191 results about "Spray pyrolysis" patented technology

A method of synthesis of single crystal nickel-rich cathode materials can include preparing a precursor solution by dissolving lithium nitrate, nickel nitrate, manganese nitrate, and cobalt nitrate in water, aerosolizing the solution of a) in a stream of air using an ultrasonic sprayer, preheating the resulting droplets, premixing the droplets with methane, decomposing the droplets by passing through a co-flow burner, depositing solid particles on a filter, and calcinating the solid particles in a furnace in oxygen to produce a single crystal cathode material.

The invention belongs to the field of negative electrode materials, and particularly relates to a silicon-graphite composite material, a preparation method and application thereof and a lithium ion battery, the preparation method comprises the following steps: mixing and slurrying silicon powder, graphite and a composite functional additive, and then carrying out ball milling modification to obtain primary composite particles; the composite functional auxiliary agent comprises an auxiliary agent A, an auxiliary agent B and an auxiliary agent C; the primary composite particles and a carbon source liquid phase are compounded and then subjected to spray drying and heat treatment, or spray pyrolysis is directly carried out, and secondary composite particles are prepared; and carrying out modification treatment on the secondary composite particles prepared in the step 2 in a surface modification liquid, and then carrying out low-temperature annealing at 150-300 DEG C to prepare the silicon-graphite composite material. The surface modification liquid is an organic solution in which conductive lithium salt and an auxiliary agent D are dissolved. Based on the combined control of the preparation process and the structure, the silicon-based negative electrode material with ultra-long cycle life and excellent low-temperature fast charging performance can be obtained.

The invention provides a high-nickel ternary precursor based on a spray pyrolysis method as well as a preparation method and application thereof, the preparation method comprises the following steps: performing spray pyrolysis on a high-nickel ternary solution, and atomizing the high-nickel ternary solution by adopting supercritical CO2 to obtain the high-nickel ternary precursor based on the spray pyrolysis method; the high-nickel ternary liquid comprises a surface active agent. According to the preparation method, supercritical CO2 replaces air to serve as atomizing gas for spray pyrolysis, the size of atomized liquid drops is reduced by means of the super diffusivity and zero surface tension characteristics of the supercritical CO2, meanwhile, a surfactant is added into a precursor solution, the problems that the liquid drops are thick and large and the particle size distribution is wide in the traditional spray pyrolysis process are solved, and the preparation method is suitable for large-scale industrial production. And the high-nickel ternary precursor oxide particles with uniform particle size are prepared.

The invention discloses a metal oxide precursor and a preparation method and application thereof. The precursor comprises a nickel element, a manganese element and an element M, and the element M comprises one or more of cobalt and aluminum. The preparation method comprises the steps that a mixed metal salt solution with the total metal ion concentration being 2-5 mol / L is prepared; spraying the mixed metal salt solution into a high-temperature pyrolyzing furnace in an aerial fog form, and carrying out a spray pyrolysis reaction; roasting the spray pyrolysis product for 1-4 hours in an oxygen-containing atmosphere, wherein the roasting temperature is 500-700 DEG C; dispersing the roasted product in an acidic aqueous solution, carrying out hydrothermal reaction at 150-250 DEG C for 1-6 hours, and carrying out filter pressing and washing until the conductivity of filtrate is less than 50 [mu] S / cm; and drying the washed product, and carrying out air jet pulverization to obtain the metal oxide precursor. During application, the metal oxide precursor and a lithium source are mixed and sintered to prepare the ternary positive electrode material. Impurities are removed through low-temperature roasting-acidic hydrothermal combination, the structure is optimized, and the performance of the positive electrode is improved.

The invention discloses a preparation method of a single crystal lithium ion positive electrode material, the positive electrode material and a battery. The preparation method comprises the following steps: dissolving a nickel salt, a cobalt salt, a manganese salt or / and an aluminum salt and an M salt, and mixing to obtain a metal liquid; the molten metal is subjected to spray pyrolysis, and metal oxide is obtained; the method comprises the following steps: crushing and slurrying a metal oxide, adding a lithium salt, grinding, and carrying out spray heat treatment to obtain a lithium-containing precursor; and sintering the lithium-containing precursor at high temperature to obtain the single crystal lithium ion battery positive electrode material. According to the present invention, the lithium and the metal element are mixed at the nanometer level, the lithium diffusion path during sintering is shortened, the single crystal lithium ion positive electrode material obtained after sintering has excellent electrical performance, and the lithium-containing precursor has characteristics of high tap density, large calcining bowl loading amount and low production cost.

