504 results about "Cobalt oxide" patented technology

The application provides a method for grading diesel deep hydrodesulfurization catalysts, which comprises the following steps: loading catalysts containing AlPO4-5 phosphorus aluminum molecular sieves and catalysts containing ETS-10 titanium silicon molecular sieves in the upper and lower parts of a fixed bed hydrogenation reactor respectively according to a loading mass ratio of 1:3-3:1, so that diesel is subjected to hydrodesulfurization reaction through catalysts containing AlPO4-5 phosphorus aluminum molecular sieves first and then through catalysts containing ETS-10 titanium silicon molecular sieves; the carrier of the catalysts containing AlPO4-5 phosphorus aluminum molecular sieves comprises AlPO4-5 phosphorus aluminum molecular sieves and aluminum oxide powder, the carrier of the catalysts containing ETS-10 titanium silicon molecular sieves comprises ETS-10 titanium silicon molecular sieves and aluminum oxide powder, and the active components of the two kinds of catalysts respectively comprise a combination of two or three of nickel oxide, molybdenum oxide and cobalt oxide. The sulfur content of the hydrogenated diesel obtained through the method can be as low as 10 μg / g or below.

The invention relates to a composite nanodot loaded porous carbon nitride photocatalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: calcining a precursor formed by mixing melamine, cyanuric acid and trithiocyanuric acid to obtain porous carbon nitride, and loading cobalt oxide nanodots and nickel nanodots on the porous carbon nitride in two steps, the composite nanodot loaded porous carbon nitride photocatalyst with excellent visible light catalytic hydrogen production performance is obtained; when the composite nanodot loaded porous carbon nitride photocatalyst obtained by the method is used for photocatalytic hydrogen production, an activity test result shows that the activity of the photocatalyst prepared by the method is improved by 222.5 times compared with that before modification; the preparation method disclosed by the invention has the advantages of high reaction efficiency and good performance of the obtained photocatalyst, and has a wide application prospect.

The application discloses a composite precipitant for wet refining of laterite nickel ore and a wet refining method of laterite nickel ore. The composite precipitant for wet refining of laterite nickel ore is composed of a mixture of magnesium oxide and sodium hydroxide, and the mass fraction of sodium hydroxide in the composite precipitant is greater than 0 and less than or equal to 99%. The wet refining method of laterite nickel ore comprises the following steps: directly or after being grinded, the composite precipitant is added into an acidic solution to be refined, and stirring is performed to make the composite precipitant fully react with the acidic solution to be refined; after concentration, a clear liquid and a solid-containing slurry are obtained; the solid-containing slurry is filtered and washed with water to obtain a solid containing nickel hydroxide, cobalt hydroxide or nickel hydroxide-cobalt hydroxide, so that nickel, cobalt or nickel-cobalt is precipitated. The composite precipitant and the wet refining method of laterite nickel ore have the advantages of simple process, low cost, easy process control, easy settlement and filtration of nickel hydroxide (and cobalt hydroxide) precipitation, and the production efficiency can be significantly improved and the energy consumption can be reduced.

The invention relates to the technical field of drying, in particular to a flash evaporation drying device for cobalt hydroxide production, which comprises a drying cylinder, fan blades, a ceramic ring and a first-stage separation assembly, a drying cavity is formed in the drying cylinder, the fan blades are rotatably arranged at the lower part of the drying cavity, and the fan blades can rotate around the axis of the fan blades; and the ceramic ring is arranged at the upper part of the drying cavity and used for driving the air in the drying cavity to spirally move from bottom to top. The first-stage separation assembly is arranged, materials which are not discharged out of the drying cavity through the pottery ring can fall into the first vortex disc, the materials with different particle sizes are adaptively crushed in the first vortex disc, so that the particle uniformity of the materials entering the drying cavity again from the first vortex disc is improved, and in addition, the larger the particle size of the materials is, the larger the particle size of the materials is, the larger the particle size of the materials is. And the retention time of the materials in the first-stage separation assembly is longer, so that the temperature uniformity of the materials is also improved.

The invention discloses porous chlorine dioxide slow-release preservative paper and a preparation method thereof.The porous chlorine dioxide slow-release preservative paper comprises a paper base, a porous carrier is fixed to the paper base through oxidized starch glue, and sodium chlorite, an activating agent and a stabilizing agent are loaded on the porous carrier; the porous carrier is one of aluminum oxide, titanium oxide, cobalt oxide, zinc oxide, copper oxide, iron oxide, cerium oxide, zirconium oxide, nickel oxide, manganese oxide, praseodymium oxide and lanthanum oxide with a porous structure. The slow release of chlorine dioxide can be stably and effectively realized, the release period of chlorine dioxide is prolonged, and long-acting stable sterilization and disinfection effects are realized.

