12 results about "Sodium polysulfide" patented technology

The invention discloses a (Fe (OH) 2) ((OH) 0.25 (H2O) 0.5) / W18O49 composite material as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The preparation method comprises the following steps: uniformly mixing and stirring cyclohexanol, acetylacetone and absolute ethyl alcohol, adding tungsten hexachloride, uniformly stirring at room temperature, then adding ferric trichloride, uniformly stirring at room temperature, carrying out hydrothermal reaction, washing and drying to obtain the (Fe (OH) 2) ((OH) 0.25 (H2O) 0.5) / W18O49 composite material. A mixed system of cyclohexanol, acetylacetone and absolute ethyl alcohol is utilized to synergistically solve the problems of advanced hydrolysis and agglomeration of metal ions; the oxygen vacancy of the W18O49 accelerates the conversion of the sodium polysulfide, and the Fe (OH) 2 derivative strengthens the chemical anchoring of the sodium polysulfide, thereby realizing the synergy of the anchoring and rapid conversion of the NaPSs. When being used as a sodium-sulfur battery positive electrode material catalyst, the catalyst shows excellent catalytic performance and rate capability, and still has the capacity of 420 mAh g <-1 > after circulating for 25000 circles under the large current density of 10 A g <-1 >. The strong adsorption characteristic of the hydroxylated iron-based component and the high catalytic activity of W18O49 are utilized to form a synergistic effect, and a new scheme is provided for breaking through the technical bottleneck of an RT Na-S battery.

The invention relates to the technical field of preparation of organic silicon functional materials, and particularly discloses an integrated preparation method of bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane, which comprises the following steps: by taking a chloropropyl triethoxy silane-chloromethyl phenethyl triethoxy silane mixture as a raw material, carrying out one-step reaction on the raw material to obtain bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane, and carrying out one-step reaction on the bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane; in the whole process, a reaction system and process parameters are reserved and designed around the function of chloromethyl phenethyl triethoxy silane, and the overall production efficiency is improved by shortening the time consumption of a sodium sulfide synthesis procedure; the target mixed silane is prepared through four core processes of sodium sulfide synthesis, sodium polysulfide in-situ preparation, selective vulcanization in a phosphate buffer system and product homogenization in sequence. According to the invention, a one-step integrated preparation method is innovatively adopted to replace a traditional compounding process, the total impurity content of the product is less than 0.6%, the equipment investment cost is reduced, and the overall production efficiency is improved.

This invention discloses a WS2 / WO2 composite material, its preparation method, and its application in sodium-sulfur batteries, belonging to the field of functional material preparation technology. The method includes: mixing cyclohexanol and oleic acid evenly to obtain a mixed solvent; adding tungsten hexachloride to the mixed solvent and stirring at room temperature until dissolved to obtain a precursor solution; subjecting the precursor solution to a hydrothermal reaction, washing, and drying to obtain W2 / WO2. 18 O 49 Powder; W 18 O 49 After the powder and sulfur source undergo a thermally controlled reaction under an inert atmosphere, a WS2 / WO2 composite material is obtained. This invention prepares a WS2 / WO2 composite material with a unique three-dimensional heterostructure through a simplified two-step method. By integrating the strong adsorption properties of WS2 and the high catalytic activity of WO2, and through interfacial coupling, the conversion of sodium polysulfides is synergistically accelerated. At the same time, its preparation process is significantly more complex than existing technologies, and can effectively suppress the shuttle effect, improve reaction kinetics, and enhance battery cycle stability.

The invention discloses a process method for producing sodium sulfide from solid waste after waste lithium battery treatment. The process method comprises the following steps: step 01, material preparation section; 02, a preheating section; step 03, a calcining section; step 04, a heating section; step 05, evaporation section; step 06, a product packaging section; and pumping the sodium sulfide concentrated solution into a tabletting machine in a tabletting and packaging section, cooling and solidifying the sodium sulfide concentrated solution into a solid, blanking, slicing and packaging into a sodium sulfide product. According to the invention, resource utilization of the graphite slag as the solid waste is realized, and the economic benefit of the waste lithium battery product is improved. In the whole sodium sulfide production process method, a raw material preheating method and an indirect heating external heating type calcining rotary furnace are adopted, so that substances such as oxygen in water vapor and flue gas are not in contact with a reaction mixture, and side chemical reactions causing generation of impurities such as sodium carbonate, sodium thiosulfate or sodium polysulfide are avoided as far as possible from the source; therefore, the yield of the product is improved, the impurity content in the product is low, and the purity of the product is improved.

The application provides a method and equipment for separating selenium and tellurium from high-tellurium crude selenium raw materials. The method can selectively form tellurium polysulfide from tellurium in the crude selenium by adding sulfur in an alkaline solution, so that the metallic tellurium is converted into ions and enters the solution, and the main metallic selenium remains in the slag, thereby preliminarily and effectively separating the selenium and the tellurium, achieving a separation coefficient of 90.67%, and reducing the content of tellurium in the crude selenium raw material from 0.30% to 0.028%. The application has the advantages of good selenium and tellurium separation effect, simple operation, short process, and strong raw material adaptability.

The invention provides a preparation method and application of a multi-sulfur polymer. The preparation method comprises the following steps: mixing a dichloro intermediate and a sodium polysulfide aqueous solution, and carrying out condensation polymerization in a formed mixed system to prepare a polysulfide polymer; an organic solvent exists in the mixed system, and the organic solvent is selected from C6-C9 aromatic hydrocarbons. According to the preparation method disclosed by the invention, salt after condensation polymerization can be quickly and efficiently separated, so that the quality of liquid polysulfide rubber obtained during cracking of the polysulfide polymer is improved, and the production efficiency of a production device is greatly improved.

