29 results about "Phosphorus sulfide" patented technology

The present invention provides a composite positive electrode for an all-solid-state lithium-sulfur battery and a method for preparing the same, belonging to the technical field of positive electrode materials for lithium-sulfur batteries. The composite positive electrode comprises a sulfur / carbon composite material with a gradient surface modification of phosphorus polysulfide and a solid electrolyte. The composite material comprises porous carbon, sulfur, and phosphorus polysulfide, with the sulfur loaded on the outer surface and / or in the pores of the porous carbon, and a phosphorus polysulfide layer with a gradient distribution of a specific structure on the surface of the sulfur / carbon composite. The present invention utilizes the sulfur / carbon composite material with a gradient surface modification of phosphorus polysulfide as a positive electrode material for an all-solid-state lithium-sulfur battery, effectively increasing the active sulfur content and specific capacity of the composite positive electrode layer. The composite positive electrode of the present invention can have an active sulfur content exceeding 50 wt%, a specific capacity calculated based on elemental sulfur exceeding 1300 mAh / g, and a specific capacity based on the total mass of the composite positive electrode exceeding 650 mAh / g. Furthermore, the composite positive electrode exhibits excellent cycle and rate performance.

The invention relates to a preparation method of a two-dimensional nano layered polymetallic phosphorus sulfide, which comprises the following steps: mechanically and uniformly mixing a lithium-containing transition metal precursor and P2S5 in an inert atmosphere, then heating for melting and calcining, adding a crude product into an alcohol-water solution, heating and stirring, centrifugally separating, washing a precipitate, and drying to obtain the two-dimensional nano layered polymetallic phosphorus sulfide. The chemical formula of the polymetallic phosphorus sulfide is LixM1aM2bM3cM4dM5ePS3, x is greater than or equal to 0 and less than or equal to 1.2, and M1, M2, M3, M4 and M5 are independently selected from Co, Fe, Mn, Ni, Ti, Cu, Zn, Cd, Cr and Mo; a + b + c + d + e = 1, and a, b, c, d and e > = 0; wherein the transverse size of the two-dimensional nano layered multi-transition metal phosphorus sulfide is 0.5-10 [mu] m, and the thickness of the nanosheet is 10-40 nm. According to the invention, the two-dimensional phosphorus sulfide nano layered material can be rapidly prepared through the reaction of the transition metal precursor and phosphorus sulfide, and the two-dimensional phosphorus sulfide nano layered material shows good activity and stability when being used as a Li-O2 battery solid electrolyte.

A method for producing a sulfide-based inorganic solid electrolyte material, the method including a step of obtaining a sulfide-based inorganic solid electrolyte material in a vitreous state by mechanically processing a raw material composition of the sulfide-based inorganic solid electrolyte material including lithium sulfide and a phosphorus sulfide composition such that each component is vitrified in a chemical reaction, in which the phosphorus sulfide composition has three or more peaks in a range of 2θ = 22.5° or more and 24.5° or less in an X-ray diffraction analysis spectrum obtained by X-ray diffraction analysis.

The invention discloses a zinc thiophosphate material with a yolk double-shell structure as well as a preparation method and application thereof, and relates to the technical field of sodium ion batteries. The preparation method comprises the following steps: firstly, preparing a ZIF-8 precursor template through a zinc source and solvothermal reaction of 2-methylimidazole, and then sequentially carrying out coating, template etching, synchronous carbonization and vulcanization treatment and phosphorus vulcanization treatment on the ZIF-8 precursor template to finally obtain the ZnPS3 / NC-C material with the yolk double-shell structure and excellent electrochemical performance. Compared with a traditional transition metal thiophosphate preparation process, the method is safer in process, and the yolk double-shell morphology of the metal phosphorus sulfide can be accurately regulated and controlled. Compared with pure zinc thiophosphate prepared by a traditional process, the prepared ZnPS3 / NC-C material with the yolk double-shell structure has the characteristics of hollow and porous characteristics, high specific surface area and structural stability, and shows relatively high first charge-discharge efficiency and excellent cycle stability when being used as a sodium-ion battery negative electrode material.

