1150 results about "Polyaniline" patented technology

The invention relates to the field of electric heating materials, and provides a graphene-based heating coating and a preparation method thereof. The coating is prepared from functionalized graphene, a surface modified bismuth telluride nanobelt, polyaniline, bisphenol A epoxy acrylate, polyurethane acrylate, a dispersing agent, a flatting agent, a silane coupling agent, a defoaming agent and a propylene glycol methyl ether acetate / N-methyl pyrrolidone mixed solvent. The functionalized graphene is obtained by modifying a hyperbranched polyolefin-acryloyl-POSS copolymer, and carrying out ultrasonic stripping, centrifugal separation, gradient washing and vacuum drying; the surface-modified bismuth telluride nanobelt is modified by an amino silane coupling agent, so that the interfacial compatibility is improved. The preparation method comprises the steps of solvent premixing, nanofiller dispersion, ultrasonic homogenization, coupling agent modification, ultraviolet curing and thermocuring. The heating coating provided by the invention has high conductivity, excellent thermal stability and adhesive force, and can be widely applied to heating electric appliances and intelligent temperature control equipment.

The invention belongs to the technical field of aerogel materials, and particularly relates to high-performance antistatic aerogel for 3D printing as well as a preparation method and application thereof. According to the invention, inorganic hollow nanoparticles are selected as a nucleating modifier for in-situ polymerization of aniline monomers in a polyamide solution, so that polyaniline-coated inorganic hollow nanoparticles are uniformly dispersed in polyamide, and the aerogel composite material with polyamide as a continuous phase and polyaniline-coated inorganic hollow nanoparticles as a conductive and reinforced phase is formed. The use of the hollow inorganic nanoparticles avoids the problem that the solid inorganic nanoparticles lose the characteristics of the inorganic nanoparticles due to high specific gravity and high surface energy, and easy agglomeration or adsorption with other substances in the preparation process of the solid inorganic nanoparticles. The inorganic hollow nanoparticles are adopted as a nucleating modifier, so that the problems of agglomeration of solid nanoparticles and dispersion in a polyamide matrix are well solved.

The invention belongs to the technical field of polymer preparation, and particularly relates to a curved-surface polyaniline modified 3D printing polyurethane material and application thereof. According to the preparation method, an ice crystal hard template method and a polyether glycol soft template method are combined, so that the microstructure of polyaniline is adjusted, and the curved polyaniline with regular morphology is prepared. The curved-surface arc-shaped structure has a large specific surface area, can form more contact sites with resin when being directly melt-blended with the resin, is beneficial to construction of a conductive path, and is not easy to agglomerate due to the curved-surface structure. The polyaniline with the arc-shaped structure is of a three-dimensional space structure and is directly blended with the resin to form a randomly arranged conductive network structure, so that the composite material is not easy to break when being impacted, and can be better embedded between the resin to form a stress transfer channel, and a complex three-dimensional network structure is constructed; the mechanical property and the antistatic capability of the product are improved.

The invention relates to a flexible electrochemical pH sensor as well as a preparation method and application thereof. Wherein the flexible electrochemical pH sensor comprises a flexible nanofiber substrate as well as a working electrode and a reference electrode which are arranged on the surface of the flexible nanofiber substrate at an interval, the working electrode comprises a first working part and a first wire part connected with the first working part, and the first working part is provided with a polyaniline sensitive layer. The flexible electrochemical pH sensor has the characteristics of high sensitivity, good flexibility and good air and moisture permeability, can be tightly attached to the surface of skin to monitor the pH value of body fluid, and is high in monitoring accuracy and simple in manufacturing method.

The invention discloses a gradient composite coated modified lithium manganese iron phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of positive electrode materials. An LMFP precursor is pretreated through a citric acid-ethanol mixed solution, an active crystal face is exposed, and then a three-dimensional gradient coating structure of a polydopamine (PDA) chemical bonding layer, an MXene nanosheet middle layer and a polyaniline (PANI) conductive outer layer is sequentially constructed on the surface of the material, so that the electronic conductivity of the lithium manganese iron phosphate positive electrode material is increased to 10 <-3 > S / cm magnitude, and the performance of the lithium manganese iron phosphate positive electrode material is improved. The capacity retention ratio (1C) of 500 cycles is larger than 90%, the coating layer is not prone to falling off, and meanwhile dissolution of manganese ions is effectively inhibited.

