75 results about "Spray pyrolysis" patented technology

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.

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 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.

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 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 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.

The application relates to a single-crystal high-nickel ternary positive electrode material, a preparation method, a positive electrode sheet and a lithium ion battery, and the preparation method comprises the following steps: mixing a first lithium source, a nickel salt, a manganese salt and a cobalt salt to obtain a lithium-containing metal salt solution; performing spray pyrolysis on the lithium-containing metal salt solution to obtain a lithium-containing oxide precursor; mixing the lithium-containing oxide precursor with a second lithium source, and performing sintering to obtain the single-crystal high-nickel ternary positive electrode material; and in the lithium-containing metal salt solution, the molar ratio of the content of lithium to the total amount of nickel, cobalt and manganese is (0.65-0.75):1. In the application, the lithium source and the nickel, cobalt and manganese source are mixed in a solution, and a lithium-containing oxide precursor with atomic-level uniform distribution of lithium, nickel, cobalt and manganese is obtained by using a spray pyrolysis process, the number and uniformity of ordered superlattice structures in the lithium-containing oxide precursor are improved, the mixing of anions and cations in the sintering process is reduced, the release of lattice oxygen is reduced, and the structural stability of the single-crystal high-nickel ternary positive electrode material is improved.

A highly transparent conductive film comprises an electrode substrate and a top layer. The electrode substrate is a silver nanowire film, and the top layer is a pyrolytic zirconium acetylacetonate protective layer. The pyrolytic zirconium acetylacetonate protective layer is a precursor solution prepared using zirconium acetylacetonate as a solute and ethanol and dimethylformamide as a composite solvent. This precursor solution is deposited onto the surface of the silver nanowire film via atomization pyrolysis, followed by vacuum annealing to obtain a pyrolytic zirconium acetylacetonate protective layer composed of complex components. This invention achieves a transparent conductive film by dissolving zirconium acetylacetonate in a composite solvent of DMF and ethanol, and then depositing it onto the surface of an Ag nanowire film via spray pyrolysis. This transparent conductive film achieves a transmittance of 97.7% at 310 nm ultraviolet light, comparable to that of an unprotected Ag nanowire film, effectively improving the charge collection capacity and transport stability of the electrode.

The invention provides a doped sodium electric precursor as well as a preparation method and application thereof. The preparation method comprises the following steps that a nickel-manganese-iron mixed salt solution and doped metal salt are mixed, and a mixed solution is obtained; wherein doped metal ions in the doped metal salt comprise titanium ions, magnesium ions and zinc ions; and carrying out spray pyrolysis on the mixed solution to obtain the doped sodium electric precursor. The preparation method provided by the invention is simple in process, the doped sodium electric precursor with the characteristics of high entropy effect and the like can be directly prepared through one-step spray pyrolysis, the efficiency is high, the energy consumption is low, and the cost advantage is obvious; in addition, the process route also realizes uniform atomic-scale doping of various elements. The sodium ion layered oxide positive electrode material prepared based on the method is uniform in component and stable in structure, and the rate capability and the cycling stability of the sodium ion layered oxide positive electrode material are remarkably improved.

This invention belongs to the field of inorganic functional material preparation technology, and specifically relates to a method for preparing α-Fe₂O₃ nanopowder by salt-assisted ultrasonic spray pyrolysis. First, an auxiliary salt and a ferric salt are dissolved in deionized water and ultrasonically prepared to form a precursor solution with an iron concentration of 0.01–1 mol / L. Then, the precursor solution is atomized in an ultrasonic atomizer with an ultrasonic frequency of 1.7–3 MHz, and the resulting droplets are collected. After collection, the droplets are ultrasonicated, filtered, and dried to obtain α-Fe₂O₃ nanopowder. This invention, by adding an auxiliary salt as a high-temperature solvent, solves the problems of severe agglomeration, large particle size, and poor uniformity in powders prepared by spray pyrolysis. The α-Fe₂O₃ powder obtained by the above method not only has small particle size, good uniformity and dispersibility, but the added auxiliary salt can also be recycled and reused.

