14results about How to "Improve surface structure" patented technology

The invention relates to the technical field of composite current collectors, and discloses a composite current collector. Comprising the following operation steps: S1, uniformly mixing thermal expansion microspheres and a polymer material, and performing melt extrusion and two-way stretching to obtain a current collector base film; s2, depositing a transition layer on each of the two surfaces of the current collector base film to obtain a composite collector film A; s3, depositing a metal layer on each of the two surfaces of the transition layer of the composite film A to obtain a composite film B; and S4, depositing a protective layer on each of the two surfaces of the metal layer of the composite film B to obtain the composite current collector.

The invention provides a recycling method for waste tire pyrolysis residues. The recycling method comprises the following steps: S1, firstly carrying out wire drawing on waste tires; s2, the waste tires obtained after wire drawing are put into a crushing unit to be crushed; s3, the crushed waste tires are added into a pyrolysis processor; s4, carrying out water cooling on solid slag generated by pyrolysis of the old tire to obtain a primary carbon black material; s5, mixing the black primary material and a desulfurizing agent according to the mass; s6, washing: adding the crude carbon black into a granulating agent, and washing in a washing solution; s7, granulation: conveying the carbon black slurry into a granulator through a screw conveyor, extruding, forming and discharging; and S8, drying and discharging. S9, compounding the dried and discharged carbon black with water, a water reducing agent and cement; and S10, vibrating, stirring and forming.

The present invention provides a rare earth metal modified layered positive electrode material for sodium ion batteries and a preparation method thereof. The main structure of the rare earth metal modified layered positive electrode material for sodium ion batteries is an O3 phase, and the chemical formula is NaNi a Fe b Mn c Re d O 2 , 0.28≤a≤0.33, 0.28≤b≤0.33, 0.28≤c≤0.33, 0≤d≤0.05, Re represents a rare earth metal element; the layered positive electrode material includes spherical secondary particles, the secondary particles include a plurality of stacked flaky primary particles, part of the rare earth metal elements are distributed on the surface of the secondary particles in the form of rare earth metal oxides, and part of the rare earth metal elements are doped in the layered positive electrode material lattice in the form of rare earth metal ions. The positive electrode material provided by the present invention is modified based on rare earth metal elements, and has good sphericity and rich pore structure. The battery containing the positive electrode material exhibits excellent rate performance and good cycle stability.

The invention relates to the technical field of membrane separation, in particular to a composite ultrafiltration membrane based on blending modification and surface modification and a preparation method and application thereof. The method comprises the following steps: firstly, preparing a polydopamine functionalized multi-walled carbon nanotube through oxidation cross-linking auto-polymerization and adhesion of a dopamine compound in an aqueous solution; dissolving a film-forming polymer, a pore-foaming agent and the prepared polydopamine functionalized multi-walled carbon nanotube in an organic solvent, degassing, and preparing a blend film by adopting a non-solvent induced phase separation method; the prepared blended membrane is sequentially and alternately immersed in a tannic acid solution and an aluminum salt solution, a tannic acid-aluminum ion metal phenolic aldehyde network layer is formed on the surface of the blended membrane through a coordination-driven layer-by-layer self-assembly method, and the composite ultrafiltration membrane is obtained. The composite ultrafiltration membrane prepared by the invention has high flux, high selectivity and excellent anti-pollution performance, and is especially suitable for treating and recycling wastewater containing organic macromolecules such as protein, colloid and the like.

The present invention relates to a positive electrode active material and a method for preparing the same. The method for preparing a positive electrode material of the present invention includes the steps of mixing a transition metal precursor and a lithium raw material and primarily sintering the mixture to prepare a lithium nickel-based oxide in the form of single particles or quasi-single particles, secondarily sintering the lithium nickel-based oxide in the form of single particles or quasi-single particles, and mixing the secondarily sintered lithium nickel-based oxide and a boron raw material and then heat-treating the mixture to form a coating layer.

The invention belongs to the technical field of material science and engineering, and discloses calcining equipment for preparing high-purity tantalum oxide, which comprises a workbench, a fluotantalic acid solution produced by a tantalum-niobium liquid-liquid extraction method is used as a raw material, ammonia water and ammonia gas are used for neutralizing and precipitating, and the high-purity tantalum oxide is prepared by controlling different factors such as ammonia water concentration, tantalum liquid concentration, ammonia flushing speed and neutralizing temperature. Tantalum oxide particles are produced, then the produced tantalum oxide particles are poured into the spherical shell, the calcining crucible is started, heat conduction is conducted on the tantalum oxide particles in the spherical shell through temperature rising of the calcining crucible, and therefore the tantalum oxide particles are calcined, meanwhile, the motor is driven, and the motor drives the rotating shaft and the spherical shell to rotate; in the rotating process of the spherical shell, the tantalum oxide particles can be subjected to rolling heating at the bottom of the inner wall of the spherical shell, the calcining effect on the tantalum oxide particles is improved, the tantalum oxide particles can be heated more uniformly, the conversion efficiency of the tantalum oxide particles can be increased, and the surface structure of the particles can be optimized.

This invention provides a silicon-based anode composite material, its preparation method, and its application. The silicon-based anode composite material comprises a silicon-based core, a boronoxy lattice stabilizer, and an inert material. At least a portion of the boronoxy lattice stabilizer is embedded in the lattice structure of the silicon-based core, and the inert material coats the surface of the silicon-based core. This invention helps improve the initial coulombic efficiency and cycle performance of the silicon-based anode composite material.

