697results about "Titanium compounds" patented technology

The invention provides a coated modified high-nickel ternary positive electrode material, a preparation method and a lithium ion battery, the coated modified high-nickel ternary positive electrode material comprises a high-nickel ternary matrix and a coating layer containing an oxide solid electrolyte, the coating layer is coated outside the high-nickel ternary matrix and accounts for 1%-3% of the mass of the high-nickel ternary matrix; the oxide solid electrolyte comprises Li < 3x > La < 2 / 3-x > TiO < 3 > (0 lt; x < = 0.16), Li < 7 > La < 3 > Zr < 2 > O < 12 >, Li < 1 + y > Al < y > Ti < 2-y > (PO < 4 >) < 3 > (0 lt; y < = 0.5); the ionic conductivity of the oxide solid electrolyte is greater than or equal to 1 * 10 <-4 > S / cm. The selected oxide solid electrolyte has high ionic conductivity and electronic insulativity, a rapid lithium ion transmission channel can be provided, interface side reaction can be inhibited, the rate capability and the cycling stability of the material can be remarkably improved, and when the oxide solid electrolyte forms a coating layer, the coating layer is not prone to deformation, and the service life of the material is prolonged. The interface bonding strength with a high-nickel ternary matrix can be improved through chemical bonding, the interface impedance can be remarkably reduced, and the dynamic performance of the material is improved.

The invention relates to a lithium manganese iron phosphate positive electrode material and a preparation method thereof, a positive plate and a battery, and belongs to the technical field of methods or devices for directly converting chemical energy into electric energy. The lithium manganese iron phosphate positive electrode material comprises an inner core, a first coating layer arranged on the surface of the inner core and a second coating layer arranged on the surface of the first coating layer, the inner core is lithium manganese iron phosphate I, the first coating layer comprises lithium manganese iron phosphate II, and the second coating layer comprises a carbon material and an inorganic solid electrolyte. The lithium manganese iron phosphate positive electrode material not only can endow a battery with relatively high energy density, but also can endow the battery with excellent cycle performance.

The invention relates to a sodium ion battery, and belongs to sodium ion batteries. The battery cell of the sodium-ion battery comprises a positive plate, a negative plate and an electrolyte, the active material of the positive plate is carbon-coated aluminum-doped sodium ferric sulfate; the chemical formula of the aluminum-doped sodium ferric sulfate is Na < 2 + 2y > Fe < 2-x-y > Al < x > (SO4) 3, x is more than or equal to 0.01 and less than or equal to 0.05, and y is more than or equal to 0.1 and less than or equal to The particle size of the carbon-coated aluminum-doped sodium ferric sulfate ranges from 50 nm to 100 nm; the weight ratio of a carbon coating layer in the carbon-coated aluminum-doped sodium ferric sulfate is 1%-5%; the active material of the negative plate is carbon-coated sodium titanate; the specific surface area of the carbon-coated sodium titanate is 20 m < 2 > / g to 25 m < 2 > / g; the weight ratio of a carbon coating layer in the carbon-coated sodium titanate is 0.5%-3%. Volume expansion is jointly inhibited through structural stability of positive and negative electrode materials, and the cycle life is prolonged.

The invention discloses a porous lithium metatitanate type lithium ion sieve and a preparation method thereof, and belongs to the technical field of new materials. The preparation method comprises the following steps: synthesizing lithium metatitanate powder by taking titanium dioxide and lithium carbonate as raw materials through a solid-phase method; carrying out surface hydrophobic modification treatment on the lithium metatitanate powder by adopting a silane coupling agent to obtain modified lithium metatitanate powder; the preparation method comprises the following steps: by taking a water solution containing gelatin and a dispersing agent as a water phase and a mixed solution containing a styrene monomer, a divinylbenzene cross-linking agent, an initiator and a pore-forming agent as an oil phase, carrying out suspension polymerization to obtain composite particles; the composite particles are firstly eluted to remove the pore-forming agent, and then are subjected to acidification transformation, so that the lithium ion sieve with high mechanical strength, uniform particle size distribution, stable structure, good recycling effect and stable adsorption capacity is obtained, the use capability of the lithium ion sieve in the industrial application process is effectively improved, and the service life of the lithium ion sieve is prolonged. The technical problems that a powdery lithium ion sieve is high in solution loss, difficult to filter and the like are solved.