The preparation method comprises the following steps: S1, mixing a hydrochloric acid solution with organic sodium sulfonate, then adding aniline and water, stirring and dissolving, then adding an oxidizing agent to carry out doping reaction, and carrying out suction filtration, washing, drying and grinding on a reaction product to obtain sodium-modified polyaniline; s2, uniformly mixing a negative electrode active material, a conductive agent and polytetrafluoroethylene, and then adding sodium polyaniline and an organic sodium supplement agent in a nitrogen or inert atmosphere for fibration treatment to obtain fibration powder; and S3, performing hot pressing on the fiberized powder onto the current collector to obtain the lithium ion battery. The prepared pre-sodium-modified negative electrode dry-method electrode has relatively good peeling strength and pole piece flexibility, and the condition that a traditional wet-method thick electrode is easy to crack is relieved; meanwhile, the dry-method electrode subjected to sodium modification treatment can induce uniform deposition of sodium ions, so that the dynamic performance of the whole sodium battery is improved, the problem of cyclic sodium precipitation is avoided, and the service life of the battery is further prolonged.

The invention discloses a positive electrode material of an upward flow type electrochemical dephosphorization system, and the preparation method comprises the following steps: preparing a polyaniline-coated ZIF-8 derived carbon loaded magnesium-aluminum double-metal hydroxide electrode material, and the preparation process comprises ZIF-8 carbonization in a nitrogen atmosphere, aniline oxidation polymerization, and loading of magnesium-aluminum double-metal hydroxide by a coprecipitation method; the electro-adsorption positive electrode material belongs to a polyaniline magnesium aluminum double-metal hydroxide mesoporous synergistic platform in ZIF-8 derived carbon, and has a nano frame with strong pore accessibility and high electrochemical activity; the synergistic process comprises attraction of polyaniline to phosphate ions and trapping of the magnesium-aluminum double-metal hydroxide. The electrode prepared by the method has a unique mesoporous framework, a large number of phosphorus removal sites are obtained on the surface of the electrode, a rapid ion storage behavior mainly based on a capacitance control process is realized on a solid-liquid interface, phosphate in water can be effectively separated in an electro-adsorption system, and the method is a pollution control process with a clear mechanism.

The invention provides an aerogel-based heat-preservation, heat-insulation and waterproof composite coating material for a building outer wall and a preparation method thereof, and belongs to the field of building materials. Through hydrophobic modified silicon dioxide aerogel, a lightweight heat insulation frame is provided, and the waterproofness and compatibility are improved; the mechanical property and the crack resistance are enhanced through the modified potassium titanate nanofibers, and self-adaptive heat insulation is achieved; the thermoelectric effect, the wear resistance and the thermal regulation performance are optimized through plasma treatment and polyaniline coated tungsten carbide nanoparticles; the heat management performance, the crack resistance and the comprehensive heat insulation and waterproof capacity are improved through graphene oxide composite modified boron nitride; the flexibility, the hydrophobicity and the interfacial compatibility are improved through organic silicon modified bisphenol A epoxy resin; and the performance of the coating is optimized through the synergistic effect of the components.

The invention provides conductive paste, a solar cell, a preparation method of the solar cell and a photovoltaic module. The conductive paste comprises the following components in parts by weight: 70-85 parts of silver powder, 3-8 parts of glass powder, 0.1-2 parts of an additive and 12-25 parts of an organic carrier, wherein the silver powder comprises spherical silver powder and flaky silver powder; the glass powder is prepared from the following components in parts by weight: 65 to 75 parts of Bi2O3, 18 to 25 parts of TeO2 and 8 to 12 parts of V2O5; the additive is a carbon material and / or conductive metal oxide nanoparticles; the organic carrier comprises an infrared absorbing material; the infrared absorption material is selected from any one or more of copper phthalocyanine, a polyaniline-carbon nanotube compound and a tungsten oxide nanowire. The conductive paste can improve the conductivity of the conductive paste and improve the efficiency of the conductive paste in a laser sintering process, so that the contact resistivity is reduced, and the photoelectric conversion efficiency of a photovoltaic solar cell is improved.

