135results about "Tantalum compounds" patented technology

A modified lithium-rich manganese-based positive electrode material, and a preparation method therefor and the use thereof. The modified lithium-rich manganese-based positive electrode material comprises a lithium-rich manganese-based positive electrode material, wherein the bulk phase of the lithium-rich manganese-based positive electrode material is doped with a high-valent transition metal element, and the surface phase of the lithium-rich manganese-based positive electrode material has a lithium metal compound coating layer and an oxygen vacancy. In the modified lithium-rich manganese-based positive electrode material, the doping with a bulk-phase high-valence transition metal element, the coating with a surface-phase lithium metal compound coating layer and the construction of an oxygen vacancy are conducted at the same time; and by means of the co-action of the three, the rate capability and the cycling performance of the lithium-rich manganese-based positive electrode material can be significantly improved, which is of great significance for the further commercialization of the lithium-rich manganese-based positive electrode material.

A solid electrolyte contains Li, Mα, Mβ, Mγ, Cl, and O. Mα is at least one element selected from the group consisting of Zr and Hf, Mβ is at least one element selected from the group consisting of Ta and Nb, and Mγ is at least one element selected from the group consisting of Gd, Yb, Dy, Er, Ho, Eu, and Sc. This provides the solid electrolyte with high ionic conductivity and high stability.

The invention relates to an O2-phase lithium cobalt oxide positive electrode material and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The preparation method comprises the following steps: S1, uniformly mixing a doped metal source, a sodium source and a cobalt source, sintering, and cooling to obtain a P2-phase precursor; s2, uniformly mixing the P2-phase precursor, a lithium source A and the coating layer precursor, sintering, and cooling to obtain an intermediate A; s3, uniformly mixing the intermediate A and a lithium source B, sintering, and cooling to obtain an intermediate B; and S4, uniformly mixing the intermediate B and a lithium source C, sintering, cooling, washing and drying to obtain the O2-phase lithium cobalt oxide positive electrode material. The O2-phase lithium cobalt oxide positive electrode material with low residual sodium, high structural stability and excellent interface coating performance is prepared through a method of combining gradient ion exchange, gradient temperature control, gradient atmosphere regulation and control and synchronous in-situ coating.

Provided are: a method for producing a proton-containing oxide, the method comprising reacting a basic oxide with a carboxylic acid melt having at least pKa4 and introducing a proton into the basic oxide to obtain a proton-containing oxide; a dense body of a proton-containing basic composite oxide; a fuel cell; a hydrogen production cell; a hydrogen sensor; or an ammonia synthesis cell; and methods for producing the same.

The invention relates to the technical field of lithium ion batteries, and discloses a multi-element co-doped garnet solid electrolyte and a preparation method and application thereof.The solid electrolyte is a compound with the following chemical formula structure: (Li < 1 + alpha > A < 1m + t >) (La < 3 + 3-uD < 2 + u >) (Zr < 4 + x > Hf < 4 + y > Y < 3 + z > Ta < 5 + v > Mr + w) (O < 2-12-oEs-o), chemical valence balance is met, alpha is smaller than or equal to 6.8, y is smaller than or equal to 0.07, y is smaller than or equal to 0.07, and y is smaller than or equal to 0.07. V + w + x + y + z = 2, and the range among v, w, x and y does not exceed 50% of the maximum value. According to the multi-element co-doped garnet solid electrolyte provided by the invention, the ionic conductivity can be remarkably improved, the activation energy can be reduced, the air stability can be greatly improved, and the applicability is wide.

The present invention relates to aliovalently substituted argyrodite-type solid electrolyte solid electrolytes. These solid electrolytes display and increased ionic conductivity.

A solid electrolyte contains Li, Mα, Mβ, Mγ, Cl, and O. Mα is at least one element selected from the group consisting of Zr and Hf, Mβ is at least one element selected from the group consisting of Ta and Nb, and Mγ is at least one element selected from the group consisting of Gd, Yb, Dy, Er, Ho, Eu, and Sc.

To provide a novel Ta chloride-based electrolyte useful for sodium-ion batteries. [Solution] formula: NaTaCl6·xNaCl [In the equation, x is between 1 and 15 (inclusive).] An electrolyte represented by [a specific symbol / method].