The invention discloses a double-site doped titanium lithium ion sieve adsorbent as well as a preparation method and application thereof. The adsorbent is a lithium removal product of a double-site doped titanium lithium ion sieve adsorbent precursor, the chemical general formula of the double-site doped titanium lithium ion sieve adsorbent precursor is Li (2-x) MxTi (1-y) NyOz, M is at least one of Na < + >, K < + >, Zn < 2 + >, Co < 2 + >, Ni < 2 + >, Mg < 2 + > and Al < 3 + > and occupies Li site, N is at least one of Cr < 3 + >, Fe < 3 + >, Zr < 4 + >, Nb < 5 + >, Ta < 5 + >, V < 5 + >, Mo < 6 + > and W < 6 + > and occupies Ti site, x is larger than or equal to 0.001 and smaller than or equal to 0.5, and y is larger than or equal to 0.001 and smaller than or equal to 0.5. Metal cations are introduced to replace Li sites and Ti sites at the same time, Li site substitution enlarges interlayer spacing and improves Li < + > diffusion rate, Ti site substitution regulates local chemical bond and electron distribution, stabilizes lattice structure and enhances electron conduction, and through double-site doping, 'ion-electron 'double channels are constructed, so that a collaborative optimization effect is achieved. The double-site doped titanium lithium ion sieve adsorbent disclosed by the invention is applied to adsorption and extraction of lithium in a Bayer process sodium aluminate solution, and the adsorbent shows excellent adsorption performance.

The invention relates to an aluminum-doped lithium titanate coated ternary positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: adding a metal salt solution, a precipitator solution and a complexing agent solution into a base solution in a parallel flow manner, and carrying out a co-precipitation reaction under a stirring condition; after the coprecipitation reaction is finished, the temperature and the stirring speed are kept unchanged, the aluminum-titanium solution, the precipitant solution and the ammonia water solution are continuously mixed in a parallel flow mode, and a sphere-like hydroxide is obtained after the reaction is finished; solute in the aluminum-titanium solution comprises aluminum salt, titanium salt and hydrogen peroxide; and mixing a lithium source with the sphere-like hydroxide, and sequentially carrying out preheating treatment and heat treatment to obtain the aluminum-doped lithium titanate coated ternary positive electrode material. According to the preparation method, an aluminum-titanium solution is added in a coprecipitation reaction process to form an aluminum-doped lithium titanate precursor, so that the aluminum-doped lithium titanate coated ternary positive electrode material is obtained through heat treatment, and the interface stability is improved.

The invention belongs to the technical field of titanium alloy processing raw materials, and discloses a process and equipment for purifying potassium fluotitanate. The purification equipment comprises primary cleaning equipment, recrystallization equipment and acid treatment equipment; the primary cleaning equipment comprises a primary cleaning tank and a first filter, a material inlet of the primary cleaning tank is connected to the K2TiF6 storage tank through a pipeline, a material outlet of the primary cleaning tank is connected to the first filter through a pipeline, a liquid phase outlet of the first filter is connected to the acid treatment equipment, and a solid phase outlet of the first filter is connected to the recrystallization equipment; the recrystallization equipment comprises a stirring heater, a second filter, a cooling crystallization tank and a third filter which are connected in sequence; the acid treatment equipment comprises an acid storage tank, a neutralization tank, a fourth filter and a distillation tower which are connected in sequence. According to the purification process and equipment disclosed by the invention, residual acid can be removed, the purity of the product is improved, harmful substances can be effectively recovered and treated, the pollution to the environment is reduced, and the economic effect of enterprises is improved.

The invention belongs to the technical field of lithium ion battery materials, and discloses a perovskite type titanate material as well as a preparation method and application thereof, the structural formula of the perovskite type titanate material is AxByTiOz, an A-site element is an alkali metal element, a B-site element is a Y element and / or a lanthanide element, 0 < x < = 1, 0 < y < = 1, and x + 3y + 4 = 2z. The perovskite type titanate material meeting the chemical general formula of AxByTiOz is designed, the obtained perovskite type titanate material AxByTiOz can be used as a lithium ion battery negative electrode material, compared with a lithium titanate negative electrode, the perovskite type titanate material AxByTiOz has high energy density brought by more ideal working potential, meanwhile, compared with a graphite carbon material, the perovskite type titanate material AxByTiOz has high lithium intercalation state thermal stability, and the performance of the perovskite type titanate material AxByTiOz is improved. And high safety and high energy density of the lithium ion battery can be considered at the same time.