The preparation method comprises the following steps: (1) adding a lead salt and diammonium hydrogen phosphate into deionized water, stirring at room temperature, dropwise adding ammonia water into the deionized water in the stirring process, continuously stirring to obtain a mixed solution, adding the mixed solution into a hydrothermal kettle for reaction at the hydrothermal temperature of 100-200 DEG C for 10-30 hours, and filtering to obtain a filtrate; carrying out solid-liquid separation on a white product after the reaction to obtain a solid matter, drying the solid matter at 50-60 DEG C, and then carrying out high-temperature calcination to obtain lead phosphate powder; and (2) vulcanizing the lead phosphate powder to prepare the infrared detection material based on vulcanized lead phosphate. The prepared infrared detection material based on sulfurized lead phosphate is used for an infrared detector. The synthesis method has the beneficial effects that 1, the synthesis method is simple and low in cost, the used solvent is environment-friendly and green, and the synthesis method is suitable for large-scale production; and 2, the vulcanized lead phosphate disclosed by the invention has an ultra-low band gap and has the feasibility of infrared detection.

The invention relates to a preparation method of a two-dimensional nano layered polymetallic phosphorus sulfide, which comprises the following steps: mechanically and uniformly mixing a lithium-containing transition metal precursor and P2S5 in an inert atmosphere, then heating for melting and calcining, adding a crude product into an alcohol-water solution, heating and stirring, centrifugally separating, washing a precipitate, and drying to obtain the two-dimensional nano layered polymetallic phosphorus sulfide. The chemical formula of the polymetallic phosphorus sulfide is LixM1aM2bM3cM4dM5ePS3, x is greater than or equal to 0 and less than or equal to 0.86, and M1, M2, M3, M4 and M5 are independently selected from Co, Fe, Mn, Ni, Ti, Cu, Zn, Cd, Cr and Mo; a + b + c + d + e = 1, and a, b, c, d and e > = 0; wherein the transverse size of the two-dimensional nano layered multi-transition metal phosphorus sulfide is 0.5-10 [mu] m, and the thickness of the nanosheet is 10-40 nm. According to the invention, the two-dimensional phosphorus sulfide nano layered material can be rapidly prepared through the reaction of the transition metal precursor and phosphorus sulfide, and the two-dimensional phosphorus sulfide nano layered material shows good activity and stability when being used as a Li-O2 battery solid electrolyte.

The application discloses a solid-state polymer electrolyte containing two-dimensional nano additives and a preparation method and application thereof, and belongs to the technical field of lithium metal batteries. The preparation method of the solid-state polymer electrolyte is as follows: transition metal phosphorus sulfide precursors, lithium salt and polymer are added into a dispersing agent, stirring is conducted to strip the transition metal phosphorus sulfide and lithiumize, and a polymer electrolyte precursor solution is formed; and stirring is finished to obtain a mixture slurry; wherein the transition metal phosphorus sulfide precursors include one or more of FePS3, MnPS3, CdPS3 and ZnPS3; the mixture slurry is coated on a mold, and drying is conducted to obtain the solid-state polymer electrolyte containing two-dimensional nano additives. The preparation method is a one-step lithiumization method for preparing two-dimensional nano additives, is more simple than a two-step alkali metal ion lithiumization method, has no adverse effect on the performance of lithium batteries, and can avoid the introduction of impurity water.

Provided is a phosphorus sulfide composition for a sulfide-based inorganic solid electrolyte material, the phosphorus sulfide composition including P4S10 and P4S9, in which when a total content of P4S10, P4S9, P4S7, and P4S3 in the phosphorus sulfide composition is represented by 100 mass %, a content of P4S10 calculated from a solid 31P-NMR spectrum is 70 mass % or more and 99 mass % or less.