The invention discloses a porous-filling type hard carbon material and a preparation method thereof, and relates to the field of battery negative electrode material preparation, resin is dissolved in water, metal salt is added, after dissolving and uniform mixing, spray pyrolysis is carried out to obtain mixture powder, then primary carbonization is carried out, then the mixture powder is washed with dilute nitric acid and dried, and porous hard carbon is obtained; dissolving cane sugar in water, adding the porous hard carbon powder, uniformly mixing, carrying out hydrothermal treatment, drying the turbid liquid, and carrying out secondary carbonization so as to fill pores in the outer layer of the porous hard carbon and increase sodium storage sites; according to the porous-filling type hard carbon material and the preparation method thereof, sucrose filled in pores of the porous hard carbon is pyrolyzed and shrunk through secondary carbonization to leave more pore channels for ion transmission, and the porous characteristic of the porous-filling type hard carbon material is enhanced by increasing ion diffusion channels, so that electrolyte permeation is promoted; the contact area of the electrolyte and the hard carbon material is increased, the rate capability of the material is improved, and the initial coulombic efficiency is enhanced.

The invention provides a process for preparing a urea electrocatalyst through spray pyrolysis and synthesizing urea. The CuAg1Ru1 diatomic urea electrocatalyst prepared by a spray pyrolysis process can simultaneously perform C-N coupling and protonation tandem catalytic reaction of * CO2NH2, Ag1-Cu and Ru1-Cu sites synergistically promote UENC through a tandem catalytic mechanism, the Ag1-Cu site triggers C-N coupling and promotes the step from * CO2NH2 to * CO2NH, the Ru1-Cu site promotes the subsequent protonation step from * CO2NH2 to * COOHNH2, and the CuAg1Ru1 diatomic urea electrocatalyst has the advantages of simple preparation process, low cost and high efficiency. Three active sites of Ag, Ru and Cu exist in the whole catalytic process, the hydrogen evolution competitive reaction is effectively reduced in the reaction process, and the Faraday efficiency and the urea yield are effectively improved. The urea synthesis process provided by the invention is simple and environment-friendly, CO2 in air and NO3 <-> in sewage are used as raw materials in the urea synthesis process, and the national double-carbon policy is effectively met.

A method of synthesis of aluminum-doped Li6.25Al0.25La3Zr2O12 (Al-LLZO) can include preparing a precursor solution by dissolving lithium nitrate, aluminum nitrate, zirconium (IV) oxynitrate, and lanthanum nitrate in stoichiometric amounts according to the composition Li6.25Al0.25La3Zr2O12 in water, and decomposing droplets by passing through a co-flow burner. Also disclosed is a method of produce producing a thin-tape comprising Al-LLZO.

The invention relates to a host material for an electrode of a lithium-sulfur battery and a preparation method of the host material. According to the invention, a template is constructed by using a spray pyrolysis process, and the host material for the electrode of the lithium-sulfur battery is finally obtained, and is element-doped graphdiyne with a hollow multi-shell structure. The graphdiyne with a hollow multi-shell structure is doped by doping agents such as a boron source, a nitrogen source, a phosphorus source and a sulfur source, and due to introduction of doping elements, the graphdiyne material has high catalytic activity, can be used for catalyzing oxidation reduction of sulfur species, is beneficial to adsorption of polysulfide and limits the shuttle effect. Through the synergistic effect of the two, the performance of the lithium-sulfur battery can be further improved, and the comprehensive improvement of the energy density, the cycling stability and the rate capability of the lithium-sulfur battery is realized.

The invention belongs to the technical field of sodium-ion batteries, and particularly relates to an iron-manganese-based sodium-ion battery positive electrode material as well as a preparation method and application thereof. The preparation method of the iron-manganese-based sodium ion battery positive electrode material comprises the following steps: adding ferric nitrate and manganese nitrate into water for dissolving, performing spray pyrolysis to obtain an iron-manganese oxide precursor, performing ball-milling mixing on sodium carbonate, the iron-manganese oxide precursor and lanthanum telluride, and calcining in an inert gas atmosphere to obtain a composite material; and adding Ni4O4 cubic alkane modified carbazole, the composite material and manganese dioxide into dilute sulphuric acid for ultrasonic dispersion, stirring for reaction, centrifuging, washing and drying to obtain the iron-manganese-based sodium ion positive electrode material. The iron-manganese-based sodium ion battery positive electrode material provided by the invention has the advantages of stable rate cycle, high specific capacity and excellent capacity retention rate.