The invention discloses an MXene-based coating with a near-infrared light induction interaction effect and a preparation method of the MXene-based coating, and relates to the technical field of coatings. The preparation method comprises the following steps: a nano microcapsule and MXene powder are subjected to in-situ growth to form a composite dispersion liquid, the nano microcapsule is of a core-shell structure, a shell layer material is selected from at least one of polyaniline, polyurea, polyurethane, polyacrylate and silicon dioxide, a core contains a functional substance, and the surface of the core contains a porous material. The functional substances are selected from at least two of a corrosion inhibitor, a fluorescent indicator and a lubricant; adding a thermal reversible coating containing dynamic covalent bonds and a curing agent into the composite dispersion liquid, and uniformly mixing to form a homogeneous coating; and spraying the homogeneous coating on the surface of a base material, and curing to obtain the coating. The coating is high in mechanical strength, has a near-infrared light triggered self-repairing function, is high in self-repairing rate, and can realize multiple functions such as fluorescence labeling, corrosion early warning and lubrication coordinated regulation and control.

The embodiment of the invention relates to the field of energy storage, and provides a secondary battery and a preparation method thereof, an energy storage system and electric equipment. The negative electrode active material comprises a silicon-based material, honeycomb porous graphite and a polypyrrole layer, the surface of the honeycomb porous graphite is coated with the polypyrrole layer, the silicon-based material is embedded in pores of the honeycomb porous graphite, and the silicon-based material comprises silicon particles, a poly N-isopropylacrylamide layer and a disulfide bond-containing polyaniline layer. The poly (N-isopropylacrylamide) layer and the disulfide bond-containing polyaniline layer are coated on the surfaces of the silicon particles, the poly (N-isopropylacrylamide) layer is positioned between the silicon particles and the disulfide bond-containing polyaniline layer, and the honeycomb porous graphite comprises a graphite flake and a carbon layer which is positioned on the surface of the graphite flake and is of a honeycomb pore structure. The secondary battery formed by assembling the negative electrode active material disclosed by the invention has relatively high cycling stability, high temperature resistance, rate capability, gram volume and safety.

The invention discloses a super-hydrophobic road ice-inhibiting coating based on a photothermal effect and nano modified particles and a preparation method of the super-hydrophobic road ice-inhibiting coating. The preparation method comprises the following steps: introducing silane modified nano silicon dioxide (SiO2) and titanium dioxide (TiO2) particles into a polyaniline solution, and preparing the composite super-hydrophobic powder through a chemical oxidation polymerization method. The preparation method comprises the following steps: firstly, modifying the surfaces of SiO2 and TiO2 nanoparticles by adopting a silane coupling agent, and endowing the SiO2 and TiO2 nanoparticles with low surface energy and hydrophobic property; and then adding the modified nano-particles into an aniline monomer solution, reacting with doped acid and an oxidizing agent, so that polyaniline molecules are subjected to in-situ polymerization on the surfaces of the particles, and the composite super-hydrophobic powder with a micro-nano structure is formed. The obtained composite material has excellent photothermal conversion performance and super-hydrophobic performance at the same time, and the efficient photothermal material heat absorption ice melting effect and the synergistic ice restraining effect of the photothermal material and the super-hydrophobic material can be achieved. Compared with a traditional ice-inhibiting coating, the coating disclosed by the invention shows stronger ice-resisting capability in a low-temperature and high-humidity environment, has good durability, mechanical stability and environmental protection property, and is suitable for the field of ice prevention and ice inhibition in cold regions such as roads, bridges, airport runways and the like.

