35results about How to "Avoid chalking" patented technology

The invention discloses efficient closed-pore high-stability slurry and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of lithium batteries, the efficient closed-pore high-stability slurry comprises water, core-shell microspheres, a heat stabilizer, a wetting auxiliary agent and a dispersing auxiliary agent, the core-shell microspheres comprise first core-shell particles and second core-shell particles, the core of the first core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the heat conducting agents, and the shell of the first core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive accelerators; the core of the second core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the flame retardants, and the shell of the second core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive main agents. The material has the advantages of early quick and synchronous response to temperature change, excellent thermal stability and excellent flame retardancy.

This invention discloses a dual-mode synergistic composite photocatalyst, its preparation method, and its application in styrene-acrylic emulsion coating compositions, belonging to the field of architectural coating technology. The dual-mode synergistic composite photocatalyst possesses a TiO2@dense SiO2@mesoporous SiO2-MnO2-GQDs three-layer core-shell structure. The styrene-acrylic emulsion coating provided by this invention utilizes the aforementioned dual-mode synergistic composite photocatalyst, and innovatively employs a yellowing-resistant composition composed of hollow titanium dioxide-supported phenyltriazole particles, a sulfonic acid-grafted hindered amine light stabilizer, and nano-zinc oxide. This composition synergistically inhibits yellowing of the paint film through enhanced UV absorption and improved interfacial compatibility. The styrene-acrylic emulsion coating provided by this invention successfully solves the two major problems of traditional photocatalytic coatings: "purification depends on light" and "self-catalysis leads to yellowing of the paint film." It can efficiently degrade formaldehyde under both light and dark conditions and exhibits excellent yellowing resistance.

The invention provides a lithium manganate positive electrode material and a preparation method thereof, a positive plate and a battery, and belongs to the technical field of batteries, the structural general formula of the lithium manganate positive electrode material is Li1 + xMyMn2-(x + y) O4, x is greater than or equal to 0.1 and less than or equal to 0.33, y is greater than or equal to 0.005 and less than or equal to 0.01, M comprises at least one of Co, Ni, Cr and Fe, and the 111 crystal face diffraction peak intensity I111 of the lithium manganate positive electrode material is greater than 3100. According to the lithium manganate positive electrode material, the energy density, the effective gram volume and the structural stability of the lithium manganate positive electrode material, especially the performance of the lithium manganate positive electrode material in a low-voltage range of 2.0-3.3 V, are improved through lithium enrichment, doping of a proper proportion of M elements and synergistic cooperation of 111 crystal face diffraction peak intensity of the lithium manganate positive electrode material, so that the energy density, the effective gram volume and the cycling stability of the battery are improved, and the battery performance is improved. The battery service life is prolonged.

The invention belongs to the technical field of solid-state batteries, and discloses an alloy ion / electron mixed conductor and application thereof. The mixed conductor is prepared by taking antimony powder, lithium powder or sodium powder and at least one metal powder of lanthanum, scandium, yttrium, aluminum, gallium and indium as raw materials through ball-milling mixing, tube sealing annealing and quenching treatment. When the mixed conductor is used as an interlayer of a lithium / sodium metal negative electrode and an electrolyte in the solid-state battery, the growth of lithium / sodium dendrites can be effectively inhibited through a specific nucleation mechanism, and the utilization rate of the metal negative electrode is improved; when the conductive additive is used as a conductive additive of a silicon, red phosphorus or graphite / hard carbon negative electrode material, by virtue of high ion / electron conductivity and good potential stability, the interface side reaction is reduced, and the rate capability and the cycling stability of the negative electrode material are remarkably improved.

The invention relates to the technical field of electrochemical energy storage materials and preparation, and discloses a forestry and agricultural residue-based carbon material and application thereof in a zinc ion battery, the forestry and agricultural residue-based carbon material is prepared by taking forestry and agricultural residues as raw materials through cellulose extraction, three-dimensional skeleton construction through aerogel, high-temperature carbonization, potassium hydroxide activation pore-forming and electrochemical surface modification. The obtained carbon material has a three-dimensional hierarchical connected network structure composed of micropores, mesopores and macropores, and the surface of the carbon material is rich in oxygen-containing zinc-loving sites for inducing uniform deposition of zinc. When being used as a zinc-free negative electrode carrier of a zinc ion battery, the hierarchical pore structure effectively reduces local current density and buffers deposition volume expansion, and surface zinc-loving sites obviously reduce nucleation overpotential. Through cooperative regulation and control of a physical structure and surface chemistry, zinc dendrite growth and hydrogen evolution side reaction are effectively inhibited, coulombic efficiency, long cycle stability and rate capability of the battery are greatly improved, the process is controllable, and the cost is low.

