31results about How to "Uniform nucleation" patented technology

The invention relates to the technical field of formaldehyde adsorption, in particular to a preparation method of modified activated carbon for removing formaldehyde, which comprises the following steps: S1, performing acidification pretreatment on coconut shell charcoal, and grafting the pretreated coconut shell charcoal with polyethyleneimine to obtain activated carbon loaded with polyethyleneimine; s2, carrying out dipping treatment and cyclohexanol treatment on the activated carbon loaded with polyethyleneimine to obtain functionalized activated carbon; s3, reacting the magnesium-aluminum hydrotalcite with a quaternary ammonium salt solution and a sodium benzenesulfonate solution to obtain modified hydrotalcite; reacting the modified hydrotalcite with a vinyl silane coupling agent to obtain vinyl hydrotalcite; s4, the vinyl hydrotalcite and 4-amino-3-hydrazino-5-sulfydryl-triazole are subjected to a reaction, and secondary modified hydrotalcite is obtained; and S5, dispersing the secondary modified hydrotalcite and the functionalized activated carbon in water, and adding glutaraldehyde to obtain the modified activated carbon. The modified activated carbon prepared by the preparation method disclosed by the invention realizes selective recognition, efficient adsorption and catalytic degradation of formaldehyde.

The invention discloses an efficient difunctional alkaline electrolysis water electrode which comprises a nickel net, an N deposition layer is deposited on the surface of the nickel net, and a NiFeW alloy layer is deposited on the surface of the N deposition layer. The invention further discloses a preparation method of the electrolyzed water electrode. The preparation method comprises the following steps: pre-treating the nickel net substrate; dissolving a nickel salt, a conductive salt and an additive in water to obtain a nickel electrodeposition solution; dissolving a nickel salt, an iron salt, a tungsten salt and an additive in water to obtain a nickel-iron-tungsten electro-deposition solution; and then the nickel net substrate is placed in a nickel electrodeposition solution to be subjected to constant-current deposition, a first electrode of an N deposition layer loaded on the nickel net substrate is obtained, the first electrode is placed in a nickel-iron-tungsten electrodeposition solution to be subjected to constant-current deposition, an N < iFeW > alloy layer loaded on the N deposition layer is obtained, and a finished electrode is obtained. The method has the advantages of low hydrogen evolution overpotential, low oxygen evolution overpotential, good stability, short-time deposition at room temperature, simplicity, easiness in control and low cost, and can be expanded to actual industrial application.

The invention discloses a carbon quantum dot material as well as a preparation method and application thereof, and particularly relates to the field of battery materials. Comprising the following steps: placing terephthalaldehyde and p-trifluoromethyl cyanophenyl acetonitrile in a sodium methoxide solution for hydrothermal reaction to obtain a carbon quantum dot material; mixing PAN powder with DMF (Dimethyl Formamide) to obtain a PAN spinning solution; dispersing the carbon quantum dot material in the PAN spinning solution to obtain a mixed spinning solution; and spinning the mixed spinning liquid on the surface of the zinc foil in an electrostatic spinning manner to obtain the modified zinc foil. The carbon quantum dot material rich in various types of zinc-philic functional groups is synthesized through a hydrothermal method strategy, the surface electric field distribution of zinc metal can be improved, then the zinc ion deposition and nucleation process is homogenized, zinc dendrite formation is avoided, the modified zinc foil serves as the negative electrode material of the water-based zinc ion battery, and the service life of the water-based zinc ion battery is prolonged. The carbon quantum dot material with rich electronegative functional groups can repel sulfate ions in the electrolyte, so that the formation of byproducts is inhibited.

The invention relates to a preparation method of a negative electrode material for greatly exposing (101) crystal faces of a traditional commercial zinc foil by adopting a citric acid etching reaction and application of the negative electrode material in water-based zinc ion battery negative electrode protection. And the crystal faces (100) and (002) are etched off by using citric acid, and a large amount of the negative electrode material of the crystal face (101) is exposed. When applied to a negative electrode of a water-based zinc ion battery, the negative electrode material can improve the migration and nucleation capabilities of zinc ions in the negative electrode, can accelerate the dynamic process of rapid and uniform deposition of the zinc ions, and also can improve the stability of the battery. The stability and the dynamic performance of the negative electrode can be greatly improved, zinc ions can achieve rapid migration and uniform deposition on the surface of the negative electrode, and a good inhibition effect on hydrogen evolution and corrosion behaviors is achieved. Research finds that a layer of ZnS solid electrolyte membrane (SEI) protection layer is formed on the surface of the highly exposed Zn (100) negative electrode in the circulation process to prevent direct contact between an exposed crystal face and electrolyte, so that side reactions such as water decomposition and the like are inhibited, interface free energy is reduced, transfer kinetics of zinc ions is promoted, and the service life of the negative electrode is prolonged. And nucleation and deposition of uniform zinc ions are facilitated. The method for protecting the negative electrode of the aqueous zinc ion battery is simple and safe to operate, shows excellent reversibility, and can stabilize the output of the battery in a whole battery in practical application, and the method for protecting the negative electrode of the aqueous zinc ion battery is provided.

