33results about How to "Act as a buffer layer" patented technology

The invention discloses a core-shell-structured silicon carbon negative electrode material and a preparation method therefor. The silicon carbon negative electrode material comprise a core, a buffer layer and a shell from inside to outside in sequence; the core material consists of SiO, Si, SiO<2> and silicate; the buffer layer material comprises carbon dots or graphene quantum dots; and the shellmaterial is a hard carbon material. The core material disclosed in the invention comprises a modified SiO material; through a high-temperature reaction between SiO and NaOH, nanometer silicon and sodium silicate are generated, so that the shortcoming of low initial coulombic efficiency caused by a reaction between SiO and Li in the initial charging process can be solved; meanwhile, by taking thegenerated sodium silicate as a buffer medium, volume change of the material in the lithium de-intercalation process can be suppressed effectively, and cycle performance of the electrode can be improved; and by taking conductive carbon as a coating layer and by introducing the carbon dots or graphene quantum dots, the material conductivity is improved and a buffer effect can be played, thereby realizing stable cycle performance and high reversible capacity of the battery.

The invention provides a shell which comprises a magnesium or magnesium alloy matrix, an anticorrosion layer formed on the surface of the magnesium or magnesium alloy matrix and a color layer formed on the surface of the anticorrosion layer, wherein, the anticorrosion layer comprises a magnesium layer and a magnesium nitride layer, which are sequentially formed on the surface of the magnesium or magnesium alloy matrix, and the shell has good corrosion resistance and a decorative appearance. The invention also provides a manufacture method for the shell. The method comprises the following steps: providing the magnesium or magnesium alloy matrix; forming the anticorrosion layer on the magnesium or magnesium alloy matrix through magnetron sputtering, wherein the anticorrosion layer comprises the magnesium layer and the magnesium nitride layer, which are sequentially formed on the surface of the magnesium or magnesium alloy matrix; and forming the decorative color layer on the anticorrosion layer through magnetron sputtering.

The invention discloses an encapsulating structure and method for improving Frit encapsulating mechanical strength. A metal film layer is made on a substrate; a Frit encapsulating layer and inorganic quantum dot nano-film layers are prepared on an encapsulating area of cover plate glass; the cover plate glass and an encapsulating area of the substrate are subjected to butt joint; a light source is used for illuminating the cover plate glass and the encapsulating area of the substrate, and the cover plate glass and the substrate are welded and sealed. According to the encapsulating structure and method for improving the Frit encapsulating mechanical strength, the Frit encapsulating strength is enhanced through the inorganic quantum dot nano-film layers, the fused Frit encapsulating layer can permeate into gaps of the nano-film layers, a glass material and nano-film layer composite enhancing system is formed, the welding strength is improved, and the adhesion of the Frit encapsulating layer and the cover plate glass is improved; meanwhile, the uniform and compact film layers formed by the inorganic quantum dot nano-film layers can perform the action of a buffer layer and the action of releasing stress when the cover plate glass is extruded; absorption of lasers can be increased through quantum dots, a smaller laser welding Frit encapsulating layer can be adopted, and the thermal stress impact of a screen body is reduced.

The invention relates to a graphene-coated P@SnO2 core-shell quantum dot electrode material and a preparation method and an application thereof. The method comprises the following steps: (1) preparing graphene through a Hummer method; (2) adding anhydrous stannous chloride to ethanolamine, stirring and dissolving the anhydrous stannous chloride to obtain a solution, then sequentially adding red phosphorus and graphene and carrying out ultrasonic mixing to obtain a black solution; and (3) transferring the black solution into a reaction kettle for hydrothermal reaction in an oven, cooling and washing the black solution with ethyl alcohol, and drying the black solution to obtain the electrode material finally. The graphene-coated P@SnO2 core-shell quantum dot electrode material has the beneficial effects that the ion / electron transport capacity of the material is improved; the diffusion path of the material is lowered; the cycling stability of the electrode material is effectively improved; the graphene-coated P@SnO2 core-shell quantum dot anode material is prepared through a hydrothermal method; and the graphene-coated P@SnO2 core-shell quantum dot anode material demonstrates the characteristics of high discharge capacity, high power and good cycling stability when taken as an anode active material of a lithium-ion battery, is high in feasibility and easy to amplify, and conforms to the characteristics of green chemistry.