This invention relates to a sodium polysulfide-based cyanide-free zinc-inhibiting composite inhibitor for lead-zinc separation, comprising, by weight: 1-2 parts sodium polysulfide, 3-5 parts zinc sulfate, 1-4 parts sodium metabisulfite, and 0.1-1.5 parts organic selectivity modifier; the sodium polysulfide is Na₂S. x The formula is: x = integers from 2 to 4; the organic selective regulator is one of L-cysteine, tannin, and modified corn starch; sodium polysulfide is the core zinc-inhibiting component; zinc sulfate and sodium polysulfide work synergistically to enhance the inhibition effect on sphalerite; and the organic selective regulator further strengthens the selectivity of "inhibiting zinc but not lead," reducing lead mineral loss. This invention's composite inhibition does not require operation under strongly alkaline conditions; only neutral slurry is needed to achieve efficient inhibition, significantly reducing the amount of lime used and avoiding the problem of excessively high alkalinity in the return water. This reduces the neutralization cost of return water treatment and fundamentally solves the problem of scaling and clogging in return water and slurry pipelines.

This invention utilizes microwave-assisted rapid preparation of Ni-ZIF-8 derived carbon materials. Using this material as the main component, sulfur is loaded as the active material to prepare the cathode material, which is then assembled into an RT Na-S battery. The process is simple, structurally stable, and exhibits excellent electrochemical performance, possessing certain practical application value. By introducing metallic nickel to modify the basic structure of ZIF-8, the derivative acquires certain catalytic capabilities, and the precursor Ni-ZIF-8 is prepared using a simple synthetic reaction. Then, by introducing a microwave absorber, rapid carbonization is achieved under microwave irradiation to obtain the Ni-ZIF-8 derived carbon material. The drastic temperature change causes the bulk structure of the precursor to break down during carbonization, preserving the high specific surface area and abundant active sites of traditional ZIFs while enhancing the material's conductivity. Relying on the high specific surface area, abundant active sites, and excellent conductivity of the Ni-ZIF-8 derived carbon material, the synergistic effect of "physical adsorption-chemical adsorption-catalytic conversion" effectively suppresses sodium polysulfide shuttle, reduces internal battery polarization, and exhibits excellent electrochemical performance.

This invention discloses a lignin-derived carbon-coated NiS / TiO 2 Composite materials, their preparation methods, and applications. This invention uses sodium lignosulfonate as a carbon precursor and introduces TiO2, a substance with strong adsorption properties for sodium polysulfide. 2 NiS / TiO₂ with high specific capacity and good cycle stability was prepared by hydrothermal and calcination treatment. 2 / C composite material has a simple preparation process and low cost. As a high-energy-density and high-stability sodium-ion battery anode material, it is of great significance to the development of sodium-ion battery anode materials.

The application discloses modified mixed cat litter containing zeolite bentonite and a preparation method thereof, and belongs to the technical field of modified mixed cat litter preparation.The modified mixed cat litter containing zeolite bentonite is composed of the following components in parts by weight: 30-50 parts of modified cat litter, 10-20 parts of bentonite cat litter, and 0.1-0.3 parts of antibacterial agent, wherein the modified cat litter is prepared from corn straw, acrylic acid, zeolite, bean dregs, starch and polyacrylamide solution, and the antibacterial agent is prepared from ammonia water, methyl acrylate, sodium polysulfide, isopropylamine and sulfuryl chloride.The modified mixed cat litter prepared by the method has excellent water absorption rate, ammonia removal effect and antibacterial property.

This application belongs to the field of battery technology, specifically disclosing a battery cell, a method for preparing the battery cell, a battery device, and an electrical device. The battery cell provided in this application includes a positive electrode sheet, which includes a positive electrode active material. The positive electrode active material includes a sulfur-carbon composite material, which includes a porous carbon material and a sulfur-containing active material supported on the porous carbon material. The sulfur-containing active material includes any one or more of elemental sulfur, sodium sulfide, or sodium polysulfide. The porous carbon material has micropores and mesopores, which are interconnected to form a tortuous pore structure. The negative electrode sheet includes a sodium metal sheet. The battery cell provided in this application improves battery capacity by reducing the loss of positive electrode active material during battery cycling.

The invention discloses a three-dimensional stacked nano-beam Pd-W18O49 material and a preparation method and application thereof, and belongs to the technical field of functional materials.The method comprises the steps that cyclohexanol and acetone are evenly mixed, hexachloride is added, the mixture is evenly stirred, and W18O49 powder is obtained after hydrothermal reaction, washing and drying; and dissolving the W18O49 powder in a palladium acetate solution, carrying out a water bath reaction, washing again, and drying again to obtain the three-dimensional stacked nano-beam Pd-W18O49 material. The three-dimensional stacked nano-beam structure can provide a larger specific surface area and increase catalytic active sites; the ordered accumulation of the nano-beams is beneficial to the construction of a rapid electron transmission channel, and the electron conduction problem of the sulfur positive electrode is improved. Through the synergistic catalysis of rich oxygen vacancies and Pd and W18O49, the conversion reaction of sodium polysulfide is effectively accelerated, the shuttle effect is inhibited, and the charge-discharge efficiency, the cycle stability and the actual capacity of the battery are improved. A new breakthrough is brought to the performance improvement of the sodium-sulfur battery, and the practical application of the sodium-sulfur battery in the field of large-scale energy storage is promoted.