The present application relates to a kind of spray pyrolysis device system and the method for synthesizing metal oxide, the device system includes pyrolysis reaction unit, dust collection unit and flue gas recovery unit connected in order along material flow direction;The pyrolysis reaction unit includes automatic feeding device, carrier compression device, atomizing device and pyrolysis device connected in order along material flow direction, and the side wall bottom of the pyrolysis device is connected with combustion device.The present application can ensure that the actual decomposition temperature and residence time of raw material are accurately controlled by setting automatic feeding device, while using reasonable feeding and pyrolysis process parameters;Metal oxide and flue gas can be efficiently separated by using dust collection unit, high-purity metal oxide preparation can be realized, and it can be used for industrial scale production.

The invention provides a high-entropy oxide porous catalytic electrode and a preparation method and application thereof, and relates to the technical field of water electrolysis hydrogen production, and the preparation method comprises the following steps: carrying out spray pyrolysis on a precursor solution through a molten salt bath to obtain a precursor, taking the precursor, carrying out millisecond-level instantaneous curing on the precursor, depositing the precursor on foamed nickel, and carrying out electrochemical activation to obtain the high-entropy oxide porous catalytic electrode. And performing heat treatment to obtain the high-entropy oxide porous catalytic electrode. According to the invention, the technical problems of uneven element distribution, difficult pore structure regulation and poor binding force between the active layer and the metal substrate during preparation of the high-entropy oxide electrode in the prior art are solved, and the technical effects of high efficiency, energy conservation and high universality of electrode preparation are achieved.

This application relates to the field of oxide target technology, specifically disclosing an ITZO target and its preparation method. The preparation method of the ITZO target includes the following steps: applying an In-containing... 3+ Sn 4+ Zn 2+ A complexing agent is added to the solution to obtain a mixed solution; the mixed solution is then added dropwise to an ammonia solution and aged to obtain a precursor precipitate; the precursor precipitate is then subjected to spray pyrolysis, cold isostatic pressing, and warm isostatic pressing to obtain an ITZO preform; the ITZO preform is then subjected to programmed temperature calcination and programmed temperature cooling to obtain an ITZO target. This application obtains a uniformly composed and highly dense ITZO target by dynamically controlling the composition of the mixed gas during the programmed temperature cooling process through two static pressing treatments; using this target, a transparent conductive film with high visible light transmittance and excellent electrical properties can be prepared by sputtering, solving the technical problems of uneven composition, low density, and poor quality of sputtered films in existing targets.

This invention discloses a method for the efficient recovery of hydrochloric acid through spray pyrolysis to prepare rare earth chloride for catalytic oxidation. The rare earth chloride production apparatus includes a rare earth chloride feeding unit, a rare earth chloride pyrolysis furnace, a separation unit, a negative pressure forming unit, and a hydrogen chloride absorption unit. The rare earth chloride pyrolysis furnace has a feeding port and a gas-solid mixture outlet at the top, a solid product inlet at the bottom, and a solid product outlet at the bottom. The separation unit separates the gas-solid mixture to obtain a gas containing hydrogen chloride and a rare earth chloride solid product, with the solid product discharged from the solid product outlet. The negative pressure forming unit is located between the separation unit and the hydrogen chloride absorption unit. The hydrogen chloride absorption unit absorbs hydrogen chloride from the gas. Using the rare earth chloride production apparatus and method of this invention can largely avoid rare earth chloride agglomeration, improve product purity, and also recover high-concentration hydrochloric acid solutions.

The invention discloses a positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a vanadium source, a complexing agent and a high-molecular polymer with an organic solvent to obtain a mixed solution; (2) respectively carrying out atomization treatment on the mixed solution and the metal salt solution, respectively conveying the atomized mixed solution and the metal salt solution into a spray pyrolysis furnace by using gas, and carrying out mixed pyrolysis to obtain a coated precursor; and (3) mixing the coated precursor with a lithium source or a sodium source, and sintering to obtain the positive electrode material. A spray pyrolysis method is adopted, the tap density and uniformity of the precursor are improved while the precursor is coated, and the positive electrode material with excellent performance can be prepared.

