154results about "Alkali titanates" patented technology

The invention discloses sodium titanate with a layered crystal structure, a preparation method of the sodium titanate and application of the sodium titanate in a water-based magnesium ion battery, and belongs to the technical field of water-based magnesium ion batteries. According to the invention, the sodium titanate with a layered crystal structure is used as the negative electrode material of the aqueous magnesium ion battery, and due to excellent chemical and structural stability, the sodium titanate can realize reversible Mg < 2 + > intercalation / deintercalation in an aqueous magnesium electrolyte. According to the invention, Na2Ti2O5 and Na2Ti3O7 materials are synthesized by a hydrothermal method and a high-temperature annealing process. In a magnesium chloride electrolyte, the two sodium titanate materials both show extremely low charge and discharge potentials (Na2Ti2O5,-1.3 to-0.6 V vs.SCE; sCE (-1.5 to-1 V vs.SCE) and relatively good cycling stability are achieved. In addition, the charge-discharge specific capacity of the Na2Ti2O5 half cell under the current density of 2A / g is up to 213mAh / g, and the high specific capacity of 150mAh / g is still kept under the high current density of 10A / g. The sodium titanate is an ideal aqueous magnesium battery negative electrode material, has the advantages of low cost and environmental friendliness, and has a great application prospect in the field of aqueous magnesium ion energy storage.

The invention provides a composite negative electrode material, a preparation method thereof and a lithium ion battery. The preparation method comprises the following steps: S1, preparing a carbon source and graphite particles into first slurry, and performing first drying and first calcining on the first slurry to obtain a first precursor; s2, preparing a titanium source and the first precursor into second slurry, and performing first reaction and second drying on the second slurry to obtain a second precursor; and S3, preparing a niobium source, a lithium source and the second precursor into third slurry, and carrying out second reaction and second calcination on the third slurry to obtain the composite negative electrode material. Through specific process conditions, the structure for preparing the composite negative electrode material is designed, so that the composite negative electrode material has the graphite core, the carbon layer and the inorganic conductive layer are sequentially formed on the surface of the composite negative electrode material, and the obtained structure can remarkably improve the cycling stability and the electrochemical performance of the composite negative electrode material, so that the service life of a battery is prolonged.

This invention provides a titanium-layer-constructed, synergistic low-eutectic salt regenerated waste lithium nickel cobalt manganese oxide cathode material. The preparation method includes the following steps: cutting the electrode sheet and placing it in an N-methylpyrrolidone solution, ultrasonically dissolving, filtering, washing, drying, and sieving to obtain the waste lithium nickel cobalt manganese oxide material; mixing the obtained waste lithium nickel cobalt manganese oxide cathode material with a titanium source, then adding a lithium source and mixing evenly to obtain a composite material; sintering the composite material in a two-stage process under an oxidizing atmosphere, cooling to room temperature, to obtain the regenerated waste lithium nickel cobalt manganese oxide cathode material with lithium replenishment and repair. The resulting material has a core-shell coated structure, with a lithium metatitanate layer as the coating layer and a titanium-doped lithium nickel cobalt manganese oxide core. The regenerated material exhibits uniform doping and coating, excellent rate performance, and significantly improved charge / discharge capacity and cycle stability.

The invention discloses a three-site co-doped lithium titanate carbon-coated material and a preparation method and application thereof.The lithium titanate carbon-coated material comprises a carbon-coated material, a lithium titanate material and anions and cations doped in the lithium titanate material, a titanium source is dissolved in a solution containing the carbon-coated material, a lithium source, a doped potassium source, an aluminum source and a fluorine source are added, and the mixture is stirred to be uniform; sequentially heating and stirring, drying, grinding and sintering at high temperature. According to the invention, lithium, titanium and oxygen sites in the lithium titanate material are replaced by co-doping trace potassium, aluminum and fluorine, so that the electronic conductivity of the surface of the material is effectively improved, the synergistic effect of doped anions and cations can induce and improve the internal characteristics of the material, and as the negative electrode material of the lithium ion battery, the cycling stability of the material in the organic lithium ion battery can be improved; and the device is high in safety and is used for energy storage equipment, backup power supplies, reserve power supplies and the like.

