82results about "Sulfide/polysulfide preparation" patented technology

The present invention relates to the working principle and production methods for the pre-expansion of sulfur and / or other chalcogenides such as selenium or tellurium, and / or a mixture of any two or more. The present invention further relates an electrode / cathode comprising sulfur and / or a mixture of sulfur allotropes, for example, crystalline, glassy, amorphous, and / or polymeric (e.g., β-, γ-, and / or ω-phasic) sulfur and / or a mixture of any two or more sulfur allotropes, wherein the sulfur is photonically / electronically / thermally pre-expanded to a state where it has a density equivalent to a metal sulfide, such as Li2S. The expansion is carried out before electrode / cathode fabrication for the realization of alkali and / or alkali earth metal / ion batteries, such as LiS batteries. The resulting pre-expanded chalcogenides such as sulfur has an artificially generated internal cavities / porosity in addition to an open / external porosity, wherein the internal cavities limits and / or compensates the expansion of sulfur further or expansion partially / negligibly during chemical / electrochemical reactions, such as lithiation or sodiation, with mono, di, and trivalent metal ions. A thus fabricated electrode / cathode comprising pre-expanded sulfur and / or chalcogenides allows precise control over density and volume fluctuations and withstands the chemical and electrochemical reactions that occur during battery operation. Additionally, leads to improved performance, and longevity and offers significant potential for further technological developments in this field.

The invention discloses a sulfur disproportionation-mediated low-temperature high-efficiency low-carbon denitrification and synchronous ammonium recovery method for sewage, belongs to the field of sewage treatment, and aims to solve the problems that an existing autotroph denitrification process cannot adapt to water quality fluctuation and seasonal variation and is poor in engineering applicability. Polyculture denitrification and elemental sulfur disproportionation (SD) are used as an effective enhanced denitrification scheme and are applied to a low-temperature SDAD system of actual sewage. Sulfide and polysulfide generated in situ through elemental sulfur disproportionation reaction and low-concentration sodium acetate under the polyculture condition are used as supplementary electron donors, so that the denitrification rate is remarkably increased. The process of reducing dissimilatory nitrate into ammonium (DNRA) in the SD-MixBNR system is beneficial to emission reduction of greenhouse gases while realizing ammonium recovery. According to the method, the SD-MixBNR system can be promoted to be widely applied to actual engineering projects under the carbon neutralization background, and the stability and adaptability of the SD-MixBNR system in the face of various water quality fluctuations and seasonal changes are enhanced.

The invention relates to the field of nano materials and photonic crystal materials, in particular to nano particles, preparation of the nano particles and application of the nano particles in self-assembly of three-dimensional non-close-packed photonic crystals. The nanoparticles can be self-assembled into a three-dimensional non-close-packed photonic crystal in a concentration range of 1 wt%-60 wt%. According to the invention, the problem that the self-assembly of the three-dimensional non-close-packed colloid photonic crystal is difficult to realize at low concentration at present is solved. By adjusting the mass fraction of the particles in a solution, the three-dimensional non-close-packed colloidal photonic crystal with rich colors can be formed through self-assembly, and the three-dimensional non-close-packed colloidal photonic crystal has wide application prospects in the fields of sensing, display and the like.

Provided is a production method for semiconductor nanoparticles that can exhibit band edge emission at a short peak emission wavelength. The production method for semiconductor nanoparticles involves obtaining a first mixture that includes a Ag salt, an In salt, a compound that includes Ga and S, and an organic solvent and performing a heat treatment on the first mixture at a temperature of 125°C–300°C to obtain first semiconductor nanoparticles.

Provided is a method for producing a sulfide solid electrolyte, the method comprising mixing a starting material-containing substance containing a lithium atom, a phosphorus atom, a sulfur atom and a halogen atom in an organic solvent to produce a mixture and subjecting the mixture to irradiation with microwaves. Thus, a method for producing a sulfide solid electrolyte is provided, in which a heating temperature is decreased by employing a liquid phase method to suppress the granulation by heating and therefore a sulfide solid electrolyte that keeps the particle diameters thereof can be efficiently produced.

The present application relates to the technical fields of wastewater purification and energy storage material, and discloses an energy storage carbon material, a preparation method and application thereof.The method comprises the following steps: carbonizing biomass waste enriched with metal ions to obtain an energy storage carbon material.The energy storage carbon material can be used to prepare a secondary metal / ion battery.The energy storage carbon material prepared by the present application can promote the uniform deposition of metal in the charging and discharging process, avoid the safety problems caused by dendrite growth, and at the same time, the metal ions in industrial wastewater can be used to prepare high-value-added secondary battery energy storage materials by means of a simple and low-cost method of biosorption.