The present invention discloses a method for preparing a flexible polyaniline / biomass carbon electromagnetic shielding material. After high-temperature carbonization of a fiber fabric, a structurally ordered biomass carbon matrix is ​​obtained. Under the synergistic action of an oxidant and a dopant, aniline monomer is in situ oxidatively polymerized to generate polyaniline that is adsorbed on the surface of the biomass carbon matrix, thereby obtaining the polyaniline / biomass carbon electromagnetic shielding material. The electromagnetic shielding material of the present invention has an intricate and ordered two-dimensional network structure, which helps to establish a conductive network and exhibits excellent electromagnetic shielding effectiveness. In addition, the unique flexibility can fully meet the special requirements of flexible wearable electronic devices, electromagnetic shielding clothing fillers, etc. for the performance of electromagnetic shielding materials. The synthesis process of this method is safe and environmentally friendly, and the required consumables are cheap and abundant, making it suitable for commercialization and industrialization requirements.

The invention discloses a high-strength, high-conductivity and heat-resistant aluminum-based composite material. The aluminum-based composite material is formed by compounding and sintering 90-95 wt% of an aluminum alloy matrix and 5-10 wt% of a conductive fiber membrane. A trace amount of Zr, Hf and B elements are added into the aluminum alloy matrix, and the effects of refining grains, purifying impurities and improving the electric conductivity, heat resistance and comprehensive mechanical performance of the alloy matrix can be achieved. The conductive fiber membrane is a polyaniline / polyacrylonitrile composite conductive fiber membrane doped with nano-copper particles and cerium oxide particles, and polyaniline and polyacrylonitrile blended spinning can improve the strength and stability of the fiber membrane. And the conductivity of the fiber membrane and the bonding strength of the fiber membrane and an aluminum alloy matrix can be further improved through doping of the nano-copper particles and the cerium oxide particles. The aluminum-based composite material disclosed by the invention has good electrical conductivity and heat resistance and excellent comprehensive mechanical properties.

The invention discloses a preparation method and application of a zinc-bromine flow battery positive electrode material, and belongs to the field of zinc-bromine flow batteries. The preparation method comprises the following steps: dissolving aniline and a dithio compound in an acidic ice bath, dropwise adding a peroxy strong oxidant to generate a polyaniline-disulfide bond copolymer, dialyzing, and freeze-drying to obtain powder; then heating soluble silver salt, a reducing agent, a hydrophilic dispersing agent and an organic sulfydryl silane coupling agent to prepare functionalized nano-silver particles; the powder and nano-silver particles are dispersed in N-methyl pyrrolidone for ultrasonic treatment, and dynamic self-repairing coating slurry is prepared; and performing acid pretreatment on the carbon fiber paper, and performing electrochemical deposition on the slurry to prepare the zinc-bromine battery positive electrode material. According to the zinc-bromine battery positive electrode material, the coulombic efficiency and the voltage efficiency of a zinc-bromine flow battery are remarkably improved and the cycle life of the zinc-bromine flow battery is remarkably prolonged through methods of dynamic covalent bonds, nano-silver catalysis, a hierarchical pore structure, carbon fiber pretreatment and the like, and the zinc-bromine flow battery positive electrode material has chemical stability, efficient bromine adsorption capacity and excellent catalytic activity.

The invention relates to a low-temperature-resistant epoxy resin adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The modified epoxy resin adhesive comprises the following components in parts by weight: 90-120 parts of epoxy resin, 8-24 parts of a curing agent, 1-3 parts of a diluent, 0.5-5 parts of a curing accelerator, 4-18 parts of graphite, 1-4 parts of a hyperbranched polymerization flexibilizer and 10-30 parts of conductive filler, polyimide in the hyperbranched polymerization flexibilizer is difficult to crystallize, has no interchain winding, and cooperates with a flexible Si-O-Si chain segment with high bond energy and large bond angle to enhance low-temperature tensile strength and toughness, and chloroprene rubber effectively improves impact resistance and bending resistance; according to the low-temperature-resistant epoxy resin adhesive disclosed by the invention, a conductive network is constructed by indium tin oxide, good conductivity and chemical corrosion resistance are given to a matrix, a polyaniline layer is used for modifying a structural body and enhancing interface adhesion, and the prepared low-temperature-resistant epoxy resin adhesive not only has good low-temperature-resistant toughening and conductive effects, but also has excellent corrosion-resistant and flame-retardant effects.