The invention discloses a modified lithium titanate negative electrode material and a preparation method thereof, a negative electrode plate, a battery and an electric device, and belongs to the field of energy and the field of new materials. The preparation method of the modified lithium titanate negative electrode material comprises the following steps: carrying out first reaction on lithium salt and first glacial acetic acid in a first solvent to prepare a lithium acetate solution; zirconium salt and second glacial acetic acid are subjected to first mixing in a second solvent, and a zirconium salt solution is formed; performing second mixing on the lithium acetate solution and the zirconium salt solution to form a lithium-zirconium mixed solution; performing third mixing on the lithium-zirconium mixed solution and a titanium source to form lithium-titanium-zirconium sol; and drying and calcining the lithium-titanium-zirconium sol to form the modified lithium titanate negative electrode material. According to the preparation method, the zirconium element is adopted for doping, meanwhile, a homogeneous phase mixing reaction process is matched, and a high-energy grinding process is not needed, so that uniform mixing of the raw materials on the molecular level can be realized, the high-rate charge-discharge capacity and the first efficiency are improved, and the probability of gas production of the battery is reduced.

The invention belongs to material science and chemical engineering, and particularly relates to a titanium lithium ion sieve based on illumination assistance, a synthesis method and application. A synthesis method of a titanium lithium ion sieve based on illumination assistance comprises the following steps: S1, mixing and dissolving a titanium source and a lithium source in a solvent, grinding to obtain a mixture, drying the mixture, and heating in an air atmosphere to obtain a metatitanic acid and orthotitanic acid composite material precursor; and S2, adding a solvent and a metal source into the metatitanic acid and orthotitanic acid composite material precursor in the S1, grinding, drying to obtain mixed powder, heating the powder to obtain a metal source doped orthotitanic acid and metatitanic acid composite material, and soaking the metal source doped orthotitanic acid and metatitanic acid composite material in an acid solution to obtain the titanium lithium ion sieve.

In a titanium oxide powder of this invention, a ratio (IA / IR) of a peak intensity (IA) of anatase-type crystals to a peak intensity (IR) of rutile-type crystals as measured by X-ray diffractometry is 0.1 or less; particles contained in the powder have an average short-axis length from 10 to 50 nm and an average aspect ratio from 1 to 3; a ratio (A450 / A320) of an absorbance A450 at a wavelength of 450 nm to an absorbance A320 at a wavelength of 320 nm is from 0.015 to 0.5; and the powder contains a nitrogen atom and a peak derived from the nitrogen atom is observed from 395 to 402 eV in ESCA (Electron Spectroscopy for Chemical Analysis) measurement. A titanium oxide powder is thus provided that contains rutile-type crystals as a main component and has an excellent UVA shielding effect, high safety for the human body, and good color tone.

A titanium-containing oxide powder which is mainly composed of a titanium-containing oxide represented by Li4Ti5O12 or Ti1-X / 2Nb2O7-X (wherein 0 ≤ X < 2), and which is characterized by containing particles of the titanium-containing oxide and a solvation ionic liquid that is composed of an Li salt and an organic solvent.

This invention discloses a type of sodium titanate with a layered crystal structure, its preparation method, and its application in aqueous magnesium-ion batteries, belonging to the field of aqueous magnesium-ion battery technology. This invention uses sodium titanate with a layered crystal structure as the negative electrode material in aqueous magnesium-ion batteries. Due to its excellent chemical and structural stability, sodium titanate can achieve reversible magnesium deposition in aqueous magnesium electrolytes. 2+ Intercalation / extraction. This invention synthesizes Na via a hydrothermal method and a high-temperature annealing process. 2 Ti 2 O 5 And Na 2 Ti 3 O 7 Materials. In magnesium chloride electrolyte, both sodium titanate materials exhibit extremely low charge / discharge potentials (Na). 2 Ti 2 O 5 -1.3 to -0.6V vs. SCE; Na 2 Ti 3 O 7 (-1.5 to -1V vs. SCE) and good cycle stability. Furthermore, Na... 2 Ti 2 O 5 The half-cell exhibits a charge-discharge specific capacity of up to 213 mAh / g at a current density of 2 A / g, and maintains a high specific capacity of 150 mAh / g even at a high current density of 10 A / g. The sodium titanate of this invention is an ideal anode material for aqueous magnesium batteries, possessing both low cost and environmental friendliness, and shows great promise for application in the field of aqueous magnesium-ion energy storage.

The embodiments relate to titanate crystal particle dispersions, methods of making the dispersions, and compositions and uses thereof. The dispersions and compositions containing the dispersions provide a high coverage to the skin and high near infrared / infrared (NIR / IR) reflectance. The dispersions include optionally surface treated titanate crystals used as cosmetic powders, and a cosmetically acceptable dispersing medium. The dispersions may be useful in cosmetic compositions as a foundation and / or as a composition to correct skin discoloration, and may be used protect the skin from sun exposure.

