11results about "Titanates" patented technology

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 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 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.

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.

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.

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.

The invention relates to a copper calcium titanate nanoflower and a preparation method thereof, and belongs to the field of high-dielectric-constant electronic ceramic materials. The size of the copper calcium titanate nanoflower is 100-500 nm, the shape of the copper calcium titanate nanoflower is petal-shaped, and the dielectric constant of the copper calcium titanate nanoflower at 100 Hz is 2 * 10 < 4 >-8 * 10 < 5 >. The preparation scheme of the copper calcium titanate nanoflower comprises the following steps: firstly synthesizing titanium dioxide nanoflower from tetrabutyl titanate and hydrochloric acid through a hydrothermal method; and then synthesizing the copper calcium titanate nanoflower by a hydrothermal method by taking the titanium dioxide nanoflower as a template, copper nitrate trihydrate and calcium nitrate tetrahydrate as raw materials and a phenolic compound as an additive. The copper calcium titanate nanoflower prepared by the method has excellent dielectric properties and petal-shaped morphology, can be widely applied to high-dielectric composite materials, and can also be applied to the field of dielectric capacitors. The preparation process of the copper calcium titanate nanoflower is simple, convenient and easy to implement, low in cost and suitable for industrial continuous and mass production, and the prepared copper calcium titanate nanoflower is excellent in performance, has petal-shaped morphology and can be used for dielectric composite materials.

The invention relates to a material of the formula SnTiO3 having a crystal structure comprising layers, wherein the layers comprise Sn(II) ions, Ti(IV) ions and corner- sharing O6-octahedra, the corner-sharing O6-octahedra form sub-layers, the Ti(IV) ions are located within 2 / 3 of the corner-sharing O6-octahedra to form corner-sharing TiO6-octahedra, the corner-sharing TiO6-octahedra form a honeycomb structure comprising hexagons within the sub-layers, the hexagons have Ti(IV)-voids within, the Sn(II) ions are located above and below the Ti(IV)-voids with respect to the sub-layers and the crystal structure satisfies at least one of the following features (i) and (ii): (i) the Sn(II) ions have a tetrahedral coordination shell, the tetrahedral coordination shell contains three O ions of the layer and an electron lone pair of the Sn(II) ion, the electron lone pair is located in a top position with respect to the three O ions of the layer, (ii) the layers are stacked in a specific manner.

Titanium oxide particles having a high solar reflectance are provided. Titanium oxide particles include titanium dioxide, and the titanium oxide particles have a value calculated as a standard deviation / an average particle size × 100 of less than or equal to 30%. A method for producing the titanium oxide particles includes a mixing step and a firing step. The mixing step is a step of mixing a titanium compound with a molybdenum compound and at least one of a potassium compound or a sodium compound to form a mixture. The firing step is a step of firing the mixture. A molar ratio of Mo to M1 of the mixture is more than 0.5, where M1 represents Na and K.

The invention discloses a preparation method of a double-layer gradient pre-sodium-modified sodium titanate negative electrode material, which comprises the following steps: taking tetrabutyl titanate as a titanium source, taking sodium acetate as a sodium source, mixing with a solvent, stirring to form sol, adding glucose, aging to form sodium titanate precursor gel, and carrying out heat treatment to obtain an inner-layer pre-sodium core; the inner-layer pre-sodium core is placed in a sodium naphthalene / dimethoxyethane solution for dipping treatment, and an outer-layer artificial SEI film is formed on the surface of the inner-layer pre-sodium core after vacuum drying; and carrying out dipping treatment in a fluoroethylene carbonate solution, and carrying out vacuum drying to form a surface stabilizing layer. Controllable storage of sodium ions is achieved through inner-layer pre-sodium, a stable SEI film is formed through outer-layer pre-sodium, directional compensation of the sodium ions and construction of the stable SEI film are achieved, surface stabilizing treatment is assisted, and the problem of low first effect is cooperatively solved; the excessive sodium pre-curing risk of a traditional method is avoided, and meanwhile the interface dynamic performance is optimized.

The application discloses a perovskite heterostructure material, a preparation method and application thereof, and a battery. (n+1) / 2 A' (n+1) / 2 B n O 3n+1 , n = 1, 2, 3; and a chemical formula of the heterostructure coating layer is A 3y A' 2 / 3‑y BO 3‑δ , 0.1 <= y <= 0.2; A is one or more of Li, Na and K, A' is a lanthanide element and / or Y, and B is Ti. The perovskite heterostructure material prepared by the method has intrinsic safe working voltage and excellent high-rate performance and cycle stability, and the preparation method is simple and efficient, and is easy to realize industrialized preparation.