The invention relates to a battery material preparation technology, in particular to a method for preparing high-purity cobaltous sulfate from crude cobaltous hydroxide, which comprises the following steps: S1, reacting the crude cobaltous hydroxide with sulfuric acid to generate magnesium sulfate; s2, washing to remove magnesium; s3, adding sulfuric acid and hydrogen peroxide into the crude cobalt hydroxide after magnesium washing; adding crude cobalt hydroxide to adjust the pH value to obtain a purified solution; s4, adding sodium fluoride into the purified liquid, and filtering after reaction to obtain filtrate; s5, saponifying with sodium hydroxide by using an acidic extractant, then performing soap conversion by using a cobalt sulfate solution, extracting manganese in the filtrate by using an obtained organic phase, and then performing reverse extraction on the organic phase by using sulfuric acid to obtain a manganese sulfate solution; s6, the raffinate obtained after manganese extraction is introduced into an adsorption tower loaded with a zirconium-based composite fluorine adsorbent; and S7, concentrating and crystallizing the defluorinated solution. According to the method, the zirconium-based composite fluorine adsorbent is introduced to be coupled with the process, fluorine ions can be removed, and cobalt loss caused by cobalt fluoride precipitation and the influence of the fluorine ions on the quality of a cobalt sulfate product are avoided.

The present disclosure belongs to the field of batteries, and particularly relates to cobalt hydroxide and a preparation method therefor, a positive electrode material, a battery and electrical equipment. Provided in the present disclosure is cobalt hydroxide, the particles of which are in the shape of a sheet and have an average thickness of 10-20 nm. The cobalt hydroxide of the present disclosure is nanosheets having an extremely small average thickness and a larger surface area, which can thus improve the coating effect thereof on a positive electrode material, thereby effectively inhibiting the formation of a nickel oxide rock salt-like phase in the positive electrode material, reducing the concentration of residual lithium on the surface of the positive electrode material and enabling lithium ions to be quickly deintercalated / intercalated; therefore, the electrical properties of the positive electrode material prepared therefrom can be significantly improved.

A method for manufacturing composite cathode particles based on a dual-coated ternary oxide for an electrochemical battery by a high speed rotation includes the steps of: placing a plurality of large NCM (lithium nickel manganese cobalt oxide) particles and a glass phase material into a first mixer for stirring by a first high speed rotation to form a plurality of glass-phase-layer-contained NCM particles; then mixing a plurality of small LLZO particles and the glass-phase-layer-contained NCM particles by a second high speed rotation of a second mixer to form a plurality of composite NCM particles; and then mixing the composite NCM particles, a plurality of first carbon nanotubes and a plurality of nanoscale amorphous carbons to form a plurality of carbon-material-contained positive electrode particles.

The invention relates to the technical field of catalysts, in particular to a composite catalyst for nitrous oxide decomposition and a preparation method thereof.The composite catalyst is of a three-dimensional flower-shaped structure and comprises a composite carrier and active metal loaded on the composite carrier; the composite carrier is composed of a modification additive and a carrier oxide; the performance additive is composed of alkali metal oxide and rare earth metal oxide; the carrier oxide is selected from one of aluminum oxide, titanium dioxide and silicon dioxide; the active metal comprises cobalt oxide and vanadium oxide. The multi-metal catalyst has the advantages that the multi-metal catalyst with a three-dimensional flower-shaped structure is formed by loading cobalt and vanadium active metals on aluminum oxide and under the synergistic effect of alkali metal and rare earth metal, so that the stability and durability of the catalyst in a high-temperature environment are remarkably improved.

