternary positive electrode material, preparation method and battery
PendingCN113363493AImprove conductivityExacerbated interface deteriorationSecondary cellsPositive electrodesPhysical chemistrySingle crystal
The invention provides a single-crystal ternary positive electrode material, a preparation method and a battery. The preparation method comprises the following steps of: mixing a ternary precursor and a lithium source, and performing primary sintering to obtain a primary sintered product; and mixing the primary sintered product, a conductive agent and a lithium source, and carrying out secondary sintering to obtain the single-crystal ternary positive electrode material. According to the invention, by regulating and controlling the addition amount of the conductive agent and the sintering temperature in the secondary sintering process, the conductivity of the single crystal ternary positive electrode material is improved, and the residual alkali on the surface of the material is reduced.
Owner:EVE ENERGY CO LTD
Preparation method of zirconium-doped cerium fluoride coated nickel-cobalt-manganese ternary positive electrode material and prepared positive electrode material
PendingCN114122380AIncrease intrinsic conductivityImprove electrochemical performanceCell electrodesManganeseZirconium doping
The invention discloses a preparation method of a zirconium-doped cerium fluoride-coated nickel-cobalt-manganese ternary positive electrode material, and relates to the technical field of lithium ion positive electrode materials, and the preparation method comprises the following steps: (1) ball-milling and mixing a nickel-cobalt-manganese hydroxide precursor, a lithium source and a zirconium source, and sintering to obtain the zirconium-doped nickel-cobalt-manganese ternary positive electrode material; and (2) mixing a cerium salt solution with the zirconium-doped nickel-cobalt-manganese ternary positive electrode material in the step (1), stirring, adding an ammonium fluoride solution, reacting, drying, and calcining to obtain the zirconium-doped cerium fluoride-coated nickel-cobalt-manganese ternary positive electrode material. The preparation method has the beneficial effects that the residual alkali on the surface of the prepared ternary positive electrode material is reduced, and the ternary positive electrode material has high specific discharge capacity and cycle performance and high capacity retention ratio.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
High-nickel multi-element positive electrode material as well as preparation method and application thereof
ActiveCN113903908AReduce surface residual alkaliLattice surface oxygen stability is lowCell electrodesDopantLithium
The invention discloses a high-nickel multi-element positive electrode material as well as a preparation method and application thereof. The preparation method comprises the steps that: a nickel-cobalt-manganese precursor solution added with a metal dopant is obtained, and the precursor solution is condensed to obtain precursor particles; the precursor particles are in contact with sprayed lithium source powder, aggregated secondary particles are obtained through crystallization, and the secondary particles and a surface coating additive are mixed, and the mixture is sintered, and the high-nickel multi-element positive electrode material is prepared. According to the preparation method, the synthesis of the precursor and the sintering of the secondary particles are completed in the same equipment, so that the cost is reduced, the influence of external environment on the surface property of the high-nickel material is avoided, the obtained high-nickel multi-element positive electrode material has excellent cycle performance and good structural stability, and the problem of high-temperature gas production is solved.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Preparation method and application of a spinel structure and layered structure cobalt-free composite material
ActiveCN112133917BIsolated contactImproved magnification performanceSecondary cellsPositive electrodesOxide compositeManganese
The invention discloses a method for preparing a cobalt-free composite material with a spinel structure and a layered structure. It includes the following steps: first, a layer of 5V spinel nickel-manganese material is coated on the surface of the cobalt-free ternary material through sand grinding, spray drying and high temperature processes, and then the outermost layer is compound coated with glass through the low temperature coating process. Properties of substances and metal oxides. In the present invention, by adding vitreous substance and oxide composite coating, utilizing the meltability of vitreous substance at low temperature, the binding force with oxide and ternary material is improved at low temperature, and at the same time, a higher specific capacity is ensured.
Owner:TIANJIN B&M SCI & TECH
A kind of ternary cathode material and preparation method thereof
ActiveCN110040791BReduce surface residual alkaliReduce residual alkali contentSecondary cellsPositive electrodesElectric capacityPhysical chemistry
The invention provides a ternary cathode material and a preparation method thereof. The preparation method comprises: using an ultrafine particle generator to process the citric acid aqueous solution of soluble salts into ultrafine particles, that is, the treatment liquid of the ternary positive electrode material; The materials are mixed, processed for 1min-20min, dried and sintered to obtain the ternary positive electrode material. The ternary positive electrode material obtained by the preparation method of the invention has low residual alkali content on the surface and high electric capacity at the same time.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
A kind of nickel-cobalt-aluminum positive electrode material coated with carbon/lithium manganese iron phosphate fiber wire and praseodymium oxide double layer and preparation method thereof
ActiveCN110518200BClose contactEven contactSecondary cellsPositive electrodesElectrolytic agentFiber
Owner:乳源东阳光新能源材料有限公司 +1
Lithium-ion battery positive electrode material and preparation method thereof, lithium-ion battery positive electrode, lithium-ion battery and electrical equipment
ActiveCN110890542BLow melting pointReduce surface residual alkaliSecondary cellsPositive electrodesOxalateElectrical battery
Owner:SOUNDON NEW ENERGY TECH CO LTD
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