15results about How to "Increase layer spacing" patented technology

This invention provides a hard carbon material, its preparation method, and its application. The preparation method includes the following steps: heating, mixing, and granulating a precursor, dopant, molten salt agent, and curing agent to obtain mixed particles; and carbonizing the mixed particles to obtain the hard carbon material. The preparation method of this invention, through the synergistic effect of heteroatom doping and molten salt etching, combined with mixed granulation, ensures the effectiveness of doping and etching, increases the interlayer spacing of the hard carbon material, introduces additional graphite microcrystal defects and active centers, and increases defects on the surface and edges of the carbon layer, thereby improving the cycle and rate performance of sodium-ion batteries.

The application belongs to the technical field of fertilizers, and particularly relates to a humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate and a preparation method thereof. The humic acid organic-inorganic compound fertilizer comprises the following raw materials in parts by weight: 22-30 parts of biogas residue, 35-55 parts of humic acid, 8-13 parts of fine columnar algae powder, 5-8 parts of urea, 12-17 parts of ammonium sulfate, 12-15 parts of superphosphoric acid calcium, 15-20 parts of potassium sulfate and 10-15 parts of slow release coating suspension. Test results show that the humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate prepared by the application can reduce the nitrogen and phosphorus release rates of the humic acid inorganic compound fertilizer, has better slow release effect, significantly promotes the plant height, stem diameter and root length of soybeans and corn, has obvious growth promotion effect, and has wide application prospect.

This application relates to the field of energy storage materials technology, and more particularly to a titanium-based active material, its preparation method, and its application. The titanium-based active material comprises a mixed oxide having a layered perovskite structure, the mixed oxide having the general chemical formula shown in Formula 1, M... 2± a La x‑y M1 y B n‑z M2 Z O (3n+1)‑δ Q δ Formula 1; in Formula 1, the M site includes H and / or an alkali metal element; the M1 site includes at least one of Mg, Ca, Sr, Ba, and rare earth elements; the M2 site includes a specified transition element and at least one of Al, Ga, In, Si, Sn, Sb, and Bi; the Q site includes at least one of F, Cl, Br, I, N, and S; the B site satisfies: Nb 2n‑3x‑z Ti 3x‑n Or Nb 2n‑3x Ti 3x‑n‑z This titanium-based active material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

The application belongs to the field of nanomaterials and electrocatalysis, and specifically designs a single-atom electrocatalyst, which is formed by carbonizing a precursor mixed with nitrogen-containing organic matter and transition metal salt in a way parallel to single-atom generation. The nitrogen-doped carbon nanosheet prepared from the metal salt has the characteristics of rich pore structure, large specific surface area and high graphitization degree, and can capture single-atom metal to form a single-atom catalyst. In the preparation process, the transition metal salt acts as a template, a metal source and a pore-forming agent, and has a catalytic effect on the formed carbon material, thereby improving the graphitization degree of the carbon material. The single-atom catalyst prepared by the application has a high specific surface area and a developed pore size structure, which improves the exposure rate of active sites, and the carbon with a high graphitization degree not only improves the conductivity but also improves the corrosion resistance of the catalyst in an alkaline environment, thereby improving the stability of the catalyst.

This invention relates to the field of zinc-ion battery technology, and more particularly to a zinc-ion battery using vanadium pentoxide as the positive electrode material and its activation method. The activation method for a zinc-ion battery using vanadium pentoxide as the positive electrode material involves charging and discharging the battery at a temperature of 50-70°C. This invention performs a long-cycle rapid activation process in an oven at 50-70°C, altering the interlayer structure of vanadium pentoxide, thus expanding the interlayer spacing. This allows the vanadium pentoxide to exhibit an initial discharge specific capacity of 335 mAh / g in just two cycles at a current density of 0.2 A / g. This invention has advantages such as short reaction time, rapid capacity increase, and stable performance. When applied to the preparation of positive electrode materials for aqueous zinc-ion batteries, it can significantly improve production efficiency and material performance.

The present application relates to the technical field of mineral material microcharacterization, and in particular to a method for dispersing clay mineral monolayer suitable for transmission electron microscope observation. The method for dispersing clay mineral monolayer based on stage alcohol intercalation and exfoliation comprises the following steps: dispersing clay mineral in deionized water to obtain a clay mineral suspension system by stirring; adding small molecule alcohol to the suspension system first and then adding macromolecular alcohol, and stirring to obtain a dilute dispersion system; performing ultrasonic treatment to make the clay mineral form a dispersion system mainly in monolayer or few-layer structure; dropping onto a carrier film for transmission electron microscope to make the lamella spread on the surface of the carrier film; and observing by using a transmission electron microscope. The present application is conducive to obtaining clay mineral monolayer samples with good dispersion and complete structure, and is suitable for morphology and structure characterization under transmission electron microscope.

