24results about "Germanium compounds" patented technology

A method for producing a sulfide solid electrolyte includes: supplying a sulfide solid electrolyte raw material to a tank of a heating furnace; and heating and melting the sulfide solid electrolyte raw material in a gas atmosphere containing a sulfur element. The method includes: obtaining a melt by the heating and melting; and setting a temperature on a bottom side of the melt to be higher than a temperature on a liquid surface side of the melt in the tank.

The main objective of this disclosure is to provide a sulfide solid electrolyte with good water resistance. This disclosure addresses the aforementioned problem by providing a sulfide solid electrolyte containing Li, Ge, P, and S, and exhibiting an LGPS-type crystal phase. When X-ray photoelectron spectroscopy is performed on the surface of the aforementioned sulfide solid electrolyte, Ge... 2+ It accounts for more than 20% of the total amount of Ge.

The invention relates to an improved synthesis process of a cesium germanium bromide halogen perovskite material. The improved synthesis process comprises the following reaction steps: (1) constructing a condensation reflux device and a nitrogen pipeline; (2) weighing germanium dioxide, hydrobromic acid, concentrated hypophosphorous acid and absolute ethyl alcohol; (3) putting the three-neck flask into an oil bath pan, and connecting a condensation reflux device and a nitrogen gas path; (4) after germanium dioxide is completely dissolved, the solution in the flask is clarified; (5) injecting the cesium bromide solution into the three-neck flask in a nitrogen environment, heating, and reacting for a period of time; (6) cooling the solution to room temperature in a nitrogen environment, and collecting a yellow cesium germanium bromide crude product; and (8) refining the crude cesium germanium bromide to obtain refined cesium germanium bromide, wherein the impurity content is lower than 0.5%. According to the method, the cesium-germanium bromide solution and methylbenzene are used, so that the problem that divalent germanium ions and cesium bromide are not completely reacted is solved, and a good solution is provided for synthesizing a high-purity cesium-germanium bromide material.

The application belongs to the field of novel multi-component photoelectric conversion materials, and particularly relates to a hexagonal Cu3GeS4 quantum dot, a preparation method and application thereof. The crystal form of the Cu3GeS4 quantum dot is hexagonal, and the micro-morphology is nanoscale spherical and / or polyhedral structure. The preparation method comprises the following steps: (1) dissolving germanium dioxide in a mercaptoacetic acid and ammonia water medium for standby; (2) dissolving a copper source in a high-boiling organic solvent and heating to a first temperature for constant temperature reaction for a period of time, then rapidly heating to a second temperature, injecting the germanium solution, and separating the solid product after the reaction is completed, thereby obtaining the product. The Cu3GeS4 quantum dot has high crystallinity, high monodispersity and uniform morphology size. The synthesis method has mild reaction conditions and simple process, realizes controllable preparation of the hexagonal Cu3GeS4 quantum dot with controllable size, uniform morphology, high crystallinity and monodispersity, and the nanomaterial can be potentially applied to the field of photoelectric conversion.

Provided is a process for preparing composite particles for use as an electroactive material for a metal-ion battery, the process comprising the steps of: (a) providing porous particle frameworks comprising micropores and / or mesopores and optionally a polyvalent metal; (b) optionally impregnating the porous particle frameworks with a polyvalent metal; (c) depositing elemental silicon and / or elemental germanium in the pores of the porous particle frameworks; wherein either the porous particle frameworks in step (a) comprise the polyvalent metal, step (b) is performed, or both; thereby providing impregnated porous particle frameworks comprising the polyvalent metal and the silicon and / or germanium; and (d) contacting the impregnated porous particle frameworks with a monovalent metal while applying an electric potential effective to cause the formation of an intermetallic phase which comprises the polyvalent metal, silicon and / or germanium, and the monovalent metal; thereby providing the composite particles.

