211 results about "Lithium oxide" patented technology

The present invention discloses a tellurium-lead-lithium oxide glass powder for BC cell N-region conductive paste and its preparation method, belonging to the field of photovoltaic silver paste. The glass powder adopts components with high Pb, Te, and Li: aTeO2 - bPbO - cLi2O - dBi2O3 - eWO3 - fZnO - gSiO2 - hNa2O; where a + b + c + d + e + f + g + h = 1, 0.2 < a < 0.4, 0.1 < b < 0.4, 0.1 < c < 0.25, 0 < d < 0.1, 0 < e < 0.1, 0 < f < 0.1, 0 < g < 0.1, 0 < h < 0.05, and a + b > 0.5, and the ratio of c to h is (3 - 10):1. By controlling the specific Pb, Te, and Li contents and the specific Li / Na ratio in the present invention, a strong corrosion effect on the poly layer of the cell is achieved, enabling more silver ions dissolved in the glass liquid to recrystallize on the surface of the silicon wafer, thereby achieving good ohmic contact.

The present invention relates to a method for preparing lithium sulfide, according to the present invention, when preparing lithium sulfide by a reaction between a lithium raw material and hydrogen sulfide, the reaction is carried out under relatively mild conditions compared to the prior art, so that frequent maintenance or replacement due to corrosion and failure of a reactor and various pipes is not required, thereby improving the economical efficiency of the process. Further, by reusing the unreacted hydrogen sulfide from which moisture has been removed and the solvent, process costs can be reduced, and economical efficiency can be ensured during mass production. Furthermore, moisture and water vapor generated in the lithium sulfide generation reaction are effectively removed, thereby preventing a reverse reaction for generating lithium hydroxide, promoting a positive reaction, and producing high-quality lithium sulfide with high purity and high yield. In addition, the particle size can be adjusted in units, and a separate pulverizing space or pulverizing table is not required, so that convenience and mass productivity are excellent.

Lithium oxide argyrodites having the formula Li(6−y)PS4O(1−y)X(1+y) where X is a halide anion and y is a number between 0 and 0.8, inclusive, are provided herein. Also provided are methods of synthesizing the lithium oxide argyrodites and composites including the lithium oxide argyrodites, as well as other alkali metal oxide argyrodites and related methods and composites.

The invention relates to the technical field of glass ceramics, in particular to a silicon dioxide-containing glass ceramic wafer substrate and a preparation method thereof. The preparation method comprises the following steps: weighing aluminum oxide, hydroxyethyl urea, chromium dioxide, lithium oxide, magnesium oxide, titanium dioxide, a clarifying agent, a toughening agent and silicon dioxide; preparing an aqueous solution from hydroxyethyl urea, and putting the powder, a clarifying agent, a toughening agent and the aqueous solution into a ball milling tank to obtain slurry; carrying out vacuum defoaming, tape casting, drying, glue removal heat treatment, glass melting, rolling and annealing treatment to obtain a glass plate; and polishing, ultrasonically cleaning and drying the glass plate to obtain the wafer substrate. According to the preparation method, hydroxyethyl urea and chromium dioxide are combined under a specific controlled heat treatment system, so that the functions of a conventional dispersing agent are exceeded, a unique toughening phase existing in a grain boundary is generated through in-situ reaction, uniform formation of a superfine nanocrystalline structure is realized synergistically, and thus the fracture toughness and the surface flatness of the material are synchronously and remarkably improved.

The invention relates to the technical field of batteries, in particular to a high-entropy amorphous oxide material and a preparation method thereof, an electrolyte material and a battery. The preparation method provided by the invention comprises the following steps: providing lithium oxide, rare earth oxide and zirconium oxide, and mixing the lithium oxide, the rare earth oxide and the zirconium oxide according to a preset first molar ratio to obtain an oxide matrix; providing a transition metal oxide and a glass network forming body, and mixing the matrix, the transition metal oxide and the glass network forming body according to a preset second molar ratio to obtain a precursor; treating the precursor by adopting a sol-gel method or a ball milling method, and then heating and cooling to obtain an amorphous compact structure; and providing a substrate, taking the amorphous compact structure as a target material, depositing the target material on the substrate by adopting a magnetron sputtering method, and stripping the substrate to obtain the high-entropy amorphous oxide material. The invention seeks an amorphous oxide material which is stable in structure and has higher ionic conductivity compared with an inorganic solid electrolyte.

