9results about How to "Good batch stability" patented technology

The application discloses a high-thermal-stability high-nickel ternary material, a preparation method and application. The application utilizes the characteristic that the high-nickel ternary material is sensitive to water, reconstructs a layer of NiOOH on the surface of the high-nickel ternary material, changes the NiOOH coating layer into various transition metal oxyhydroxides by means of an ion exchange reaction, constructs a layer of phosphide on the surface of the transition metal oxyhydroxide through a phosphorization reaction, finally, decomposes the various transition metal oxyhydroxides into high-entropy oxides by means of high-temperature calcination, and then obtains a high-nickel ternary material coated with double layers; the high-entropy oxides have high thermal stability and lithium ion conductivity. In-situ construction of the high-entropy oxide coating layer can not only improve the thermal stability of the high-nickel material, but also help to improve the rate performance and cycle performance of the high-nickel ternary material. The phosphide has strong conductivity, and in-situ coating of the phosphide on the surface of the high-entropy oxide can form a complementary advantage with the high-entropy oxide, and further improve the rate performance of the high-nickel ternary material.

The invention provides a hollow nano silicon-carbon composite material, a preparation method thereof and a lithium ion battery, and belongs to the technical field of lithium ion batteries. According to the preparation method disclosed by the embodiment of the invention, the hollow nano silicon-carbon composite material is prepared by adopting a sacrificial template method, the surface of a silicon nanowire is coated with a template layer through the step S1, then the template layer is coated with a high-molecular polymer through the step S2, and then the high-molecular polymer is subjected to high-temperature carbonization through the step S3 to obtain a carbon coating layer, so that the hollow nano silicon-carbon composite material is obtained. And after the template layer is etched through the step S4, a gap layer is formed between the silicon nanowire and the carbon coating layer, and the hollow nano silicon-carbon composite material can be obtained. The gap layer can provide a space for volume expansion of the silicon nanowires, and the carbon coating layer can improve the conductivity of the composite material, so that the purpose of improving the cycle performance and the conductivity of the battery is achieved.

The invention provides a sulfide-halide composite solid electrolyte, a preparation method thereof and a solid-state battery. The method comprises the following steps: mixing and ball-milling a sulfide electrolyte, a halide electrolyte, a dopant and an interface modifier under the protection of inert gas to obtain composite electrolyte powder; carrying out tabletting molding on the composite electrolyte powder under the protection of inert gas to obtain a composite solid electrolyte sheet; and carrying out annealing treatment on the composite solid electrolyte sheet under the protection of inert gas to obtain the sulfide-halide composite solid electrolyte. The sulfide-halide composite solid electrolyte disclosed by the invention can realize synergistic improvement of various properties, has high room-temperature ionic conductivity and a wide electrochemical stability window, is improved in air stability and is good in mechanical property.

This utility model discloses a novel submersible motor upper seat structure for wells, including a motor upper seat with an oil chamber and a bearing chamber inside. A mechanical seal chamber is located above the bearing chamber for installing the mechanical seal. The oil chamber and the mechanical seal chamber are connected by a slot. Positioning holes are evenly distributed along the circumference of the side of the motor upper seat, with the positioning holes positioned higher than the highest point of the oil chamber, and the highest point of the mechanical seal chamber higher than the oil chamber. This utility model modifies the positional relationship between the oil chamber, the mechanical seal chamber, and the positioning holes, reducing quality risks in casting and machining, improving product quality and production efficiency; it increases oil saturation, completing oil injection in one step, significantly saving labor costs; the upper seat is made of hard-anodized aluminum alloy, which has low cutting resistance, is easy to machine, causes less tool wear, is less prone to corrosion, has minimal impact on the appearance of the electric pump, and has a cost similar to that of gray cast iron upper seats. Aluminum alloy is lightweight, reducing transportation and assembly costs, and has good thermal conductivity, which can lower the temperature of the motor during operation.