This invention discloses a process for preparing ultrafine glass powder using a spray pyrolysis method in the field of glass encapsulation materials. The process first prepares a homogeneous solution A using boric acid, aluminum nitrate nonahydrate, alkaline earth metal nitrates, lithium acetate, sodium acetate, and potassium acetate. Tetraethyl orthosilicate is dissolved in anhydrous ethanol to obtain solution B. A rare earth transition metal composite oxide nanoclusters encapsulated with a silica shell hybrid inorganic modifier is dispersed in anhydrous ethanol to obtain suspension C. Solution B and suspension C are mixed, and deionized water and hydrochloric acid are added to adjust the pH. After pre-hydrolysis and cooling, triethyl borate is added dropwise for co-condensation, and then mixed with solution A. After adjusting the pH and aging, the mixture is ultrasonically atomized and spray pyrolyzed to obtain ultrafine glass powder. The glass powder obtained by this invention has small particle size, high sphericity, and can be continuously produced.

The invention discloses a nano cerium oxide composite proton exchange membrane and a preparation method and application thereof.The preparation method comprises the following steps that after a soluble cerium salt solution is sprayed and atomized, pyrolysis is conducted under the oxidizing atmosphere, and nano cerium oxide particles are prepared; then adding into a perfluorosulfonic acid resin solution, adjusting the pH value to be alkaline, and stirring to prepare a composite resin solution; and casting, drying to form a film, and carrying out heat treatment. Compared with the nano cerium oxide particles prepared by the traditional sol-gel method, the nano cerium oxide particles prepared by the spray pyrolysis method are more easily and uniformly dispersed in the perfluorosulfonic acid resin matrix and are not easy to agglomerate, and the basic structure of the perfluorosulfonic acid is maintained after the film is formed. Meanwhile, nano cerium oxide particles are dispersed in a perfluorosulfonic acid resin solution under an alkaline condition, so that the chemical stability and durability of the composite proton exchange membrane are improved, and the proton conductivity of the composite proton exchange membrane is improved.

The invention provides a preparation method of a ternary precursor, a ternary positive electrode material and a preparation method of the ternary positive electrode material, and the preparation method of the ternary precursor comprises the following steps: uniformly mixing a ternary metal salt solution and a chelating agent, carrying out spray pyrolysis on the obtained mixed solution, and sequentially passing through three temperature zones from top to bottom to obtain the ternary precursor. According to the preparation method disclosed by the invention, the chelating agent is added into the ternary metal salt solution as an additive, and spray pyrolysis sequentially passes through three temperature zones from top to bottom, so that the problem of hollowing or crushing of secondary particles is solved; the preparation of the solid spheroidic secondary particle precursor with narrow particle size distribution by a ternary metal salt system spray pyrolysis method can be realized.

The present invention discloses a sodium ion battery hard carbon material, a preparation method thereof, and a sodium ion battery using the hard carbon material. The hard carbon material is a composite porous material inlaid with hollow porous spheres and porous carbon sheets. Compared with the prior art, the advantages of the present invention are: a method for preparing sodium ion hard carbon materials from concentrated papermaking black liquor in a short process using spray pyrolysis, using spray pyrolysis to construct a precursor material with a hollow porous spherical structure; using an aqueous solution to collect the precursor material, and removing impurities through solid-liquid separation and washing; and then further regulating the microstructure of the carbon material through two-stage heat treatment to obtain a hard carbon negative electrode material with high specific capacity, excellent rate performance, and cycle stability. Using the hard carbon material as the negative electrode, a high-energy-density sodium ion battery is prepared.

This invention relates to a bimodal tungsten-copper alloy and its preparation method. The preparation method includes: using water-soluble tungsten salt, water-soluble copper salt, and coarse tungsten powder with controllable particle size as raw materials, adding a solvent to prepare a suspension; subjecting the suspension to spray pyrolysis and in-situ reduction reaction to obtain tungsten-copper composite powder; and finally pressing the tungsten-copper composite powder into a green blank and sintering it to obtain a tungsten-copper alloy material with bimodal tungsten grain structure. In the tungsten-copper composite powder prepared by this invention, fine tungsten powder and copper powder are coupled to each other and uniformly distributed on the surface of coarse tungsten powder, forming a structure in which fine tungsten-copper composite powder coats coarse tungsten powder. This effectively improves the uniformity of W and Cu element distribution, thereby enhancing the overall properties of the tungsten-copper alloy, such as density, electrical conductivity, and thermal conductivity.

