17results about How to "Uniform nucleation" patented technology

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

The invention belongs to the technical field of advanced powder material preparation, and particularly relates to a micron-sized metal powder preparation system which comprises a raw material system, a gas supply system and an atomization tower. The atomizing tower comprises an atomizing chamber, a liquid drop collector is arranged at the bottom end of the atomizing chamber, and a reaction kettle is arranged below the liquid drop collector; a micro-mixer and an atomizing device are arranged in the atomizing chamber, the micro-mixer comprises a sol generating unit and a liquid drop generating unit, an inlet of the sol generating unit is connected with a raw material system, an outlet of the sol generating unit is connected with an inlet of the liquid drop generating unit, and an outlet of the liquid drop generating unit is connected with an outlet of the atomizing device. An outlet of the liquid drop generation unit is connected with an inlet of the atomization device, the liquid drop generation unit is further provided with a first gas inlet, and the first gas inlet is connected with a gas supply system. The preparation system provided by the invention realizes accurate control of powder components, morphology and size, and has the advantages of low cost, uniform size, continuous production and the like.

The application discloses a diamond-based boron nitride film and a preparation method thereof, and relates to the technical field of semiconductor epitaxial materials. The preparation method comprises the following steps: sequentially polishing and cleaning and pretreating a single crystal diamond substrate; performing glow discharge cleaning treatment on a cavity, and increasing the temperature in the cavity to a growth temperature; performing glow discharge activation treatment on the surface of the pretreated single crystal diamond substrate; performing auxiliary glow discharge activation treatment on the surface of the single crystal diamond substrate after the glow discharge activation treatment; growing a boron nitride film on the surface of the single crystal diamond substrate after the surface treatment; reducing the growth temperature to room temperature to obtain a diamond-based boron nitride film after the temperature reduction treatment; and performing annealing treatment on the diamond-based boron nitride film after the temperature reduction treatment to obtain a finally prepared diamond-based boron nitride film. The method can simultaneously meet the key requirements of low damage, high nucleation activity and controllable stress release of the interface.

This invention relates to the field of batteries, and more particularly to a positive electrode material, a method for preparing the same, and a battery. The positive electrode material includes a core and a coating layer covering at least a portion of the surface of the core; the core has the general chemical formula Na3V. 1.925 M 0.075 (PO4)3, where M is a transition metal element; the coating layer includes carbon materials, which include nitrogen-doped amorphous carbon and carbon nanotubes introduced by acidified carbon nanotubes. The cathode material provided by this invention can significantly improve the low-temperature, high-rate, and long-cycle electrochemical performance. Thanks to the synergistic effect of structural optimization and interface regulation, the polarization of the material is significantly reduced under low-temperature and high-current charge-discharge conditions, and the rate performance and cycle stability are significantly improved, enhancing the practicality and reliability of sodium-ion batteries in large-scale energy storage and wide-temperature applications.

The invention discloses a high-silicon-content water-based silicone-acrylic emulsion and a preparation method thereof, and relates to the technical field of silicone-acrylic emulsions.According to the high-silicon-content water-based silicone-acrylic emulsion and the preparation method thereof, uniform nucleation and growth of nano-silica in a polymer network are achieved through synchronous implementation of monomer polymerization and nano-silica generation, and the total silicon content in the silicone-acrylic emulsion is higher than 30%; the in-situ synchronous hydrolysis-polymerization process adopted in the invention greatly simplifies the production process, improves the reaction efficiency, and makes the compatibility of an inorganic phase and an organic phase better, thereby endowing the adhesive film with excellent mechanical properties, water resistance, thermal stability, storage stability and the like.

This invention provides a method for preparing high bulk density potassium peroxymonosulfate composite salt. Through multi-dimensional process optimization including multi-point feeding and neutralization, ultrasonic action, crystal guiding agent, heating-heating-heating-cooling, and drying-mixing-sieving, the bulk density of PMS is synergistically improved, and the overall performance of the final product is superior to that of the prior art.

The invention relates to a trans-solar cell module based on a 1-allyl-3-methylimidazolium hexafluorophosphate perovskite additive and a preparation method of the trans-solar cell module, and relates to the field of solar cells. The perovskite solar module structure sequentially comprises transparent conductive glass, a hole transport layer, a perovskite layer, an electron transport layer and a back electrode layer from bottom to top. An additive with a certain concentration is added into the perovskite layer, the additive is 1-allyl-3-methylimidazolium hexafluorophosphate, and the concentration of the additive is 0.2 mg / ml to 2.0 mg / ml. The crystallization process of the large-area perovskite thin film is optimized through the 1-allyl-3-methylimidazolium hexafluorophosphate additive, the defect concentration of the thin film is reduced, and the performance of the perovskite photovoltaic module is improved.