To provide a nano-sized tantalum oxide particle with high specific surface area and excellent crystallinity, and a manufacturing method thereof.SOLUTION: A crystalline tantalum oxide particle has an average particle diameter (Dm) of 10 to 100 nm and a crystallite diameter (CS) of 10 to 100 nm.SELECTED DRAWING: Figure 2

The application relates to a high-heat-resistance red light-emitting material and a preparation method and application thereof, and the chemical general formula of the material is CaLaTiTaO7: x Eu 3+ , and 0 < x <= 0.8; the material is synthesized by a high-temperature solid-phase method, CaCO3, La2O3, TiO2, Ta2O5 and Eu2O3 are weighed according to the stoichiometric ratio, are ground and are calcined, the sintered product is cooled and is finely ground to obtain the material; the CaLaTiTaO7 material is first selected as a matrix to synthesize a CaLaTiTaO7: x Eu 3+ series red fluorescent powder, under 393 nm near-ultraviolet light excitation, the material presents characteristic red light emission of Eu 3+ ions at 613 nm. The CLTT:0.6Eu 3+ / PDMS flexible composite thin film constructed by the material can maintain structural integrity and light emission stability in an acid-base environment, and an LED device prepared by using the material has good white light emission characteristics.

The application discloses a kind of high stability two-dimensional nanometer material aerogel and preparation method thereof, it is related to material science and nanotechnology field.The water solution of two-dimensional nanometer material is frozen and handled to obtain frozen tissue, then foam structure is obtained by freeze drying, after which foam structure is soaked in ionic solution, freeze-dried, to obtain two-dimensional nanometer material aerogel.The application constructs two-dimensional nanometer material foam structure and introduces ionic bond crosslinking mechanism, so that two-dimensional nanometer material is combined by ionic bond to form high stability aerogel, so that aerogel has excellent performance.The application breaks through the selection limit of traditional aerogel material, and is suitable for ceramic two-dimensional material and MXenes with insufficient surface functional groups, lays a foundation for two-dimensional material aerogel large-scale production and application in the field of energy, aerospace and the like.

Disclosed herein is a battery for generating hydrogen. The battery comprises a working electrode; a reference electrode; a counter electrode; the electrolyte is sulfuric acid with the concentration of about 0.5 M; wherein the working electrode is prepared by coating a layer of ink on a glassy carbon electrode and air-drying the glassy carbon electrode; and the ink is prepared by mixing the TMD composite material decorated by platinum nanoparticles with a solution to form a mixture and carrying out ultrasonic treatment on the mixture, and the solution is composed of water, ethanol and 5% sulfonated tetrafluoroethylidene fluorinated polymer-copolymer dispersion according to a volume ratio of 4: 1: 0.1.

The present invention provides a tantalic acid compound dispersion containing tantalum. The tantalic acid compound dispersion contains an organic acid and one or more elements X selected from the group consisting of alkali metal elements and / or alkaline earth metal elements. The tantalic acid compound dispersion has a D50 (on a volume integration basis) of 100 nm or less as measured by a dynamic light scattering.

The application discloses a Bi4Ti3O12 nanosheet piezoelectric catalyst and a preparation method and application thereof. Bi(NO3)3*5H2O, Ti(OC4H9)4 and Ta2O5 are used as raw materials to prepare a precursor through co-precipitation, NaCl and KCl are used as molten salts to mix the precursor, and then ball milling is carried out, the obtained powder after the ball milling is dried, and then a molten salt reaction is carried out, so that the product is obtained, and after washing and drying, the Bi4Ti3O12 nanosheet piezoelectric catalyst is obtained, and is successfully applied to piezoelectric catalytic degradation of rhodamine B. The prepared Bi4Ti3O12 nanosheet piezoelectric catalyst is a nanosheet with high purity and good crystallinity, and a high-activity exposed surface is beneficial to improving the transmission and separation of photo-generated charges, improving the piezoelectric catalytic performance of the Bi4Ti3O12 nanosheet piezoelectric catalyst, and the preparation process is simple.