A method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO2 containing embedded A nanoparticles is provided respectively. In this method, a Ti-T alloy with a A-group element solidly dissolved therein is used as a titanium source, and reacted with an alkali solution under a certain condition. In combination with subsequent treatment, the preparation of a titanate nanotube, a titanic acid nanotube, and a TiO2 nanotube / rod containing embedded A nanoparticles, respectively, is further achieved with high efficiency and low cost. Moreover, a method for preparing metal nanoparticles is also provided by removing the matrix of the composites. The present preparation methods is characterized by simple process, easy operation, high efficiency, low cost. The product is of promising application in polymer-based nanocomposites, ceramic materials, catalytic materials, photocatalytic materials, hydrophobic materials, effluent degrading materials, bactericidal coatings, anticorrosive coatings, marine coatings.

The invention discloses a production system of high-flowability moisture-proof sodium potassium titanate, and relates to the technical field of sodium potassium titanate, the production system comprises a pulsed electric field in-situ moisture-proof layer synthesis unit, a multistage cyclone coupling fluidized bed modification unit and a block chain quality closed-loop control unit, the pulsed electric field in-situ moisture-proof layer synthesis unit comprises a nitrogen-protected closed reaction kettle, a high-frequency ultrasonic disperser and a multi-stage pulsed electric field generator, the high-frequency ultrasonic disperser applies a 0.5-20 MHz pulsed electric field, the field intensity of the pulsed electric field is 10-30 kV / cm, the duty ratio of the pulsed electric field is 15%-90%, and the multi-stage pulsed electric field generator is used for generating the moisture-proof layer. The high-frequency ultrasonic disperser enables a nano rare earth silicate composite coating layer to be generated in situ on the surface of sodium potassium titanate particles, the thickness of the nano rare earth silicate composite coating layer is 10-50 microns, the humidity sensitivity of the nano rare earth silicate composite coating layer is 0.1%-0.3%, the multi-stage rotational flow coupling fluidized bed modification unit comprises three stages of fluidized beds which are arranged in series, and the three stages of fluidized beds are connected in parallel. The inclination angle of the inclination-angle-adjustable swirl nozzle array arranged at each stage is 10-60 degrees, and the distance is 1.2-2.5 times of the particle diameter.

The present invention relates to a negative electrode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery comprising same. More specifically, the negative electrode active material comprises one selected from Li1.1Ti0.9O2 and a mixture in which Li1.1Ti0.9O2 and carbon nanotubes (CNTs) are mixed in a weight ratio of 8:2 to 9:1. The negative electrode active material for a lithium secondary battery, comprising the above-described components has an R-3m structure, and provided is a lithium secondary battery which exhibits high capacity and excellent lifespan characteristics, and in particular, exhibits high capacity during high-rate charging and discharging.

The invention relates to the field of separation, and discloses a modified lithium ion sieve and a membrane with a separation function as well as preparation methods and applications thereof. The modified lithium ion sieve comprises a lithium ion sieve and a structure from an isocyanate-based silane coupling agent; wherein relative to the total mass of the modified lithium ion sieve, the mass content of the structure from the isocyanate-based silane coupling agent is 0.8-1.5 wt%. When the modified lithium ion sieve or the membrane is used for realizing magnesium-lithium separation, an obviously higher magnesium-lithium separation coefficient can be obtained, and the membrane also has higher water flux and can provide higher treatment efficiency.

The invention discloses a preparation method of fibrous potassium hexatitanate, which comprises the following steps: uniformly mixing organic amine and a titanium-containing compound, and adding alcohol; heating the mixture, adding a potassium-containing compound in the heating process, and uniformly mixing again; adding a spinning aid into the obtained mixture, and then carrying out microfluidic spinning; finally, a sample obtained after spinning is calcined, and fibrous potassium hexatitanate is finally prepared. The preparation method is simple to operate, short in production period, free of waste acid emission, low in cost, environment-friendly and efficient. The average diameter of the prepared fibrous potassium hexatitanate is larger than or equal to 15 micrometers, the fibrous potassium hexatitanate is in a thick rod shape and uniform in morphology, the mechanical property and stability of the composite material can be remarkably improved, and the fibrous potassium hexatitanate is not prone to being sucked into the human body and entering blood or lymph.