The invention provides a preparation method of lithium hydroxide, and relates to the technical field of salt lake lithium extraction. The preparation method of the lithium hydroxide comprises the following steps: S1, uniformly mixing a nanofiltration concentrated solution with a lithium precipitation mother solution, carrying out heating reaction, and filtering to obtain a mixed solution A; s2, the mixed solution A is subjected to impurity removal through a resin column, and a mixed solution B is obtained; s3, concentrating and crystallizing the mixed solution B to obtain a mixed solution C; s4, adding an acid solution into the mixed solution C to adjust the pH value, and then performing electrodialysis to obtain a mixed solution D; s5, the mixed solution D is subjected to boron removal through a resin column, and a purified solution is obtained; s6, the purified liquid is subjected to bipolar membrane electrodialysis, and a lithium hydroxide solution and an acid solution are obtained; and S7, evaporating, concentrating, crystallizing and centrifuging the lithium hydroxide solution to obtain lithium hydroxide. According to the method, the nanofiltration concentrated liquor and the lithium precipitation mother liquor are used for treating wastes with wastes, so that efficient recovery of lithium and green preparation of lithium hydroxide are realized.

This method comprises: mixing a first solution containing a metal nitrate with a second solution containing lithium hydroxide to precipitate a metal hydroxide; thermally decomposing lithium nitrate produced from the metal nitrate and the lithium hydroxide; and recovering lithium oxide contained in the thermal decomposition product of the lithium nitrate. This method may further comprise converting lithium oxide into lithium hydroxide and reusing the lithium hydroxide.

The invention provides a preparation method for synthesizing lithium sulfide from industrial-grade lithium hydroxide and sodium sulfide, a preparation method for a solid electrolyte and a solid-state battery, and the preparation method for synthesizing lithium sulfide from industrial-grade lithium hydroxide and sodium sulfide comprises the following steps: dissolving an industrial-grade lithium hydroxide raw material, and sequentially carrying out oxidation, filtration, washing and drying to obtain lithium sulfide; sodium sulfide and a flocculating agent are added for precipitation and filtration, then sodium carbonate and barium nitrate are sequentially added for impurity removal and filtration, and a lithium hydroxide purified solution is obtained; reacting the sodium sulfide solid with dilute sulphuric acid to obtain hydrogen sulfide gas; hydrogen sulfide gas is introduced into the lithium hydroxide purification liquid for a reaction, and lithium sulfide slurry is obtained; evaporating, concentrating and crystallizing the lithium sulfide slurry, and centrifugally separating; and carrying out vacuum calcination on the crystal, and crushing to obtain lithium sulfide powder. Through oxidative conversion, chemical precipitation and crystallization purification, efficient and deep removal of impurities is realized, the problems that raw material components are complex and difficult to separate are solved, and the purity of lithium sulfide is improved.

The invention relates to the technical field of battery preparation, and provides a lithium oxide gradient doped lithium-phosphorus-sulfur-chlorine-oxygen solid electrolyte and a preparation method thereof.The lithium oxide gradient doped lithium-phosphorus-sulfur-chlorine-oxygen solid electrolyte comprises the main components that a lithium oxide concentration gradient exists in the thickness direction of the electrolyte, the molar content of surface layer lithium oxide is 5%-15%, and the molar content of surface layer lithium oxide is 5%-15%; the molar content of lithium oxide in the central layer is 0.5%-3%; wherein 0.05 < = x < = 0.8, and 0.01 < = y < = 0.3. According to the lithium oxide gradient doped lithium-phosphorus-sulfur-chlorine-oxygen solid electrolyte, the lithium oxide concentration gradient is set along the thickness direction of the electrolyte, so that the stress concentration caused by sudden concentration change can be avoided, and the interface layering risk and the longitudinal penetration of lithium dendrites can be inhibited.