The invention belongs to the technical field of lithium metal batteries, and discloses a laser modified composite lithium metal battery negative electrode material and a preparation method thereof.The preparation method comprises the steps that various weighed chloride salts are mixed in ethyl alcohol respectively, and an ethyl alcohol precursor solution with the metal element concentration being 0.01 mol / L is finally obtained through mixing; the foamy copper is subjected to ultrasonic cleaning with acetone, absolute ethyl alcohol and ultrapure water in sequence and is subjected to vacuum drying for 4-8 h at the room temperature for standby application; the prepared precursor solution is directly dropped into foamy copper with the loading capacity of 1-2 mL / cm <-2 >, and then the foamy copper is transferred into a vacuum oven and dried for 8-12 h at the room temperature; and carrying out liquid-phase laser scanning ablation on the dried foamy copper precursor to prepare the L-CF (at) HEAs sample. The liquid-phase laser technology is adopted for laser irradiation, the method is simple and good in repeatable operability, a large amount of time can be saved, the manufacturing efficiency of the lithium metal battery is improved, and the method plays an important role in promoting the development of the lithium metal battery.

The invention belongs to the field of negative-electrode-free battery systems, and particularly relates to a negative-electrode-free sodium metal battery, a modified diaphragm of the negative-electrode-free sodium metal battery, and preparation and application of the modified diaphragm. The modified diaphragm is composed of a base diaphragm and a binder-free modified layer compounded on the surface of the base diaphragm by adopting a sputtering method, the modified layer comprises at least one nanometer material selected from titanium nitride, zinc nitride and gallium nitride. According to the invention, a modified layer formed by compounding the nanometer material without a binder is innovatively compounded on the base film, and based on the combined control of the structure and the type of the nanometer material, the synergism can be realized, the conduction of sodium ions can be effectively induced, and in addition, the nucleation and deposition uniformity of sodium metal can be improved. The research also shows that when the modified diaphragm is innovatively applied to a negative-electrode-free sodium metal battery system, the nucleation and growth behaviors of sodium can be improved, and excellent long cycle stability can be obtained.

The invention discloses a method and system for preparing nano barium sulfate uniform particles based on ultrasonic assistance, and the method comprises the steps: conveying a sodium sulfate solution and a barium chloride solution into a reaction container in an isopyknic manner, adjusting the position and parameters of an ultrasonic transducer, and adjusting the power and frequency according to a preset curve; slowly transferring the slurry obtained by the reaction into a post-treatment container, adding a sodium hexametaphosphate solution, and carrying out dispersion treatment in an ultrasonic cleaning device; and subpackaging the product into a sealed container subjected to cleaning treatment in a continuous flowing manner, controlling the filling amount, and sealing for constant-temperature storage. According to the scheme of the invention, nano barium sulfate particles with small particle size and uniform distribution can be generated.

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 invention discloses a light-weight anti-radiation metal nano material for an SAR load and a preparation method of the light-weight anti-radiation metal nano material, and relates to the technical field of metallurgy. The preparation method comprises the following steps: firstly, adding a filler formed by compounding graphene and silicon dioxide into a metal material, reacting titanium dioxide with an aluminum base during high-temperature calcination to deoxidize to generate a silicon semiconductor, and forming a doped structure with graphene. Nanometer TiC-TiB2 particles are introduced into molten steel through aluminum-based intermediate alloy, in the solid-state phase change process, fine primary austenite, increased grain boundaries and nanometer particles can provide more nucleation sites for ferrite and cementite to be combined with graphene and silicon semiconductors, as-cast and annealed structures are further refined, and the density of metal is reduced. And then the nano-particles in the carbon steel are strengthened by using an ultra-fast cooling technology, so that the nano-scale cementite particles are dispersed more uniformly in the whole structure. The metal nano material prepared by the method has the effects of light weight and radiation resistance.

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 belongs to the technical field of conductive materials, and particularly relates to silver-coated copper powder based on copper powder pretreatment and a preparation method thereof. The preparation method is characterized in that the method comprises the following steps: (1) after the copper powder is laid flat, the copper powder is placed in a tube furnace, heated to a target temperature, air is introduced, heat preservation is performed, and cooling to room temperature is performed to complete the oxidation treatment of the copper powder; (2) a reducing agent, a complexing agent, a dispersing agent, a brightener and deionized water are stirred and mixed uniformly to prepare a reducing solution; then the copper powder after the oxidation treatment is added to the reducing solution, and continuous stirring is performed to obtain a copper powder-containing reducing solution; (3) silver nitrate solution is added to the copper powder-containing reducing solution, temperature is maintained, stirring is performed, and separation, washing and drying are performed to obtain the silver-coated copper powder based on the copper powder pretreatment. The silver-coated copper powder prepared by the application has good coating effect, so that the silver shell is uniformly distributed on the surface of the copper powder in the nucleation stage, thereby ensuring the uniform and dense coating of the silver shell.