The invention discloses TiO2-x (F) powder, a preparation method thereof and application of the TiO2-x (F) powder in strengthening the performance of a solid hydrogen storage material, and belongs to the technical field of hydrogen storage materials and preparation of the hydrogen storage materials. The problems that an existing magnesium-based solid hydrogen storage material is high in hydrogen desorption temperature, slow in low-temperature dynamics and the like are solved. According to the preparation method, the fluorinated transition metal Ti oxide additive doped with the oxygen vacancies is prepared, electrons of Mg are captured by utilizing the strong electronegativity of F atoms on the surfaces of transition metal Ti atoms, MgF2 active catalytic species are generated in the hydrogen absorption and desorption process, and the hydrogen storage performance of MgH2 is further improved. Meanwhile, the construction of oxygen vacancies on the surface of the transition metal Ti atom can provide active sites for Mg / MgH2 nucleation growth, can greatly accelerate the flow of electrons in the hydrogen absorption / desorption process, improves the thermal / dynamic performance, and realizes the reversible hydrogen absorption / desorption of the magnesium-based hydrogen storage material at low temperature.

A positive electrode material includes: a positive electrode active material; a coating layer covering at least part of the surface of the positive electrode active material; and a second solid electrolyte. The coating layer includes a first solid electrolyte. The first solid electrolyte includes Li, M1 and F. M1 is at least one selected from the group consisting of Ti, Al and Zr. The second solid electrolyte includes Li, M2, O and X. M2 is at least one selected from the group consisting of Ta and Nb. X is at least one selected from the group consisting of F, Cl, Br and I.

In order to solve the problems that an existing positive electrode material is unstable in structure and low in energy density, the invention provides a positive electrode material and a preparation method thereof, a positive electrode plate and a battery, the positive electrode material comprises lithium cobalt oxide of a layered structure, the chemical formula of the lithium cobalt oxide is Li < 1-alpha-beta > Na < alpha > (Mg < gamma > Ti < delta > Co < 1-gamma-delta >) O2, alpha is smaller than or equal to 0.005, and beta is 0.02-0.05; gamma is equal to 0.002 to 0.004, delta is equal to 0.001 to 0.003, and gamma + delta is equal to 0.003 to 0.006.

To provide means for reducing debris in titanium phosphate powder.SOLUTION: A method for producing titanium phosphate powder includes bringing a raw titanium sulfate solution into contact with activated carbon, filtering the resulting titanium sulfate solution through a filter, and mixing the filtered titanium sulfate solution with a phosphoric acid solution to prepare a mixed solution.SELECTED DRAWING: None

The invention belongs to the technical field of preparation of barium titanate, and particularly relates to nanoscale tetragonal-phase barium titanate and a confinement preparation method thereof. The preparation method comprises the following steps: pumping a solution of barium titanium salt and a solution of a precipitator into a mixing reactor of a microchannel reactor for confinement mixing, and aging the obtained mixed slurry to obtain a barium titanate precursor; the flow velocity of the solution of the barium titanium salt and the flow velocity of the solution of the precipitant are independently 20-70 mL / min; and mixing the barium titanate precursor, a barium source and water for hydrothermal reaction to obtain the nanoscale tetragonal-phase barium titanate. The method can be used for efficiently and stably preparing the nanoscale tetragonal barium titanate which is small in size, high in crystallinity, high in particle size uniformity, narrow in particle size distribution and high in tetragonal phase purity.