The invention relates to a self-storage voltage comparator, and belongs to the technical field of electronic components. The device comprises a substrate, a transition metal chalcogenide, a metal phosphorus-sulfur (selenide), a source electrode, a drain electrode and an input electrode, the metal phosphorus-sulfur (selenide) is located on the upper surface of the transition metal chalcogenide, and the input electrode is located on the upper surface of the metal phosphorus-sulfur (selenide). The source electrode and the drain electrode are located at the two ends of the transition metal chalcogenide and are electrically communicated with the transition metal chalcogenide. According to the invention, the transition metal chalcogenide and the metal phosphorus-sulfur (selenide) form an integrated device of a field effect transistor and a memristor, an input voltage is identified and compared by using a competitive mechanism between ferroelectricity and ionic conductivity of the metal phosphorus-sulfur (selenide), and a comparison result can be stored in a nonvolatile manner.

The invention discloses a lithium argyrodite sulfide solid electrolyte, a preparation method thereof and an all-solid-state battery, the chemical general formula of the electrolyte is Li7-xPS6-xMx, and the electrolyte is prepared from Li2S, LiM and excessively added P4Sy, wherein M represents halogen, 0 < = x < = 2, and y < = 10. The preparation method comprises the following steps: mixing Li2S, LiM and partially excessive P4Sy according to the stoichiometric ratio of the chemical general formula to obtain a precursor; and then preheating a container added with the residual excessive P4Sy, placing the precursor in the container, and sintering under a sealed condition to obtain the composite material. According to the method, excessive phosphorus sulfide is taken as a preparation raw material, the sealed crucible filled with the phosphorus sulfide is preheated, the ultra-high-purity lithium argyrodite sulfide solid electrolyte can be efficiently and stably synthesized, the conductivity of the electrolyte can reach 2.92 mS cm <-1 >, and the electrolyte is applied to an all-solid-state battery system.

The present invention relates to a method for manufacturing a sulfide-based solid electrolyte, the method comprising the steps of: (S1) preparing a precursor solution by adding a precursor containing an alkali metal sulfide, a phosphorus sulfide, and a halogen compound to a solvent; (S2) performing first milling on the precursor solution to prepare an intermediate product; (S3) adding a dispersant after the step (S2) and then performing second milling to adjust the particle size of the intermediate product; (S4) drying the particle size-adjusted intermediate product after the step (S3); and (S5) heat-treating the dried intermediate product, wherein the dispersant is an aliphatic compound, and the mass ratio of the solvent and the dispersant is 75: 1 to 150: 1.

Provided is a phosphorus sulfide composition for a sulfide-based inorganic solid electrolyte material, in which Reactivity measured by a predetermined method is greater than or equal to 5.0 °C / min.

The present disclosure is concerned with unsymnietrical phosphorus disulfide compounds and methods of making the same. 'The disclosed compounds can be useful as therapeutics, for example, anti-viral agents, anti-cancer reagents, and anti-alcoholism drugs. In addition, the disclosed methods are useful in that methods have the advantages of short reaction time, green solvent, high atom economy, and avoidance of using harsh reagents such as oxidants, chlorinating reagents, and transition metal catalysts. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

The invention relates to a preparation method of a two-dimensional nano layered transition metal phosphorus sulfide, which comprises the following steps: mechanically and uniformly mixing a transition metal precursor and P2S5 in an inert atmosphere, heating for melting and calcining, adding a crude product into an alcohol-water solution, heating and stirring, centrifugally separating, washing a precipitate, and drying to obtain the two-dimensional nano layered transition metal phosphorus sulfide. The two-dimensional nanometer layered transition metal phosphorus sulfide is obtained; the transverse size of the two-dimensional nano layered transition metal phosphorus sulfide is 1-20 microns, and the thickness of the nanosheet is 5-30 nm. Through simple process steps, the two-dimensional nano layered transition metal phosphorus sulfide which is difficult to obtain by a conventional method can be obtained, the special morphology has abundant active sites exposed on the surface, and the reaction kinetics of the Li-O2 battery is accelerated; and meanwhile, the nanosheet structure can provide more geometric spaces and improve the charge-discharge specific capacity of the battery, so that the Li-O2 battery positive electrode catalyst can show excellent performances of high specific capacity, low overpotential and long cycle life.

