77results about "Titanates" patented technology

The invention discloses a carbon-silicon negative electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: S1, carrying out mixed reaction on a lithium source compound, a lanthanum source compound and a titanium source compound to obtain a mixed reactant; mixing the mixed reactant with a carbon source compound, and dispersing and emulsifying to obtain element-doped microspheres; s2, carbonizing the element-doped microspheres in the step S1 to obtain carbides, and activating the carbides to obtain a porous carbon material; and S3, performing silicon deposition on the porous carbon material in the S2 to obtain silicon deposition porous carbon, and performing carbon deposition on the silicon deposition porous carbon to obtain the carbon-silicon negative electrode material. The carbon-silicon negative electrode material disclosed by the invention is high in lithium ion transmission rate, the problem of poor electronic conductivity of silicon is solved, and the electrical property of a battery can be effectively improved.

The invention provides a preparation method of magnesium niobate, which comprises the following steps: carrying out wet ball milling on MgO and Nb2O5, uniformly mixing, and drying to obtain mixed powder; the mixed powder is heated to 1500-1700 DEG C for 1-3 h and then subjected to water quenching, and solid particles of a core-shell structure inclusion are obtained; and heating the solid particles to 1000-1200 DEG C, and carrying out heat preservation to obtain the magnesium niobate. Solid particles of a core-shell structure inclusion are formed through a water quenching process, then MN obtained through rapid heating sintering is high in purity and stability, Mg < 2 + > and Nb < 5 + > in the MN are high in uniformity and large in reaction activity, sufficient mixing with PbO and TiO2 at a high temperature is facilitated to form a liquid phase, the formed raw material for PMNT crystal growth is better in singleness and uniformity, and the preparation method is simple and easy to implement. Furthermore, the PMNT single crystal with a single perovskite structure, high purity and excellent piezoelectric property can be obtained, and the yield is improved.

The invention belongs to the technical field of all-vanadium redox flow battery electrodes, and discloses a graphite felt electrode for a vanadium battery and a preparation method and application of the graphite felt electrode. Preparing a spinel composite graphite felt; preparing a spinel inlaid perovskite composite graphite felt electrode; preparing a composite graphite felt electrode; the nano petal-shaped spinel composite perovskite nanospheres are synthesized by adopting an electro-deposition and sol-gel method, the structure is stable, the effective active area is increased, the oxidation reduction capacity of vanadium is catalyzed, the reaction energy barrier is reduced, the precipitation amount of oxygen and hydrogen in an electrolyte is effectively reduced, the oxygen evolution / hydrogen evolution side reaction is inhibited, the utilization rate of the electrolyte is improved, and the service life of the electrolyte is prolonged. And the energy loss generated by side reaction during battery operation is reduced.

The invention relates to a flame-retardant cellulose composite film and a preparation method thereof, belongs to the field of flame-retardant materials, and aims to solve the problems that a cellulose film is inflammable, poor in compatibility with an inorganic flame retardant, relatively low in mechanical property and the like. The main components of the composite membrane comprise nanocellulose, titanate nanofibers, carbon dots and a cross-linking agent. The preparation method comprises the following steps: firstly, enabling the carbon dots to react with the nanocellulose under the action of an initiator; secondly, adding titanate nanofibers into the carbon dot modified nanocellulose suspension, and uniformly mixing; then, adding a cross-linking agent and uniformly dispersing to obtain a mixed solution; and finally, casting the solution into a culture dish, and curing in a vacuum drying oven to prepare the flame-retardant cellulose composite film. According to the preparation method, the compatibility of the flame retardant and the nano cellulose is remarkably improved, the mechanical property is enhanced, and the composite film has excellent flame retardance, smoke suppression and heat insulation characteristics and is suitable for preparing the flame-retardant cellulose composite film.

The invention relates to a sodium electrode layered oxide and a preparation method and application thereof. The sodium electrode layered oxide comprises a positive electrode material and a coating layer on the particle surface of the positive electrode material, the coating layer comprises perovskite and sodium metaaluminate. The sodium electrode layered oxide provided by the invention has a uniform composite coating layer comprising perovskite and sodium metaaluminate, and by combining interface gradient doping, the cycling stability of a positive electrode material under high voltage can be remarkably improved.

The invention provides an anion-doped perovskite type titanate material and a preparation method and application thereof, the structural formula of the anion-doped perovskite type titanate material is AxByTiOzN1-z, A is an alkali metal element, B is a rare earth element, N is an anion element, 0 lt; x is less than or equal to 1, 0lt; y < = 1, 0lt; z < = 4. The prepared anion-doped perovskite type titanate material is applied to a negative electrode of a lithium ion battery, and compared with a traditional perovskite type titanate material, the anion-doped perovskite type titanate material has better fast charging performance and power characteristics, ultra-long cycle life and excellent safety.

