13results about How to "Increase the interface contact area" patented technology

The invention relates to a polymer-based composite solid electrolyte, a preparation method and a sodium solid-state battery, and belongs to the technical field of solid-state batteries. The polymer-based composite solid electrolyte is prepared from the following components in parts by mass: 8 to 12 parts of alkene polymer, 4 to 8 parts of sodium salt and 1 to 8 parts of filler, and the filler is nitrided nano TiO2. The polymer-based composite solid electrolyte can be prepared in a simple and efficient mode, the ionic conductivity is high, the electrochemical stability window is wide, the ionic conductivity reaches 0.3-1.2 mS / cm, and the electrochemical stability window reaches 4.3-5.5 V; and meanwhile, the formation of good SEI can be promoted in the sodium solid-state battery, and the interface stability between the electrolyte and the electrode is improved.

The invention discloses a lithium iron phosphate positive electrode material, a preparation method and a lithium ion battery, and relates to the technical field of lithium ion positive electrode materials. The preparation method comprises the following steps: mixing a lithium source, an iron source, a phosphorus source and a carbon source, adding a graphene dispersion liquid, and performing high-speed sanding and drying to obtain intermediate powder; and carrying out compression molding on the intermediate powder, and carrying out microwave heat treatment to obtain the lithium iron phosphate positive electrode material. Graphene and a mixture containing a lithium source, an iron source, a phosphorus source and a carbon source are subjected to high-speed sanding in a high-speed sanding mode, the dispersity among particles is enhanced, the lithium iron phosphate positive electrode material is generated after microwave heat treatment, the carbon source forms a carbon coating layer on the surface of LiFePO4, graphene is staggered in gaps of LiFePO4 particles, a unique three-dimensional conductive network structure is formed, and the lithium iron phosphate positive electrode material is prepared. Meanwhile, pore structures exist among LiFePO4 particles, so that the interface contact area between the LiFePO4 positive electrode material and an electrolyte is greatly expanded, the migration process of lithium ions is effectively accelerated, and the low-temperature performance is remarkably improved.

The invention discloses a micro-texture porous multilayer structure composite current collector and a preparation method thereof. The composite current collector comprises a porous polymer film located in the middle, chemical plating metal layers located on the two sides of the porous polymer film, micro-texture metal copper layers located on the outer sides of the two chemical plating metal layers, and corrosion-resistant lithium-loving layers located on the outer sides of the two micro-texture metal copper layers. The surface area of the current collector is increased by arranging the porous polymer film and the micro-texture metal copper layer, so that the charging and discharging current is increased, and the effect of inhibiting the abnormal growth of lithium dendrites is achieved; metallization of the outer surface of the porous polymer film is realized by arranging the chemical plating metal layer, so that low-cost and high-yield metallization is realized; by arranging the corrosion-resistant lithium-loving layer, the corrosion resistance and the lithium-loving property of the current collector are improved, the corrosion-resistant requirement of a sulfide solid-state battery as a representative lithium ion battery is met, and the effects of promoting nucleation of lithium dendrites and inhibiting abnormal growth of the lithium dendrites are achieved.

The application discloses a preparation method of a P / N / Si multi-element reactive halogen-free flame retardant, specifically comprising the following steps: preparing DOPO grafted 3-chloropropyl trimethoxysilane, which is denoted as PPTMS; preparing a cage-like POSS containing DOPO, which is denoted as PSC; mixing the PSC with toluene to obtain a PSC solution; uniformly mixing maleimide MI with toluene, dropwise adding the PSC solution into the maleimide MI solution to perform a condensation reflux reaction, and performing vacuum rotary evaporation to obtain the P / N / Si multi-element reactive halogen-free flame retardant. The phosphorus-containing monomer, the nitrogen-containing monomer and the silicon-containing monomer in the flame retardant are covalently bonded, and the multi-elements in the molecule exist in the form of a collection acid source, a carbon source, a gas source and a ceramicization, wherein the phosphorus-containing monomer is dehydrated into carbon, the nitrogen-containing monomer releases non-combustible gas to dilute the gas phase, and the silicon-containing monomer forms a dense ceramic barrier layer to improve the triple synergy of carbon residue strength and anti-dripping property, thereby greatly improving the flame retardant efficiency.