The invention belongs to the technical field of lithium ion batteries, and particularly discloses a composite coated high-voltage lithium cobalt oxide positive electrode material as well as a preparation method and application thereof. The positive electrode material comprises an inner core, and a first coating layer and a second coating layer which sequentially coat the inner core from inside to outside; the inner core is a doped lithium cobalt oxide matrix, the chemical formula is Li1 + xCo1-yM1yM2zO2, x is more than or equal to 0 and less than or equal to 0.1, y is more than or equal to 0.001 and less than or equal to 0.05, z is more than or equal to 0.001 and less than or equal to 0.05, M1 is selected from at least one of Al, Ni and Fe, and M2 is selected from at least one of Mg, Al, Zr, Zn, Ni, Fe, Sr, Mo, Ta and W; the chemical formula of the first coating layer is La1-mNmCoO3-n.Co3O4, m is greater than 0 and less than 1, n is greater than 0 and less than 3, and N is selected from one or two of Ca, Mg, Fe, Zn, Ba and Zr; and the second coating layer is cobalt oxide of YOF and Y. The core problems of bulk phase structure degradation, serious interface side reaction, interface impedance increase and the like under high voltage can be cooperatively solved.

The utility model relates to the technical field of drying and energy saving, and particularly discloses a cobalt nickel hydroxide or cobalt hydroxide drying system based on waste heat steam utilization, which comprises a mixing device, a steam rotary drying device, a dust removal device and a spray washing device which are connected in sequence, steam in the upstream flash evaporation process is subjected to deacidification treatment and then is introduced into a heat exchange tube bundle of the steam rotary drying device to serve as a heat source; the discharging end of the steam rotary drying device is respectively connected with a discharging branch and a material returning loop through a discharging screw; the material returning loop is connected to one feeding hole of the material mixing device, and the other feeding hole of the material mixing device is connected with a nickel cobalt hydroxide or cobalt hydroxide wet material conveying device. An indirect heat exchange mode is adopted, only a small amount of hot air is needed to serve as moisture-carrying gas, the tail gas amount is greatly reduced, meanwhile, damage to materials caused by direct contact with high-temperature hot air in a traditional drying mode is avoided, the physical property of the materials can be kept, and the particle size and quality of products are improved.

The application discloses porous chlorine dioxide slow-release preservative paper and a preparation method thereof. The paper comprises a paper base, a porous carrier is fixed on the paper base through oxidized starch glue, sodium chlorite, an activator and a stabilizer are loaded on the porous carrier, and the porous carrier is one of porous structures of aluminum oxide, titanium oxide, cobalt oxide, zinc oxide, copper oxide, iron oxide, cerium oxide, zirconium oxide, nickel oxide, manganese oxide, praseodymium oxide and lanthanum oxide. The application can stably and effectively realize slow release of chlorine dioxide, prolong the release period of chlorine dioxide, and realize long-acting and stable sterilization and disinfection.

The invention discloses a rate type lithium iron phosphate positive electrode material, a preparation method and a battery thereof, firstly, iron phosphate is modified by dopamine hydrochloride, the surface activity of the iron phosphate is improved, subsequent doping of cobalt and magnesium is facilitated, meanwhile, excessive growth of crystal grains can be limited in high-temperature sintering, nitrogen and carbon are introduced into lithium iron phosphate, and the rate type lithium iron phosphate positive electrode material is prepared. A carbon-nitrogen coating layer is formed, so that the electronic conductivity is improved; then, isopropyl tri (dioctyl pyrophosphate acyloxy) titanate, cobalt oxide and magnesium oxide are adopted to prepare a doping agent, cobalt and magnesium are uniformly doped into lithium iron phosphate crystal lattices to form bulk phase doping, and cobalt and magnesium co-doping synergistically improves the electronic conductivity and structural stability of the lithium iron phosphate material; finally, a biomass carbon source beta-cyclodextrin is adopted for carbon coating, a uniform carbon layer is formed on the surface of the lithium iron phosphate, and the electrochemical performance of the lithium iron phosphate is further improved; the lithium iron phosphate material prepared by the method also has good electrochemical performance under high magnification.

The invention provides a lithium-rich manganese-based positive electrode material, the lithium-rich manganese-based positive electrode material comprises a matrix and a coating layer on the surface of the matrix, in a powder X-ray diffraction pattern of the lithium-rich manganese-based positive electrode material, a peak of cerium oxide exists at a diffraction angle of (28 + / -0.2) degrees, and a peak of cobalt oxide exists at a diffraction angle of (54 + / -0.2) degrees; the invention further discloses a preparation method of the lithium-rich manganese-based positive electrode material, compared with the prior art, the coated and modified lithium-rich manganese-based positive electrode material provided by the invention takes the compound with the specific general formula as a matrix, and a composite coating layer with stable chemical properties is obtained through composite coating of nano cobalt oxide and nano cerium oxide; due to the synergistic effect of cobalt and cerium oxide, the specific surface area of the lithium-rich manganese-based material is reduced, the binding force with the surface of the material is increased, and the problem that a coating layer falls off and fails is solved.