The invention discloses an oxide solid electrolyte coated lithium manganese iron phosphate positive electrode material and a preparation method thereof, and relates to the technical field of lithium manganese iron phosphate preparation. The lithium manganese iron phosphate battery comprises a lithium manganese iron phosphate core and an oxide solid electrolyte coating layer, the oxide solid electrolyte coating layer comprises Li < 7 > La < 3 > Zr < 2 > O < 12 > (LLZO), Li < 6.75 > La < 3 > Zr < 1.75 > Ta < 0.25 > O < 12 > (LLZTO, Li < 3 > x La < 2 / 3-x > TiO < 3 > (LLTO), Li < 3 > BO < 3 > (LBO) and Li < 1 + x > Al < x > Ti < 2-x > (PO4) < 3 > (LATP); the lithium manganese iron phosphate core is LiMnxFe1-xPO4, wherein x is more than or equal to 0.5 and less than or equal to 0.8; the existing main problem of lithium manganese iron phosphate is solved, the comprehensive performance is improved, and the commercial application is promoted.

The invention discloses a polydopamine modified metatitanic acid type lithium ion sieve and a preparation method thereof, and belongs to the technical field of lithium ion sieves, the preparation method comprises the following steps: grinding and uniformly mixing lithium acetate dihydrate and titanium dioxide in an organic solvent, and calcining the mixture at 650-800 DEG C for 3-5 hours to prepare a Li2TiO3 precursor; the preparation method comprises the following steps: putting dopamine hydrochloride, aminated crown ether and a Li2TiO3 precursor into a tris (hydroxymethyl) aminomethane solution with the pH value of 8-9, carrying out a constant-temperature oscillation reaction, carrying out suction filtration, and drying at low temperature, so as to obtain the polydopamine modified metatitanic acid type lithium ion sieve. According to the lithium ion sieve, the adsorption effect on lithium ions can be improved, the lithium extraction efficiency is improved, and the problem of low adsorption capacity of a lithium ion sieve in the prior art is solved.

The invention discloses a barium titanate coated Ni particle material synthesized under the assistance of a spray drying technology and a method thereof, and belongs to the technical field of metal powder material preparation. The method comprises the following steps: firstly, taking metatitanic acid and barium hydroxide as raw materials, and mixing the metatitanic acid and the barium hydroxide with nano and submicron Ni powder to prepare a mixed solution; secondly, synthesizing a Ni-based composite material intermediate by adopting a spray drying method; and finally, sintering in a tubular furnace to form the barium titanate coated Ni powder. The barium titanate coated Ni inner electrode material is Ni coated BaTiO3 spherical particles with a core-shell structure, the particles are of a core / shell microstructure, a shell layer is a barium titanate coating layer with the thickness of 10-15 nm, and the particle size of the particles is 100-150 nm. According to the method, required equipment can be scaled, components and microstructures are easy to regulate and control, and the method has high sphericity and dispersity, high compactness and good repeatability; the particle size and distribution can be changed by adjusting process parameters; meanwhile, good interface bonding with a ceramic dielectric layer is realized, and the key problems of mismatching of interlayer interface volume shrinkage, easy cracking and the like in the sintering process are relieved.

The invention relates to a negative electrode material and a high energy density sodium ion battery, the negative electrode material comprises a positive plate, a negative plate, an electrolyte and a diaphragm, the positive electrode material of the positive plate is a layered transition metal oxide with a coating layer on the surface, the negative electrode material of the negative plate is spherical hard carbon with Na2Ti6O13 coated on the surface, the electrolyte is an ether electrolyte, and the diaphragm is a lithium ion battery. And the CB value of the sodium ion battery is 0.4 to 0.8. As the capacity of the battery is determined by the capacity of the positive electrode, the capacity of the negative electrode in the unit area of the sodium ion battery is lower than the capacity of the positive electrode, so that the ratio of the negative electrode in the battery is reduced, the ratio of the positive electrode in the battery is increased, and a sodium deposition layer can be prevented from being formed on the surface of the negative electrode by selecting the specific positive electrode material, negative electrode material and electrolyte. The sodium ion battery prepared by matching the materials has relatively high energy density and cycle performance.