This invention relates to the field of battery technology, and in particular to a modified negative electrode, a full cell, and a preparation method thereof. The modified negative electrode includes a negative electrode and a ceramic layer coated on the surface of the negative electrode; the ceramic layer includes a fast ion conductor, ceramic particles, and a binder. The ceramic layer of this invention employs a composition of a fast ion conductor, hollow ceramic particles, and a binder. The hollow ceramic particles provide mechanical strength and buffer space, the fast ion conductor provides an ultrafast lithium-ion transport channel, and the composite ceramic layer, incorporating the fast ion conductor and ceramic particles, provides the core requirements for stable mechanical support, stress buffering, and ion conduction at the silicon-doped negative electrode interface. This significantly improves the effectiveness of reducing interface wrinkles on the negative electrode sheet after formation, maintaining the integrity of the electrode structure between the coating and the current collector, and the active material particles.

The application discloses a kind of quasi-solid electrolyte systems containing two-dimensional fluorophlogopite nanosheet and its application in secondary battery.The quasi-solid electrolyte system has the mass fraction of 0.005% to 0.1% of exfoliated fluorophlogopite nanosheet dispersed in liquid base electrolyte, and cooperates with the use of separator coated with a composite coating containing the nanosheet.The nanosheet forms a thixotropic gel network with cations in the electrolyte through electrostatic interaction and coordination adsorption, migrates to the electrode microcrack through microscale convection during charging and discharging to produce bridging effect to inhibit volume expansion, while the separator coating uses the high aspect ratio of nanosheet to block metal dendrite penetration.The application is suitable for lithium ion batteries and sodium ion batteries, compatible with a variety of positive and negative electrode materials, significantly improves the cycle life, high voltage stability and safety performance.

This application relates to the field of all-solid-state lithium battery technology, disclosing an adhesive composition, electrode sheet, and all-solid-state battery for all-solid-state batteries. The composition includes 0.5-5.0 parts of a modified polymer adhesive and 95.0-99.5 parts of a non-polar organic solvent. The modified polymer has a hydrocarbon backbone and side chains containing 0.5-15.0 mol% nitrile or ester groups. The electrode sheet of this invention contains only 0.5-3.0 wt% adhesive and is prepared using a high-pressure hot-pressing process at 300-1000 MPa, resulting in a point-contact distribution of the adhesive at the microscopic level. This invention resolves the contradiction between adhesive solubility and the chemical stability of the sulfide electrolyte, achieving high peel strength and low interfacial resistance of the electrode with extremely low adhesive content. This effectively buffers the volume expansion of the active material, improving the cycle life, low-temperature performance, and rate performance of the all-solid-state battery.

The invention discloses an industrial waste gas VOCs adsorption device which comprises an adsorption barrel, a gas inlet pipe is arranged at the bottom end of the adsorption barrel in a penetrating mode, an exhaust pipe is arranged at the top end of the adsorption barrel in a penetrating mode, the gas inlet pipe and the exhaust pipe are symmetrically distributed, an adsorption part is arranged in the adsorption barrel, and a vibration part for pushing an adsorption part body to shake up and down is arranged in the adsorption barrel. The vibration part is arranged below the adsorption part, an activation part for accumulating gas entering the adsorption barrel from the gas inlet pipe and driving the vibration part to rotate through gas pressure is arranged in the adsorption barrel, and the activation part is arranged below the vibration part; the adsorption bed can slide up and down and collide and vibrate through the adsorption part, an airflow dead zone in the adsorption bed is effectively avoided, a granular adsorption material is prevented from forming a bridging structure due to extrusion, full contact of the adsorption material and VOCs waste gas is ensured, the effective utilization rate of an adsorbent and the purification efficiency of the device are improved, and the service life of the device is prolonged. Meanwhile, the outer frame of the adsorption bed abuts against the inner wall of the adsorption barrel, waste gas short circuit is avoided, and the purification effect is further guaranteed.