The invention discloses a ruthenium-loaded nickel-cobalt oxide heterostructure electrocatalyst and a preparation method thereof.The preparation method of the ruthenium-loaded nickel-cobalt oxide heterostructure electrocatalyst comprises the steps that nickel nitrate hexahydrate, cobalt nitrate hexahydrate, ammonium fluoride and urea are dissolved in deionized water and stirred for 30 min, the mixture and carbon cloth are subjected to a hydrothermal reaction, cleaning, drying and calcination are conducted, and the ruthenium-loaded nickel-cobalt oxide heterostructure electrocatalyst is obtained; forming a second intermediate product; ruCl3.xH2O and KCl are added into H2O, magnetic stirring is conducted for 30 min, and a second process solution is obtained; and performing electrochemical deposition of ruthenium on the second intermediate product through cyclic voltammetry to obtain a third intermediate product, and drying the third intermediate product to obtain the ruthenium-loaded nickel-cobalt oxide heterostructure electrocatalyst. According to the preparation method of the ruthenium-loaded nickel-cobalt oxide heterostructure electrocatalyst provided by the embodiment of the invention, the proportion of ruthenium in the product is more easily regulated and controlled, so that the optimal nitrate electrocatalysis reduction performance is obtained.

The invention belongs to the technical field of magnetic material preparation, and particularly relates to a production process of high-performance rare earth permanent magnetic ferrite magnetic powder. The process comprises the following steps: preparing iron oxide red and auxiliary materials, wherein the auxiliary materials comprise calcium carbonate, strontium carbonate, lanthanum oxide and cobalt oxide; mixing the raw materials in proportion, and then carrying out dry ball-milling densification to obtain a mixed material; the obtained mixture is subjected to steam treatment, the water content of the mixture reaches 2%-5%, then curing is conducted, the curing time is at least 30 min, and the curing process is completed in the auger transfer process; pelletizing is performed; pre-sintering is performed; and coarsely crushing and sieving the pre-sintered material to obtain the rare earth permanent magnetic ferrite magnetic powder. Through steam pretreatment and curing, the strength and thermal stability of the ball material are remarkably improved, the ball material is kept complete and good in fluidity in the kiln, and the consistency and the qualified rate of products are improved.

The application belongs to the technical field of magnetic material preparation, and particularly relates to a production process of high-performance rare earth permanent ferrite magnetic powder. The process comprises the following steps: preparing iron red and auxiliary materials, wherein the auxiliary materials comprise calcium carbonate, strontium carbonate, lanthanum oxide and cobalt oxide; mixing raw materials in proportion, then performing dry ball milling to obtain mixed materials; performing steam treatment on the obtained mixed materials to make the water content of the mixed materials reach 2-5%, then performing ripening, and the ripening time is at least 30 min, and the ripening process is completed in the screw conveyor; balling; pre-sintering; performing coarse crushing on the pre-sintered materials and sieving to obtain rare earth permanent ferrite magnetic powder. Through steam pretreatment and ripening, the strength and thermal stability of the ball materials are significantly improved, the ball materials remain complete in the kiln, the flowability is good, and the consistency and qualified rate of the product are improved.

The application relates to the technical field of chemical product preparation, in particular to a cobalt hydroxide preparation device and a preparation process thereof. The cobalt hydroxide preparation device comprises a reaction kettle provided with a manhole, the manhole is provided with a manhole cover, the manhole cover comprises a lower seat and a fixing assembly, a support is hinged to the lower seat, a connecting seat is arranged on the support, an upper cover is arranged on the connecting seat, the upper cover is used for controlling the opening and closing of the manhole, a sealing ring is arranged between the lower seat and the upper cover, the fixing assembly is used for fixing the lower seat and the upper cover, the upper cover can rotate around a second axis, the direction of the gravity of the connecting seat and the upper cover and the second axis are coplanar, when the manhole is opened through the upper cover, the lower end surface of the upper cover and the upper end surface of the lower seat are kept parallel in a short time, and then the damage of the sealing ring caused by uneven stress is avoided, the connecting seat can rotate around a first axis, the first axis and the second axis are perpendicular, the upper cover has the freedom of two rotating directions, and the damage of the sealing ring is reduced.

