7results about How to "Fully covered" patented technology

The present application relates to the technical field of high polymer material flame-retardant modification, and particularly relates to a COF hierarchical modification APP-based core-shell flame-retardant smoke suppressant, a preparation method and application thereof. The flame-retardant smoke suppressant takes APP as a flame-retardant core layer; takes PVP as a soft template agent, and assists in situ growth of melamine-p-phenylenedimethylene formaldehyde (COF) on the surface of APP to adsorb combustible volatile components in the initial pyrolysis stage, provide a gas source, and act as a Fe 3+ coordination skeleton; takes tannic acid as a coordination agent and a carbon source, and constructs a multi-level core-shell structure with Fe 3+ coordination. The present application realizes integration of flame-retardant and smoke suppression functions through hierarchical modification. When the flame-retardant agent is applied to polyurethane, it can significantly reduce the heat release rate, smoke release rate and toxic gas generation amount, and simultaneously improve the compatibility with the matrix, effectively overcoming the defects of poor compatibility and insufficient flame-retardant and smoke suppression performance of traditional APP flame-retardant agents. The present application has simple preparation process and controllable conditions, and is suitable for industrial production.

The application discloses a kind of MXene-based composite wave-absorbing materials and preparation method thereof, water-based electromagnetic functional color paste and preparation method and application, the MXene-based composite wave-absorbing material provided in the application is with two-dimensional layered MXene nanosheet as carrier, and Fe3O4@Ag core-shell structure nanosphere is loaded on the surface and interlayer of two-dimensional layered MXene nanosheet.The above-mentioned MXene-based composite wave-absorbing material is by electrostatic self-assembly process, Fe3O4@Ag core-shell structure nanosphere is loaded on the surface and interlayer of two-dimensional layered MXene nanosheet, the composite of both is realized.In addition, the application further provides water-based electromagnetic functional color paste comprising the above-mentioned composite wave-absorbing material, the color paste shows excellent storage stability and outstanding electromagnetic shielding and absorption performance, and can be suitable for a variety of coating processes.

The application relates to a sodium ion battery electrode material, in particular to a preparation method of a phosphate or fluorophosphate polyanion compound and application of the phosphate or fluorophosphate polyanion compound in a sodium ion battery electrode material; the iron-based phosphate polyanion compound has one or two or more of structures shown in formula I, formula II, formula III, formula IV or V, VI: Na4Fe3(PO4)2P2O7, Na3Fe2(PO4)1P2O7, NaFePO4, Na2FeP2O7, Na2FePO4F, Na5Fe2(PO4)2F3; the prepared phosphate or fluorophosphate polyanion compound is uniform in granularity, complete in carbon coating, high in purity and good in electrochemical performance, especially in rate performance.

The application belongs to the field of preparation of carbon nanotubes with special structure, and relates to a high-conductivity carbon-coated single-walled carbon nanotube carbon net, a preparation method and application. The method uses plasma arc discharge to prepare single-walled carbon nanotubes, uses in-situ arc discharge or high-temperature chemical vapor deposition to form a high-crystallinity carbon layer on the surface of the single-walled carbon nanotubes after treating a gaseous carbon source, and obtains a high-conductivity carbon-coated single-walled carbon nanotube carbon net with a macroscopic filamentous structure. The method can increase the purity of the product by more than 2 times and the yield by more than 3 times. Meanwhile, the high-crystallinity carbon coated on the surface of the carbon nanotubes can effectively improve the conductivity and dispersibility of the product, and the powder conductivity can reach 1.3*10 4 S·m ‑1 This method greatly saves the production cost, reduces the acid consumption for purifying unit mass of product, reduces the environmental pollution caused by waste acid, and has important application value in conductive paste and the like due to the high conductivity and good dispersibility of the product.

This invention relates to the field of cable technology, specifically to a processing technology for high-temperature resistant, ultra-flexible motor lead wires. The process involves preparing two types of hexagonal boron nitride fillers with different surface properties through hydroxylation and silane modification, and applying them in separate layers of a three-layer insulating compound. Combined with a polysiloxane alkyl body with increasing phenyl content from the inside out, flexible single-end segments on the inner side, and a differentiated crosslinking agent / inhibitor system, the lead wire is obtained through three-layer co-extrusion and multi-stage temperature-increasing vulcanization. This process solves the problems of decreased flexibility, poor bending reliability, and easy failure of interlayer interfaces caused by high phenyl / high filler content in traditional methods, achieving a balance between high-temperature resistance, ultra-flexibility, and stable electrical performance.

The invention relates to the technical field of batteries, and discloses a modified high-nickel positive electrode material and a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing a cobalt salt, an organic ligand and a solvent to obtain an MOF precursor solution; (2) dispersing a high-nickel positive electrode material in the MOF precursor solution for reaction to obtain an intermediate product; and (3) carrying out solid-phase mixing on the intermediate product and a sulfur source, and carrying out heat treatment to obtain the modified high-nickel positive electrode material, the modified high-nickel positive electrode material comprises a high-nickel positive electrode material and a composite coating layer, wherein the composite coating layer comprises cobalt sulfide and a carbon material. According to the preparation method provided by the invention, the MOF material is grown in situ on the high-nickel positive electrode material, and then the sulfur source is used for vulcanization, so that the uniform and compact composite coating layer which is firmly combined with the matrix on the nanoscale is formed on the surface of the positive electrode material, the interface stability, the thermal stability and the conductivity of the material are improved, and the electrochemical performance of the battery material is further improved.

The invention discloses nickel-coated graphite composite powder and a preparation method thereof, and relates to the technical field of composite materials. The preparation method comprises the following steps: taking a carbon raw material as a starting point, mixing a nitrogen source, a phosphorus source and a sulfur source, performing high-temperature treatment to obtain modified artificial graphite powder, adding the modified artificial graphite powder into a plating solution mixed with nickel salt, a reducing agent, a complexing agent and a stabilizing agent, and optimizing process parameters. The nickel-coated graphite composite powder which is complete in coating, excellent in anti-aging performance and electromagnetic shielding performance and simple and efficient in preparation process is prepared. The nickel-coated graphite composite powder can be widely applied to multiple fields of electromagnetic shielding materials, conductive fillers and the like.