The present disclosure relates to a kind of ferric phosphate and its preparation method and use, the preparation method includes the following steps: (1) mixing ammonium ferrocyanide and phosphorus source, obtain iron-phosphorus mixed solution;(2) the iron-phosphorus mixed solution obtained in step (1) is carried out spray pyrolysis, obtain solid particles;(3) the solid particles obtained in step (2) are broken, obtain ferric phosphate.The ferric phosphate provided by the present disclosure has higher purity, tap density and specific surface area, the preparation method can avoid using pH regulator and surfactant, reduce by-product production and cleaning step, greatly simplify production process, have higher industrial application value.

The application provides a method for preparing an M-phase VO2 film by a light-assisted spray pyrolysis method and the M-phase VO2 film prepared by the method, and belongs to the field of nanometer materials. The method comprises the following steps: (1) preparing a vanadium dioxide spraying liquid: adding vanadium oxyacetonylacetone into anhydrous methanol, stirring and aging to obtain a vanadium dioxide spraying liquid with ultraviolet photosensitive properties; (2) preparing a vanadium dioxide film: introducing the vanadium dioxide spraying liquid in step (1) into an atomizer and spraying onto a substrate coated with a TiO2 anatase phase under ultraviolet light irradiation to obtain the M-phase VO2 film. The method enables vanadium ions to be chelated in the sol by stirring, and the vanadium dioxide spraying liquid has ultraviolet photosensitive properties. The purity of the VO2(M) film is improved by introducing a titanium dioxide transition layer, and the microstructure of the VO2(M) film is improved by ultraviolet light irradiation, thereby improving the visual transmittance and solar light regulation rate of the VO2(M) film.

A preparation method of a surfactant modified lithium-rich manganese-based positive electrode material comprises the following steps: adding acetate of lithium, acetate of nickel, acetate of cobalt and acetate of manganese into deionized water, uniformly mixing to form a metal salt solution, adding a sodium lignin sulfonate surfactant, simultaneously adding a citric acid monohydrate complexing agent, and uniformly stirring to obtain a precursor solution; a precursor salt solution with the sodium lignin sulfonate concentration being 0.3 g / L is obtained; performing spray pyrolysis on the precursor salt solution to prepare precursor powder; and placing the precursor powder in a muffle furnace for high-temperature calcination treatment to obtain modified lithium-rich manganese-based positive electrode material powder. The method has the advantages that the integrity of the material structure is favorably maintained, the stability of the material can be greatly improved, and the improvement of the cycle performance is realized.

The invention relates to a process for producing lithium zirconium mixed oxides by means of flame spray pyrolysis, mixed oxides obtainable by this process and their use in lithium ion batteries.

The invention discloses a method for introducing a magnetic flux pinning center into a Bi2212 superconducting wire. The method comprises the following steps: 1, mixing strontium carbonate, calcium carbonate, copper and an M compound, and then mixing with nitric acid to react; 2, performing spray pyrolysis to obtain doped second-phase raw powder, and mixing the doped second-phase raw powder with Bi2212 powder; 3, carrying out one-step heat treatment to obtain Bi2212 phase forming powder containing a doped second phase; 4, tubing and drawing to obtain a multi-core Bi2212 wire rod; and 5, heat treatment. Nano-scale doping elements are dispersed on the surface of a micro-nano-scale hollow microspherical alkaline earth cuprate carrier and then introduced into a Bi2212 wire, so that AEC participates in a reaction in the recrystallization process to generate Bi2212 crystal grains, a nano-scale second phase is carried to enter the Bi2212 crystal grains, the second phase is prevented from appearing at a crystal boundary and abnormally growing, a magnetic flux pinning center is effectively introduced, and the magnetic flux pinning efficiency is improved. The current-carrying performance of the Bi2212 superconducting wire in a magnetic field is improved, and the Bi2212 superconducting wire is suitable for the field of superconducting wires.