This invention discloses a high specific surface area mesoporous tin oxide powder and its preparation method. The method includes: dissolving a tin source in a mixed solvent of alcohol and deionized water, adding a ketone complexing agent and a nonionic dispersant, and stirring to form a tin-based complex precursor solution; then transferring the solution to a hydrothermal reactor for hydrothermal aging treatment, causing the precursor solution to hydrolyze and condense, forming gel particles in situ; after solid-liquid separation, washing with alternating anhydrous ethanol and dilute ammonia water, and drying to obtain the precursor powder; finally, performing staged heating calcination under an air-nitrogen mixed atmosphere, first removing organic components at low temperature, and then completing the crystal phase transformation at high temperature to obtain rutile phase SnO2 powder. The powder has an average particle size of 8–15 nm and a specific surface area of ​​85–110 m² / g. 2 The powder has a pergola size of 3–6 nm and good dispersibility. This invention effectively suppresses grain agglomeration through complexation regulation, hydrothermal-sol-gel coupling, and gradient atmosphere calcination. The prepared powder is suitable for applications such as gas sensors, lithium-ion battery anodes, or transparent conductive films.

The application provides a modified PCR ABS material for table tennis shells and a preparation method thereof, which comprises the following components in parts by mass: low-flow PCR ABS resin: 30-40 parts, high-flow PCR ABS resin: 20-30 parts, large-particle-size ABS rubber powder: 10-15 parts, small-particle-size ABS rubber powder: 3-5 parts, SAN blend: 8-15 parts, and ABS new material: 0-20 parts; the low-flow PCR ABS resin has a melt index of 10-15 g / 10 min (220 DEG C x 10 kg); the high-flow PCR ABS resin has a melt index of 20-25 g / 10 min (220 DEG C x 10 kg); the large-particle-size ABS rubber powder has a particle size of 350-400 nm; and the small-particle-size ABS rubber powder has a particle size of 50-150 nm.

The present application provides a kind of polypeptide sustained-release hydrogel coating for preventing catheter urinary tract infection and its preparation method, the coating includes the adhesive bottom layer attached to the surface of catheter substrate, and the polypeptide sustained-release hydrogel functional layer compounded outside the adhesive bottom layer;The functional layer includes hydrophilic hydrogel gel-forming matrix, targeted antibacterial polypeptide, polypeptide sustained-release carrier and biocompatible auxiliary agent.The present application solves the interface bonding problem of hydrophobic catheter substrate and hydrophilic hydrogel through the adhesive bottom layer, the coating has strong adhesion, is resistant to urine immersion and rubbing;Through polypeptide sustained-release carrier, antibacterial polypeptide is released for 30 days, and there is no risk of burst release;The targeted antibacterial polypeptide used is specific to urinary tract infection pathogenic bacteria, has no drug resistance induction risk, has excellent biocompatibility, can effectively prevent catheter-related urinary tract infection caused by short-term and long-term indwelling catheter, the preparation process is simple and controllable, is suitable for large-scale production, and can be widely applied to antibacterial modification of urinary intervention medical devices.

The invention provides a titanium composite catalyst and a preparation method and application thereof.The titanium composite catalyst comprises a modified catalyst solution A and a modified catalyst solution B. The modified catalyst solution A comprises a coordination complex formed by an organic titanium compound and a ligand C, the modified catalyst solution B comprises a coordination complex formed by an organic titanium compound and a ligand D, the ligand C is an alcohol amine compound, and the ligand D is a polyhydroxy alcohol compound. The titanium composite catalyst is used for synthesizing the high-viscosity polyether ester elastomer, a segmented catalysis mode is adopted, the modified catalyst solution A is used for catalyzing the reaction in the esterification stage, and the modified catalyst solution B is used for catalyzing the reaction in the polycondensation stage, so that catalyst hydrolysis is avoided in the esterification stage, and high activity is provided in the polycondensation stage; and finally, synthesizing the high-viscosity polyether ester elastomer within a relatively short synthesis time.

This invention relates to the field of plant extract preparation technology, and particularly to a low-oxalic acid, high-activity fresh purslane extract, its preparation method, and its applications. This invention uses freshly harvested purslane as raw material. Except for washing, the entire process of pulverization, enzymatic hydrolysis, filtration, and concentration does not require additional process water, directly producing a raw homogenate. After acidification, enzymatic hydrolysis with compound enzymes, enzyme inactivation, filtration, pressing, and oxalic acid removal, the extract is obtained through low-temperature vacuum oxygen-free concentration. This invention requires no organic solvents and can efficiently retain the total flavonoids, total polysaccharides, and phenolic acid active ingredients. The resulting extract contains ≥1.0% total flavonoids, ≥5.0% total polysaccharides, ≥30% solids, and ≤0.05% oxalic acid. This invention solves the problems of activity loss, dilution with added water, oxalic acid irritation, large oxidation losses, and unstable industrialization associated with traditional processes. The process is gentle and can be automated for mass production, making it suitable for cosmetics, personal care products, food, and functional foods.