13results about How to "Skeleton structure is stable" patented technology

According to the anion exchange polymer, the anion exchange membrane, the method and the device provided by the invention, a cationic group with high alkali resistance is introduced into a polyaryl polymer structure, and meanwhile, a cationic side chain is introduced, so that the ionic conductivity and the alkali-resistant stability of the anion exchange polymer are synchronously improved; the anion exchange membrane prepared from the anion exchange polymer has the advantages of excellent ionic conductivity and alkali-resistant stability, can stably operate for a long time in a high pH value environment, and is not easy to degrade or reduce the performance. Therefore, the anion exchange membrane has remarkable advantages in electrochemical processes such as water electrolysis hydrogen production, so that the anion exchange membrane has a wide application prospect in electrochemical devices such as a water electrolysis reactor and the like.

The invention belongs to the technical field of electrode materials, and discloses an arene-synthesized graphene self-assembled porous carbon material and a preparation method and application thereof.The preparation method comprises the steps that 1, in the presence of protective gas, a solvent, a catalyst and optional fused salt, silicon dioxide aerogel serves as a template, arene serves as a reaction monomer, a reaction is conducted, and an arene-synthesized graphene self-assembled porous carbon material is obtained; a graphene self-assembled precursor material is obtained; and (2) carrying out carbonization treatment on the graphene self-assembled precursor material to obtain the arene synthesized graphene self-assembled porous carbon material. Aromatic hydrocarbon is combined with silicon-oxygen bonds on the surface of a silicon dioxide template, interaction of large pi bonds between graphene sheet layers is broken, and the problem that graphene materials are prone to stacking can be effectively solved; the graphene self-assembled porous carbon material prepared by the method is high in specific surface area, high in conductivity and excellent in capacitive performance.

The invention provides an all-solid-state metal lithium battery and a preparation method thereof. The all-solid-state metal lithium battery sequentially comprises a positive electrode and a negative electrode, a solid electrolyte; and the negative electrode is composed of a lithium-carbon composite material, the lithium-carbon composite material comprises a carbon sintered porous skeleton containing carbon nanotubes and silver wires, and gaps of the carbon sintered porous skeleton are filled with a lithium alloy and metal lithium. The all-solid-state metal lithium battery provided by the invention has the negative electrode which is stable in structure, light in weight and made of the lithium-carbon composite material, and is high in energy density and long in cycle life. The negative electrode made of the lithium-carbon composite material adopted by the all-solid-state metal lithium battery has tensile strength higher than that of pure metal lithium, and industrial production is facilitated. The negative electrode made of the lithium-carbon composite material is used in the all-solid-state metal lithium battery, so that the contact between the solid electrolyte and the negative electrode can be maintained under relatively small pressure, and the interface between the negative electrode and the solid electrolyte is more stable.

The invention belongs to the field of gas technical purification, and particularly relates to a honeycomb-shaped high-concentration NO2 adsorption trapping material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing adsorbent slurry by taking high-silicon molecular sieve raw powder as a raw material; (2) putting a honeycomb carrier into the adsorbent slurry for dipping and coating; and (3) naturally airing, drying and roasting the impregnated carrier to obtain the integral honeycomb-shaped high-concentration NO2 adsorbing and trapping material. On the basis of the honeycomb-shaped high-concentration NO2 adsorption trapping material (the molecular sieve silica-alumina ratio is 1000-5000), NO2 is efficiently trapped through a pressure swing adsorption technology, meanwhile, the adsorbent subjected to adsorption saturation is reversibly regenerated, high-concentration NO2 desorbed gas is obtained, NO2 recycling is achieved, NOx tail gas of a nuclear industry post-treatment plant is recycled, and the purpose of recycling the NOx tail gas of the nuclear industry post-treatment plant is achieved. A stable NO2 gas source is provided for a spent fuel post-treatment main process, the dual requirements of NO2 raw material preparation and tail gas denitration of a post-treatment plant are met, and purification and recycling of NO2 are achieved.