To provide a method for producing a phosphorus sulfide composition, which can stably yield a sulfide inorganic solid electrolyte material with improved lithium ion conductivity, a method for producing a sulfide inorganic solid electrolyte material and a method for evaluating a phosphorus sulfide composition.SOLUTION: A method for producing a phosphorus sulfide composition includes the step of selecting a phosphorus sulfide composition that includes three or more peaks in the range of 2θ=22.5° or more and 24.5° or less, in an X-ray diffraction analysis spectrum.SELECTED DRAWING: None

This disclosure provides systems, methods, and apparatus related to lithium phosphorus sulfide halide-polymer composites. In one aspect, a lithium phosphorus sulfur halide (LiPSX) solution and a polymer solution are provided. X is chlorine, bromine, iodine, or combinations thereof. LiPSX of the LiPSX solution and a polymer of the polymer solution are precipitated by mixing the LiPSX solution and the polymer solution. A LiPSX solvent of the LiPSX solution and a polymer solvent of the polymer solution are removed from the LiPSX and the polymer to form polymer-embedded LiPSX.

The invention provides a fly ash slag and sludge synergistic stabilization treatment method which comprises the following steps: S1, adding a composite conditioner into sludge, destroying a colloid structure through microwave-assisted heating, and synchronously reducing the moisture content from 80% to 35% or below in combination with plate-frame pressure filtration; s2, 3%-5% of modified zeolite is doped, free water is preferentially adsorbed, a microporous water locking structure is formed, and moisture remigration in the subsequent curing reaction is avoided; in order to solve the problem of high water content of sludge, a microwave-chemical coupling dehydration and modified zeolite water locking technology is adopted, the water content is reduced from 80% to 35% or below, the upper limit of traditional curing water content 60% is broken through, water interference is eliminated through a staged dry-wet mixing process, and meanwhile, due to the fact that the heavy metal locking time is short, the water content is reduced to 30% or below. A double-effect stable system of vulcanization-phosphate chemical precipitation and geopolymer physical wrapping is constructed, slow-release pH regulation and hydrophobic membrane protection are combined, the locking life is prolonged to 3 times that of a traditional method, and strength improvement and long-acting stability collaborative optimization are achieved.

The invention relates to a wet-process phosphoric acid deep cadmium removal method based on dialkyl dithiophosphate, which comprises the following steps: (1) taking mixed alcohol of one or more than one straight-chain or branched-chain alcohol as a raw material, reacting with phosphorus pentasulfide, filtering to obtain thiophosphoric acid filtrate, and reacting the thiophosphoric acid filtrate with metal oxide to synthesize dialkyl dithiophosphate (DDP); (2) roughly dividing the conventional wet-process phosphoric acid process into phosphorite pretreatment, phosphorite decomposition, dilute acid sedimentation, dilute acid concentration and concentrated acid sedimentation; and mixing the DDP with the cadmium-containing wet-process phosphoric acid slurry, dilute phosphoric acid or concentrated phosphoric acid for reaction to generate hydrophobic cadmium complex precipitate, and filtering after the reaction is finished to obtain purified phosphoric acid, thereby realizing removal of cadmium. According to the method, no HS gas is generated, and occupational hazards are avoided; raw material cost is low; the cadmium removal rate is gt; the phosphorus loss is as low as 0.5%; the method is suitable for wet-process phosphoric acid slurry, dilute phosphoric acid and concentrated phosphoric acid and can be directly integrated to an existing production line, the cadmium content of the cadmium-containing phosphoric acid after cadmium removal is smaller than or equal to 2 ppm, and the phosphorus loss rate is smaller than or equal to 3%.

Provided is a phosphorus sulfide composition for a sulfide-based inorganic solid electrolyte material, in which Reactivity measured by a predetermined method is greater than or equal to 5.0° C. / min.

A solid electrolyte for an all solid state lithium battery includes lithium phosphorus sulfide(LPS), which has been doped during synthesis with a metal halide, such as zirconium tetrachloride. The synthesis includes adding the metal halide to lithium sulfide and phosphorus pentasulfide precursor materials, followed by ball milling and heat treatment.