The invention discloses a method for preparing a porous silicon-copper composite material.The preparation method specifically comprises the steps that CuO powder and Mg2Si powder are mixed to be uniform to be subjected to heat treatment at the temperature of 600 DEG C-700 DEG C and then subjected to acid pickling and aftertreatment to obtain the porous silicon-copper composite material.According to the preparation method, the preparation technology is simple, the great operability is achieved, the adopted raw materials are rich in source and low in price, and the adopted method way is easily conducted in a factory; particularly, a replacement reaction of magnesium and copper oxide is ingeniously utilized, nano-scale copper particles are generated and uniformly dispersed on the surface of porous silicon while porous silicon is prepared, and the improvement role of copper on the conductivity of a whole material system and the buffer role of the copper particles on the size changes of silicon during extraction and insertion of lithium ions are more fully played.Through the potential method, the silicon-copper composite material with a unique structure can be massively synthesized.

The invention discloses a superhydrophobic powder coating, which includes functional fillers, and is characterized in that the functional fillers include porous particles, low surface energy substances and vulcanized silicone rubber; the preparation method is: adsorbing low surface energy substances on porous The step of obtaining modified porous particles inside the pores of the particles; and the step of wrapping the surface of the modified porous particles with the vulcanized silicone rubber to obtain the functional filler. It solves the problem that the existing superhydrophobic coating surface only enhances the superhydrophobic durability of the coating surface through a single repair chemical composition substance, and the method of the present invention repairs the microstructure and chemical composition substances of the damaged superhydrophobic coating surface at the same time, effectively Improves the hydrophobic durability of the coated surface.

The invention relates to a CF / PPS composite material with high impact toughness and a preparation method of the CF / PPS composite material. The preparation method comprises the following steps: (1) carrying out high-temperature decomposition on an original sizing agent on the surface of CF; (2) simultaneously carrying out microwave radiation and ultraviolet irradiation on CF in a saturated water vapor environment, and marking a product as ACF; (3) immersing the ACF into polyether sulfone / dimethylformamide, and drying to obtain sized carbon fiber MCF; (4) laminating and hot-pressing the MCF anda PPS material; (5) cooling to a certain temperature at a rate of 50-70 DEG C / min after hot pressing is finished, applying a certain pressure, maintaining the pressure for a period of time, and then relieving the pressure to obtain the CF / PPS composite material with high impact toughness. The tensile strength of the composite material is 650-820 MPa, the tensile modulus of the composite material is 50-63 GPa, the interlaminar shear strength of the composite material is 60-80 MPa, and the residual compression strength of the composite material after impact is 260-300 MPa. The method disclosed by the invention has the characteristics of high efficiency, environmental friendliness and capability of realizing large-scale production, and the prepared composite material can replace metal to be applied to the fields of aerospace, machinery, automobiles, rail transit, petroleum transportation and the like.

The invention discloses a composite multilayer crucible for beryllium-aluminum alloy induction melting and a preparation method thereof, which solves the problem in the prior art that there is no crucible suitable for beryllium-aluminum alloy induction melting. The composite multi-layer crucible of the present invention comprises an inner layer crucible, a middle layer crucible and an outer layer crucible which are fixedly connected sequentially from the inside to the outside; the inner layer crucible is composed of 92.5-97.5 parts of beryllium oxide, 1.0-2.0 parts of calcium oxide, and 0.5-2.0 parts of yttrium oxide. 2.0 parts, made of 1.0-3.5 parts of silicon carbide; the middle crucible is made of graphite; the outer crucible is made of 90-95 parts of calcium oxide, 1-3 parts of magnesium oxide, 2-4 parts of yttrium oxide, and 1-1.5 parts of zirconia , made from 0.5 to 1.5 parts of clay. The composite multilayer crucible structure of the invention has high structural strength and can shield a considerable part of the induced magnetic field. The chemical properties are stable, there is no splashing of the melt during the melting process, the degree of oxygenation is low, and some single-layer structures are replaceable and reusable, with long service life.