The invention discloses a composite additive for a zinc ion battery electrolyte, the zinc ion battery electrolyte as well as a preparation method and application of the zinc ion battery electrolyte. The composite additive comprises a carbon nano tube and an anionic surfactant, and the carbon nano tube and the anionic surfactant can generate micelle action to form nano micelle particles. The zinc ion battery electrolyte comprises zinc ions and the composite additive for the zinc ion battery electrolyte. The composite additive disclosed by the invention has multiple functions, and can finally realize multifunctionality of inducing uniform nucleation of zinc at an interface and retarding dendritic crystals and various side reactions through multiple mechanisms such as regulation and control of an H bond network of water molecules, improvement of a hydrated zinc ion solvation structure, generation of a shielding layer after adsorption on the surface of a negative electrode, regulation and control of an electric field and the like. The zinc ion battery electrolyte realizes dendrite-free stable circulation of a zinc negative electrode in a symmetrical battery assembled by using the zinc ion battery electrolyte under various current densities and surface capacities, and the cycle life of the negative electrode is greatly prolonged.

The application discloses a composite positive electrode sheet and a preparation method and application thereof. The positive electrode sheet comprises a current collector and a positive electrode layer coated thereon. The positive electrode layer comprises a specific mass ratio of composite sodium iron phosphate and O3 phase layered oxide as active materials. The two are improved in compaction density through bimodal particle size grading and rigid and flexible particle network, and sodium methyl borate is used as a surface coating layer. The preparation method is that, under the protection of argon, sodium methyl borate is solid-phase coated on the surface of mixed active materials through mechanical force, and then the sodium methyl borate is dispersed into slurry together with additives, conductive agents and binders, and the slurry is coated, dried and rolled to form the positive electrode sheet. The composite positive electrode sheet realizes dense packing by using the particle size difference of the two active materials, improves the interface stability by combining the sodium methyl borate coating layer, and adds lithium iron phosphate to improve the conductivity and structural stability, so that the capacity, rate performance and cycle life of the sodium ion battery are effectively improved. The application further provides a sodium ion battery comprising the positive electrode sheet.

This invention discloses a lithium-sulfur battery binder, its preparation method, and its application, belonging to the field of lithium-ion battery technology. The binder is prepared by grafting polyvinyl alcohol (PVA) with 3-(3,4-dihydroxyphenyl)-DL-alanine (DOPA) onto the PVA molecular chain, with a molar ratio of (0.9~1.2):(0.2~1). This invention, through directional molecular structure design of the binder, simultaneously achieves rapid lithium-ion conduction, improved electrochemical reaction kinetics, and optimized electrode mechanical structure stability, solving the industry problem of traditional lithium-sulfur battery binders' single-performance limitations and inability to meet multiple electrode requirements. The preparation method employs a controllable grafting reaction to functionalize the binder's polymer backbone, introducing sufficient polar functional groups and lithium-ion conduction active sites onto the molecular chain. This balances the stability of the polymer chain's cross-linking structure with electrode interface affinity, synergistically improving interfacial ion transport efficiency. The binder provided by this invention has broad application prospects in lithium-sulfur batteries.

The invention belongs to the technical field of single crystal materials, and particularly relates to a SrxBi2Se3 topological superconducting single crystal material and a space preparation method and application thereof. The size of the SrxBi2Se3 topological superconducting single crystal material is larger than or equal to 10 mm * 8 mm * 0.5 mm, the superconducting transition temperature of the SrxBi2Se3 topological superconducting single crystal material is larger than or equal to 3 K, and the doping amount of Sr in the SrxBi2Se3 topological superconducting single crystal material is larger than or equal to 70% of the actual using amount of Sr. Wherein x is more than 0 and less than or equal to 0.3. The preparation method of the SrxBi2Se3 topological superconducting single crystal material has the beneficial effects that the SrxBi2Se3 topological superconducting single crystal material is prepared in a microgravity environment, ideal conditions without convection and sedimentation are provided, solute segregation can be effectively inhibited, uniform nucleation and growth are promoted, and proper conditions are provided for growth of Sr-doped Bi2Se3 single crystals. The microgravity environment is based on a space station experiment platform, and efficient and high-quality space preparation of the SrxBi2Se3 single crystal is achieved.

The present application relates to the technical field of electrode material, and particularly relates to a preparation method of seamless integrated zinc negative electrode material.In the present application, a three-dimensional porous structure vertical graphene is constructed on the surface of a substrate, and the surface of the vertical graphene is functionally treated to serve as a zinc plating framework, so that zinc is uniformly loaded on the surface of the substrate, and then a MOF protective layer is coated on the surface of the vertical graphene, thereby obtaining the seamless integrated zinc negative electrode material.In the present application, the surface functional treatment introduces hydrophilic functional groups to the surface of the vertical graphene to enhance the interaction and uniform electric field distribution;the introduction of the MOF protective layer does not destroy the surface morphology, and the thin and uniform MOF protective layer can also exclude large-size charged ion complexes.