The application relates to the technical field of batteries, in particular to a negative electrode material, a preparation method thereof and a battery. The negative electrode material comprises a substrate and a carbon coating layer coated on at least part of the surface of the substrate; wherein the substrate comprises hard carbon, the hard carbon is a biomass-based hard carbon material, and the hard carbon contains C elements and O elements, and the atomic ratio of O and C satisfies O:C=1:20-1:10. The preparation method of the negative electrode material comprises the following steps: soaking pretreated biomass material in a chloride solution, sintering to obtain a hard carbon precursor; mixing the hard carbon precursor with an acid solution, adding peroxodisulfate, and after mixing, separating and drying, obtaining a hard carbon material containing an epoxy group; performing carbon coating treatment on the hard carbon material containing the epoxy group to form a carbon coating layer on at least part of the surface of the hard carbon, and obtaining the negative electrode material. The application can improve the capacity and kinetic performance of the negative electrode material, and improve the capacity, initial efficiency and cycle performance of the battery.

The application relates to a high-strength glass fiber modified plastic and a preparation method thereof, and belongs to the technical field of high polymer composite materials. The glass fiber modified plastic comprises the following components in parts by weight: resin 40-90 parts, modified glass fiber 10-20 parts, lubricant 0.4-3 parts and antioxidant 0.5-2 parts; the modified glass fiber comprises a glass fiber matrix, a polydopamine layer coated on the surface of the glass fiber matrix and Sr-doped ZnS nanosheet layers formed on the surface of the polydopamine layer; by constructing a polydopamine / Sr-doped ZnS nanosheet composite interface layer on the surface of the glass fiber, the interface bonding force between the glass fiber and the plastic matrix is significantly improved, meanwhile, the composite material is endowed with excellent ultraviolet aging resistance, the obtained glass fiber modified plastic has high strength and high durability, and can be widely applied in the fields of automobile industry, aerospace, electronic appliances and the like.

This invention discloses a high-temperature resistant organic clay for drilling fluids, comprising the following components by weight: 50-80 parts sodium-based montmorillonite, 10-30 parts attapulgite, 10-30 parts long-chain quaternary ammonium salt, and 5-15 parts chelating agent. This invention uses a compound of montmorillonite and attapulgite as a modifying material to prevent the single layered structure of montmorillonite from discontinuing at high temperatures, thus affecting the high-temperature resistance of the organic clay. A long-chain quaternary ammonium salt is used as a primary intercalating agent to effectively penetrate the interlayers of montmorillonite, increasing the interlayer spacing. A chelating agent is then used as a secondary intercalating agent to connect adjacent montmorillonite layers using chemical bonds. Simultaneously, the primary intercalating agent and the montmorillonite are further connected to improve the problem of easy ionic bond desorption. This results in a high-temperature resistant organic clay for drilling fluids with a high temperature resistance exceeding 200℃, exhibiting a high colloidal content and good viscosity-enhancing and shear-lifting effects at this temperature.

This invention relates to the field of advanced petrochemical new materials technology, and discloses a luminescent composite material, its preparation method, and its application. The composite material comprises the following components: homopolymer polypropylene, polybutylene succinate, a compatibility modification system, double-modified rare-earth strontium aluminate luminescent powder, dispersant, antioxidant, weathering agent, toughening agent, nucleating agent, and silane coupling agent. This invention employs a compatibility modification system composed of maleic anhydride-grafted PP-g-PBS copolymer and double-modified nano-montmorillonite. The maleic anhydride-grafted PP-g-PBS copolymer constructs a chemical link between the polypropylene and polybutylene succinate molecular chains through a grafting reaction, reducing the interfacial tension between the two resins. The double-modified nano-montmorillonite, after ionic liquid intercalation and silane grafting treatment, exhibits increased interlayer spacing and improved surface activity, uniformly dispersed in the matrix, and acts as a physical crosslinking point, improving the compatibility of the matrix resin and preventing phase separation.