The application discloses a spray pyrolysis device and a method for preparing ternary positive electrode precursors by using the same. The spray pyrolysis device comprises a feeding unit, a spraying unit and a pyrolysis unit; a first unit, a second unit and a third unit are sequentially arranged in a cavity of the spraying unit; an atomizing device is arranged at an outlet of the third unit; the first unit, the second unit and the third unit are heated by a first ultrasonic wave generating assembly, a second ultrasonic wave generating assembly and a third ultrasonic wave generating assembly respectively; the atomizing device is communicated with the pyrolysis unit, so that atomized liquid generated by the atomizing device enters the pyrolysis unit; a ignition device is arranged at an inlet of the pyrolysis unit; P1 < P2 < P3. The spray pyrolysis device can avoid the problems of particle breakage and hollowing of the positive electrode material precursor, so that the tap density of the positive electrode material precursor is high, the specific surface area is low, and the chlorine content is low, thereby improving the energy density, cycle performance and safety performance of the positive electrode material, and reducing the preparation cost.

The invention provides a sodium battery precursor and a preparation method thereof, a sodium battery positive electrode material and a battery, and the preparation method comprises the following steps: mixing a titanium salt, an iron salt, a manganese salt, a complexing agent solution and a pH regulator to obtain a mixed solution; carrying out spray pyrolysis on the obtained mixed solution to obtain a sodium electric precursor; the spray pyrolysis is carried out in two stages, the temperature of the first stage is 500-600 DEG C, and the temperature of the second stage is 800-900 DEG C; spray pyrolysis is carried out in two stages, in the first stage, rapid drying is carried out at the temperature of 500-600 DEG C to form an amorphous intermediate, and in the second stage, high-temperature crystallization is carried out at the temperature of 800-900 DEG C, so that the obtained sodium electric precursor is high in crystallinity, more complete in layered structure and higher in uniformity and has fewer crystal structure defects; therefore, the sodium battery prepared from the sodium electric precursor is slow in capacity fading and long in cycle life in the charging and discharging process.

A preparation method of carbon-doped iron phosphate, comprising the following steps: (1) mixing ammonium ferrocyanide, a phosphorus source and pyridine oxide to obtain an iron-phosphorus mixed solution; (2) performing spray pyrolysis on the iron-phosphorus mixed solution obtained in step (1) to obtain solid particles; (3) crushing the solid particles obtained in step (2) to obtain carbon-doped iron phosphate; and further applying the carbon-doped iron phosphate obtained by the above preparation method to prepare lithium iron phosphate.

The invention relates to the field of industrial combustion, and particularly discloses a catalyst for industrial combustion and a preparation method and application thereof. A preparation method of a catalyst for industrial combustion comprises the following steps: S1, preparing a carrier: ultrasonically dispersing cerium salt and zirconium salt in an organic solvent to obtain a precursor solution, then performing spray pyrolysis on the precursor solution to obtain intermediate powder, and calcining to obtain the carrier; the active metal derivative and the carrier are blended, impregnated and loaded, the catalyst for industrial combustion is obtained, the active metal derivative comprises palladium salt and / or a platinum complex, the palladium loading capacity in the catalyst for industrial combustion is 0.7-0.8 wt%, and the platinum loading capacity in the catalyst for industrial combustion is 0-0.1 wt%. The product disclosed by the invention can be used for catalyzing natural gas combustion and efficiently treating various pollutants at the same time, the NOx conversion rate is increased to 95% or above, the CO oxidation efficiency reaches 99.8% or above, and the economic benefits of industrial application are remarkably increased.

The embodiment of the invention relates to a carbon-coated tungsten oxide quantum dot material and a preparation method and application thereof.The preparation method comprises the steps that a tungsten source is added into a polyhydric alcohol solution to obtain a mixed solution, the mixed solution is placed in a microwave reactor, heat preservation is conducted for the first time at the first reaction power and the first temperature, the tungsten source is heated and decomposed into tungsten oxide, and the tungsten oxide is obtained; performing coordination bonding on oxygen atoms of tungsten oxide and hydroxyl groups of the polyol solution to obtain a reaction precursor solution; carrying out heat preservation on the reaction precursor solution at a second reaction power and a second temperature for a second time, so that the crystal nucleus of tungsten oxide grows in the polyol solution, and obtaining a polyol solution of tungsten oxide quantum dots; the preparation method comprises the following steps: in an inert atmosphere, performing spray pyrolysis on a polyol solution of tungsten oxide quantum dots, so that the outer surfaces of the tungsten oxide quantum dots are coated with carbonized polyol, and the carbon-coated tungsten oxide quantum dot material is obtained.

Methods of synthesis of nickel-rich cathode materials can include preheating droplets, decomposing the droplets in a burner, collecting solid particles, and calcinating the solid particles.