The invention discloses a double-response collagen-based conductive hydrogel, a medicine and a preparation and application method of the double-response collagen-based conductive hydrogel. The preparation method of the double-response collagen-based conductive hydrogel comprises the following steps: carrying out chemical modification on polysaccharide through 3-aminophenylboronic acid, and then carrying out sodium periodate oxidation treatment to obtain a dialdehyde polysaccharide grafted aminophenylboronic acid copolymer; the preparation method comprises the following steps: performing hydrazide modification on collagen through adipic acid dihydrazide, and performing free radical polymerization with aniline to obtain a hydrazide collagen grafted polyaniline copolymer; the dialdehyde polysaccharide grafted aminophenylboronic acid copolymer and the hydrazide collagen grafted polyaniline copolymer are subjected to crosslinking, and the double-response collagen-based conductive hydrogel capable of responding to glucose and the pH value is obtained. Compared with single-response conductive hydrogel, the hydrogel can specifically respond to the microenvironment of chronic diabetic wound surfaces and release antibacterial and anti-inflammatory drugs, and high-quality healing of chronic wounds such as diabetic foot ulcers and the like is promoted.

The invention relates to the technical field of functional fabrics, in particular to an electromagnetic shielding flame-retardant fabric and a preparation method thereof. The preparation method comprises the following steps: S1, mixing an activated phosphate ester solution with polyaniline for reaction, and then adding a cross-linking agent for reaction to obtain a composite grafting agent; s2, the Ti < 3 > C < 2 > T < x > and the composite grafting agent are subjected to a reaction, and multifunctional grafting modified Ti < 3 > C < 2 > T < x > is obtained; and S3, immersing a polyester fabric into a dispersion liquid containing the multifunctional grafting modified Ti3C2Tx, and drying to obtain the electromagnetic shielding flame-retardant fabric. According to the preparation method, Ti3C2Tx is subjected to multifunctional grafting modification by adopting a halogen-free flame retardant and a water-based process, and the Ti3C2Tx is combined with triethyl phosphate and polyaniline to prepare the composite material with dual functions of electromagnetic shielding and flame retardance. The composite material is adopted to modify polyester fabric, and fabric with efficient electromagnetic shielding and flame retardant functions and high mechanical strength can be prepared.

The invention relates to the field of MOF-based flexible thermoelectric materials, and discloses n-type MOF-based high-performance thermoelectric foam with ductility and a preparation method and application thereof, and the method comprises the following steps: dissolving 1, 3, 5-trimesic acid and copper acetate in a mixed solution of N, N-dimethylformamide, ethanol and deionized water to prepare a precursor solution; soaking foamed nickel in the precursor solution for hydrothermal reaction, then taking out, cleaning and drying to obtain a foamed nickel material with nickel-copper MOF uniformly grown on the surface; and soaking the foamed nickel material in a mixed solution of polyaniline and DMF (Dimethyl Formamide) so as to graft a conductive polymer on the surface and pore channels of the nickel-copper MOF, thereby obtaining the high-performance thermoelectric foam with ductility. The n-type MOF-based thermoelectric foam prepared by the invention has excellent ductility and thermoelectric performance, and also has the characteristics of metal plasticity, efficient thermoelectric performance and sensitivity to temperature change. The excellent thermoelectric performance and wide application scene of the material are far better than those of the currently reported n-type MOF-based thermoelectric material.