The application belongs to the technical field of luminescent materials, and particularly relates to a preparation method of pure green light fluorine-doped perovskite quantum dot solution. Formamidinium bromide solution, PbBr2 solution, a ligand and a light coupling agent are uniformly mixed to obtain a precursor solution; the precursor solution is added into an anti-solvent, stirred and reacted, a terminating agent is added to terminate the reaction, centrifugal separation is carried out, a solid is obtained, a solvent is added into the solid and uniformly mixed, centrifugal separation is carried out, filtration is carried out, and a colloidal solution is obtained; a fluorine dopant is added into the colloidal solution to react, reaction is carried out under ultraviolet light irradiation, centrifugal separation is carried out, a solid is obtained, a solvent is added into the solid and uniformly mixed, and the pure green light fluorine-doped perovskite quantum dot solution is obtained. In the application, the light coupling agent and the fluorine ion synergistically act, the prepared pure green light fluorine-doped perovskite quantum dot solution has excellent thermal stability, can realize green light emission in the range of 525-535 nm, has great commercial application potential, the preparation method is simple and easy to operate, the process is stable, and the process flow is controllable.

The invention discloses a supported nickel catalyst for preparing 1, 3-propylene glycol by hydrogenation of a 3-hydroxypropionaldehyde fixed bed, and a preparation method and application thereof, and relates to the technical field of catalysts. The catalyst provided by the invention takes a carrier with a large specific surface area and a large aperture as a matrix, and an active component nickel is uniformly loaded to the surface of the carrier in a highly dispersed manner by adopting a precipitation-deposition method; in the catalyst forming stage, a neutral or alkaline binder is selected, so that a pre-roasting step of a precipitation product is avoided, and the finally prepared catalyst not only has higher hydrogenation activity, but also has a certain cost advantage. The supported nickel catalyst prepared by the invention has high catalytic activity and selectivity in the process of preparing 1, 3-propylene glycol by hydrogenation of a 3-hydroxypropionaldehyde fixed bed, and is suitable for industrial continuous production of 1, 3-propylene glycol.

The invention discloses a preparation method of a metal negative electrode material of a sodium secondary battery and the sodium secondary battery. The preparation method comprises the following steps: S1, carrying out heteroatom surface modification treatment on a pure-phase continuous carbon nanotube film; s2, preparing a sodium-containing molten liquid; s3, dipping the carbon nanotube film subjected to surface modification treatment in the step S1 into a sodium-containing melt liquid; and S4, rolling the carbon nanotube film impregnated in the step S3, coating and rolling to obtain the ultra-thin sodium metal negative electrode coiled material, so that the energy density and the safety of the battery can be remarkably improved, and the cycle life of the battery can be remarkably prolonged.

This invention relates to the field of fuel cell catalytic materials technology, specifically to a Pt anti-reverse electrode catalyst supported on molybdenum-ruthenium oxide for fuel cell anodes and its preparation method. The catalyst uses molybdenum-ruthenium oxide with a loose, porous structure as a support, and highly dispersed Pt nanoparticles as the active component, wherein Ru (Ru) serves as the active site for the oxygen evolution reaction (OER) under reverse electrode conditions. The method first utilizes a glucose blowing method and urea pyrolysis process to prepare a nitrogen-doped molybdenum-ruthenium oxide support through two-stage heat treatment under an oxidizing atmosphere. Subsequently, Pt nanoparticles are uniformly loaded onto the support surface using a polyol reduction method under an alkaline environment and an inert atmosphere. This invention utilizes the unique support structure and the OER activity of Ru to efficiently catalyze the OER reaction during anode reverse electrode conditions, suppressing excessive anode potential rise, thereby avoiding carbon support corrosion, protecting the integrity of the catalyst layer structure, and improving the durability and service life of proton exchange membrane fuel cells.

The present application belongs to the technical field of flame-retardant materials, and particularly relates to a prismatic aluminum hypophosphite compound, a preparation method and application thereof. The prismatic aluminum hypophosphite compound comprises aluminum hypophosphite, layered montmorillonite and nano-silicon dioxide, wherein the weight percentage of the layered montmorillonite is 0.043-0.087 wt% and the weight percentage of the nano-silicon dioxide is 0.0036-0.0181 wt% based on 100% of the weight of the aluminum hypophosphite; the D10 particle size of the prismatic aluminum hypophosphite compound is 1-3 microns, the D50 particle size is 5-8 microns, the D90 particle size is 10-15 microns, and the D97 particle size is less than 20 microns; and the prismatic aluminum hypophosphite compound has a single prismatic crystal structure or a regular structure in which multiple prismatic crystals are embedded with each other. The prismatic aluminum hypophosphite compound has a specific morphology and is particularly suitable for a polyurethane flame-retardant system.