The invention discloses a recyclable valve-regulated lead-acid storage battery, lead paste and a preparation method of the lead paste, and relates to the field of lead-acid storage batteries. The lead paste comprises positive lead paste and negative lead paste which both contain short fibers compositely modified by carboxylic acid and silane monomers, and key components such as stannous oxide, zinc oxide, carbon black and lignin are added. The modified short fiber has the functions of acid affinity and storage, sulfuric acid conduction and structure enhancement, and has a synergistic effect with each component, so that the conductivity, the structural stability and the reaction activity of the lead plaster are remarkably improved, and the problems of reduced charging acceptance, quick capacity fading and short cycle life of the existing lead-calcium alloy storage battery are solved. The method is suitable for power cycle use scenes such as electric bicycles and electric tricycles, the cycle life of the storage battery can be prolonged, and the capacity stability is improved.

This invention belongs to the field of coating technology and provides a wear-resistant coating for drone shells and its preparation method. The raw materials of the coating include: hydrogenated bisphenol A epoxy resin, vinyl-terminated fluorinated polybutadiene resin, core-shell powder, aluminum borate nanofibers, polyetherimide micro powder, wear-resistant additives, silane coupling agent KH-792, light stabilizer, leveling agent and environmentally friendly solvent. The preparation method includes: (1) mixing hydrogenated bisphenol A epoxy resin and vinyl-terminated fluorinated polybutadiene resin to form a resin matrix; (2) first adding core-shell powder and aluminum borate nanofibers to the resin matrix for dispersion; after cooling to 25-30℃, adding other raw materials, stirring and defoaming to obtain the finished product. This coating has high wear resistance, wind and sand erosion resistance, low temperature crack resistance, microcrack self-repair, strong UV aging resistance and high adhesion, which can significantly improve the long-term service stability and service life of drone shells in complex and harsh environments such as high altitude, wind and sand, high and low temperature alternation, and strong ultraviolet radiation.

This application provides a silicon anode, its preparation method, and a sulfide solid-state battery, relating to the field of solid-state battery technology. A method for preparing a silicon anode involves mixing a silicon-based material, a conductive additive, a first polymer, and a first solvent to obtain an electrospinning precursor solution; electrospinning the precursor solution to form a fiber film on one side of a receiving substrate; sintering to obtain a silicon anode precursor; mixing a sulfide solid electrolyte, a second polymer, and a second solvent to obtain an electrolyte composite slurry; coating the slurry onto the surface of the silicon anode precursor to obtain a silicon anode; the total amount of the silicon-based material, conductive additive, and first polymer is 100%, with the silicon-based material comprising 60%–80%, the conductive additive 10%–20%, and the first polymer 10%–20%; the total amount of the sulfide solid electrolyte and the second polymer is 100%, with the sulfide solid electrolyte comprising 70%–90% and the second polymer 10%–30%. This application improves the ionic and electronic conductivity of the silicon anode and alleviates the volume expansion of the silicon anode.

The application discloses a kind of supercapacitor negative high-efficiency composite electrode and preparation method thereof, including the block body iron of substrate and the outer layer PrNi x Fe 1‑x O3 conductive active layer, and Fe2O3 active layer between the two, by wet chemical etching and transient high temperature joule heat method in-situ synthesis active layer, and further utilize wet chemical brush coating and transient high temperature joule heat method in-situ synthesis conductive active layer, two are asymmetric sandwich structure, it is favorable to build charge transport path, improve charge transport efficiency, at the same time, can effectively relieve the volume change generated in the process of charge and discharge of iron oxide, unlike the characteristics of particle composite structure easy to collapse, inhibit the occurrence of electrode material pulverization, wherein, using transient high temperature joule heat preparation technology, layered in-situ build heterostructure, not only simple and fast, also make the structure compact and dense, maintain the stability of overall electrode structure, improve the long-period cycle charge and discharge capacity of electrode.

This invention discloses a foamed aluminum electrode foil for aluminum electrolytic capacitors and its preparation method, belonging to the technical field of aluminum electrolytic capacitors. The preparation method of the foamed aluminum electrode foil includes the following steps: preparing an aluminum powder slurry, uniformly coating it onto the surface of a pretreated foamed aluminum foil, and then drying and step-by-step sintering to form a strong metallurgical bond between the aluminum powder particles and between the aluminum powder particles and the foamed aluminum matrix, thus obtaining the electrode foil. This invention utilizes the inherent three-dimensional porous structure of foamed aluminum to obtain an ultra-high specific surface area, while simultaneously constructing a highly efficient three-dimensional conductive network through a dense aluminum layer on the surface, significantly enhancing the mechanical strength of the foil. The resulting electrode foil possesses high specific capacitance, low equivalent series resistance, high mechanical strength, and good processability, providing a key material foundation for the preparation of next-generation high-performance, high-capacity, low-ESR aluminum electrolytic capacitors.