The invention provides an extrusion screw for producing a PVC cast film and an extrusion device, and belongs to the technical field of extrudes.The extrusion screw comprises a screw body, the screw body comprises a feeding section, a compression homogenizing section, a plasticizing section and an extrusion section which are sequentially arranged in the axial direction of the screw body, first screw flights are distributed on the feeding section, the compression homogenizing section and the plasticizing section, and second screw flights are distributed on the extrusion section; the first screw flight is distributed on the feeding section, the second screw flight is distributed on the extrusion section, a barrier mixing head and a stirring mixing head are arranged on the extrusion section, the barrier mixing head is located between the first screw flight and the second screw flight, the feeding section, the plasticizing section and the extrusion section are all of an equal-diameter shaft structure, the diameter of the feeding section is smaller than that of the plasticizing section, and the compression homogenizing section is of a variable-diameter shaft structure. The diameter of the compression homogenizing section is gradually increased from one end close to the feeding section to one end close to the plasticizing section. The screw has the beneficial effects that the structural design of the screw is reasonable, the mixing and homogenizing effects of materials can be ensured, the materials cannot stay for a long time at high temperature, and meanwhile, the productivity efficiency is ensured.

The present invention relates to the technical field of water treatment, and specifically to a method for photocatalytic treatment of industrial oily wastewater. After a double core-shell structure photocatalyst is added to the industrial oily wastewater, light is continuously provided for photocatalytic treatment. The double core-shell structure photocatalyst has a bimetallic sulfide as a core, titanium dioxide as an intermediate shell layer, and a perovskite-type oxide as an outer shell layer. The photocatalytic treatment method provided by the present invention has an excellent treatment effect on industrial oily wastewater and can be widely promoted and applied.

The invention relates to the technical field of water treatment, and specifically to a combined treatment method for industrial sewage. An ozone catalyst is first added to the industrial sewage, and ozone is continuously provided for ozone catalytic oxidation, and clear liquid is collected. A photocatalyst is then added to the clear liquid, and light is continuously provided for photocatalytic oxidation treatment. The ozone catalyst is a spinel ferrite. The photocatalyst has a multiple core-shell structure, and the photocatalyst uses Fe3O4 microspheres as the core, and from the inside to the outside, there are SiO2 layers, Ag layers and perovskite oxides. The invention achieves a removal efficiency of 99.9% for oil pollution in petroleum industrial sewage in a relatively short time through ozone catalytic oxidation combined with photocatalytic oxidation, and the catalysts are all magnetic and easy to remove, and the reaction conditions are mild and there is no secondary pollution.

The invention relates to the technical field of batteries, in particular to a solid-state electrolyte membrane and a preparation method thereof, a solid-state battery and an electric device. The solid electrolyte membrane provided by the invention comprises a lithium-containing solid electrolyte and a composite binder in a mass ratio of (99.2-99.9): (0.1-0.8), the composite binder comprises a first binder and a second binder; the first binder comprises polytetrafluoroethylene; the second binder comprises polyimide, and the polyimide has a structural unit as shown in a formula (I). Wherein each R1 is independently a single bond,-O-,-C (= O)-, an ester group, # imgabs 0 #, # imgabs 1 # or # imgabs 2 #; and L1, L2 and L3 are each independently an arylene group with a carbon atom number of 6 to 12. A ring is selected from a structure shown in a formula (A-1) to a formula (A-6), and R2 is independently H, halogen, alkyl with the carbon atom number of 1-8 or halogenated alkyl with the carbon atom number of 1-8 when appearing each time; m is a positive integer greater than or equal to 1.

The application provides a preparation method of a gel polymer electrolyte for energy storage frequency modulation and an integrated battery, and belongs to the technical field of lithium ion secondary batteries and electrochemical energy materials, and can at least partially solve the problems of the existing gel polymer electrolyte, such as the contradiction between mechanical properties and ionic conductivity, poor interface compatibility, weak lithium dendrite inhibition ability, and insufficient thermal stability and flame retardancy. The gel polymer electrolyte prepared by constructing a dynamic covalent cross-linked polyimide-polyionic liquid interpenetrating network and using monatomic iron-anchored phosphorus-doped carbon nitride nanosheets as a multifunctional filler has excellent mechanical properties and high ionic conductivity, and the flame retardancy is greatly improved, and the growth of lithium dendrites can be effectively inhibited. Meanwhile, the integrated battery is prepared by using an ultraviolet light-initiated in-situ polymerization process, which is suitable for the roll-to-roll large-scale production line of existing lithium batteries, and the interface bonding force of the battery is strengthened, the cycle stability is improved, and the high-frequency response requirement of energy storage frequency modulation is met.