The invention provides a preparation method of a composite solid electrolyte coated positive electrode material. According to the invention, the silicon coupling agent is coated on the solid electrolyte, and a reticular retaining layer containing organic silicon is formed on the surface of the solid electrolyte, so that the stability of a material interface is effectively stabilized, the electrolyte is prevented from corroding an electrode material, and the rate capability and the cycling stability of a lithium-rich material are greatly improved. Then a cationic polymer is selected as a base membrane to be assembled into two layers of hybrid membranes to coat the outermost layer of the solid electrolyte, and then the crown ether lithium salt complex is introduced into the surface of the phospholipid / cationic polymer hybrid membrane, so that the occurrence of side reactions on the surface of an electrode is effectively inhibited, the structure of an active material is stabilized, and meanwhile, the thermal stability of the membrane is improved; and finally, the surface of the positive electrode material is coated with the composite solid electrolyte.

The application relates to an aluminum-doped lithium titanate-coated ternary positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: adding metal salt solution, precipitant solution and complexing agent solution into a bottom liquid in parallel flow, and performing a coprecipitation reaction under stirring conditions; after the coprecipitation reaction is completed, the temperature and stirring speed are kept unchanged, aluminum-titanium solution, precipitant solution and ammonia solution are continuously mixed in parallel flow, and a spherical hydroxide is obtained after the reaction is completed; solutes in the aluminum-titanium solution include aluminum salt, titanium salt and hydrogen peroxide; a lithium source is mixed with the spherical hydroxide, and preheating treatment and heat treatment are sequentially performed to obtain the aluminum-doped lithium titanate-coated ternary positive electrode material. The preparation method adds the aluminum-titanium solution in the coprecipitation reaction process, forms an aluminum-doped lithium titanate precursor, and thus the aluminum-doped lithium titanate-coated ternary positive electrode material is obtained through heat treatment, and the interface stability is improved.

The present invention relates to a potassium magnesium titanate capable of increasing the friction coefficient of a high load region when used in a friction material, the potassium magnesium titanate being represented by the compositional formula KxMg0. 4Ti1. 6O4-y in which x is 0.1 < = x < = 0.6 and y = (0.8-x) / 2, the ratio (Ia / Ib) of the peak area (Ia) at 100 cm <-1 > to 165 cm <-1 > to the peak area (Ib) at 215 cm <-1 > to 1-325 cm <-1 > in the Raman spectrum of the potassium magnesium titanate being 0.03 or more, and the ratio (Ia / Ib) of the peak area (Ib) at 215 cm <-1 > to 325 cm <-1 > being 0.03 or more. The ratio (Ic / Ib) of the peak area (Ic) at 785 cm <-1 > to 900 cm <-1 > to the peak area (Ib) at 215 cm <-1 > to 325 cm <-1 > is 0.40 or less.

The invention discloses a method for preparing a flaky PbTiO3 template, and relates to the technical field of PbTiO3 preparation, and the method comprises the following steps: preparing pure flaky Bi4Ti3O12, preparing a flaky PbBi4Ti4O15 precursor, preparing flaky PbTiO3, and preparing the pure flaky PbTiO3 template. According to the preparation method, flaky Bi4Ti3O12 is prepared from TiO2 and Bi2O3, flaky PbBi4Ti4O15 is prepared from the flaky Bi4Ti3O12, PbO and TiO2, flaky PbTiO3 is prepared from PbBi4Ti4O15 and PbO, a PbTiO3 template with a complete and stable flaky crystal structure is prepared based on a three-step molten salt method, the PbTiO3 template does not react with a matrix at high temperature, lead-based crystal grains are induced by the flaky PbTiO3 template to form oriented growth, and the textured lead-based piezoelectric ceramic is successfully formed. And the shortages existing in the traditional method are solved.

The invention discloses a piezoelectric nanomaterial for triggering mitochondrial fusion and a preparation method and application thereof, and belongs to the technical field of biology, and the piezoelectric nanomaterial provided by the invention can supplement electron depolarization mitochondrial membrane potential (delta psi) in a targeted manner under ultrasonic stimulation. The depolarization of the delta psi significantly promotes the mitochondrial fusion and inhibits the fission of the mitochondrial by activating mechanisms such as long optic nerve atrophy 1 (OPA1) and calcium ion influx, so that mitochondrial fusion proteins mitofusin 1 (Mfn1) and mitofusin 2 (Mfn2) are activated, the recruitment of dynamic protein related protein 1 (Drp1) is inhibited, the expression of mitochondrial fission protein 1 (Fis1) is reduced, and a JC-1 dye evaluates the delta psi, so that the depolarization of the delta psi is realized. The observed mitochondrial dynamic change is in positive correlation, the mitochondrial fusion is regulated by using the nano material, and a new method is provided for targeting tumor metabolism and improving cancer treatment results.