The invention relates to the technical field of lithium compound production, in particular to a continuous production device for preparing lithium carbonate through lithium hydroxide carbonization reaction and a working method thereof.The continuous production device comprises a lithium hydroxide slurry blending tank, a main reactor, an aging tank, a centrifugal machine and a drying device which are sequentially connected through pipelines and pumps; the drying device at least comprises a pre-carbonization tower and a deep carbonization tower, and the drying device comprises a pre-pre-drying mechanism, a main drying mechanism and a final drying mechanism; the drying efficiency is high, the adaptability is high, the three-stage sectional design is adopted, optimization treatment is carried out according to different characteristics of materials under different water contents, especially air arrow impact and fall crushing in the pre-drying stage, high-humidity and easily-caked initial materials can be efficiently treated, and the problems that traditional equipment is prone to material blockage and uneven in drying are solved.

The application discloses a recycling method of valuable metals in lithium ion batteries, and relates to the technical field of battery recycling. The application adopts waste rubber particles as fuel and reducing agent, mixes the waste rubber particles with lithium ion battery electrode powder to granulate, and then carries out one-time and two-time roasting pyrolysis, so that the gas generated by the waste rubber particles has high calorific value and strong reducibility, the ternary lithium battery electrode powder can be reduced into soluble lithium oxide, and the lithium metal can be recycled through water immersion, the metal recovery rate is high, the energy consumption is low, the resource recycling rate can be improved by using the waste rubber particles, and the method is economical and environment-friendly.

The invention discloses a space anti-radiation glass cover sheet and a preparation method thereof, the glass cover sheet comprises the following raw materials by mass: 50-70 parts of silica, 5-15 parts of sodium oxide, 5-10 parts of lithium oxide, 5-10 parts of diboron trioxide, 3-10 parts of lead oxide, 2-6 parts of cerium oxide, 0.5-6 parts of potassium oxide, and 2-5 parts of alumina. According to the invention, PbO and CeO2 are added into the preparation raw materials, so that the radiation resistance of the glass cover plate is enhanced.

This invention relates to the field of battery manufacturing technology, and provides an interface buffer layer for lithium phosphorus-sulfur-chlorine-oxygen solid electrolyte and lithium anode, and its in-situ construction method. The interface buffer layer is composed of lithium oxide and lithium sulfide in a molar ratio of 1:0.2-1:2. The method involves spraying a mixed powder of lithium oxide and lithium sulfide onto the surface of the lithium anode, and applying voltage during the first charge of the battery to trigger an in-situ reaction, generating a continuous interface layer containing lithium phosphate and a crystalline phase. The in-situ construction method of the interface buffer layer includes the following steps: S1, ball milling and then blending the lithium oxide and lithium sulfide raw materials; S2, cold spraying and deposition of the mixed powder; S3, voltage-programmed activation treatment using a segmented constant voltage method; and S4, interface relaxation treatment. This invention's interface buffer layer, through electrochemical in-situ construction of a high-modulus buffer layer, solves the problems of severe chemical side reactions and the risk of lithium dendrite penetration present in existing LPSClO electrolytes.

This application provides a lithium-rich lithium iron ferrite (LFO) material, its preparation method, a positive electrode sheet, and a secondary battery, belonging to the field of secondary battery technology. The preparation method includes: mixing a lithium source and an iron source to obtain a mixture; subjecting the mixture to preheating sintering, a first sintering, a first pulverization process, a second sintering, and a second pulverization process sequentially to obtain a sintered material; dispersing a carbon source and a phosphorus source in an organic solvent to obtain a coating solution; dispersing the sintered material in the coating solution and drying to obtain an intermediate product; sintering the intermediate product and pulverizing it to obtain the lithium-rich lithium iron ferrite material; wherein the lithium source is lithium hydroxide or a mixture of lithium hydroxide and lithium oxide; the temperature of the first sintering is controlled within the range of 410~550℃, and the temperature of the second sintering is controlled within the range of 600~780℃. This application aims to solve the technical problem of high production cost in existing LFO synthesis methods.