The present invention discloses a preparation method of carbon-modified titanate with a high aspect ratio, which comprises the following steps: attapulgite, starch, orthotitanic acid, a potassium-containing precursor and furfuryl alcohol are mixed, and stirred to enable the starch, orthotitanic acid and potassium-containing precursor to fully immerse into the pores of rod-shaped attapulgite, and drying is carried out at a controlled temperature of 80-100 °C to obtain titanium source / potassium source / carbon source / attapulgite; the titanium source / potassium source / carbon source / attapulgite is put into a crucible, a tube furnace is used as a heating device, and reaction is carried out at 750-900 °C for 90 min, and an inert atmosphere is passed throughout the reaction; after cooling with the furnace, it is centrifugally washed with deionized water, and then dried at 80 °C for 6-8 h to obtain carbon-modified titanate with a high aspect ratio. The carbon-modified potassium hexatitanate with a high aspect ratio based on attapulgite has good fluidity and will not generate fibers during friction, playing a role in increasing strength and wear resistance, so that the friction coefficient of the whole friction material is relatively more stable and the high-temperature recession rate is lower.

Provided are: coated flaky titanic acid particles, which can form a design coating film with a good silky texture and shadowed appearance when flaky titanic acid is applied to an organic solvent-based paint and, which can also sufficiently suppress discoloration (yellowing) of the coating film even in a relatively severe environment, such as prolonged exposure to ultraviolet light; and a production method therefor.　The surface of the flaky titanic acid particles has an oxide and / or hydroxide of aluminum, and an anionic surfactant present thereon. Preferably, the anionic surfactant is a hydrocarbon-based anionic surfactant having 5 or more carbon atoms in the main chain or a fluorinated anionic surfactant having 4 or more carbon atoms. Said production method comprises: a step for maintaining an aqueous slurry, which contains flaky titanic acid particles and an aluminum source, at a temperature of 50-95°C inclusive and at a pH of 5-12 inclusive to treat the surface of the flaky titanic acid particles with an oxide and / or hydroxide of aluminum; and a subsequent step for mixing the obtained flaky titanic acid and an anionic surfactant in a solution.

The present invention provides a composition containing an inorganic solid electrolyte with excellent dispersion stability and handling properties, a sheet for an all-solid-state secondary battery and an all-solid-state secondary battery using the composition containing an inorganic solid electrolyte, and a method for manufacturing the sheet for an all-solid-state secondary battery and the all-solid-state secondary battery. The present invention provides a composition containing an inorganic solid electrolyte, a sheet for an all-solid-state secondary battery and an all-solid-state secondary battery using the composition containing an inorganic solid electrolyte, and a method for manufacturing the sheet for an all-solid-state secondary battery and the all-solid-state secondary battery, wherein the composition containing an inorganic solid electrolyte contains an inorganic solid electrolyte having ionic conductivity of a metal belonging to Group 1 or Group 2 of the periodic table, a polymer binder, and a dispersion medium, wherein the composition containing an inorganic solid electrolyte contains a polymer binder having an adsorption rate of less than 60% relative to the inorganic solid electrolyte in the dispersion medium.

The present invention relates to a lithium-titanium composite oxide comprising primary particles coated with aluminum and a method for preparing the same. The lithium-titanium composite oxide containing primary particles coated with aluminum according to the present invention is characterized in that after the lithium-titanium composite oxide is prepared, re-pulverized particles are mixed with an aluminum compound and then spray-dried to prepare secondary particles, and the primary particles are coated with aluminum. Thus, a battery comprising the lithium-titanium composite oxide comprising primary particles coated with aluminum according to the present invention exhibits an effect of suppressing the generation of gas due to decomposition of an electrolyte and residual lithium caused by titanium ions in a conventional lithium-titanium composite oxide.

This powder includes: first particles having a first crystal composition; and second particles having a second crystal composition different from the first crystal composition, wherein each of the first crystal composition and the second crystal composition includes at least one selected from the group consisting of Ti2O3, γ-Ti3O5, and Ti4O7.