This invention relates to a method for preparing nano metal oxides and its use. The preparation method involves reacting a low-purity initial alloy containing the target metal element M and Al / Zn with a heated concentrated alkaline solution. Under specific reaction conditions, the initial alloy undergoes intense hydrogen evolution and Al / Zn-removal reaction, resulting in nanoscale fragmentation, followed by shape and composition reconstruction to form nano M oxides. Through further post-treatment, crystalline nano M oxides or modified nano M oxides can be obtained. This method is simple, fast, cost-effective, and suitable for large-scale production. It enables the preparation of nano metal oxides with various crystallinities, which have promising applications in fields including composite materials, catalytic materials, ceramic materials, refractory materials, advanced electronic materials, battery materials, chromogenic materials, wave-absorbing materials, wastewater degradation materials, antimicrobial materials, coatings, pigments, thermal spray materials, and sensors.

The invention provides an interface buffer material, a secondary battery and an electric device, and relates to the technical field of electrochemical energy storage materials. The interface buffer material disclosed by the invention comprises Ti < 3 > C < 2 > T < x > MXene and an inorganic ceramic layer coated on the surface of the Ti < 3 > C < 2 > T < x > MXene, the inorganic ceramic layer includes an oxysalt layer and a non-oxide layer. When the interface buffer material is applied to the solid-state battery, the cycling stability of the solid-state battery can be improved, and the interface impedance of the solid-state battery can be reduced.

A solid electrolyte contains Li, Mα, Mβ, Mγ, Cl, and F. Mα is at least one element selected from the group consisting of Zr and Hf, Mβ is at least one element selected from the group consisting of Ta and Nb, and Mγ is at least one element selected from the group consisting of Gd, Yb, Dy, Er, Ho, Eu, and Sc.

To provide an assembly composite, a sheet, a separator and an electrode in which dendritic growth of metallic Li is suppressed, and a power storage device. The assembly composite (10) which contains oxide grains (19) having a garnet-type crystal structure (22) containing Li, La, and Zr, and inorganic grains composed of a main-group element including Mg. The median diameter of the inorganic grains is 1 / 2 or less the median diameter of the oxide grains. The volume ratio of the inorganic grains to the oxide grains is 1 vol% or more and 10 vol% or less. The power storage device (11) includes the assembly composite.

The application relates to the technical field of battery materials, and discloses a lithium secondary battery positive electrode coating material as well as a preparation method and application thereof. 3+z Nb 1‑ x M x O 4‑y R y wherein M is selected from one of Fe, Ti, Mn, Mo, W, V, Ta and Cr; R is selected from one of F, Cl, Br and I; 0<=x<1, 0<=y<=4, and the values of x, y and z satisfy the charge balance of the positive electrode coating material. The application integrates the triple functions of thermodynamic interface protection, fast ion conduction and charge compensation in a single material through cation, anion or anion-cation co-doping design based on Li3NbO4 as a matrix; the positive electrode coating material can significantly reduce the solid-solid interface impedance in a full solid-state battery, improve the first circle coulomb efficiency, and greatly improve the long cycle stability of an electrode; meanwhile, the positive electrode coating material can effectively inhibit the decomposition of high-voltage electrolyte in a traditional liquid battery, and improve the cycle life of a positive electrode material.

This provides a new material that exhibits negative thermal expansion. [Solution] The negative thermal expansion material is Ti (3) 2-x M x O3(M contains at least one element selected from Mg, Al, Si, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, La, Ta, W, Bi, 0

The invention discloses a normal-temperature liquid aluminum-based oxyhalide inorganic electrolyte, and a preparation method and application thereof, and relates to the technical field of inorganic electrolytes. The general chemical formula is Li < x > Al (1-my) A < y > B < ny > Cl (3-x-3my) O < x >, xlt; 0.6, 0 < = y < lt >; 0.3, 2 < = n < = 5, 1 < = m < = 3; m is an integer, and n is an integer; a is at least one of Al, Ta, Nb, Hf, Zr, In, Zn, Y, B and Sc; and B is at least one of Cl, Br, S, I and N. The electrolyte disclosed by the invention is in a liquid state with relatively high viscosity at room temperature, has viscoelasticity and shows excellent ionic conductivity. The raw materials are simple, the cost is low, the synthesis is simple, convenient and rapid, the energy consumption is low, and the HCl gas generated by anion exchange has low boiling point and is not easy to remain in the system. After being doped with anions and cations, the liquid viscoelasticity is still kept at room temperature, and the ionic conductivity is still excellent.