The invention relates to the technical field of mineral flotation, and discloses a method for compounding a lithium oxide collecting agent in a low-temperature environment, and the lithium collecting agent comprises the following compounding raw materials in percentage by mass: 15-25% of palmitic acid soap; 10%-20% of sulfonated petroleum; 5% to 10% of iso-tridecanol polyoxyethylene ether; 8%-15% of fatty alcohol-polyoxyethylene ether; 3%-8% of polyoxyethylene ether sodium sulfonate; 5%-10% of dipropylene glycol monomethyl ether; 8%-15% of sodium carbonate; 2%-5% of sodium hydroxide; 0.5%-2.0% of sodium fluoride; 0.5%-2.0% of aluminum sulfate; 1%-4% of tannic acid; a synergistic surfactant system is formed by constructing palmitic soap and sulfonated petroleum as a main collecting frame and compounding isomeric alcohol ether, fatty alcohol-polyoxyethylene ether and polyoxyethylene ether sodium sulfonate, dipropylene glycol monomethyl ether is introduced as a low-temperature mutual solvent, and the low-temperature mutual solvent is used for collecting the high-temperature-resistant oil-displacing agent for the oil-displacing oil-displacing agent for the oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil. The freezing point and viscosity of a collecting agent system are greatly reduced, the liquidity, uniformity and dispersion stability of the collecting agent are still kept when the collecting agent is used in the low-temperature environment of 0-15 DEG C, and the failure problem caused by low-temperature solidification or layering is fundamentally avoided.

The invention provides a preparation method of lithium sulfide, which comprises the following steps: 1) smelting a mixture of lithium iron phosphate, a carbon material and aluminum oxide, and then carrying out first separation treatment to obtain a lithium oxide-aluminum oxide molten phase; (2) introducing sulfur vapor into the lithium oxide-aluminum oxide molten phase to carry out vulcanization reaction, and then carrying out second separation treatment to obtain a lithium sulfide-aluminum sulfide eutectic melt; and 3) carrying out crystallization treatment on the lithium sulfide-aluminum sulfide co-melt, and then carrying out third separation treatment to obtain the lithium sulfide.The preparation method is simple in process and low in energy consumption, so that the production cost of the lithium sulfide is effectively reduced, and large-scale production of solid-state batteries is promoted.

The invention belongs to the technical field of batteries, and particularly relates to a positive electrode material and a preparation method thereof, a positive plate, a lithium ion battery and an electric device. The positive electrode material comprises a multi-element material core and a coating layer coating the surface of the multi-element material core, wherein the coating layer comprises an oxide of an element A and / or a lithium-oxygen compound of the element A and LiF; the positive electrode material meets the condition that a / a is greater than or equal to 0.02% and less than or equal to 0.35%; 0.14% < = c / c < = 0.76%. The lithium carbonate content of the positive electrode material is low, and the positive electrode material is applied to a lithium ion battery, so that the lithium ion battery has relatively high capacity, relatively high rate capability and relatively long cycle life.

This application discloses a method for producing acetonitrile by amination of acetate, comprising the following steps: in a reactor, acetate, ammonia, and a catalyst are contacted and reacted to obtain acetonitrile; wherein the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; the catalyst is composed of a support and alkaline earth metal oxides and alkali metal oxides supported on the surface of the support; wherein the support is selected from at least one of silicon oxide, aluminum oxide, titanium oxide, and zirconium oxide; wherein the alkaline earth metal oxide is selected from at least one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide; wherein the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide; wherein the loading of alkaline earth metal oxide in the catalyst is 0.01–10 wt%, the loading of alkali metal oxide is 0.05–5 wt%, and the remainder is the support.

The preparation method comprises the following steps: mixing a lithium source material, water, a first solvent and quaternary amine alkali, reacting the quaternary amine alkali with carbon dioxide in a reaction atmosphere containing carbon dioxide to generate HCO3 <->, reacting the HCO3 <-> with lithium ions in the lithium source material to generate lithium bicarbonate, and collecting a water phase after the reaction; decomposing lithium bicarbonate in the water phase to generate lithium carbonate, collecting a solid phase, and decomposing lithium carbonate in the solid phase to generate lithium oxide to obtain an intermediate; dissolving quaternary ammonium iodide in a second solvent, adding the intermediate, converting the lithium oxide into lithium hydroxide, carrying out ion exchange on the lithium hydroxide and the quaternary ammonium iodide to generate lithium iodide, and collecting a liquid phase; and collecting the lithium iodide in the liquid phase. According to the present invention, based on the characteristics of the specific quaternary ammonium base and the quaternary ammonium iodide salt, the Li in the lithium source material is selectively reinforced, carbonized and leached, the anion impurities in the lithium source material are removed, the anion exchange in the organic phase is achieved, and the high-purity anhydrous lithium iodide is prepared.