The invention provides a lithium-carbon composite material, a preparation method thereof and a negative electrode containing the lithium-carbon composite material. The lithium-carbon composite material comprises a carbon sintered porous skeleton containing carbon nanotubes and silver wires, wherein gaps of the carbon sintered porous skeleton are filled with lithium alloy and metal lithium. The lithium-carbon composite material disclosed by the invention is high in structural strength (tensile strength) and suitable for industrial production. In addition, the negative electrode adopting the lithium-carbon composite material disclosed by the invention is high in energy density and stable in structure in a battery cycle process, so that the cycle life of the battery is long.

The invention relates to the technical field of catalyst preparation and discloses a skeleton type iron-based molecular sieve as well as a preparation method and application thereof. The method comprises the following steps: (1) in the presence of a solvent, pre-reacting an Fe source, an M source and a zeolite molecular sieve, and drying to obtain a precursor; (2) calcining the precursor at the temperature of 500 DEG C or above for the first time, and then performing thermal modification in a hydrogen-containing atmosphere to obtain Fe / M seed crystal; and (3) mixing the Fe / M seed crystal with a silicon source, an aluminum source and a template agent, carrying out hydrothermal treatment, separating, drying, and carrying out secondary calcination at 500 DEG C or above to obtain the skeleton type iron-based molecular sieve. Through the synergistic effect of a hydrogen reduction seed crystal method and specific auxiliary metal, the skeleton type iron-based molecular sieve catalyst which has the denitration efficiency of 87% or above at the high temperature of 650 DEG C and has excellent cycle stability and high-temperature hydrothermal stability is successfully prepared.

The invention discloses a semeglutide-containing NPs hydrogel and a preparation method thereof, and relates to the technical field of polymer composites.The semeglutide-containing NPs hydrogel comprises a main drug, polylactic acid nanoparticles, dodecyl modified hydroxypropyl methyl cellulose and PBS; wherein the polylactic acid nanoparticles are prepared by wrapping graphene with polyethylene glycol-polylactic acid, the main drug is semeglutide, and the concentration of the semeglutide in the hydrogel is 2-20 mg / ml. The polylactic acid nano-particles and the dodecyl modified hydroxypropyl methyl cellulose comprise the following components in percentage by weight: 1-2wt% of the dodecyl modified hydroxypropyl methyl cellulose and 10wt% of the polylactic acid nano-particles; the long-term sustained and controlled release effect can be realized; and the degradation speed of the nanoparticles coated with the graphene oxide is inconsistent with that of the nanoparticles not coated with the graphene oxide, so that the release speed of the medicine can be further controlled.

The invention provides a metal lithium battery and a preparation method thereof. The metal lithium battery sequentially comprises a positive electrode and a negative electrode, a diaphragm; an electrolyte; and the negative electrode is composed of a lithium-carbon composite material, the lithium-carbon composite material comprises a carbon sintered porous skeleton containing carbon nanotubes and silver wires, and gaps of the carbon sintered porous skeleton are filled with a lithium alloy and metal lithium. According to the metal lithium battery, the light carbon material is used as a three-dimensional framework, so that the battery is high in energy density. The metal lithium battery is stable in negative electrode structure and long in cycle life. In addition, the lithium-carbon composite negative electrode adopted by the metal lithium battery is high in tensile strength, and is suitable for industrial production.

The application provides a high-capacity and high-rate hard carbon negative electrode material and a preparation method and application thereof, and belongs to the technical field of sodium ion battery negative electrode materials. Specifically, biomass shell raw materials are coarsely broken and sieved to obtain biomass coarse powder; the biomass coarse powder is mixed with an oxidizing agent and then pre-oxidized; mechanical pulverization is performed to obtain biomass coarse powder with a D50 of 8-15 microns; the biomass coarse powder is added into mixed acid and heated in a water bath, and then washed with water until neutral to obtain a purified precursor; and finally, the precursor is subjected to staged high-temperature carbonization in a vacuum carbonization furnace. Through specific process parameters, the prepared hard carbon material has a hierarchical porous structure and a suitable graphite microcrystalline layer spacing, and has a low total content of metal impurities; when applied to a sodium ion battery negative electrode, the hard carbon material exhibits a high reversible specific capacity, a high initial coulombic efficiency, and excellent long cycle stability and rate performance.