The present invention provides: aggregates wherein dendrite growth of Li metal can be reduced; a sheet; a separator; an electrode; and a power storage device. Aggregates (10) each comprise oxide particles (19) that have a garnet crystal structure containing Li, La and Zr, and inorganic particles (22) that are formed of a typical element and contain Mg. The median diameter of the inorganic particles is 1 / 2 or less of the median diameter of the oxide particles, and the ratio of the inorganic particles to the oxide particles is 1 vol% to 10 vol%. A power storage device (11) comprises the aggregates.

To provide a coated oxide particle which is fine and is excellent in crystallinity, and a production method thereof.SOLUTION: A coated oxide particle comprises: a core particle; and a coating with which a surface of the core particle is coated. The core particle is composed of a crystalline metal oxide. The coating comprises a crystalline compound as a main component, the crystalline compound composed of at least one of a metal oxide, an oxynitride, and a nitride. The crystalline compound is lattice-matched to the crystalline metal oxide on an interface between the coating and the core particle.SELECTED DRAWING: Figure 7

The tantalic acid compound dispersion of the present invention is a tantalic acid compound dispersion containing tantalum in an amount of 0.1 mass% or more and less than 30 mass% in terms of Ta2O5, in which a particle diameter (D50) of a tantalic acid compound in the tantalic acid compound dispersion as determined by a dynamic light scattering method is 100 nm or smaller. Further, a method of producing the tantalic acid compound dispersion of the present invention includes: a reaction step of generating a tantalum compound aqueous solution by adding hydrogen peroxide to a tantalum fluoride aqueous solution; and a reverse neutralization step of generating a tantalum-containing precipitate by adding the tantalum compound aqueous solution to an alkaline aqueous solution.

A composition is provided of a rare earth-doped zirconium oxide having a tetragonal structure and having a formula: YaLnbTaxNbzZr1-a-b-x-zO2-δ where Ln is a rare earth element or a mixture of rare earth elements; 0 ≤ a ≤ 0.06; 0.06 ≤ b ≤ 0.12; 0 ≤ x ≤ 0.1; 0 ≤ z ≤ 0.1; 0.08 ≤ (x + z) ≤ 0.1; 0.16 ≤ (a + b + x + z) ≤ 0.22; and 0.01 ≤ δ ≤ 0.05. Methods of forming a coating with this composition, along with the coated components, are also provided.

A negative electrode active material is characterized by being represented by compositional formula of TiTa2-xMxO7, wherein 0.2≤x≤1.0 and M contains at least Nb.　

The present disclosure provides an ion conductive substance containing an alkali metal element, a metal element M that is at least one of a tetravalent metal element and a pentavalent metal element, a halogen element, a divalent metal element D, and an oxygen element, having a diffraction peak with a half width of 2.0 to 10° in a range where a 2θ angle is 5 to 20° in an X-ray diffraction chart obtained by measurement using CuKα rays at 25°C, and having a content of the divalent metal element D of 2.5 to 18 mol%.

A lithium-containing oxide having a cubic garnet structure and wherein, when a solid-state 19F-NMR spectrum is measured under conditions where a 19F nucleus resonance frequency is 564 MHz, at least one peak is observed within a chemical shift range of −100 to 50 ppm, based on a chemical shift of polytetrafluoroethylene being −122 ppm.

The invention relates to the technical field of rare metal purification, and discloses an electronic-grade tantalum oxide-oriented method for deeply removing tungsten and molybdenum from a fluorine tantalic acid solution, which comprises the following steps of: adding peroxide into a fluorine tantalic acid raw material solution containing tungsten and molybdenum to carry out oxidative complexation, and then adding ammonia to adjust the pH value of the solution to obtain a precipitate; and after solid-liquid separation, drying and roasting to obtain the high-purity tantalum oxide. According to the method, deep removal of tungsten and molybdenum in the fluorine tantalic acid solution can be realized, and the obtained tantalum oxide product can meet the requirement for preparing a 5N-grade high-purity tantalum oxide product; the method provided by the invention has remarkable advantages in reagent selection, does not need to use a special reagent with high price, and can realize a target treatment effect only by consuming part of peroxy ions. By means of the design, reagent cost is greatly reduced, pollution is reduced due to the fact that use of complex chemical reagents is avoided, and meanwhile the quality of final products can be guaranteed.