The invention discloses a heat-conducting composite material for a high-strength, high-toughness and corrosion-resistant flow battery and a preparation method of the heat-conducting composite material. The method comprises the following steps: S1, preparing modified carbon fibers; s2, preparing a modified carbon fiber functional master batch; and S3, preparing the high-strength, high-toughness and corrosion-resistant heat-conducting composite material for the flow battery. The heat-conducting composite material prepared by the invention has a fishbone-like microstructure, and is constructed through mutual interpenetration of carbon fibers and graphene sheet layers, so that covalent bond combination of a multi-phase interface of the material is improved, the interface thermal resistance is remarkably reduced, and the heat-conducting property of the material is favorably improved. The method is simple in technological process, controllable in cost and suitable for industrial large-scale production; the prepared composite material has excellent mechanical properties and chemical corrosion resistance, can meet various high-performance requirements of the flow battery on the material, can be widely applied to manufacturing of energy storage systems requiring high thermal conductivity and corrosion resistance such as the flow battery, and meets various composite high-performance requirements of the system.

This invention discloses a double-through-structure bimetallic composite material, its preparation method, and its application. The composite material comprises a stainless steel porous framework and an aluminum-based composite material filler; the aluminum-based composite material is uniformly filled within the stainless steel porous framework structure; the aluminum-based composite material comprises AlSi. X Mg (0 ≤ x ≤ 10) and B4C. The composite material of this invention consists of spherical AlSi... X This composite material is prepared by mixing Mg (0 ≤ x ≤ 10) alloy powder and B4C powder in a specific ratio and then sintering. It exhibits excellent energy absorption properties, high strength, and impact resistance, making it suitable for applications in aerospace, automotive, and protective equipment. The production method is simple, with a short production cycle and high efficiency. Furthermore, this material significantly improves the deformation resistance and impact resistance of traditional stainless steel and aluminum alloys under impact conditions, thereby broadening its application range in industrial fields.

The invention discloses a PbBiO2Br anchored carboxyl functionalized carbon nitride composite catalyst and preparation and application thereof.The composite catalyst comprises carbon nitride nanosheets and PbBiO2Br nanosheets, the carbon nitride nanosheets are carboxyl functionalized carbon nitride, the PbBiO2Br nanosheets are highly dispersed on the surfaces of the carbon nitride nanosheets, and the PbBiO2Br nanosheets are uniformly distributed on the surfaces of the carbon nitride nanosheets. The PbBiO2Br nanosheet is tightly anchored on the surface of the carbon nitride nanosheet through electrostatic self-assembly coupling high-temperature calcination, so as to form the composite photocatalyst with a 2D / 2D interface contact structure. CCN plane charge transfer is improved through carboxyl functionalization, the 2D / 2D structure of the composite photocatalyst has the advantages of large interface contact area, multiple active reaction sites, short mass transfer path, stable structure and the like, and the composite photocatalyst is high in visible light absorption capacity, high in photo-induced electron plane / interface transmission rate, high in electron hole separation efficiency and high in reactive oxygen substance yield; the good degradation performance is realized on bisphenol A in a water body.

The invention relates to the technical field of water treatment, in particular to a combined treatment method of industrial sewage, which comprises the following steps: adding an ozone catalyst into the industrial sewage, continuously providing ozone for catalytic ozonation, collecting clear liquid, adding a photocatalyst into the clear liquid, and continuously providing illumination for photocatalytic oxidation treatment, wherein the ozone catalyst is spinel type ferrite; the photocatalyst is of a multiple core-shell structure, Fe3O4 microspheres serve as a core body of the photocatalyst, a SiO2 layer, an Ag layer and perovskite type oxide are sequentially arranged from inside to outside, and through combination of ozone catalytic oxidation and photocatalytic oxidation, the removal efficiency of 99.9% on oil stains in petroleum industrial sewage within a short time is achieved; and the catalyst has magnetism and is easy to remove, the reaction condition is mild, and secondary pollution is avoided.