A process produces zirconium phosphate by flame spray pyrolysis. A solution of at least one zirconium compound, an organic phosphate and a solvent with less than 10% by weight water is subjected to flame spray pyrolysis. Zirconium phosphate obtainable by this process finds application in batteries to encapsulate lithium mixed oxide particles.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a preparation method and application of a carbon dot loaded metal phthalocyanine composite material, and the specific preparation method comprises the following steps: mixing a carbon source, a nitrogen source and a metal salt, carrying out spray pyrolysis to obtain metal doped carbon dots, compounding the metal doped carbon dots and metal phthalocyanine into the carbon dot loaded metal phthalocyanine composite material, and preparing the carbon dot loaded metal phthalocyanine composite material. As a carrier, the carbon dots improve the dispersity of the metal phthalocyanine and prevent the metal phthalocyanine from being gathered, and the conductivity of the carbon dots promotes charge transfer of the metal phthalocyanine in catalysis or sensing; in addition, the electron storage and transfer capabilities of the carbon dots are combined with the redox active center of the metal phthalocyanine, so that the adsorption energy of a reaction intermediate can be optimized, and electron transfer is accelerated, thereby synergistically promoting the catalytic reaction. The preparation method is simple in process and low in cost, and the prepared composite material is regular in morphology and excellent in stability and can be effectively applied to the field of electro-catalysis, such as electro-catalysis nitric acid reduction and carbon dioxide reduction.

A method for purifying vanadium pentoxide from stone coal with high environmental protection and low energy consumption is provided, including: tightly mixing vanadium-bearing stone coal particles, herbaceous biomass with multiple size specifications, delignified lignin, fermentation bacterial material and anoxic photoferrous iron-oxidizing bacteria, and naturally fermenting in a summer environment with sunlight exposure at the top of the pile; collecting the fermentation exudate and performing precipitation and filtration treatments, extracting the filtrate with an organic extractant, and then back-extracting with an inorganic extractant to obtain a purified solution, and subjecting the purified solution to spray pyrolysis under an oxidizing atmosphere to obtain vanadium pentoxide. The fermentation bacterial material is mushroom residue or mushroom bacterial solution obtained by mashing and diluting mushrooms; the anoxic photoferrous iron-oxidizing bacteria are Rhodomicrobium vannielii. The content of V2O5 in the vanadium-bearing stone coal particles is ≥0.9%, and the content of Fe2O3 is ≥3.9%.

The invention provides a palladium-based catalyst and a preparation method and application thereof, and belongs to the technical field of methane catalytic combustion. The preparation method comprises the following steps: firstly, dispersing palladium salt and a silicon-containing compound in a solvent to prepare a precursor solution; the precursor solution is sprayed into flames through jet flow atomization for a combustion reaction, then calcination treatment is carried out, and the palladium-based catalyst is obtained. The palladium-based catalyst is prepared by adopting a flame spray pyrolysis method, the high-dispersion and anti-sintering palladium-based catalyst is obtained by optimizing the composition of a precursor solution and flame spray pyrolysis process parameters, and the catalyst shows excellent activity and stability in catalytic combustion of low-concentration methane, and has a good application prospect. The catalyst is suitable for catalytic combustion reaction of low-concentration methane in coal mine ventilation air methane.

The invention provides a modified lithium-rich manganese-based precursor as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, enabling a mixed metal salt solution, an indium salt solution and a precipitant solution to flow into a reaction base solution in parallel, and carrying out coprecipitation reaction to obtain a half-step precursor material with a target particle size; mixing the half-step precursor material with a solution containing an organic niobium compound to obtain a precursor material; and finally, carrying out spray pyrolysis treatment on the precursor material and a phosphate solution to obtain the modified lithium-rich manganese-based precursor. According to the invention, the surface and interface stability and the structural stability of the lithium-rich manganese-based precursor material are enhanced through a composite modification technical means of combining multi-metal co-doping and phosphate coating, so that the effective capacity, the cycling stability and the electrochemical performance consistency of the lithium-rich manganese-based positive electrode material are improved.

The present invention relates to the technical field of silver powder preparation, and in particular to a method and apparatus for the continuous mass production of spherical silver powder, comprising a cylindrical crucible, a tungsten needle disposed at the right end of the cylindrical crucible, and a graphite turntable disposed to the right of the tungsten needle. In the present invention, molten silver is sprayed into a nano-spray stream using the cylindrical crucible and the tungsten needle, which is then received by a rotating graphite disk coated with a magnesium oxide layer. Under the high-speed rotation of the graphite disk, the silver stream is intercepted and separated before solidification. When the silver stream contacts the magnesium oxide layer, the liquid / solid non-wetting effect, in which the magnesium oxide layer and silver do not wet each other, causes the intercepted silver stream to form spherical silver powder during the tumbling process. The resulting silver powder has good sphericity, a smooth surface, and excellent conductivity. Compared with conventional spray pyrolysis methods, this method overcomes the problems of poor sphericity and wide particle size distribution.