A method for recovering lithium from waste according to the present invention comprises the steps of: preparing lithium carbonate; converting the lithium carbonate into slurry containing lithium hydroxide and calcium carbonate by using calcium hydroxide; performing solid-liquid separation of the slurry; first purifying the solid-liquid separated lithium hydroxide aqueous solution to obtain solid waste and a purified lithium hydroxide aqueous solution; second purifying the purified lithium hydroxide aqueous solution through an ion exchange resin; crystallizing the lithium hydroxide aqueous solution subjected to the second purification to obtain lithium hydroxide, wherein the second purification step utilizes an acid regeneration method to regenerate the ion exchange resin, thereby generating acid-regeneration wastewater and a lithium hydroxide purge solution is generated in the step of crystallizing the lithium hydroxide aqueous solution; carbonating the lithium hydroxide purge solution to obtain lithium carbonate and lithium carbonate purge wastewater; preparing a wastewater mixture by mixing the acid-regeneration wastewater, the lithium carbonate purge wastewater, and the solid waste; neutralizing the wastewater mixture; introducing a lithium adsorbent into the neutralized wastewater mixture to selectively adsorb lithium; desorbing the adsorbed lithium to obtain a desorption solution; carbonating the desorption solution to obtain lithium carbonate and a carbonated filtrate; and recycling the carbonated filtrate to the step of neutralizing the wastewater mixture.

The invention discloses a method for manufacturing positive electrode particles coated with ceramic particles and a glass phase continuous layer by applying a dry-type one-time sintering process, which comprises the following steps of: mixing a nickel-cobalt-manganese precursor, a lithium source, a glass phase precursor and an LLZO (lithium lanthanum zirconium oxide) precursor in a mixing machine to form a precursor mixture; placing the precursor mixture in a sintering furnace for aerobic sintering to obtain sintered powder formed by a plurality of positive electrode particles; wherein the lithium source is firstly melted and decomposed into lithium oxide in the aerobic sintering process, and the lithium oxide reacts with the nickel cobalt manganese precursor and the LLZO precursor to generate a plurality of NCM (nickel cobalt lithium manganate) particles and a plurality of LLZO particles; the glass phase precursor is melted to form a layer of glass phase to coat the outer surface of each NCM particle, and the LLZO particles are distributed in the glass phase layer or on the outer surface of the glass phase layer to integrally form a plurality of positive electrode particles.

The invention relates to the technical field of borosilicate glass, in particular to high borosilicate glass for a fish tank and a preparation method thereof.The high borosilicate glass is prepared from, by weight, 70-75 parts of high-purity quartz sand, 13-15 parts of borax, 2-3 parts of doping materials, 1.5-2 parts of aluminum oxide, 0.3-1 part of sodium oxide and 0.2-0.5 part of potassium oxide; the water pressure resistance and thermal shock resistance of the high borosilicate glass are improved by adding a doping material which is formed by coating a silicon dioxide layer on the surface of boron nitride and is doped with aluminum oxide, lithium oxide and yttrium oxide into a raw material of the high borosilicate glass, and a potassium nitrate and sodium nitrate mixed molten salt system is used for carrying out ion exchange chemical strengthening, so that the water pressure resistance and thermal shock resistance of the high borosilicate glass are improved. Therefore, the long-term water erosion resistance is met, and meanwhile, the light transmittance can still be kept good.

The invention relates to the technical field of aluminum oxide corundum brick production, in particular to an aluminum oxide corundum brick for an ultrahigh-temperature tunnel kiln crown and a preparation method of the aluminum oxide corundum brick. The alumina corundum brick for the superhigh-temperature tunnel kiln crown comprises the following chemical components in percentage by mass: 97.5-98.2% of Al2O3; 0.1% to 0.3% of Nb2O5; 0.2 to 0.42 percent of K2O; 0.3%-0.7% of Li2O (lithium oxide); and the balance of unavoidable impurities. According to the alumina corundum brick prepared by the invention, the bulk density is increased by 8.5% or more, the compression strength is increased by 20% or more, the high-temperature breaking strength is increased by 80% or more, the creep deformation is reduced by 40%, and the softening starting temperature under load is increased by 100 DEG C.