The present invention belongs to the technical field of nitrate reduction, and provides a copper-based perovskite nanofiber, a preparation method thereof, and application thereof in electrocatalytic reduction of nitrate. La(NO3)3·6H2O, Co(NO3)2·6H2O, and Cu(NO3)2·3H2O are added to a mixed solvent and stirred to obtain a precursor solution; the precursor solution is electrostatically spun to obtain nanofibers, and the nanofibers are calcined to obtain copper-based perovskite nanofibers. The LaCu x Co 1‑x O3 perovskite nanofibers are used as electrocatalysts for the electrocatalytic reduction of nitrate to produce ammonia. Copper-based perovskite nanofibers provide abundant active sites and contact areas in the electrocatalytic reduction of nitrate, have excellent performance in the electrocatalytic reduction of nitrate, have good cycle stability, practicality and long-term development prospects, and can solve the problem of excessively high nitrate content in wastewater.

The invention relates to the technical field of lithium battery positive electrode materials, in particular to a lithium lanthanum titanate epitaxial growth and titanium / lanthanum doping regenerated waste lithium cobalt oxide positive electrode material and a preparation method thereof.La3 + and Ti4 + gradient doping layers are arranged in regenerated lithium cobalt oxide particles, and the regenerated lithium cobalt oxide particles are formed through a three-dimensional crack network of waste lithium cobalt oxide; a Li < 3x > La < 2 / 3-x > TiO3 coating layer is epitaxially grown on the surface of the particle; the gradient doping layer broadens a lithium ion transmission channel, and the Li3xLa2 / 3-xTiO3 coating layer is used as a fast ion channel. According to the invention, a sol-gel method is used, a lithium source, a titanium source and a lanthanum source are uniformly attached to the surface of a material, and then high-temperature sintering is carried out, so that epitaxial growth of Li3xLa2 / 3-xTiO3 and gradient doping of La3 + / Ti4 + are realized while material structure repair is completed. A three-dimensional fast ion channel is provided for the deintercalation and intercalation of Li < + >, and the regenerated lithium cobalt oxide positive electrode material with excellent electrochemical performance is obtained.

This invention relates to the field of sodium-ion battery technology, specifically to Na... 0.86 Cu 0.43 Ti 3.57 O8 nanowires, their preparation method, and their application in sodium-ion batteries. This invention aims to solve the problems disclosed in the prior art regarding Na... 0.86 Cu 0.43 Ti 3.57 To address the technical shortcomings of high preparation temperatures and poor safety in existing O8 material preparation methods, a method for preparing Na using electrospinning is provided. 0.86 Cu 0.43 Ti 3.57 A new method for producing O8, and the resulting Na 0.86 Cu 0.43 Ti 3.57 O8 nanowires are used as anode materials for Na-ion batteries.

The embodiment of the invention relates to a solid electrolyte material and a preparation method and application thereof, and the preparation method comprises the following steps: adding a source A, a source B, a source C, a source D, a source E and a source H into a first solvent, and carrying out first ball-milling mixing to obtain mixed slurry; carrying out spray drying treatment on the mixed slurry to obtain a precursor material; placing the precursor material in sintering equipment for sintering treatment to obtain the oxide solid electrolyte; ball-milling, washing and drying a second solvent, alkali metal salt and the oxide solid electrolyte for the second time, so that dangling bonds are exposed on the surface of the oxide solid electrolyte, nitrile groups, ester groups and / or ether bonds in the second solvent can be chemically bonded with the dangling bonds, and a coating layer is formed on the surface of the oxide solid electrolyte, therefore, the solid electrolyte material is obtained.

The invention belongs to the technical field of sensors, and discloses a gas sensitive material and a preparation method thereof, a solid electrolyte gas sensor and a refrigerator. The gas sensitive material comprises AxBy (TiO3) n, x: y = (1-100): (1-100), n is greater than or equal to 1 and less than or equal to 400, and A and B respectively comprise any one of Fe, Co, Ni, Cu, Zn, Mn and Cd. By adopting the gas sensitive material provided by the invention, the sensitivity, selectivity and service life of the solid electrolyte gas sensor can be improved.