The invention discloses a method for improving photo-thermal conversion efficiency of a photo-thermal material under large-range light intensity, the photo-thermal material and a solar heat collector, and belongs to the field of solar evaporation water treatment. According to the technical scheme, the method comprises the steps that polyaniline particle-loaded carbon aerogel is prepared, the light intensity range is greatly widened to 10 sunlight intensities or above through a Fresnel lens, the corresponding relation between the material surface water evaporation rate and the temperature change is established, and the energy loss is reduced to the maximum extent by adding a foam side heat insulation layer; and the water evaporation rate of the photo-thermal material is improved. The method is applied to the aspect of solar water evaporation, and the problem that the water evaporation rate is low in an existing solar evaporation method is solved.

The invention relates to a shape memory polyimide composite material with a spider-silk-like microstructure and a preparation method and application thereof. According to the method, the composite material is designed by coupling the spider-silk-like microstructure, shape memory polyimide, a flame retardant and an electromagnetic shielding two-dimensional intercalation compound. Conductive polyaniline and transition metal carbon / nitride are subjected to an intercalation reaction to prepare a Ti3C2Tx-coated PANI intercalation compound, then the Ti3C2Tx-coated PANI intercalation compound is compounded with SMPI to serve as a spider-silk-like microstructure to enhance the mechanical strength and electromagnetic shielding performance of a resin matrix, and when the thickness of the SMPI composite material is 100 micrometers, the electromagnetic shielding effectiveness of the SMPI composite material in the X wave band exceeds 25 dB, and 99% or above of incident microwaves are effectively shielded. In addition, the flame retardant grade of the composite material reaches V0 grade, the limit oxygen index is 39.1%, the composite material also has high temperature resistance and shape memory characteristics, the shape fixation rate is 96%, and the shape recovery rate is 97%. The composite material not only can eliminate electromagnetic interference, but also can resist flame, can be automatically deformed, and is applied to the fields of self-adaptive deformation thermal management electromagnetic shielding devices, intelligent wearable equipment and the like.

The invention provides a preparation method and application of nitrogen-doped activated carbon for a ruthenium catalyst carrier, and the preparation method comprises the following steps: carrying out in-situ polymerization on aniline on the surface of nanocellulose by adopting an oxidative polymerization method to generate polyaniline, so as to obtain polyaniline-coated nanocellulose; the preparation method comprises the following steps: reacting phenol, an aminophenol derivative and a formaldehyde solution serving as raw materials under the action of a base catalyst to obtain modified A-stage phenolic resin; and uniformly mixing the polyaniline-coated nano cellulose with the modified resol, curing, crushing, carbonizing, activating, graphitizing, grinding and sieving to obtain the nitrogen-doped carrier activated carbon. The nanocellulose contains carbon, hydrogen and oxygen elements, gas can be generated in the preparation process of the activated carbon, and the pore structure of the activated carbon is expanded along with gas escape; a nitrogen-doped activated carbon pore wall is generated in situ by polyaniline around the occupation space of the nanocellulose, and the nitrogen element is beneficial to adjusting the size of active metal ruthenium particles and improving the activity and stability of the ammonia synthesis supported ruthenium catalyst prepared from the nitrogen-doped activated carbon pore wall.

The preparation method comprises the following steps: mixing a polyurethane prepolymer and a modified filler, adding the mixture into a twin-screw extruder, carrying out extrusion granulation to prepare the antistatic master batch, and carrying out melt extrusion on the polyurethane prepolymer and the modified filler in the melt extrusion process of the polyurethane prepolymer and the modified filler to prepare the antistatic master batch. When the polyurethane prepolymer reacts with hydroxyl on the surface of the modified filler, the modified filler can be uniformly dispersed among polyurethane molecular chain segments, the surface of the modified filler contains polyaniline chain segments and quaternary ammonium salt structures, a large number of conjugated pi electrons are contained on the main chain of polyaniline molecules, and the conjugated pi electrons can be dispersed among the polyurethane molecular chain segments. Pi electrons can freely move in a conjugated system to generate a delocalization effect, so that polyaniline has conductivity, a conductive path is further formed in the material, quaternary ammonium salt can neutralize charges carried by the polyurethane material, an antistatic effect is further achieved, and due to the addition of a polysiloxane chain segment, the antistatic property of the polyurethane material is improved. And the antistatic effect of the material is not reduced in a high-temperature environment.