The application belongs to the technical field of battery materials, and specifically discloses a Cs + intercalated high-entropy phosphorus sulfide / MXene composite fiber material, a preparation method, application and battery thereof. + The intercalated high-entropy metal phosphorus sulfide fiber and the MXene nanosheet are self-assembled, the Cs + The mass ratio of the intercalated high-entropy metal phosphorus sulfide fiber to the MXene nanosheet is (4-22):1, wherein the Cs + The intercalated high-entropy metal phosphorus sulfide fiber is Cs 0.3 Mn 0.45 Cd 0.1 Fe 0.1 Ni 0.1 Co 0.1 PS3. The composite fiber of the application has a diameter of hundreds of nanometers and a length of tens of micrometers, and exhibits excellent rate performance and cycle stability, and can have a specific capacity of 350-450 mAhg ‑1 after 1000 cycles of charge and discharge at a large current density of 10 Ag ‑1 .

This invention discloses a three-dimensional flower-like Ni x P y -Ni x S y Preparation methods and applications of composite structures belong to Ni x P y -Ni x S y In the field of composite material preparation, this method uses nickel nitrate hexahydrate, ammonium fluoride, and urea to prepare a reaction solution, and then conducts a high-temperature sealed reaction to prepare a sample, which reacts with phosphorus powder to produce pure-phase Ni. x P y And further react with sulfur powder to form Ni composite material. x P y -Ni x S y This process generates Ni atoms with regular morphology and excellent dispersion. x P y -Ni x S y The composite material has a relatively large specific surface area, forming more active contact points. At the same time, the reaction temperature of this synthesis method is much lower than the high temperature required by other methods, which makes it easier to control the particle size. Therefore, it is easier to estimate the turnover frequency and evaluate the relative reactivity of the crystal facets. It also reduces the emission of toxic and harmful gas PH3, significantly improves the phosphating efficiency, and for the first time applies transition metal phosphorus sulfides to the field of humidity sensing to construct a new type of humidity sensor.

The invention belongs to the technical field of high-entropy electrode materials and electro-catalysis, and particularly relates to a high-entropy phosphorus sulfide self-supporting electrode material and a preparation method and application thereof. The electrode material comprises a conductive substrate and a catalytic active component, the catalytic active component is a high-entropy phosphorus sulfide which is prepared by performing high-temperature heat treatment on a high-entropy Prussian blue analogue precursor, a phosphorus source and a sulfur source; wherein the chemical general formula of the high-entropy Prussian blue analogue precursor is [M (II)] [Fe (CN) 6], and M (II) is at least three of Mn, Zn, Co, Fe, Ni and Cu; and each M (II) metal element accounts for 5%-35% of the mole percentage of all the M (II) metal elements. The high-entropy Prussian blue analogue precursor, a phosphorus source and a sulfur source are subjected to high-temperature heat treatment, and phosphorus and sulfur elements are successfully introduced into a high-entropy Prussian blue analogue skeleton. The non-metallic element doping can effectively adjust the electronic structure of the material and significantly reduce the oxygen evolution reaction energy barrier, thereby enhancing the intrinsic catalytic activity.

The invention provides a urea oxidation electro-catalysis electrode based on a thin-layer transition metal phosphorus sulfide type catalyst and a preparation method of the urea oxidation electro-catalysis electrode, and belongs to the technical field of water electrolysis hydrogen production assisted by electro-catalysis urea oxidation. The preparation method comprises the following steps: firstly, preparing a thin-layer transition metal phosphorus sulfide type urea oxidation electrocatalyst by using an intercalation stripping agent assisted ultrasonic stripping method, then preparing the thin-layer transition metal phosphorus sulfide type urea oxidation electrocatalyst into catalyst ink, and further loading the catalyst ink on an electrode substrate. The urea oxidation electro-catalysis electrode based on the thin-layer transition metal phosphorus sulfide type catalyst is obtained. According to the invention, effective preparation of the thin-layer transition metal phosphorus sulfide type catalyst can be realized, active sites of transition metal sulfur phosphide can be effectively exposed, and the thin-layer transition metal phosphorus sulfide type catalyst can show excellent catalytic activity in a urea oxidation assisted water electrolysis hydrogen production reaction system; and the method has relatively high practicability and application value.