The present application provides a modified electrolyte and a preparation method therefor, an electrode material, and a battery. The modified electrolyte comprises a basic electrolyte and metal particles attached to the surface of the basic electrolyte; the material of the metal particles comprises one or more of a nickel element, a copper element, a tin element, an iron element, a cobalt element and a precious metal element. According to the modified electrolyte provided by the present application, a specific solid electrolyte is used as the basic electrolyte, the surface of the basic electrolyte is modified with the metal particles, the electronic conductivity of the modified electrolyte is effectively improved by means of cooperation of the basic electrolyte and the metal particles, and the positive electrode material containing the modified electrolyte can simultaneously improve the effective transmission of ions and electrons, such that the battery having the positive electrode material has both low interface impedance and good electrochemical performance.

Polyoxotitanate comprising a metal oxide core and a ligand shell, wherein the metal oxide core comprises titanium, oxygen, and a lanthanide, and the ligand shell comprises one or more light-harvesting

The invention relates to a pure-crystalline-phase nano-sized magnesium titanate ceramic powder material and a preparation method thereof, the material is nano-sized magnesium titanate nano-ceramic powder with an irregular-shaped pure-crystalline-phase structure, the particle size of the material is 50-100nm, the particle size D50 is less than 100nm after drying and crushing treatment, and the specific surface area is 2-20m < 2 > / g. Compared with the prior art, the preparation process is simple and convenient to operate, extra complex conditions and complex equipment are not needed, the reaction can be carried out by stirring at normal temperature and pressure, and the practical raw materials are cheap and easy to obtain, so that the preparation cost of the material is relatively low; and the prepared magnesium titanate can be used for manufacturing electronic ceramic devices, filter ceramic devices and the like.

The invention relates to a preparation method and application of a sulfur-doped ZnTiO3 / g-C3N4 heterojunction photocatalyst, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: preparing ZnTiO3 by adopting a sol-gel method, preparing g-C3N4 by adopting a calcination method, uniformly stirring ZnTiO3, g-C3N4 and a sulfur-rich precursor, and carrying out hydrothermal treatment to obtain the sulfur-doped ZnTiO3 / g-C3N4 heterojunction photocatalyst which can be applied to the field of photocatalytic hydrogen evolution. Compared with an existing photocatalyst, the sulfur-doped ZnTiO3 / g-C3N4 heterojunction photocatalyst disclosed by the invention is good in controllability and high in stability, has a good light absorption characteristic, is beneficial to preventing photogenerated electrons and hole recombination, and further improves the separation efficiency of current carriers. The method is green and environment-friendly, simple, convenient to operate and low in material preparation cost, conforms to the green and environment-friendly concept advocated at present, and has a wide application market prospect.

The invention provides a high voltage material with single crystal particle morphology, the high voltage material comprises, by mass, 97.5%-99.5% of a main material, 0.3%-1.0% of a dopant and 0.2%-1.5% of a cladding material, the chemical formula of the main material is LixNi1-y-zCoyMnzO2, 0.95 < = x < = 1.15, 0.1 < = y < = 0.30, 0.2 < = z < = 0.40, the dopant is doped in the main material, the dopant is selected from one or more of Ba, Ca, Ti, Sr, Nb, W, Mg, Zr and Al, and the cladding material is coated with the dopant. The coating material is coated on the surface of the main material, and the coating material is selected from one or more of Al2TiO5, ZrTiO4 and MgTiO3. In the preparation process, solid compounds are adopted for mixing, and doping elements are introduced at one time, so that the prepared high-pressure material has a single-crystal morphology, and is high in compaction density, high in energy density, low in residual alkali amount and good in processability. The battery prepared from the high-voltage material disclosed by the invention not only has relatively high cycle performance, but also improves the cycle performance and safety performance of the battery due to the fact that the surface of the main material is coated with the coating layer.

The invention discloses an electronic grade lead titanate and a preparation method thereof, comprising the following steps: S1, adding tetrabutyl titanate to ethanol, stirring evenly, and obtaining a tetrabutyl titanate solution; S2, adding lead acetate to deionized water, stirring evenly, and obtaining a lead acetate solution; S3, adding the lead acetate solution in step S2 to the tetrabutyl titanate solution in step S1, then adding a composite surfactant, adjusting the pH, stirring and reacting, and obtaining a sol after the reaction is completed; S4, aging, drying, grinding, calcining the sol in step S3, and then washing and drying to obtain the electronic grade lead titanate. The lead titanate prepared by the method has high purity, small particle size, large specific surface area, and expanded application fields of lead titanate.