What is provided are a proton-conducting solid electrolyte which can exhibit high proton conductivity and stability in a low-temperature range and a medium-temperature range, an electrolyte layer formed of the proton-conducting solid electrolyte, and a battery. As an example, a proton-conducting solid electrolyte represented by a general formula: Ba1-αSc1-xMoxO3-δHy, in which α is −0.2 to 0.2, x is 0.1 to 0.3, y is 0 to 1-3x, and δ is 0 to ½-3x / 2, a proton-conducting solid electrolyte represented by a general formula: BaSc1-xMoxO3-δHy, in which x is 0.15 to 0.25, y is 0 to 1-3x, and δ is 0 to ½-3x / 2, or the like; an electrolyte layer, and a battery are provided.

The application relates to the technical field of lithium ion batteries, and discloses a germanium-doped lithium-rich manganese-based positive electrode material, a preparation method thereof and a battery, steps of which are as follows: a Ni 0.25 Mn 0.75 CO3 precursor is prepared by adopting a carbonated co-precipitation method of a continuous stirring reaction kettle; the above Ni 0.25 Mn 0.75 CO3 precursor is fully ground and uniformly mixed with Li in a lithium source and a germanium source according to a certain proportion; the mixture is placed in a high-temperature calcining furnace to perform calcining under an air atmosphere, and a germanium-doped lithium-rich manganese-based positive electrode material modified by germanium ions is prepared after annealing; the germanium-doped lithium-rich positive electrode material is realized by adopting a one-step sintering method, and nanometer-scale fast-ion conductor lithium germanate coating is realized; germanium ions are introduced in a crystal lattice to induce Ni 2+ oxidation, cation order of the material is improved, the nanometer-scale fast-ion conductor lithium germanate coating can effectively isolate interface side reactions of the electrode material, lithium ion transmission is accelerated, the structural stability of the battery material is improved, and the cycle performance of the battery is improved.

The present invention relates to a method for producing a sulfide-based solid electrolyte powder, in which: a sulfide-based solid electrolyte raw material is heated and melted in a furnace; and while the obtained melt is discharged from the furnace, the melt is sprayed with a gas to cause the melt to cool, solidify, and undergo powderization.

The invention discloses near ultraviolet light excitable white light fluorescent powder with a high color rendering index and a preparation method of the near ultraviolet light excitable white light fluorescent powder. The invention relates to near ultraviolet light excitable white light fluorescent powder with a high color rendering index, the chemical composition expression formula of the fluorescent powder is Y < 2.94-x > Tb < x > Sm < 0.06 > MgGa2AlGeO12, x is the doping content of Tb, and x is more than or equal to 0.075 and less than or equal to 0.105. The white light fluorescent powder provided by the invention not only has characteristic green light of terbium ions and characteristic red light of samarium ions, but also has additional wide-band blue light which does not belong to rare earth ions as a matrix, so that high-color-rendering-index white light with Ra and R9 both greater than 90 is obtained. The synthesis reaction process of the white light fluorescent powder provided by the invention only needs one-step sintering in a common air atmosphere, the reaction temperature is low, the reaction time is short, and the production is simple, convenient and rapid.

The invention discloses ultra-wide-spectrum garnet-based near-infrared fluorescent powder and a preparation method thereof. The chemical composition expression formula of the ultra-wide-spectrum garnet-based near-infrared light fluorescent powder is Y3Mg < 1-x > CrxGa < 2 + x > AlGe < 1-x > O12, and x is more than or equal to 0.01 and less than or equal to 0.05. The near-infrared light Y < 3 > Mg < 1-x > Cr < x > Ga < 2 + x > Al < Ge < 1-x > O < 12 > fluorescent powder provided by the invention can be excited by ultraviolet light with the wavelength of 260-300 nm, blue light with the wavelength of 400-500 nm and red light with the wavelength of 575-675 nm, and can emit ultra-wide-band near-infrared light with the main peak at 765 nm and the half-peak width not less than 150 nm.