To provide a conductive paste for an internal electrode of a layered ceramic capacitor, which is capable of maintaining relatively high coverage even if the internal electrode constitutes a thin layer.SOLUTION: Provided is a conductive paste for forming internal electrodes 4 and 5 of a layered ceramic capacitor 1 fabricated through a firing step. The conductive paste includes conductive metal powder, ceramic powder, an organic solvent, and an organic binder. The conductive metal powder contains a silver / palladium alloy. At least a portion of the ceramic powder comprises an ABO3 type oxide having a specific ion radius in which the ratio of the ion radius in the 6-coordination of an element at the A site in ABO3 with respect to the ion radius in the 6-coordination of a metal element contained in the conductive metal powder is 0.96 or more and 1.10 or less.SELECTED DRAWING: Figure 1

To provide a highly dispersible sol containing metal oxide particles and a plurality of polymerizable functional group-containing silanes, and a varnish containing a thermosetting or photocurable resin using the same.　Provided is a metal oxide sol containing a silane compound and metal oxide particles, wherein the silane compound is represented by formula (1): (in formula (1), R1 each independently represent an alkoxy group, an acyloxy group, or a halogen group; R2 each independently are an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 30 carbon atoms; R3 is a hydrogen atom or a methyl group; A1 is an alkylene group; A2, A3, and A4 each independently are a methylene group or an oxygen atom; one of A2, A3, and A4 is an oxygen atom; and n is an integer of 1 to 3.). The varnish contains the metal oxide sol and a thermosetting or photocurable resin. The varnish is used for nanoimprinting.

This method for producing a halide solid electrolyte of the present disclosure includes (A) halogenating a raw material, containing a carbonate of at least one metal element selected from the group consisting of Li and M, by heat treatment to obtain a halide solid electrolyte containing Li, M, and X. Here, M is at least one element selected from the group consisting of metal elements (excluding Li) and semimetal elements, and X is at least one selected from the group consisting of F, Cl, Br, and I.

The present invention provides an ion-conducting solid containing an oxide characterized by the general formula Li 6+a-c-2d Y 1-a-b-c-d M1 a M2 b M3 c M4 d B3O9 is represented. (In the formula, M1 represents at least one metallic element selected from a group consisting of Mg, Mn, Zn, Ni, Ca, Sr, and Ba; M2 represents at least one metallic element selected from a group consisting of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, In, and Fe; M3 represents at least one metallic element selected from a group consisting of Hf, Sn, and Ti; M4 represents at least one metallic element selected from a group consisting of Nb and Ta; and a, b, c, and d represent real numbers, each within certain ranges, while satisfying 0.010 ≤ a + b + c + d < 1.000.)

A method for producing a halide solid electrolyte according to the present disclosure comprises (A) subjecting an oxide mixture that contains a composite oxide containing Li and Ti and an oxide starting material containing Li and M to a halogenation treatment so as to obtain a halide solid electrolyte which contains Li, Ti, M, and X. Here, M represents at least one element that is selected from the group consisting of metal elements (excluding Li and Ti) and metalloid elements, and X represents at least one element that is selected from the group consisting of F, Cl, Br, and I.

The invention discloses a high-magnification sodium ferric phosphate pyrophosphate-barium titanate positive electrode material and a preparation method thereof, the high-magnification sodium ferric phosphate pyrophosphate-barium titanate positive electrode material comprises nano barium titanate compounded with sodium ferric phosphate pyrophosphate in situ, the sodium ferric phosphate pyrophosphate is of a porous structure, and the mass ratio of barium titanate in the porous sodium ferric phosphate pyrophosphate is 0.5-6 wt%. The nano barium titanate is introduced into the porous ferric sodium phosphate pyrophosphate through an in-situ compounding technology, so that the rate capability, the cycle capability and the ionic conductivity of the ferric sodium phosphate pyrophosphate-barium titanate positive electrode material are remarkably improved, and the rate capability during high-current charging and discharging is particularly optimized; and effective support is provided for high-power output in a short time and stability of long-time circulation.

The invention provides a europium ion doped titanate compound as well as a preparation method and application thereof, and relates to the technical field of rare earth luminescent materials. The chemical formula of the titanate compound provided by the invention is K2Ti6O13: xEu < 3 + >, the titanate compound is in a monoclinic system. A proper amount of Eu < 3 + > ions are doped in K2Ti6O13, so that the prepared rare earth fluorescent powder has higher color rendering index and quantum yield, and the luminescent property of a white light LED can be greatly improved; as K2Ti6O13 has good electrochemical performance and relatively high conductivity, the rare earth fluorescent powder provided by the invention can also be used in the fields of illumination, display, photocatalysis and energy storage. And on the other hand, the preparation method provided by the invention is simple in process, mild in condition, convenient for large-scale production and wide in development and application space.