This invention belongs to the field of inorganic nanoparticle preparation technology, and relates to a ball milling modification method for bifunctionalized thin-layer hexagonal boron nitride: Hexagonal boron nitride powder, guanidine hydrochloride, and urea are continuously heated and stirred to obtain a homogeneous mixture of a eutectic solvent formed by guanidine hydrochloride and urea and the hexagonal boron nitride powder; this mixture is poured into a ball mill jar containing grinding balls and a liner, and a certain amount of ethanol and water are added as dispersants for high-energy ball milling; after the material is separated from the grinding balls, the milled material is vacuum filtered, dried, and the resulting powder is dispersed in water, then ultrasonicated, allowed to stand, vacuum filtered, and dried to obtain bifunctionalized thin-layer hexagonal boron nitride. This invention not only has the advantages of readily available raw materials and simple process, but also high efficiency, environmental friendliness, and low energy consumption. The hexagonal boron nitride obtained by this method has thinner layers, good biocompatibility, low relative density, and good thermal conductivity.

This invention discloses a chloride-intercalated nickel-iron layered double hydroxide, its preparation method, and its application, belonging to the field of electrocatalytic materials technology. In this invention, chloride ions occupy the interlayer domains without disrupting the main layer structure, and the interlayer spacing is stably expanded through electrostatic interaction. The one-step hydrothermal method for preparing this material includes: immersing nickel foam in a mixed solution containing chloride salt, nickel salt, iron salt, and urea for a hydrothermal reaction, thereby obtaining an in-situ grown nanoflower-like array structure catalytic electrode. This catalytic electrode exhibits performance at 10 mA / cm² in alkaline water oxidation. ‑2 The overpotential is only 179 mV, allowing for stable operation for over 500 hours in anion exchange membrane water electrolysis devices. It also exhibits excellent electro-oxidation activity for biomass molecules such as glycerol, methanol, ethanol, and urea. This invention features a simple and low-cost preparation process, making it suitable for alkaline water electrolysis and biomass-assisted electrolysis hydrogen production.

The preparation method of the intercalated hydrotalcite / phosphate esterification modified castor oil composite fatliquoring agent disclosed by the application is implemented according to the following steps: step 1, preparing Phy-LDH; and step 2, preparing the intercalated hydrotalcite / phosphate esterification modified castor oil composite fatliquoring agent. The application also discloses the intercalated hydrotalcite / phosphate esterification modified castor oil composite fatliquoring agent and application. The application uses sodium phytate intercalated hydrotalcite to expand the interlayer spacing, weaken the interlayer electrostatic effect, reduce the tendency of the sheet layer aggregation, and improve the dispersion stability of the LDH in the castor oil. Meanwhile, the castor oil is modified by phosphate esterification, and a phosphorus-containing group is introduced into the molecule, so that the phosphate esterification modified castor oil and the sodium phytate intercalated hydrotalcite can be uniformly combined to form a stable composite system. The intercalated hydrotalcite / phosphate esterification modified castor oil composite fatliquoring agent also has the functions of softening and flame retardance.

The application discloses a kind of ammonium polyphosphate and MXene composite negative electrode material and its preparation method and application, belong to battery technical field.The composite negative electrode material provided in the application includes ammonium polyphosphate and MXene;Between the ammonium polyphosphate and the MXene is connected by hydrogen bond effect.The ammonium polyphosphate is introduced into MXene by hydrogen bond effect in the application, not only make the composite negative electrode material formed with stable hydrogen bond network structure, to expand the interlayer spacing of MXene, increase ion transmission channel, enhance structural stability, but also increase the attachment site of ion, improve the specific capacity of material.The composite negative electrode material provided in the application can be prepared to long cycle life, reversible cycle specific capacity high negative electrode and sodium ion battery.

This invention relates to the field of lithium-ion batteries, and more particularly to a negative electrode material for lithium-ion batteries and its preparation method. The invention provides a powdered carbon material with a core-shell structure. The core of this microporous carbon material is coated with a carbon material shell. The core has a particle size of 3-8 μm and contains a large number of micropores with a pore size of 0.001-0.5 nm, accounting for 60-90% of the total pore volume of the core. The remainder consists of micropores with a pore size greater than 0.5 nm-50 nm. The interlayer spacing of the 002 crystal planes constituting the core is 0.39-0.41 nm. The shell has a thickness of 10-1000 nm, preferably 10-200 nm, with a pore size of 0.001-10 nm. The interlayer spacing of the 002 crystal planes constituting the shell is 0.34-0.36 nm. The negative electrode material provided by this invention has a hard carbon structure with a large interlayer spacing, which facilitates the diffusion of lithium ions within it, enabling rapid charging and discharging within the electrode and achieving high-rate performance of the negative electrode material.