The invention provides a perovskite solar cell and a preparation method thereof. The method comprises the following steps: preparing a first carrier transport layer on the surface of one side of a conductive surface of a transparent conductive substrate; performing laser treatment on the surface of one side, far away from the transparent conductive substrate, of the first carrier transport layer by adopting a surface laser source to obtain a modified first carrier transport layer; the projection area of the surface laser source is 1-10000 mm < 2 >; the first carrier transport layer is a hole transport layer or an electron transport layer; and sequentially preparing a perovskite active layer, a second carrier transport layer and a metal electrode layer on the surface of one side, far away from the transparent conductive substrate, of the modified first carrier transport layer to obtain the perovskite solar cell. The first carrier transport layer is subjected to laser processing, the surface structure of the first carrier transport layer can be improved, and the modified first carrier transport layer is obtained, so that the energy level matching and the carrier mobility between the modified first carrier transport layer and the perovskite active layer are improved, and the photoelectric conversion efficiency of the perovskite solar cell is further improved.

The invention belongs to the technical field of photocatalysis, and particularly relates to a graphite-phase carbon nitride photocatalyst based on a nitrogen-defect sulfur-doped coupled S-type homojunction as well as a preparation method and application of the graphite-phase carbon nitride photocatalyst. N-defect g-C3N4 (NA-DCN) and S-doped g-C3N4 (NA-SCN) are respectively constructed through nitric acid assisted treatment, and directed migration of photon-generated carriers is realized by using an S-type homojunction interface so as to inhibit recombination; stable interface bonding is formed through component proportion optimization, and the specific surface area and the number of active sites of the material are synchronously increased. Finally, through multi-dimensional structure regulation and control, the problems that the g-C3N4 is limited in photoresponse range, fast in carrier recombination and difficult in consideration of catalytic activity and stability are synchronously solved, the photocatalytic hydrogen production performance of the g-C3N4 is remarkably enhanced, and a reliable technical scheme is provided for large-scale application of an efficient carbon nitride-based photocatalytic material.

The invention discloses a pig iron analysis sample drilling method which comprises the following steps: respectively processing an upper plane and a lower plane which are parallel to each other on the upper surface and the lower surface of a pig iron, drilling a sampling hole in the upper plane and / or the lower plane through a drill bit, taking out scrap iron, and taking the scrap iron as a component detection sample. According to the pig iron analysis sample drilling method provided by the invention, the sample preparation efficiency is improved, the sample preparation cost is reduced, and the accuracy and stability of a detection result are improved.

The invention provides a method for preparing porous ceramic through sol modified SiC particle photocuring, which comprises the following steps: forming a layer of uniform SiO2 coating on the surface of the SiC particle through sol treatment, then preparing the modified SiC particle into photocuring printing slurry, using the photocuring printing slurry to manufacture a SiC green body with a complex shape, and finally preparing the porous SiC ceramic through degreasing and sintering processes. And the SiO2 coating not only can improve the photocuring printing performance of the SiC particles, but also effectively prevents Al and SiC from directly reacting to generate a harmful phase Al4C3 in the subsequent metal infiltration process. The method is simple in process, controllable in parameter, stable and reliable, the obtained porous SiC ceramic has a continuous three-dimensional pore structure, the pore structure and the size are suitable for aluminum melt flowing and complete filling, and the porous SiC ceramic can be used for preparing a high-fraction SiC / Al composite material with a complex structure and has good application prospects. And the application of the photocuring printing technology in the fields of deep-color ceramic printing and complex-structure SiC / metal composite material manufacturing is expected to be widened.

The application discloses a preparation method and a preparation system for high-dispersion silicon dioxide for winter tires, and comprises the following steps: S1: solid sodium silicate is put into a static autoclave, steam is added to pressurize to 0.8-1.0 MPa and pressure is kept for 2 hours to obtain concentrated water glass; S2: the concentrated water glass is added with water to prepare a sodium silicate solution with a silicon dioxide content of 20-25 wt%, the sodium silicate solution is statically stored in a storage tank for more than 10 days, and then filtration is performed; and S3: sucrose fatty acid ester and concentrated sulfuric acid with a mass concentration of 98% are added into the sodium silicate solution, and the mixture is reserved after reaction. The silicon dioxide prepared by the application is specially used for winter tires, has high dispersion, uniform particles and good surface structure, can endow the winter tires with more excellent comprehensive performance, and sucrose fatty acid ester is added as a reaction regulator, so that the product has more excellent structural performance.

The utility model relates to the field of decorative stickers, and discloses an easy-to-paste decorative sticker, which comprises a surface layer and bottom paper, the surface layer is connected with the bottom paper through an adhesive, a bottom paper extending part is integrally formed at the corner of the bottom paper, a tearable extending part is connected to the corner of the surface layer through a dotted line adding process, and the bottom paper extending part is connected with the surface layer through an adhesive. The tearable extension part and the bottom paper extension part are staggered, and the bottom paper extension part integrally formed at the corner of the bottom paper provides a clear and easy-to-grasp acting point for a user. When a user tears the backing paper, the user can easily exert force and accurately control the tearing force and direction, the risk that the sticker is wrinkled or damaged due to improper tearing is greatly reduced, the operation success rate is increased, and time and resources are saved.

The invention relates to a thermoplastic polyurethane composite fabric and a preparation method thereof, in particular to the technical field of membrane composite fabrics, the thermoplastic polyurethane composite fabric comprises a base layer fabric and a TPU / FEP double-component nanofiber membrane laminated and compounded on the base layer fabric through an adhesive, the TPU / FEP two-component nanofiber membrane is prepared by taking a TPU spinning solution and an FEP spinning solution as raw materials and taking a receiving roller subjected to ultrasonic oscillation treatment as a receiving template through multi-needle mixed electrostatic spinning. The composite fabric provided by the invention has excellent tear resistance, and meanwhile, compared with a traditional TPU (Thermoplastic Polyurethane) film-coated fabric, the waterproof performance is improved.