The invention relates to the technical field of functional composite probe material preparation, in particular to a three-core spinning technology-based bio-compatible gel probe and a preparation method thereof, and the three-core spinning technology-based bio-compatible gel probe comprises a composite skin layer and three functional core layers; the composite skin layer is composed of a sodium alginate-polydopamine-chitosan grafted copolymer in a mass ratio of 2: 1: 0.5, and contains # imgabs 0 # chondroitin sulfate and # imgabs 1 # polyoxyethylene; the three core layers are respectively a carbon nanotube-polyaniline # imgabs2 # hybrid material, a graphene-polypyrrole-boron nitride hybrid material and a # imgabs3 # polythiophene-hydroxyapatite hybrid material, and the mass ratio of the carbon material to the conductive polymer to the newly added nano material in each core layer is 1: 2: 0.3; and the diameter ratio of the skin layer to the three core layers is 1: 0.28: 0.22: 0.17. According to the invention, multichannel signal transmission is realized, the impedance is reduced by the hybrid material, and the conductivity is improved; the composite skin layer is matched with soft tissue mechanical properties, and interface bonding is stable; and the biocompatible component reduces inflammation, is suitable for acquiring nerve electrophysiological signals, and is easy for large-scale production.

The invention provides a preparation method and application of coating enhanced nano silver powder. The preparation method comprises the following steps: S1, preparing nano silver by taking silver nitrate as a silver source and polyethyleneimine as a reducing agent; s2, carrying out coating modification on the nano-silver by adopting aniline and ammonium persulfate under an acidic condition; s3, modifying the polyaniline coated nano-silver by adopting chloroacetic acid to obtain chloroacetic acid modified polyaniline coated nano-silver; s4, preparing a modified graphene oxide dispersion liquid; s5, partially reducing the graphene oxide; s6, partially reduced graphene oxide is adopted to load the chloroacetic acid modified polyaniline coated nano-silver, polyaniline coating and reduced graphene oxide compounding are carried out, and the dispersity and stability of nano-silver particles are effectively improved. The oxidation state of polyaniline promotes the release of silver ions through an electron transfer effect, so that the antibacterial effect is enhanced; and the partially reduced graphene oxide synergistically accelerates the release of silver ions, so that the antibacterial property is further improved.

The invention provides a diaphragm and a preparation method thereof, and a lithium ion battery, the diaphragm comprises a base membrane, a composite ceramic coating and an interface layer, the composite ceramic coating contains inorganic ceramic particles and organic microcapsule particles, the organic microcapsule particles comprise a core material with a melting point range of 55-65 DEG C and a polymer shell coating the surface of the core material, and the polymer shell is coated on the surface of the core material. The polymer shell is selected from at least one of polyurethane, polyurea, polyamide and polycarbonate, the interface layer is formed by depositing an interface modification polymer on the surface of the composite ceramic coating, and the interface modification polymer is selected from at least one of polycatechol derivatives, polyaniline, polyvinyl pyridine, polyacrylic acid and polyacrylamide. The core material in the organic microcapsule particles is melted when heated to trigger hole closing at the initial stage of thermal runaway at 60-80 DEG C, the hole closing rate can reach 92%, the hole closing response time is shortened by 30%, and the porous structure of the interface layer can enhance the liquid absorption rate.

The invention discloses a sodium ion positive electrode material and a failure re-repairing method thereof.The failure re-repairing method of the sodium ion positive electrode material is used for re-repairing the sodium ion positive electrode material which fails due to exposure to a wet environment and comprises the following steps that S1, the failed sodium ion positive electrode material is washed with absolute ethyl alcohol and then subjected to vacuum drying, and the sodium ion positive electrode material is obtained; the pretreated layered oxygen positive electrode material is obtained; s2, preparing a repairing solvent, wherein the repairing solvent is prepared by dissolving hydrochloric acid modified polyaniline and multi-walled carbon nanotubes in N-methyl pyrrolidone; s3, dissolving the layered oxygen positive electrode material in a repairing solvent, and stirring to obtain a sodium ion positive electrode material to be dried; and S4, carrying out vacuum drying on the sodium ion positive electrode material to be dried, and cooling to obtain the repaired layered oxide positive electrode material. The method can effectively remove moisture and impurities on the surface of the failed material, recover the basic performance, and improve the stability of the repaired material structure, the specific capacity of current discharge and the cycle performance of the material.