The application provides a one-dimensional iron oxide nanorod heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of photoelectrocatalytic water splitting hydrogen production. The composite material provided by the application comprises: one-dimensional iron oxide nanorods, cuprous sulfide nanoparticles loaded on the one-dimensional iron oxide nanorods, and cobalt hydroxide nanosheets coated on the surfaces of the one-dimensional iron oxide nanorods and the cuprous sulfide nanoparticles. On one hand, the Fe2O3 / Cu2S p-n heterojunction is introduced to accelerate the separation of photo-generated carriers in the Fe2O3 nanorod array, and on the other hand, the Co(OH) x The surface OECs accelerate the kinetics process of interfacial water oxidation, the rapid depletion of photo-generated holes further improves the charge separation of the photoanode surface, and the synergistic effect between the Fe2O3 / Cu2S p-n heterojunction and the OECs significantly improves the PEC water splitting performance of the iron oxide nanorod array composite material.

This invention provides a photocatalytic composite nanoenzyme self-cleaning coating, its preparation method, and its application. Specifically, it includes: preparing solution A with Ca(NO3)2·4H2O and nano-cerium oxide; preparing solution B with (NH4)2HPO4 and hexadecyltrimethylammonium bromide; mixing solutions A and B, and reacting at high temperature to obtain cerium oxide nanoenzyme / hydroxyapatite microspheres; and using (NH4)6Mo7O... 24 Solution M is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solution N is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solutions M and N are mixed to obtain a precursor; the precursor is reacted with cobalt oxide at high temperature to obtain Co / Fe2(MoO4)3; tetraethyl orthosilicate, anhydrous ethanol, deionized water, and ammonia are mixed and sealed for aging; after adding a modifier, it is mixed with cerium oxide nanoenzyme / hydroxyapatite microspheres and Co / Fe2(MoO4)3, sprayed onto the obtained composite coating, and cured at high temperature to obtain a self-cleaning coating. This invention, by loading a photocatalyst and nanoenzyme / hydroxyapatite microspheres onto the surface of a modified SiO2 gel, effectively improves the photocatalytic activity and self-cleaning performance of the coating while maintaining good optical transmittance.

The invention discloses a manganese cobalt oxide and zirconium oxide composite plasma developing material, and belongs to the field of plasma process detection and visual developing materials. In order to solve the problems that an existing plasma indicating material is high in reversibility, unstable in color development, not resistant to high temperature and prone to generating organic pollution, the invention provides a full-inorganic composite color development system which is resistant to high temperature and irreversible in color development. The material is formed by compounding manganese oxide (MnO), cobalt oxide (CoO) and zirconium oxide (ZrO), the molar ratio of Mn to Co is (3-7): 1, and the content of ZrO is 10-40 wt%. Under the action of plasmas, synergistic valence transition from Mn to Mn and from Co to Co occurs in the material, and zirconium oxide is used as a lattice stable phase and an oxygen vacancy buffer phase, so that the high-temperature structural stability and the color development retentivity are remarkably improved. The material still keeps stable color development under the condition of 300-400 DEG C, the color development contrast delta E is larger than or equal to 30, and the material can be prepared through a sol-gel or physical vapor deposition (PVD) method. According to the invention, a high-contrast, irreversible, pollution-free and long-term stable plasma developing indication function is realized, and the device is suitable for visual detection and verification of semiconductors, medical sterilization and high-cleanliness processes.

The application discloses a kind of palladium-doped Co3O4 Nanosheet and its preparation method, and specifically discloses its application in photocatalytic reduction CO2 production acetic acid.The application is synthesized by using hydrothermal method first four cobalt oxide, then adding palladium source to the alkaline dispersion liquid of four cobalt oxide, and stirring to make it react, and successfully prepares palladium-doped four cobalt oxide nanosheet.The palladium-doped four cobalt oxide nanosheet prepared by the application is applied to the reaction of photocatalytic reduction carbon dioxide, which can greatly improve the catalytic reduction efficiency of CO2, and the product of photocatalytic reduction carbon dioxide is acetic acid.The application uses palladium-doped four cobalt oxide nanosheet to photocatalytic reduction carbon dioxide, and the yield of product acetic acid can be as high as 14 μmol / g / h, which is much higher than that of undoped four cobalt oxide nanosheet (3 μmol / g / h).