The invention discloses a method for preparing magnesium titanate with controllable particle size, which belongs to the field of magnesium titanate preparation. The preparation process is as follows: after magnesium oxide and titanium dioxide are evenly mixed, deionized water is added for wet ball milling, a dispersant is added to the mixed slurry for continued ball milling, and then drying is performed, first placed in a sagger, and then pre-sintered and high-temperature sintered in a push plate kiln, and finally cooled and ball milled and sieved to obtain the final product, magnesium titanate powder. The present invention improves the existing preparation process, can be controlled at a certain micron scale, and synthesized magnesium titanate powder with uniform particle size is prepared, ball milling and sintering processes are used for processing, which greatly saves the process flow, the process is simpler and more convenient, the finished product quality control is more stable, the product particle size is smaller, the reflectivity is higher, it has better pigment performance, and the scope of application is wider.

A cathode active material for a lithium secondary battery includes a lithium-aluminum-titanium oxide formed on a surface of a lithium metal oxide particle having a specific formula. The cathode active material may have an improved structural stability even in a high temperature condition.

The present application belongs to the technical field of all-vanadium liquid flow battery electrodes, and discloses a graphite felt electrode for vanadium battery and a preparation method and application thereof, comprising the following steps: graphite felt pretreatment; preparation of spinel composite graphite felt; preparation of spinel-embedded perovskite composite graphite felt electrode; preparation of composite graphite felt electrode; and synthesis of nano-petal-shaped spinel composite perovskite nanospheres by electroplating + sol-gel method, which have a stable structure, an increased effective active area, catalyze the redox ability of vanadium, reduce the reaction energy barrier, effectively reduce the amount of oxygen and hydrogen released in the electrolyte, inhibit oxygen evolution / hydrogen evolution side reactions, improve the utilization rate of the electrolyte, and reduce the energy loss caused by side reactions during battery operation.

The present invention discloses a method for preparing carbon-intercalated potassium magnesium titanate, comprising the following steps: immersing flaky potassium magnesium titanate in an acid solution containing copper ions with a pH of 3 to 5 for 1 to 24 hours; washing the solution until neutral to obtain a neutral solution; adding polyethanolamine to an alkaline potassium permanganate solution to obtain an alkaline solution of polyethanolamine; gradually adding the alkaline solution of polyethanolamine dropwise to the neutral solution, reacting at 60 to 80°C for 1 to 12 hours; washing the solution until neutral, and calcining it at 800 to 1000°C for 2 to 12 hours to obtain the carbon-intercalated potassium magnesium titanate. The present invention finds that when the carbon-intercalated potassium magnesium titanate is used as a friction material, the brake noise caused by friction between the carbon-intercalated potassium magnesium titanate and the brake disc is significantly reduced.

Provided is a magnesium potassium titanate capable of increasing, when used in a friction material, the coefficient of friction of the friction material in a high-load region. A magnesium potassium titanate is represented by a composition formula KxMg0.4Ti1.6O4-y [where 0.1 ≤ x ≤ 0.6 and y = (0.8-x) / 2], wherein, in terms of Raman spectrum, a ratio (Ia / Ib) of a peak area (Ia) in a range of 100 cm-1 to 165 cm-1 to a peak area (Ib) in a range of 215 cm-1 to 325 cm-1 is not less than 0.03 and a ratio (Ic / Ib) of a peak area (Ic) in a range of 785 cm-1 to 900 cm-1 to the peak area (Ib) in the range of 215 cm-1 to 325 cm-1 is not more than 0.40.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to multielement oxides. In one aspect, the multielement oxides have the AlTiXLiO, wherein X is Mg, Ni, Mn Cu, or any combination thereof. The multielement oxides are useful in preparing polymeric compositions having good mechanical and electrical properties, which makes them useful in lithium ion batteries.

The technical field of a NMBT basic system unit with topological insulator phase transition characteristics The present invention relates to the multi-disciplinary field of electronic materials, and describes a composite molecular structure composed of different physical properties of manganese-based NdBaMnO3 (NM) and titanium-based BaNdTiO3 (BT), and NMBT particles and thin film structures composed of the same, a NMBT basic system unit, which has the technical and method of topological insulator phase transition characteristics under the action of an electric field, and the occurrence of the giant magnetoresistance effect, anomalous Hall effect and abnormal dielectric effect at room temperature.

Methods of manufacturing polyoxotitanates, polymer-polyoxotitanate composite materials and novel polyoxotitanates are provided. The invention enables spectral conversion of sunlight towards longer wavelengths, which is beneficial for increasing 5 available photons for photosynthesis.