The invention discloses a preparation method of spherical manganous-manganic oxide particles for well drilling or well cementation, which is characterized in that manganese nitrate and manganese acetate are compounded to realize the coupling of rapid oxidation and mild decomposition, effectively inhibit shell burst and hollow structure and improve the density and integrity of the particles; the introduced polyvinyl alcohol and citric acid can make the fog drop drying process more stable, and the problems of carbon residues and impure phases caused by a traditional surfactant are avoided. Furthermore, a three-stage spray pyrolysis method is adopted, stable evaporation, rapid phase formation and low-temperature curing of the solvent are achieved, and the problems of agglomeration, secondary sintering and insufficient crystal form development in the prior art are solved. The prepared spherical manganous-manganic oxide particles are concentrated in particle size, high in density and good in sphericity degree, can effectively reduce the viscosity of cement paste and reduce the settlement risk, have excellent suspension stability and flowability, are suitable for weighting requirements of high-density oil well cement paste and drilling fluid, and have wide application prospects in oil and gas drilling and well cementation.

A transparent composite conductive film electrode for ultraviolet photoelectric devices is composed of an electrode bottom layer and a top layer on the surface of the electrode bottom layer, the electrode bottom layer is a silver nanowire film, and the top layer is a pyrolysis zirconium acetylacetonate protective layer, the pyrolysis zirconium acetylacetonate protective layer is a precursor solution prepared by taking zirconium acetylacetonate as a solute and taking ethanol and dimethylformamide as a composite solvent, the precursor solution is deposited on the surface of the silver nanowire film through atomization pyrolysis, and finally vacuum annealing is carried out to obtain the pyrolysis zirconium acetylacetonate protective layer which is decomposed into a complex component. By dissolving zirconium acetylacetonate in a composite solvent composed of DMF and ethanol, a transparent conductive film is formed on the surface of the Ag nanowire film through spray pyrolysis deposition, the light transmittance of the conductive film under 310 nm ultraviolet light reaches 97.7% of the Ag nanowire film without a protective layer, and the composite electrode effectively improves the charge collection capacity and transmission stability of the electrode.

The utility model discloses an integrated spray pyrolysis device, which belongs to the technical field of spray pyrolysis, and comprises a box body, a material stirring tank, an atomizing mechanism, a gas carrying mechanism and a control panel, the material stirring tank is arranged on the outer side of the box body; the atomizing mechanism comprises a mist particle output pipe and an atomizer, the atomizer is arranged in the box body, one end of the atomizer is communicated with a material conveying pipe arranged on the material stirring tank, and the other end of the atomizer is communicated with the mist particle output pipe; the carrier gas mechanism comprises a gas inlet assembly and a gas pump, the gas pump is arranged in the box body, a gas inlet of the gas pump is communicated with the gas inlet assembly, a first gas outlet of the gas pump is communicated with the mist particle output pipe, and a second gas outlet of the gas pump is communicated with a gas flow output pipe arranged on the material stirring tank. The micro-nano carbon material uniform in size can be stably prepared, and the operability and adaptability of the device are improved.

The invention relates to a doped and coated ternary positive electrode material, a preparation method thereof and a lithium ion battery. The doped and coated ternary positive electrode material comprises a nickel-cobalt-manganese ternary positive electrode material core and a coating layer, the core of the nickel-cobalt-manganese ternary positive electrode material comprises doped metal elements, and the doped metal elements comprise any one or a combination of at least two of Mg, Zr or Mo; and the material of the coating layer comprises at least one metal oxide. The nickel-cobalt-manganese ternary positive electrode material is doped and coated at the same time, the electrochemical performance of the material is improved, the obtained material shows excellent cycle performance, and the voltage attenuation of the material in the discharge process is greatly reduced. The invention also adopts a preparation method of spray pyrolysis, the ternary oxide precursor with uniform particle size can be prepared in one step, no liquid phase product is generated, the preparation efficiency is high, the cost is low, and the realization of batch production is facilitated.