This application provides a method and system for extracting scandium from a scandium-containing cobalt-nickel hydroxide solution, belonging to the field of heavy metal recovery technology. The method includes the following steps: extracting the scandium-containing cobalt-nickel hydroxide solution with an organic extractant to obtain a scandium-containing organic phase; washing the scandium-containing organic phase to obtain a purified organic phase; back-extracting the purified organic phase with hydrochloric acid to obtain a scandium-containing back-extract and a back-extracted organic phase; performing scandium extraction treatment on the scandium-containing back-extract to obtain scandium oxide; and regenerating the back-extracted organic phase sequentially with sodium carbonate and dilute sulfuric acid to obtain a regenerated organic extractant, which is then reused. This application first sequentially washes the chlorine with sodium carbonate and sulfuric acid solutions, solving the emulsification problem in the extraction, washing, and back-extraction stages caused by washing with sodium carbonate solution. Furthermore, compared to directly using sulfuric acid solution for washing, this application uses less sulfuric acid in the regeneration stage, preventing phase miscibility during the washing process.

This invention provides a dual-effect catalyst for the simultaneous removal of NH3 and N2O, comprising a support and a coating applied to the surface of the support. The coating includes an inner coating and an outer coating. The inner coating adheres closely to the surface of the support, and the outer coating covers the surface of the inner coating. The inner coating comprises the following components: Pt, Co3O4, BaO, Al2O3, and TiO2. The outer coating comprises Cu-SSZ-13 and a binder. This invention uses barium-modified cobalt oxide to obtain a highly active N2O removal material. Simultaneously, the use of an Al2O3 and TiO2 composite coating combines the anti-poisoning properties of TiO2 with the high-temperature resistance of Al2O3, and reduces the N2O generation of traditional ASC catalysts. By combining the two catalysts and coating them on the same support, a dual-effect catalyst capable of simultaneously removing NH3 and N2O is obtained. This invention also provides a method for preparing the dual-effect catalyst for the simultaneous removal of NH3 and N2O. Research on the selection of catalyst precursors, component ratios, and post-treatment methods yields a highly active dual-effect catalyst.

Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate. The production method for cobalt sulfate includes: a copper removal step (S1) of adding a sulfurizing agent to a cobalt chloride solution containing one or more impurities of copper, zinc, manganese, calcium, and magnesium and generating a precipitate of sulfide of copper to separate to remove copper; a neutralization step (S2) of adding a neutralizer or a carbonation agent to a cobalt chloride solution having undergone through the copper removal step (S1) and generating cobalt hydroxide or basic cobalt carbonate to separate magnesium; a leaching step (S3) of adding sulfuric acid to the cobalt hydroxide or the basic cobalt carbonate to obtain cobalt sulfate solution; and a solvent extraction step (S4) of bringing an organic solvent containing an alkyl phosphoric acid-based extractant to the cobalt sulfate solution and extracting zinc, manganese, and calcium into the organic solvent to separate to remove zinc, manganese, and calcium. These steps are sequentially executed.

NCM electrode particle, which has an interphase layer and a nitrogen-containing carbon layer; the NCM electrode particle is used in an electrode of a solid-state battery or a semi-solid battery; the NCM electrode particle comprises: an NCM particle (lithium nickel manganese cobalt oxide) with a single-crystal structure; The intermediate phase layer is applied to the outer surface of the NCM particle; the NCM particle coated with the intermediate phase layer forms a primary particle; the intermediate phase layer comprises a glass phase layer and several ceramic particles dispersed therein; the intermediate phase layer serves to protect the NCM particle and increases the lithium-ion conductivity; A nitrogen-containing carbon layer is applied to the outside of the primary particle; the NCM electrode particle is formed by the NCM particle, the intermediate phase layer, and the nitrogen-containing carbon layer; the nitrogen-containing carbon layer serves to increase the electrical conductivity of the NCM electrode particle; and where nitrogen-doped carbon molecules in the nitrogen-containing carbon layer increase the electronic conductivity and lithium-ion conductivity of the NCM particles and modify the electrical potential of the NCM particles; the nitrogen-containing carbon layer is formed by calcining a nitrogen-containing polymer material in an inert atmosphere and applied to the outer surface of the primary particle; carbon and nitrogen in the nitrogen-containing carbon layer form conjugated C=N bonds to modify an energy band and thus reduce the energy required to excite electrons into a conduction band, thereby increasing the electrical conductivity.