The invention provides composite coated high-stability lithium-rich lithium ferrite and a preparation method thereof, and belongs to the field of lithium ion battery positive electrode lithium supplements.The preparation method of the composite coated high-stability lithium-rich lithium ferrite comprises the steps that an iron source and a lithium source are mixed, and a first mixture is obtained; performing first calcining treatment on the first mixture to obtain a calcined product; mixing and dispersing the calcined product and a metal compound to obtain a second mixture; carrying out second calcining treatment on the second mixture to obtain composite coated high-stability lithium-rich lithium ferrite; wherein the ratio of the amount of substance of the lithium element in the lithium source to the amount of substance of the iron element in the iron source is greater than 5. According to the method, excessive lithium sources are introduced, so that a large amount of residual lithium on the surface of Li5FeO4 forms a residual alkali layer, the residual alkali layer is converted into a compact and complete metal lithium oxide coating layer under the action of the metal compound and the second calcination treatment, and the air stability of Li5FeO4 is effectively improved.

The invention belongs to the technical field of sulfur recovery, and particularly relates to an organic sulfur hydrolysis synergistic sulfur recovery catalyst as well as a preparation method and application thereof. Comprising the following steps: (1) dissolving strontium salt; (2) adding transition metal salt; (3) adding a titanium source; (4) adding an alkali metal compound; (5) stirring reaction; (6) hydro-thermal treatment; and (7) centrifuging, washing, drying and roasting. The general formula of the prepared catalyst is SrTi (1-x) MxO3, in the formula, x is equal to 0.05-0.2, and M is a transition metal element. The prepared catalyst is high in material composition and structure adjustability, rich in surface acid-base sites, excellent in organic sulfur hydrolysis reaction activity and H2S selective oxidation activity, and capable of realizing efficient and synergistic proceeding of organic sulfur hydrolysis and H2S selective oxidation and removing sulfur-containing components in process gas in one step.

A positive electrode material 1000 in one embodiment of the present disclosure comprises a positive electrode active material 110, a coating layer 111 that includes a first solid electrolyte and covers at least part of the surface of the positive electrode active material 110, and a second solid electrolyte 100. The first solid electrolyte contains Li, M1, and F. M1 is at least one selected from the group consisting of Ti, Al, and Zr. The second solid electrolyte 100 contains Li, M2, O, and X. M2 is at least one selected from the group consisting of Ta and Nb. X is at least one selected from the group consisting of F, Cl, Br, and I.

[Summary] [Problem] A reductant usable for reactions at high temperatures and a gas production method using the reductant are provided. [Solution] According to an aspect of the present disclosure, a reductant that reduces carbon dioxide and generates a carbon valuable substance by contact is provided. This reductant includes an oxygen carrier composed of metal oxide including cerium (Ce) and a transition element other than cerium (Ce), and having oxygen ion conductivity. When performing X-ray diffraction measurement of the oxygen carrier, a peak position of at least one diffraction peak corresponding to a (220) face is shifted with respect to a peak position of a diffraction peak of cerium oxide (CeO2) corresponding to a (220) face in an X-ray diffraction profile.

The present invention relates to a positive electrode active material for an all-solid-state battery, a positive electrode, and an all-solid-state battery comprising the same. More specifically, the positive electrode active material of the present invention has, on a surface thereof, a particle layer coated with lithium titanium oxide particles, in which the particle layer prevents a side reaction between the positive electrode active material and sulfide-based solid electrolyte particles in a positive electrode, thereby enabling an all-solid-state battery to be stably charged and discharged.

A method for producing a fluoride according to the present disclosure comprises firing a mixture containing a titanium oxide, an aluminum oxide, a raw material fluoride having a composition different from that of the produced fluoride, and a lithium-containing compound in an inert gas atmosphere. The titanium oxide contains TiO2. The aluminum oxide contains Al2O3. The raw material fluoride contains NH4F. The lithium-containing compound includes at least one selected from the group consisting of lithium fluoride, lithium carbonate, and lithium nitrate.