The invention discloses yttrium-magnesium-gallium-aluminum-germanium garnet-based red-light fluorescent powder and a preparation method thereof. The chemical composition expression formula of the yttrium magnesium gallium aluminum germanium garnet-based red light fluorescent powder is Y (3-x) MgGa2AlGeO12: xEu < 3 + >, and x is more than or equal to 0.01 and less than or equal to 0.667. The yttrium magnesium gallium aluminum germanium garnet-based red light fluorescent powder provided by the invention can be excited by 225-300nm ultraviolet light and 375-400nm near ultraviolet light, multimodal narrow-band fluorescence emission covering a 585-600nm orange red light region, a 605-630nm positive red light region and a 690-715nm deep red light region is obtained, and the chromaticity coordinate is positioned at (0.6326, 0.3669). Due to the fact that balanced fluorescence emission of a plurality of narrow-band peaks can be achieved in a 585-600 nm orange red light area, a 605-630 nm positive red light area and a 690-715 nm dark red light area, the fluorescent powder is suitable for being applied to optical light source devices such as healthy lighting, plant lighting and temperature detection.

The purpose of the present invention is to provide: needle coke for graphite electrodes for which a huge cost is not required at the time of manufacturing, in which puffing of the needle coke is suppressed, and which improves manufacturing yield and properties of graphite electrodes; a manufacturing method thereof; and an inhibitor. This inhibitor for graphite electrode production is volatile at a temperature of 2100-6000°C and comprises: a metal comprising at least one element (Mβ) selected from the group consisting of Group 4 elements, Group 8 elements, Group 9 elements, Group 10 elements, Group 13 elements, Group 14 elements, and Group 15 elements of the long form of periodic table, and / or one oxide including the element (Mβ); or a metal comprising the element (Mβ) and / or a compound including the element (Mβ).

This invention relates to a novel crystalline solid electrolyte for lithium secondary batteries and a method for producing the same. [Solution] A solid electrolyte for lithium secondary batteries containing lithium (Li), germanium (Ge), and sulfur (S), having a monoclinic crystal structure, wherein the solid electrolyte has excellent lithium ion conductivity and is chemically stable.

The object of the present invention is to provide a needle coke for a graphite electrode, which suppresses puffing of the needle coke and improves the production yield and performances of graphite electrodes without incurring a large cost in the production of a needle coke, and also provide a production method and an inhibitor therefor. An inhibitor for graphite electrode production, including at least one of a metal consisting of an element (Mβ) and an oxide comprising the element (Mβ), wherein the element (Mβ) is at least one element selected from the group consisting of group 4 elements, group 8 elements, group 9 elements, group 10 elements, group 13 elements, group 14 elements and group 15 elements of the long-form periodic table, or including at least one of the metal consisting of an element (Mβ) and a compound including the element (Mβ), wherein the inhibitor volatilizes at a temperature of 2100 to 6000 °C.

The invention relates to a method for producing isotope-enriched germanium-hydrogen compounds, comprising the following method steps: a) providing a gas of a highly chemically pure germanium tetrafluoride; and b) providing a reducing solution in an inert reaction container, the reducing solution containing an organic solvent and an alkali-aluminum hydride as the reducing agent; c) introducing the gas in the reducing solution; and d) condensing the gaseous germanium-hydrogen compounds produced by the reduction.

The solid electrolyte contains M1, M2, and X, M1 is an element having a monovalent cation and including at least one element selected from the group consisting of Li, Na, and K, M2 is at least one element having a trivalent cation, X is at least one element selected from the group consisting of F, Cl, Br, and I, and the axial angles alpha, beta, and gamma in the unit lattice of the crystal structure are all 90 DEG. As a result, it is possible to provide a solid electrolyte having high ion conductivity.