The invention relates to the technical field of lithium batteries, in particular to a preparation method of a high-temperature-resistant lithium battery cell. The invention discloses a preparation method of a high-temperature-resistant lithium battery cell, which is characterized in that through full-chain synergy of modification of positive and negative electrode materials, electrolyte optimization and structural design, a positive electrode adopts nickel cobalt lithium aluminate with a core-shell structure, and a metal organic framework coordination layer, polyaniline-polyacrylic acid multilayer coating and foam aluminum foil 3D printing coating are combined. The negative electrode takes silicon-carbon core-shell particles as a substrate, and breaks through the expansion bottleneck of a silicon-based negative electrode through metal organic framework confinement coating, polyaniline-polyacrylic acid cross-linked network modification and foam copper foil functionalization. The electrolyte adopts a film-forming additive and lithium difluorophosphate to form a stable SEI film, and internal resistance increase at high temperature is inhibited. The aramid fiber coating diaphragm and the aluminum alloy shell are matched, so that the thermal stability of the battery cell is remarkably improved, the battery cell can stably work in a wide temperature range environment, high energy density and long cycle life are comprehensively realized, and key support is provided for a long-endurance and high-safety battery.

The invention discloses a preparation method and application of a zinc-bromine flow battery positive electrode material, and belongs to the field of zinc-bromine flow batteries. The preparation method comprises the following steps: firstly, cleaning and activating a carbon-based three-dimensional conductive network substrate by adopting plasmas, performing oxygen / argon plasma etching, and performing chemical vapor deposition on carbon to prepare three-dimensional porous carbon; then growing a metal oxide nanocrystalline array on the three-dimensional porous carbon by a hydrothermal method, and carrying out ammonia gas calcination to convert the metal oxide nanocrystalline array into a metal nitride nanocrystalline array; then preparing an electro-deposition solution containing tin bismuth salt and an aniline-bromine source polymerization solution, and constructing Sn-Bi bimetallic nanoparticles and a polyaniline-bromine complex layer on the metal nitride nanocrystalline array / three-dimensional porous carbon precursor through electro-deposition and electro-polymerization in sequence to finally prepare the high-performance zinc-bromine battery positive electrode material. The positive electrode material has high conductivity, excellent Br2 / Br <-> catalytic activity and structural stability, and the coulombic efficiency, the voltage efficiency and the energy efficiency of the battery are remarkably improved.

The invention relates to the technical field of composite materials, in particular to a high-conductivity thermosetting resin-based composite material and a preparation method thereof.The high-conductivity thermosetting resin-based composite material is prepared from, by weight, 50-80 parts of epoxy resin, 10-30 parts of conductive carbon nanotubes, 20-40 parts of nano-silver particles, 10-20 parts of functionalized polyurethane prepolymer, 5-15 parts of polyamine curing agent and 2-8 parts of organosilane coupling agent. 5-15 parts of graphene nanosheets, 5-15 parts of aluminum borate whiskers and 5-15 parts of barium titanate nanoparticles; 2-10 parts of conductive polymer microspheres; 1 to 5 parts of nano zinc oxide; wherein the conductive polymer microsphere comprises a core formed by polyaniline or polypyrrole, and a polyurethane polymer or a polyacrylate polymer wrapping the outer layer of the core; the surface of the core is modified by adopting nano silver particles and gamma-aminopropyltriethoxysilane; the conductive polymer microspheres are used for providing a long-range conductive path, the nano-silver particles are used for providing short-range conductive connection, and the conductive polymer microspheres and the nano-silver particles form a multi-layer conductive network.