This invention discloses a superhydrophobic unsaturated transition metal chalcogenide compound, its synthesis method, and its applications. The invention involves heating chalcogenide powder to above its melting temperature to form a molten chalcogenide. This molten chalcogenide is then mixed with a reducing agent to undergo a disproportionation reaction. A strongly acidic solution containing transition metal cations is then added for aging, yielding a transition metal chalcogenide compound with a uniform porous structure, numerous surface defect sites, and a superhydrophobic surface. This transition metal chalcogenide compound exhibits good water resistance and high selective adsorption performance for nonpolar atoms and molecules, making it suitable for the removal of heavy metals or oxides from high-humidity flue gas. Furthermore, its unique porous structure and numerous catalytically active sites demonstrate good adsorption, capture, and catalytic conversion activity for oxidizing gases, making it suitable as an electroreduction catalyst.

A compound containing a repeating unit represented by formula (1) as a non-cyclic structure. (In formula (1), X1 represents an oxygen atom. In addition, R represents a hydrogen atom or a substituent. > # imgabs0 #

Disclosed is a method for producing a sulfide solid electrolyte powder, the method comprising: a step of obtaining a starting material mixture by mixing staring materials; a step of synthesizing at least one of a sulfide powder or a sulfide precursor powder from the starting material mixture; a step of obtaining a sulfide solid electrolyte powder by heating the above-described powder in a heating area; a step of transferring the sulfide solid electrolyte powder to a cooling area; and a step of cooling the sulfide solid electrolyte powder in the cooling area, while flowing an inert gas therethrough. With this method for producing a sulfide solid electrolyte powder, the heating area and the cooling area are separated from each other.

The solid electrolyte has: first crystallites formed on primary particles and having a first crystal structure; a second crystallite formed in the same primary particle as the first crystallite and having a second crystal structure different from the first crystal structure; and an amorphous phase, the first crystallites and the second crystallites each contain lithium, the first crystal structure is a hexagonal crystal, the second crystal structure is an orthorhombic crystal, and both the crystallite size of the first crystallites and the crystallite size of the second crystallites are 50 nm or less.

The invention discloses a two-dimensional MBene-metal sulfide composite material and a preparation method and application thereof, and belongs to the technical field of electromagnetic wave-absorbing materials.Metal sulfide is used for controlling the stripping process of two-dimensional MBene, and a heterostructure of a two-dimensional MBene nanosheet loaded with evenly-dispersed metal sulfide particles is obtained through a high-temperature hydrothermal reaction; the two-dimensional MBene-metal sulfide composite material prepared by the preparation method disclosed by the invention has excellent electromagnetic performance due to the dielectric loss enhanced by the heterostructure and the nano effect of the metal sulfide. The metal sulfide intercalation strategy provided by the invention lays a foundation for the development of advanced two-dimensional electromagnetic absorption materials, and provides a universal method for the development of other two-dimensional nanosheets with adjustable structures.

The present invention relates to a method of preparing a sulfide electrolyte. According to one aspect of the present invention, a method of preparing a sulfide electrolyte of the present invention includes: a moisture control step of controlling the moisture content in a solvent; a step of preparing a precursor solution by stirring a precursor and the solvent with the controlled moisture content; and a powder synthesis step of synthesizing electrolyte powder using the precursor solution.

Provided is a method of producing semiconductor nanoparticles exhibiting band-edge emission with a short emission peak wavelength. The method of producing semiconductor nanoparticles comprises: obtaining a first mixture that contains a Ag salt, an In salt, a compound containing Ga and S, and an organic solvent; and performing a heat treatment of the first mixture at a temperature in a range of 125° C. or higher and 300° C. or lower to obtain first semiconductor nanoparticles.

The subject matter of the invention provides a viable solvent treatment method for manufacturing surface-modified alkali metal sulfides or alkali metal thiophosphates, especially surface-modified lithium thiophosphates, e.g. Li6PS5Cl (mLi6PS5Cl). Utilizing nonpolar organic solvents to reduce the concentration of additives with Lewis-basic activity, the surface of, for example Li6PS5Cl, is modified to improve the ionic conductivity of electrolytes of type Li6PS5Cl or other lithium thiophosphates.

This solid electrolyte has: a first crystallite which is formed into a primary particle and has a first crystal structure; a second crystallite which is formed into the same primary particle as the first crystallite and has a second crystal structure that is different from the first crystal structure; and an amorphous phase. The first crystallite and the second crystallite each contain lithium, the first crystal structure is a hexagonal crystal structure, the second crystal structure is an orthorhombic crystal structure, and the crystallite size of the first crystallite and the crystallite size of the second crystallite are both 50 nm or less.