This method for manufacturing a sulfide solid electrolyte material is characterized by including a starting material mixing step S01 for mixing starting materials, which respectively contain elements that constitute the sulfide solid electrolyte material, so as to obtain a mixed starting material and a generation step S02 for heating the mixed starting material so as to generate the sulfide solid electrolyte material, wherein, in the generation step S02, the heating atmosphere contains a sulfur gas with a controlled partial pressure.

A solid electrolyte for a lithium secondary battery having a novel crystal structure and a method for producing the same is provided. The solid electrolyte has excellent lithium-ion conductivity and is chemically stable. The solid electrolyte comprises lithium (Li), germanium (Ge), and sulfur (S), forming a ternary compound with Ge2S7 polyhedra and GeS4 tetrahedra in a unit cell. The electrolyte may include compounds such as Li16Ge5S18 and demonstrates lithium-ion conductivity of at least 8.7×10−6 S·cm−1 at 25° C. Production methods involve either milling lithium and germanium sulfides to form an amorphous intermediate material, followed by heat treatment, or using crystalline raw materials like Li2GeS3 and Li4GeS4 directly. Both methods produce a stable, high-conductivity solid electrolyte suitable for all-solid-state lithium batteries, addressing safety and performance limitations of conventional electrolytes.

The invention belongs to the technical field of electro-catalytic materials, and particularly relates to a transition metal-based heterojunction nano array electrode material and a preparation method and application thereof. The transition metal-based heterojunction nano array electrode material provided by the invention is prepared by three steps: firstly, placing a current collector in a mixed solution of transition metal salt and an organic ligand for reaction to obtain a metal-organic ligand precursor array material; then, the precursor array material is placed in a solution containing oxometallate to be treated; and finally, carrying out high-temperature gas-solid reaction with a selenium / tellurium source. The material can be used as an electro-catalytic material, shows excellent catalytic activity and stability in sulfide oxidation reaction (SOR), and provides an efficient and green solution for sulfur-containing wastewater treatment.

This invention provides a method for producing a high-quality sulfide solid electrolyte material with sufficient ionic conductivity by suppressing the evaporation of sulfur during heat treatment without using hydrogen sulfide gas. [Solution] A method for producing a sulfide solid electrolyte material, comprising: a raw material mixing step S01 of mixing raw materials containing each element constituting the sulfide solid electrolyte material to obtain a mixed raw material; and a production step S02 of heating the mixed raw material to produce the sulfide solid electrolyte material, wherein the production step S02 is characterized in that the heating atmosphere contains sulfur gas with controlled partial pressure.

Perovskites have high density of vacancies which absorb oxygen molecules and upon illumination, transform them into superoxide species which react with perovskites to decompose them, preventing use of these materials in many photo-applications. The present disclosure provides ways for improving the stability of perovskites in air ambient by doping perovskites with metals such as lead, cadmium, zinc, manganese, iron, cobalt, nickel, copper and tin which decreases the density of vacancies in perovskites and significantly increases the lifetime of perovskites. Perovskite solar cells containing inorganic and organic ions such as Cs+, formamidinium and methylammonium cations, Pb2+, Br- and I- with these metal dopants exhibit stable efficiency within a month of storage in air ambient with the relative humidity of 50%.

There is provided a process for preparing composite particles for use as electroactive materials for metal ion batteries, the process comprising the steps of: (a) providing a porous particle skeleton comprising micropores and / or mesopores and optionally a multivalent metal; (b) optionally impregnating the porous particulate backbone with a multivalent metal; (c) depositing elemental silicon and / or elemental germanium in pores of the porous particle skeleton; wherein the porous particle skeleton in step (a) comprises the multivalent metal, or step (b) is performed, or both; thereby providing an impregnated porous particle skeleton comprising the polyvalent metal and the silicon and / or germanium; and (d) contacting the impregnated porous particle backbone with a monovalent metal while applying an electrical potential effective to cause the formation of an intermetallic phase comprising the polyvalent metal, silicon and / or germanium and the monovalent metal; the composite particles are thus provided.