The invention discloses a positive and negative electrode interface cooperative processing method of an LTO-LMFP all-solid-state battery. The method comprises the following steps: preparing a lithium titanate negative electrode material by adopting a solid phase method or a hydrothermal method; mixing the prepared lithium titanate powder with a lithium phosphate precursor according to a certain proportion; after mixing, carrying out heat treatment on the mixture to promote the lithium phosphate to uniformly form a coating layer on the surfaces of the lithium titanate particles; a coprecipitation method or a solid-phase method is adopted to prepare the lithium manganese iron phosphate positive electrode material, so that the interface impedance is obviously reduced, and the physical contact and chemical compatibility between the electrode material and a sulfide solid electrolyte are effectively improved through a lithium phosphate coated lithium titanate negative electrode and a Mg-doped manganese phosphate coated lithium manganese iron phosphate positive electrode. The lithium phosphate and manganese phosphate coating layer is used as an interface buffer layer and can fill interface gaps, increase the effective contact area and provide a more stable ion transmission channel, so that the interface impedance between the positive electrode and the negative electrode and the solid electrolyte is greatly reduced, and rapid migration of lithium ions is promoted.

The present invention relates to a method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO2 containing doping E or embedding E nanoparticles, and the use thereof. By using an E-doped Ti-T intermetallic compound as a titanium source, and reacting the E-doped Ti-T intermetallic compound with alkaline solution at atmospheric pressure and near its boiling-point temperature, an E-doped titanate nanofilm is prepared at atmospheric pressure with high efficiency and in a short time. Through acid treatment and (or) heat treatment, a titanate nanofilm containing embedding E nanoparticles, an E-doped titanic acid nanofilm, and a titanic acid nanofilm and a TiO2 flake powder containing embedding E nanoparticles can be further prepared. Through a subsequent reaction at high temperature and pressure, the preparation of an E-doped titanate nanotubes and titanic acid nanotubes, and titanic acid nanotubes and TiO2 nanotubes / nanorods containing embedding E nanoparticles can be achieved in high efficiency and low-cost.

The invention relates to the field of lithium ion batteries, and discloses low-water-absorption lithium titanate, a preparation method thereof, a negative pole piece, a lithium battery and electric equipment. According to the invention, the specific water-resistant polymer protective layer is added on the surface of the lithium titanate material, so that the adsorption to moisture is reduced, the requirement on the humidity of the environment is reduced, and the lithium titanate battery manufacturing process environment is favorably achieved. The prepared lithium titanate pole piece is coated with the protective film, so that the side reaction between the electrolyte and the pole piece after the battery is manufactured in the later period can be reduced, and the gas production problem of the lithium titanate battery can be relieved. The polymer coated protective film on the surface of the lithium titanate material can form a protective layer similar to an SEI (solid electrolyte interface) film in the subsequent charging and discharging process of the lithium titanate battery, so that the stability of the lithium titanate battery is improved. According to the application of the low-water-absorption lithium titanate, the humidity requirement of the lithium titanate battery manufacturing process can be reduced, the lithium titanate battery manufacturing process achievement rate can be improved, the lithium titanate manufacturing process cost and energy consumption can be reduced, and large-scale manufacturing is easy.

The invention relates to a phosphate positive electrode active material based on green cyclic utilization and a preparation method and application thereof, and belongs to the field of secondary batteries. The invention synthesizes a phosphate positive electrode active material LiFex1Nbx2Mgx3Tix4PO4 / D1D2 based on green cyclic utilization, wherein x < 1 > lt is more than or equal to 0.90; 1, 0 < = x2lt; 0.05, 0 < = x3lt; 0.05, 0 lt; x4lt; 0.05, D1 and D2 are respectively a first conductive coating layer and a second conductive coating layer, the D1 conductive coating layer is a nitrogen-sulfur-boron doped composite carbon layer based on an organic framework, and the D2 conductive coating layer is a fast ion conductor of lithium. The phosphate positive electrode active material based on green cyclic utilization is prepared by using the alkaline sodium borohydride aqueous solution to remove aluminum skimmings and a compounding process, so that the raw material utilization rate is greatly improved, and the environment bearing pressure is greatly reduced. Through the design of the composite doped conductive layer, the cycle stability, the rate capability and the high and low temperature performance of the phosphate-based positive electrode material are greatly improved, and the phosphate-based positive electrode material has a relatively good market prospect.

The solid electrolyte material consists essentially of Li, Ti, M, and F. Here, M is at least one selected from the group consisting of Mg and Ca.