The invention relates to a pressure-responsive fragrant sustained-release microcapsule, and a preparation method and an application thereof. The microcapsule comprises a core material and a wall material coated outside the core material. The preparation method comprises the following steps: dispersing an essence-adsorbed porous silicon dioxide powder into deionized water under stirring, adding nanometer silicon dioxide, natural latex and a cross-linking agent I for cross-linking so as to prepare the pressure-responsive fragrant sustained-release microcapsule. The pressure-responsive fragrant sustained-release microcapsule is applied through the following steps: adding the natural latex into the prepared microcapsule, then adding a cross-linking agent II and the deionized water, carrying out uniform dispersing, injecting a dispersion into a mold, carrying out drying, cross-linking and cooling so as to prepare an elastic material, and coating an EVA hot melt adhesive onto two sides of the elastic material so as to prepare an elastic carpet. According to the invention, the preparation method is simple; raw materials are easily-available; and the essence release speed of the fragrant sustained-release microcapsule has a certain relationship with the pressure that the fragrant sustained-release microcapsule bears, so the release effect of an essence in the interior of the microcapsule is effectively improved; the usage amount of perfumes is saved; the service life of the carpet is prolonged; and significant application prospects are achieved.

The invention discloses a device for rapidly measuring cutter abrasion. The device for rapidly measuring cutter abrasion comprises a first conveying belt, a plurality of clamping mechanisms are arranged on the first conveying belt, the clamping mechanisms can clamp a cutter to be detected, a cutter abrasion detector is arranged above the first conveying belt, the cutter abrasion detector is used for detecting the cutter to be detected, and a second conveying belt is arranged below the first conveying belt and is used for conveying the to-be-detected cutter separated from the clamping mechanisms. According to the device for rapidly measuring cutter abrasion, one-by-one detection of a plurality of to-be-detected cutters in the same batch can be realized, and the clamping mechanisms can be controlled to release the clamping of the to-be-detected cutters at the specified position according to the detection result, so that qualified or unqualified to-be-detected cutters are correspondinglyconveyed to different places for collection, thereby the automatic classification is realized, the overall operation efficiency of the system is effectively improved, frequent manual taking-out is notneeded, the labor intensity of workers is reduced, and the device has wide popularization value.

The invention relates to a polymer solar battery and a preparation method of the polymer solar battery. The polymer solar battery comprises an anode substrate, a cavity buffer layer, an active layer and a metal cathode which are sequentially stacked, and also comprises an inorganic layer arranged between the active layer and the metallic cathode.\The polymer solar battery comprises the active layer / inorganic layer structure, the distribution of an optical field in the active layer can be improved, so that a generating region of a carrier is changed, a good place is provided for exciton dissociation, and meanwhile, the transmission efficiency of the carrier is improved; and a contacting interface of the active layer and the cathode is separated, so that metal atoms are prevented from diffusing to the active layer to further destroy the structure of the active layer, the role of a buffering layer is played, and the collection efficiency of electrons at the position of the electrode is improved.

The invention relates to the technical field of pressure measurement, and provides a large-scale high-toughness nano-conductive rubber sensor and a preparation and packaging method thereof. The invention adopts the method of high-temperature banburying to improve the dispersibility of the conductive filler, and solidifies the sandwich structure under high pressure to make the rubber structure itself more compact; the nanometer conductive rubber sensor prepared by the invention has wide measurement range, good sensitivity and stability. The invention uses a rubber matrix to encapsulate the nano-conductive rubber sensor, and uses a casing, a cover plate and a sealing cover to seal the rubber matrix encapsulated with the sensor. At the same time, the rubber matrix package makes the sensor as a whole have excellent performances such as high temperature resistance, waterproof, fire resistance, ultraviolet resistance and acid and alkali corrosion resistance, better aging resistance stability, and longer service life under high load conditions longevity and safety.