This invention discloses a coatable, moldable dual-functional coating material for heat protection and stealth, and its preparation method. The coating material is formed from a SiC-based composite ceramic aerogel slurry, a perovskite / MAX phase composite ceramic absorber, and a high-temperature resistant binder. The composite ceramic aerogel slurry is composed of SiC micro / nano-scale aerogel powder, SiC nanowires, and a high-temperature resistant binder; the perovskite ceramic absorber is lanthanum strontium manganese oxide (La). 1‑x Sr x MnO3), lanthanum strontium iron oxide (La) 1‑ x Sr x FeO3), lanthanum strontium cobalt oxide (La) 1‑x Sr x The MAX phase ceramic absorber is Ti3SiC2, and it contains substances such as CoO3. The technology of this invention enables the rapid application of coating materials to the surface of equipment via brushing, enhancing high-temperature radar absorption stealth and thermal protection capabilities, and facilitating the preparation and efficient repair of high-temperature stealth coatings.

The application belongs to the technical field of gas sensing material preparation, and discloses an Ag / AgCl modified Co3O4 nano-composite material, a preparation method and application, and comprises the following steps: dissolving inorganic compounds of Ag elements and inorganic compounds of Co elements in deionized water, adding a proper amount of NaCl solution first, then adding N2H4.H2O solution, and obtaining Ag / AgCl loaded alpha-Co(OH)2 nanosheet material by using coprecipitation and in-situ reduction method; and drying and sintering the Ag / AgCl loaded alpha-Co(OH)2 nanosheet material to obtain the Ag / AgCl modified Co3O4 nano-composite material. The application provides a preparation method of a low-temperature high-response gas sensing material, the prepared Ag / AgCl loaded Co3O4 material has higher ethanol gas response performance, can significantly reduce the optimal working temperature of the sensing material, has potential application prospect, and can be used for monitoring alcohol pollutant gases in atmospheric environment, chemical plant environment, home environment and the like.

This invention discloses a black-based blue-spotted glaze with an earthworm-like pattern and its preparation method. The glaze consists of a body, a black base glaze, and a blue-spotted glaze from the inside out. The raw materials for the black base glaze are: feldspar, calcite, calcium borate, dolomite, talc, barium carbonate, quartz, bentonite, zirconium silicate, rutile, cobalt oxide, manganese oxide, and iron oxide. The raw materials for the blue-spotted glaze are: feldspar, limestone, alumina, talc, barium sulfate, Datong clay, zinc oxide, quartz, and titanium dioxide. The preparation method includes: 1. Wet ball milling the black base glaze raw materials to obtain a black base glaze slurry; 2. Wet ball milling the blue-spotted glaze raw materials to obtain a blue-spotted glaze slurry; 3. Bisque firing the body; 4. Applying the black base glaze slurry to the body and drying it; 5. Applying the blue-spotted glaze slurry to the body and drying it; 6. Oxidation firing and reduction firing of the body, followed by natural cooling to obtain the black-based blue-spotted glaze. The raw material formula of this invention is reasonable and environmentally friendly, which can improve the mechanical properties of the glaze; the preparation method is simple and the yield is high.

The invention relates to the technical field of preparation of sodium-ion battery electrode materials, in particular to an oxygen reduction function NaxCoO2 surface modified sodium-ion battery layered oxide positive electrode material and a preparation method thereof.The positive electrode material takes NaNixFeyMnzO as a matrix, cobalt salt and alkali liquor are mixed in absolute ethyl alcohol, and the sodium-ion battery layered oxide positive electrode material is prepared. The cobalt ions are driven by electrostatic adsorption to preferentially form a cobalt hydroxide coated precursor layer on the surface of the substrate, and the NaxCoO2 coating modified sodium ion battery layered oxide positive electrode material is obtained through high-temperature sintering; according to the coating, the performance of the battery is improved through a triple synergistic mechanism: a Co < 3 + > / Co < 4 + > multivalent state is utilized to reduce a movable active oxygen species formed in a charging process into immovable O < 2->, and lattice oxygen precipitation is inhibited; the direct contact between the electrode and the electrolyte is reduced, and the electrode / electrolyte interface side reaction is inhibited; the material has a sodium ion / electron conduction function, and the rate capability of the material is improved. The capacity retention rates of the material prepared by the invention are respectively 81.2% and 55.9% after the material is circulated for 500 times under the voltage of 4.0 V and 4.3 V, the cycle life is long, and the preparation process is simple and controllable.