The invention discloses a potassium ferrate bottom-oriented enrichment slow-release agent and a preparation method and application thereof, and belongs to the technical field of bottom-oriented enrichment slow-release agents, and the preparation method comprises the following steps: S1, adding polyethylene glycol into water glass, dissolving, adding lithium hydroxide, acidifying, aging, washing, drying, grinding and calcining to obtain a modified carrier; s2, adding a potassium hydroxide solid into the hypochlorous acid solution, adding ferric hydroxide, continuously adding the potassium hydroxide solid, stirring at constant temperature, reacting to obtain a black purple solution, cooling, filtering and drying to obtain a potassium ferrate crude product; s3, adding the potassium ferrate crude product in the S2 into a 3M potassium hydroxide solution for dissolving, adding the modified carrier in the S1, stirring under an ultrasonic condition, then adding a potassium hydroxide solid to be saturated, keeping the temperature, standing, carrying out suction filtration, cleaning a filter cake, and drying to obtain a composite material; s4, grinding and sieving the composite material obtained in S3, mixing with a bottom enrichment agent, and tabletting to obtain a potassium ferrate bottom enrichment slow-release agent; the pond substrate can be improved.

The present invention relates to a bipolar electrodialysis apparatus for producing lithium hydroxide and sulfuric acid from a lithium sulfate solution. A bipolar electrodialysis apparatus (100) for producing lithium hydroxide and sulfuric acid from lithium sulfate comprises: a positive electrode (20) and a negative electrode (30) that face each other; a first bipolar film (40), an anion-selective dialysis film (60), a cation-selective dialysis film (70), and a second bipolar film (50) that are disposed between the positive electrode (20) and the negative electrode (30); and a porous first nickel foam (80) disposed on the plane of the positive electrode (20) to be in close contact with each other and a porous second nickel foam (90) disposed on the plane of the negative electrode (30) to be in close contact with each other, wherein the nickel foams (80, 90) have a porosity of 50-90%.

Disclosed are lithium borosilicate compositions consisting essentially of a system of lithium oxide in combination with silicon oxide and boron oxide, wherein the lithium borosilicate comprises between 70 and 83 atomic percent lithium based on the total atomic percent of lithium, boron and silicon, and wherein the lithium borosilicate is a glass.

The invention provides a preparation method of lithium sulfide, a product and application, and belongs to the technical field of synthesis of inorganic compounds. According to the method, anhydrous lithium hydroxide or lithium oxide is taken as a lithium source, sulfur dioxide is taken as an acidifying agent, hydrogen or methane is taken as a reducing gas, and lithium sulfide with high product purity and low carbon content is obtained through four steps of lithium source pretreatment, lithium sulfite intermediate synthesis, lithium sulfite reduction and product post-treatment in sequence; the method can be directly applied to high-end fields such as all-solid-state batteries and lithium-sulfur batteries, and particularly has important significance and wide industrial application prospects for breaking through the industrialization bottleneck of all-solid-state batteries.

A method for producing battery-grade lithium hydroxide monohydrate with low carbonate content from impure lithium feedstock, the method comprising: forming a concentrated lithium hydroxide solution saturated or nearly saturated with lithium hydroxide monohydrate; removing at least some lithium carbonate from the solution; crystallizing the lithium hydroxide monohydrate; and separating the crystallized lithium hydroxide monohydrate from the solution.

Embodiments disclosed herein are directed to lithium oxide systems, methods, and compositions. In various embodiments of the present disclosure, the systems, methods, and compositions are directed to micron-sized lithium oxide particles that are optimally dense and spherical for use in lithium battery applications.

The present invention relates to a method of making lithium hydroxide from lithium salts by reacting a lithium salt with an alkali metal hydroxide in an aqueous solution in the presence of ammonia.