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 sodium-sulfur batteries, and particularly relates to a flexible sodium-sulfur battery and a preparation method thereof, and the preparation method comprises the following steps: (1) cleaning, drying, heating and activating conductive carbon cloth; (2) dissolving Ni (NO3) 26H2O, Co (NO3) 26H2O, Na2MoO4, urea and NH4F to obtain a mixed solution, immersing the activated conductive carbon cloth into the mixed solution for hydrothermal reaction to obtain a precursor-loaded carbon cloth electrode, ultrasonically cleaning and drying the precursor-loaded carbon cloth electrode, and performing hydrothermal vulcanization on the obtained NiCoMoLDHs (at) CC skeleton in a Na2S9H2O aqueous solution; and (3) enabling the NiCoMoLDHs (at) CC skeleton to be in contact with heated and molten metal sodium, and carrying out spontaneous adsorption along with molten sodium. The lithium ion battery provided by the invention has better reversibility and more stable cycle performance, and can maintain a relatively high capacity retention rate during long-time cycle use.

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 invention provides an all-solid-state lithium metal battery interface protection layer and a preparation method and application thereof, and belongs to the technical field of negative electrode materials in all-solid-state battery systems, and the interface protection layer is of a single-layer structure or a multi-layer structure; the single-layer structure is composed of Li6PS5Cl and conductive carbon, and the mass ratio of the Li6PS5Cl to the conductive carbon is any one of 99.5: 0.5, 99: 1, 97: 3 and 95: 5; or the single-layer structure is composed of Li6PS5Cl and a lithium-loving element M, and the mass ratio of the Li6PS5Cl to the lithium-loving element M is 75: 25; the multi-layer structure is formed by stacking a plurality of interface layers, each interface layer is composed of Li6PS5Cl and conductive carbon, and the mass ratio of the Li6PS5Cl to the conductive carbon is any one of 99.5: 0.5, 99: 1, 97: 3 and 95: 5; and in the plurality of interface layers, the content of the conductive carbon is gradually increased layer by layer. The interface protection layer has gradient conductivity, so that uniform deposition of lithium is effectively induced while ion and electron transmission in the all-solid-state lithium metal battery is ensured, and the cycling stability and safety of the all-solid-state lithium metal battery are further improved.

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 present invention relates to an efficient homogenization heat treatment method for a Zr-containing aluminum-lithium alloy, and belongs to the technical field of heat treatment of aluminum-lithium alloys. The method comprises: (1) a first-stage homogenization treatment: the alloy adopts a homogenization heating process with a gradually decreasing heating rate to realize the nucleation of the dispersed phase; the alloy is kept warm at a relatively high temperature and a narrow temperature window to ensure the uniform growth of the dispersed phase while realizing the dissolution of the Ag-containing phase. (2) a second-stage homogenization treatment: the temperature is rapidly increased and then kept warm to realize the rapid dissolution of the Cu-rich phase within a relatively high temperature window. The homogenization treatment method of the present invention realizes uniform precipitation of the dispersed phase, good dissolution of the Ag-containing phase and the Cu-rich phase, so that the ingot obtains an ideal structure and improves the efficiency of the homogenization heat treatment.

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 present invention relates to a protective layer-modified zinc negative electrode material and a preparation method and application thereof. The zinc negative electrode material is a zinc-containing metal substrate coated with a protective layer, and the preparation method has the following steps: 1) adding a zwitterionic substance, a hydrophilic monomer, and an oxidant to a solvent, and stirring evenly at room temperature to obtain a slurry; 2) adding a catalyst to the slurry, stirring evenly to obtain a precursor liquid, exhausting the precursor liquid and evenly coating it on the zinc-containing metal substrate, and then leaving it at room temperature. After the precursor liquid polymerizes on the zinc-containing metal substrate, the obtained sample is vacuum dried to obtain a protective layer-modified zinc negative electrode material. The surface of the zinc negative electrode material provided by the present invention is modified with a functional zwitterionic interface layer, and the modified interface can guide the zinc ions to be evenly distributed on the surface of the metal zinc, and accelerate the Zn 2+ Diffusion of Zn 2+ Uniform nucleation and efficient deposition give zinc negative electrode materials good cycle stability and rate performance, long service life and greater safety.

The invention provides a polymer solid electrolyte and a solid sodium battery based on the polymer solid electrolyte. The electrolyte is prepared from sodium salt, an antimony-based additive and a high-molecular polymer. The polymer solid electrolyte provided by the invention has relatively high ionic conductivity, has relatively strong interface compatibility with sodium metal, can effectively inhibit interface side reaction and sodium dendrite growth, is simple in preparation process, and is expected to be applied to industrial production; the polymer solid electrolyte disclosed by the invention is applied to a sodium metal symmetric battery and a sodium vanadium phosphate sodium (Na3V2 (PO4) 3) total battery, and the battery shows low polarization voltage, stable cycle performance and relatively high specific capacity and has a very good practical application value.

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.