The invention discloses a method for assisting in stripping transition metal sulfide by expanding interlayer spacing through solvent vaporization, relates to the technical field of nano material preparation, and aims at solving the technical problem that the single-layer yield of the transition metal sulfide is low due to the fact that an existing liquid phase ultrasonic stripping technology is insufficient to completely or thoroughly destroy Van der Waals force between bulk phase material layers. The method for assisting in stripping the transition metal sulfide by expanding the interlayer spacing through solvent vaporization comprises the following steps: dissolving the transition metal sulfide in a first solvent to obtain a first solution; the concentration of the transition metal sulfide in the first solution is 1-8 mg / ml; heating the first solution until the first solvent in the first solution is completely volatilized to obtain residues; after the residues are dissolved in a second solvent, ultrasonic treatment is carried out, and dispersion liquid is obtained; collecting supernate of the dispersion liquid; the supernatant contains the stripped transition metal sulfide. The technical scheme provided by the invention is used for providing the method for assisting in stripping the transition metal sulfide by expanding the interlayer spacing through solvent vaporization.

The present invention provides a hydrogen sulfide-based solid electrolyte compound for an all-solid-state battery represented by formula 1, a method for preparing the compound, and an all-solid-state battery using the compound.

The present invention relates to a sulfide-based solid electrolyte comprising lithium (Li), phosphorus (P), sulfur (S) and a halogen element and having an argyrodite-like crystal structure, wherein at least a part of the crystal structure is doped with one or more first doping elements selected from Group 13 elements and one or more second doping elements selected from Group 14 elements.

To provide an exhaust gas treatment device capable of suppressing damage of a component constituting a combustion chamber and removing sulfur dioxide even when treating exhaust gas containing highly concentrated hydrogen sulfide at high temperature.SOLUTION: An exhaust gas treatment device is a device for treating exhaust gas containing hydrogen sulfide. The exhaust gas treatment device includes: a combustion furnace for burning and converting hydrogen sulfide included in exhaust gas into sulfur dioxide; and a scrubber that causes the sulfur dioxide converted in the combustion furnace to come into contact with an alkaline aqueous solution for conversion into subsulfate. The combustion furnace 11 includes: a first introduction pipe 21 for introducing exhaust gas; a second introduction pipe 22 for introducing combustible gas and combustion supporting gas; and a combustion chamber 23 connected to the first introduction pipe 21 and the second introduction pipe 22. In a component constituting the combustion chamber 23, silica glass is present on a surface on an indoor side of the combustion chamber 23.SELECTED DRAWING: Figure 2

The present invention discloses a method for exfoliating two-dimensional materials based on the synergistic effect of resonance crushing and crystal growth, comprising: crushing a bulk material and uniformly dispersing it in a solvent to form a dispersion; freezing the dispersion to form a solid material; placing the solid material in a low-temperature environment where the temperature is lower than or equal to the freezing point of the solvent, and subjecting the solid material to ultrasonic treatment to resonate the solvent crystallized between layers, so that at least part of the crystallized solvent is crushed, and at the same time enabling the liquid solvent in the surrounding environment to enter the broken gaps and continue to solidify and crystallize in this low-temperature environment. With the continuous crushing and growth of the crystals between the material layers, two-dimensional materials are finally exfoliated from the bulk material; the surface tension of the solvent matches the surface energy of the two-dimensional material. The method for exfoliating two-dimensional materials of the present invention is convenient to operate, has a small solvent usage amount, high exfoliation efficiency, good quality of the exfoliated two-dimensional materials, is suitable for large-scale production, and has potential industrialization value.

The subject matter of the invention provides a viable solvent treatment method for manufacturing surface-modified alkali metal sulfides or alkali metal thiophosphates, especially surface-modified lithium thiophosphates, e.g. Li6PS5Cl (mLi6PS5Cl). Utilizing nonpolar organic solvents to reduce the concentration of additives with Lewis-basic activity, the surface of, for example Li6PS5Cl, is modified to improve the ionic conductivity of electrolytes of type Li6PS5Cl or other lithium thiophosphates.

This layered material nanosheet production method comprises a detachment step for detaching, in a layer form, layered material particles by irradiating the layered material particles with microwaves while cooling the layered material particles.