The application discloses a kind of nitrogen-doped porous carbon spheres based on arginine and its preparation method and application, belong to sodium ion battery negative electrode material technical field.Preparation method includes the following steps: arginine and benzene dimethylaldehyde are added to reaction solvent, after being mixed uniformly, nitrogen-doped porous carbon sphere precursor is obtained by transferring to reaction kettle and carrying out solvothermal reaction;Nitrogen-doped porous carbon sphere precursor is carbonized at 650-850 DEG C under protective gas atmosphere to obtain nitrogen-doped porous carbon sphere.The nitrogen-containing polymer sphere obtained by the reaction of benzene dimethylaldehyde and arginine is used as carbon precursor in the application, and nitrogen-doped porous carbon sphere is obtained by one-step carbonization, which can be used as sodium ion battery negative electrode material and has excellent electrochemical sodium storage performance.

The application discloses a porphyrin framework polymer and a preparation method and application thereof. The porphyrin framework polymer takes tetra(5-bromothiophenyl) porphyrin as an intermediate, introduces a thiophene substituent at four meso positions of the porphyrin, and is synthesized through Stille coupling reaction with a thiophene tin reagent. The preparation process is mild, and the purification is simple. The obtained polymer has high electrolyte solution solubility and excellent electronic conductivity, effectively solves the technical problems that an organic small-molecule active material is easily dissolved and lost in an organic electrolyte, has poor conductivity and the like, and simultaneously significantly improves the ion transmission capacity of the material. The porphyrin framework polymer is used as a positive electrode active material, is matched with a metal sodium negative electrode and a NaPF6 carbonate electrolyte to assemble a battery, and the battery has a capacity attenuation of no more than 10% under a current of 10 A g ‑1 7000 cycles under a large current, has high specific capacity, excellent rate and long cycle performance, and is suitable for large-scale long-acting energy storage sodium ion batteries.

The invention provides an aerogel composite material, a preparation method thereof and a thermal insulation energy storage material, the aerogel composite material has a porous skeleton structure, the porous skeleton structure comprises phase change material particles and a polymer, and the polymer coats at least part of the surface of the phase change material particles; the phase change enthalpy value of the aerogel composite material is not lower than 200J / g, and the heat conductivity coefficient is not higher than 0.16 W / (m.K); the phase change material particles and the polymer are jointly assembled to form an aerogel skeleton structure, the aerogel composite material is obtained, a base body of the aerogel composite material is composed of the phase change material particles and a polymer network, the aerogel composite material has excellent heat insulation performance, meanwhile, the phase change material serves as a functional phase to provide phase change heat storage capacity, and the phase change heat storage capacity is improved. The synergistic effect of the phase change material and the polymer not only constructs a stable skeleton structure, but also improves the low thermal conductivity and high energy storage density of the aerogel composite material, and meets the dual requirements for efficient heat insulation and energy storage in practical application.

The invention discloses a super-hydrophobic self-cleaning aluminum alloy coating and a preparation method thereof, and belongs to the technical field of metal surface treatment.The preparation method comprises the following steps that S1, an aluminum alloy substrate is pretreated; s2, mixing TEOS, absolute ethyl alcohol and diluted hydrochloric acid in a beaker, and adding PFOTES to obtain sol; s3, mixing the SiO2 powder, the TiO2 powder, PVP (Polyvinyl Pyrrolidone) and deionized water, and carrying out spray granulation, so as to obtain SiO2-TiO2 composite powder; s4, the SiO2-TiO2 composite powder, absolute ethyl alcohol and PFOTES are mixed, and composite powder slurry is obtained; s5, spraying the sol on the surface of an aluminum alloy substrate, and drying to obtain an aluminum alloy basic coating; s6, the composite powder slurry is sprayed on the aluminum alloy coating base layer, and after drying, the aluminum alloy composite coating is obtained; and S7, the aluminum alloy substrate is placed in a drying oven for heat treatment, and the super-hydrophobic self-cleaning aluminum alloy coating is obtained. The coating system disclosed by the invention is stable and can effectively realize self-cleaning.