The invention provides a sulfide solid electrolyte, a preparation method thereof and an all-solid-state battery, and relates to the technical field of batteries. The method comprises the following steps: mixing and grinding lithium sulfide and phosphorus sulfide to obtain a non-crystallized mixture, and then carrying out first heat treatment and refining on the non-crystallized mixture to obtain a first mixture with fine particles and fine powder; meanwhile, lithium sulfide and halogen lithium salt are mixed and granulated, and a granular second mixture is obtained; and finally, obtaining the sulfide solid electrolyte according to the first mixture and the second mixture. The sulfide solid electrolyte prepared by the method has a heterogeneous halogen concentration gradient core-shell structure, and can improve the stability of air / water on the premise of not reducing the ionic conductivity, that is, the synergistic improvement of the ionic conductivity and the air / water stability is realized.

The application discloses a method for preparing an iron-based phosphorus sulfide array material by one-step phosphorus sulfuration and application thereof, and belongs to the technical field of humidity sensors. The application aims at solving the problems of the existing method for preparing the phosphorus sulfide iron material, i.e., the regular morphology cannot be obtained by adjusting the reactants, the synthesis method is difficult, the steps are complex, the efficiency is low, by-products are easily produced, and the synthesis raw materials are harmful to the environment. The method comprises the following steps: firstly, dissolving ferric chloride hexahydrate and anhydrous sodium sulfate in water, and immersing a carrier in the mixed solution to perform a hydrothermal reaction, so as to obtain a carrier with in-situ grown nanorod-shaped FeOOH precursors; and secondly, placing the carrier with in-situ grown nanorod-shaped FeOOH precursors and sulfur powder in one porcelain boat, placing red phosphorus in another porcelain boat, and then sequentially placing the two porcelain boats in a tube furnace for heating and heat preservation. The application is applied to the preparation of a humidity sensor.

The invention discloses an in-situ preparation method of a vanadium-doped difunctional nickel-iron-based phosphorus sulfide heterostructure and application of the vanadium-doped difunctional nickel-iron-based phosphorus sulfide heterostructure in electro-catalysis full hydrolysis, and relates to a preparation method and application of a phosphorus sulfide heterostructure. The invention aims to solve the problems that the existing efficient catalyst for electro-catalytic hydrogen evolution and oxygen evolution is expensive and rare, and the low-cost non-noble metal electro-catalyst is relatively low in catalytic activity and only can realize single-function hydrogen evolution or oxygen evolution, so that the actual application of the catalyst is hindered. The method comprises the steps of 1, foam nickel pretreatment; 2, primary hydrothermal reaction; 3, carrying out secondary hydrothermal reaction; and 4, low-temperature gas phase treatment. The invention relates to application of a vanadium-doped bifunctional nickel-iron-based phosphorus sulfide heterostructure as a bifunctional catalyst in electro-catalysis full hydrolysis. A two-step hydrothermal synthesis method and a low-temperature gas phase method are adopted, the preparation method is simple and low in cost, and a new way is developed for a bifunctional catalyst material for electro-catalytic hydrogen evolution and oxygen evolution reaction under the alkaline condition and high current density.

The present invention relates to a method for manufacturing a sulfide-based solid electrolyte, comprising the steps of: preparing a precursor solution by adding a precursor containing an alkali metal sulfide, a phosphorus sulfide, and a halogen compound to a solvent (S1); milling the precursor solution to manufacture an intermediate product (S2); drying the intermediate product (S3); thermally treating the dried intermediate product (S4); and cooling the product obtained by the thermal treatment (S5), wherein the step of thermally treating the dried intermediate product (S4) comprises raising temperature from room temperature to a thermal treatment temperature according to formula 1 below, and then maintaining the temperature for a holding time of 10 seconds to 20 seconds. [Formula 1] Tg + 80°C ≤ T ≤ Tg + 150°C wherein Tg is the glass transition temperature of the dried intermediate product.