The present invention relates to a lithium-titanium complex oxide, a preparation method thereof, and a lithium secondary battery comprising the same and, more specifically, to a lithium-titanium complex oxide which maintains appropriate pores within particles, and which is prepared by adding a pore inducing material in the wet-milling step to adjust sizes of primary particles of the lithium-titanium complex oxide, a preparation method thereof, and a lithium secondary battery comprising the same. Since a lithium-titanium complex oxide having reduced sizes of primary particles, the lithium-titanium complex oxide according to the present invention shortens a moving distance of lithium ions by adding the pore inducing material, diffusion rate of the lithium ions is increased. Thereby, a battery comprising the lithium-titanium complex oxide according to the present invention exhibits excellent output characteristics by having a structure favorable to electron transport.

The present invention provides a sodium battery positive electrode material, the chemical formula of the sodium battery positive electrode material is xNaMBO3.yNa2Ti3O7.zNa3V2(BO3)3 / C, where the molar ratio of x, y and z is 0.94-0.96:0.02-0.03:0.02-0.03, M is Fe and Mn, the molar ratio of Fe and Mn is 8-9:1-2, and the mass fraction of carbon in the sodium battery positive electrode material is 1.2%-1.5%. The sodium battery positive electrode material provided by the present invention has high capacity, high voltage platform, stable structure, high cycle performance, and its manufacturing method is simple, low cost, and short process flow.

The invention provides a method for preparing lithium titanate by recycling lithium titanate pole pieces, lithium titanate and application of the lithium titanate. The method for preparing lithium titanate by recovering the lithium titanate pole piece comprises the following steps: firstly, carrying out first calcination on the lithium titanate pole piece, carrying out acid leaching by adopting dilute acid with specific concentration, and filtering to obtain acid leaching filtrate and an acid leaching filter cake; then, the pH of the acid leaching filtrate is adjusted, carbonate is added for lithium precipitation, and lithium carbonate is obtained; carrying out secondary calcination on the acid leaching filter cake to obtain titanium dioxide; then, lithium carbonate and titanium dioxide are used as raw materials, and reproduced lithium titanate is prepared. According to the method, lithium titanate in the waste pole piece can be fully recycled, titanium and lithium elements are reused, in addition, mechanical crushing is not adopted, the impurity content in lithium titanate is effectively reduced, dilute acid is adopted for acid leaching, and the method has the advantages that the process is simple and easy to implement, pollution is relatively small, and mass production implementation can be achieved.

The invention relates to a preparation method and application of chromium-doped sodium titanate with high cycle stability, the chromium-doped sodium titanate is formed by solid-phase sintering of Na2CO3, nano TiO2 and Cr2O3, and optimized Cr-Na2Ti3O7 has excellent cycle stability; the preparation method comprises the following steps: taking a certain amount of Na2CO3, nano TiO2 and Cr2O3 in a corresponding proportion, adding a small amount of isopropanol, and carrying out ball milling in a ball milling instrument for 5-8 hours; completely drying in a drying box, and putting the dried product into a tubular furnace; in a closed atmosphere of high-purity argon, carrying out solid-phase sintering for 10-12 hours by adopting a step-by-step calcination method, and naturally cooling to room temperature; when the material is used as a negative electrode of a sodium ion battery, the coordination environment of sodium ions can be changed, an interlayer Ti-O bond is optimized so as to optimize an interlayer structure, the irreversible capacity generated by Na2Ti3O7 in the charge-discharge cycle process is obviously reduced, and the cycle stability and the rate performance of the battery are improved; the preparation method has important significance for developing a high-performance negative electrode material of the sodium-ion battery and improving the performance of the sodium-ion battery.

The invention provides a method for efficiently improving the performance of a nickel ternary material, which comprises the following steps: adding a solution containing aluminum ions into a positive electrode material, grinding, uniformly mixing, heating and calcining in an air atmosphere to obtain a modified high-nickel ternary material, preparing lithium titanate, putting the lithium titanate and the modified high-nickel ternary material into an organic solvent, uniformly mixing, heating, stirring, evaporating to dryness, grinding and sieving to obtain a precursor; and heating the precursor for 1-2 hours at the temperature of 700-800 DEG C in an inert atmosphere, and naturally cooling. According to the method, the high-nickel ternary material is subjected to surface treatment through a solution containing aluminum ions, Li2CO3 and LiOH existing on the surface of the high-nickel material are absorbed to reduce the content of lithium salt impurities in the positive electrode material, alkaline residues on the surface of the electrode material are reduced, and the interface transfer impedance of the electrode material is reduced; and meanwhile, a small amount of lithium metaaluminate is synthesized to coat the surface of the ternary material, so that the cycling stability and thermodynamic property of the high-nickel material are improved.