The invention relates to an exciton luminescence regulation and control method of a transition metal chalcogenide. The method comprises the following steps: S1, obtaining a two-dimensional layered transition metal chalcogenide; s2, putting the two-dimensional layered transition metal chalcogenide into a sample boat, putting the sample boat into a tubular furnace, putting the tubular furnace into a second temperature zone, and putting S powder, Se powder or Te powder into the first temperature zone of the tubular furnace; s3, annealing treatment is conducted on the two-dimensional layered transition metal chalcogenide, the temperature of the second temperature zone in the tubular furnace is controlled to range from 100 DEG C to 350 DEG C, hydrogen-containing gas is introduced into the tubular furnace, the hydrogen flow ranges from 1 sccm to 8 sccm, and the annealing time ranges from 10 min to 60 min; and S4, keeping the ventilation state, cooling the tubular furnace, and taking out the sample boat to obtain a target product. The method can be used for adjusting the vacancy of the chalcogenide element of the two-dimensional layered transition metal chalcogenide material to obtain the material with high exciton luminescence quality.

This application provides an anode material, a composite anode material, a preparation method thereof, a secondary battery, and a terminal device. The anode material includes a core (01) and a coating layer (02) disposed on a surface of the core. The core (01) is a substance that can be reversibly inserted into or removed from a cathode material active ion or a substance that can perform reversible oxidation-reduction reaction with the cathode material active ion. A material of the coating layer (02) includes AxMy, where 0<x≤3, 0<y≤7, A is a substance that is the same as the cathode material active ion, and M includes at least one of P, S, Se, Te, Sn, or Ge. The anode material has characteristics of a good cycle stability and a long service life.

Provided is a compound comprising repeating units represented by formula (1) as a noncydic structure. (In formula (1), X1 is a chalcogen atom. R is a hydrogen atom or a substitution group.)

The present invention has a crystal structure according to an aspect of the present invention, and contains: at least one element A selected from the group consisting of a lithium element, a sodium element, and a potassium element; a phosphorus element; at least one element M selected from the group consisting of an aluminum element and a boron element; a nitrogen element; and at least one halogen element. The molar ratio (A / P) of the content of the element A to the content of the phosphorus element is less than 3.74, and the molar ratio (N / P) of the content of the nitrogen element to the content of the phosphorus element is less than 0.33.

The invention provides a method for sintering battery powder needing atmosphere protection, which comprises the following steps of: firstly, in an atmosphere protection environment, filling the battery powder into a customized sintering crucible, and sealing; then the sealed sintering crucible is moved out of the atmosphere protection environment and placed in a high-temperature sintering furnace for high-temperature sintering; and finally, the sintered crucible is moved to the atmosphere protection environment again, after cooling, the sintered crucible is opened, and the sintered battery powder is refined and subpackaged. The sintering crucible capable of containing the battery powder is designed, the process of filling the battery powder into the sintering crucible is carried out under atmosphere protection, and the sintering crucible is moved out of the atmosphere protection environment after filling is finished; then the sintering crucible is placed in a high-temperature sintering furnace for high-temperature sintering, in the process, the sintering crucible is in a sealed state, external air can be prevented from entering the sintering crucible, and therefore the high-temperature sintering furnace does not need to be in an atmosphere protection environment, and the complexity of equipment and the production cost are reduced.

Provided are an exhaust gas treatment device, an exhaust gas treatment method, and a method for producing a sulfide compound, the exhaust gas treatment device being capable of suppressing damage to components constituting a combustion chamber even when an exhaust gas containing a high concentration of hydrogen sulfide is treated at a high temperature, and being capable of performing a treatment of removing sulfur dioxide. And the waste gas treatment device is used for treating waste gas containing hydrogen sulfide. This exhaust gas treatment device is provided with: a combustion furnace for combusting hydrogen sulfide contained in exhaust gas and converting the hydrogen sulfide into sulfur dioxide; and a scrubber for converting the sulfur dioxide converted in the combustion furnace into sulfite by bringing the sulfur dioxide into contact with an alkaline aqueous solution. A combustion furnace (11) is provided with a first introduction pipe (21) for introducing exhaust gas, a second introduction pipe (22) for introducing combustible gas and combustion-supporting gas, and a combustion chamber (23) connected to the first introduction pipe (21) and the second introduction pipe (22). A member constituting the combustion chamber (23) is provided with quartz glass on the surface of the inner side of the combustion chamber (23).

Methods for producing metal sulfides generally include combining an alkali metal sulfide and a metal halide in an aprotic solvent to produce a mixture that includes an alkali metal halide and a metal sulfide. Additional methods include combining a first alkali metal sulfide, a second alkali metal sulfide, and a metal halide in an aprotic solvent to produce a mixture that includes a first alkali metal halide, a second alkali metal halide, and a metal sulfide. The methods may include adding a second solvent to cause an alkali metal halide to precipitate out of the mixture and improve the purity of the metal sulfide.