This invention relates to the field of battery recycling technology, specifically to a method and apparatus for regenerating cathode materials from waste lithium iron phosphate batteries. The method includes the following steps: mixing recycled lithium iron phosphate cathode powder with hydrogen peroxide solution while simultaneously introducing carbon dioxide gas to obtain a first mixture containing lithium salt and iron phosphate; determining the proportions of lithium, iron, and phosphorus in the first mixture, adding a lithium source, iron source, or phosphorus source according to the test results, and adding a carbon source to obtain a second mixture, which is then ball-milled; and subjecting the ball-milled second mixture to spray pyrolysis under an inert gas atmosphere to obtain carbon-coated lithium iron phosphate material. Using this method, the process flow is short, the operation is simple, the cost is low, and resource recycling can be achieved.

The present invention relates to catalyst particles and a method for manufacturing the same. The film of the catalyst enables control of oxygen defects acting as catalytic active sites, enables the synthesis of single-atom catalysts, and can improve catalytic activity by bonding one or more single atoms to a metal oxide having micropores through a spray pyrolysis process.

The invention provides a ternary oxide precursor and a preparation method thereof, a positive electrode material and a battery, and the preparation method comprises the following steps: carrying out spray pyrolysis on a mixed solution containing nickel ions, cobalt ions, manganese ions and an organic ligand to obtain the ternary oxide precursor. According to the preparation method, the organic ligand is introduced into the spray pyrolysis solution, so that regulation and control on the microstructure and component uniformity of the ternary oxide precursor are realized, and the ternary oxide precursor with a hollow porous structure, relatively high specific surface area and uniform components is prepared; therefore, the battery comprising the positive electrode material prepared from the ternary oxide precursor shows relatively high rate capability and relatively long cycle life.

The invention discloses a preparation method and application of a Fe-M diatom-loaded Bi2MoO6 composite material, the diatom-loaded Bi2MoO6 composite material is prepared by adopting a spray pyrolysis method, and the preparation method is simple, low in cost and environment-friendly; the prepared Fe-M diatom-loaded Bi2MoO6 composite material can realize rapid degradation of NO3 <-> / NO2 <-> and efficient conversion to NH4 < + > in NO3 <-> and NO2 <-> solutions as a catalyst, the prepared FePd diatom-loaded Bi2MoO6 composite material has the strongest catalytic performance, and the Fe site and the Pd site have efficient adsorption and activation capacities on NO3 <-> and NO2 <-> respectively, so that a series catalytic effect is formed, and the Fe-M diatom-loaded Bi2MoO6 composite material can be used as a catalyst for preparing the composite material. Good stability and practical application potential are shown.

This disclosure belongs to the field of carbon nanotube preparation technology, and provides a system and method for the continuous preparation of array-type carbon nanotubes. The system includes a reaction vessel, an atomization system, a pyrolysis furnace, a classifier, a feeder, and a CVD fluidized bed connected in sequence. Preparation method: The catalyst is designed with the chemical formula Fe. a Co b Ni c Mg d Al e Mo f Mn g V h The catalyst solution was prepared according to the stoichiometric ratio of the above chemical formula, and the reaction was carried out sequentially in the above system to finally obtain arrayed carbon nanotubes. This disclosure utilizes the rapid and one-step characteristics of spray pyrolysis, combined with precise catalyst structure design, to obtain a catalyst with high-density active sites and small active site particle size, achieving efficient, continuous, and controllable preparation from molecular precursors to high-performance arrayed carbon nanotubes. Furthermore, the spray pyrolysis method can be used to prepare catalysts with high activity and low bulk density, which is beneficial for CVD fluidized bed production of arrayed carbon nanotubes.

According to the various aspects, a method is disclosed that includes providing a substrate with a plurality of through hole vias disposed in the substrate and each through hole via having an interior sidewall. The substrate may be disposed on a support in a spray pyrolysis tool. In an aspect, the substrate may be preheated and a precursor solution may be dispensed towards the sidewalls of the plurality of through hole vias. The heating of the precursor solution results in the forming of a dielectric liner on the sidewalls. In another aspect, a device having a glass core with a plurality of through hole vias that form sidewalls disposed in the substrate, a dielectric liner having a grain size in a range of approximately 20 nm to 500 nm, and a conductive material filling the plurality of through hole vias.