The invention relates to the technical field of batteries, in particular to an all-solid-state battery and a preparation method thereof.The all-solid-state battery comprises a positive plate, a negative plate and a solid electrolyte layer located between the positive plate and the negative plate; the negative plate comprises a negative current collector and a negative layer positioned on at least one side surface of the negative current collector; the positive plate comprises a positive current collector and a positive layer positioned on at least one side surface of the positive current collector; the functional surface on one side of the solid electrolyte layer is combined with the positive electrode layer to form an integrated structure, and the functional surface on the other side of the solid electrolyte layer is combined with the negative electrode layer to form an integrated structure; the negative electrode layer comprises nano silver powder, and the nano silver powder has a honeycomb hollow structure; the solid electrolyte layer includes an oxide electrolyte. According to the all-solid-state battery, the interface impedance is greatly reduced, the rate capability of the battery is improved, the all-solid-state battery can adapt to the volume change of the pole piece in circulation, and the cycle life of the battery is prolonged.

The invention discloses a binder for a positive pole piece as well as a preparation method and application of the binder. The adhesive comprises a rigid framework component, a flexible link component and an interface anchoring component, and is a composite adhesive system with a three-dimensional network structure. The preparation method comprises the following steps: uniformly dispersing the rigid framework component in water, sequentially adding the flexible linking component and the interface anchoring component, and uniformly mixing to obtain the adhesive. The binder can be applied to the Prussian blue type positive pole piece, the Prussian blue type positive pole piece comprises a current collector and an active substance layer coated on at least one side surface of the current collector, and the active substance layer comprises a Prussian blue type positive pole material, a conductive agent and the binder. The binder provided by the invention solves the problems of low peeling strength, poor flexibility, easy layering during baking and the like of the Prussian blue positive pole piece, and the prepared positive pole piece has excellent mechanical properties and electrochemical properties, and is suitable for the field of sodium ion batteries.

The invention discloses an anti-aging power cable, and belongs to the technical field of power cables. The cable sequentially comprises a conductor, an insulating layer, a metal shielding layer and an outer sheath layer from inside to outside. Wherein the outer sheath layer is made of a POE composite material and comprises the following raw materials in parts by weight: 65-75 parts of POE, 15-20 parts of high-density polyethylene, 10-15 parts of a flame retardant, 4-6 parts of chopped aramid fibers, 1-2 parts of an anti-aging auxiliary agent, 2-4 parts of a light protection auxiliary agent and 0.5-1.5 parts of a processing auxiliary agent. Wherein the light protection auxiliary agent has the effects of widening the ultraviolet absorption range and enhancing the mechanical property. The prepared cable has excellent bending resistance, dragging resistance, rolling resistance, ultraviolet aging resistance and thermo-oxidative aging resistance, and is especially suitable for mobile electrical connection occasions such as charging piles, the service life of the cable is remarkably prolonged, and the safety and reliability of the cable are remarkably improved.

The invention belongs to the technical field of surface modification of positive electrode materials of lithium ion batteries, and relates to an oxygen capture and thermal stability compound coating for a positive electrode material and application thereof, the oxygen capture and thermal stability compound coating comprises positive electrode active material particles and a compound functional coating covering the surfaces of the positive electrode active material particles, and rare earth elements comprise at least one of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; the transition metal element comprises at least one of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co and Ni; the thickness of the composite functional coating ranges from 1 nm to 200 nm. The double functions of oxygen capture and thermal barrier are achieved through the composite functional coating; lattice oxygen release of the positive electrode material in a high-voltage and high-temperature environment can be remarkably inhibited, the side reaction of an electrolyte or solid electrolyte interface is reduced, the cycle life is prolonged, and the safety performance is improved.

The utility model discloses a special fertilizer production device for potatoes, which is characterized in that discharge ports of an industrial monoammonium metering belt conveyor, a potassium sulfate metering belt conveyor, an ammonium nitrate phosphorus metering belt conveyor and a trace element metering belt conveyor are respectively communicated with a feed port of a mixing tank, and a discharge port of the mixing tank is communicated with a roller granulator through a pipeline; a discharging port of the roller granulator is communicated with the fluidized bed dryer through a pipeline, a discharging port of the fluidized bed dryer is communicated with a feeding port of the powder flow cooler through a pipeline, and a discharging port in the bottom of the powder flow cooler is sequentially communicated with the particle shaper and the coating machine through pipelines. According to the utility model, zinc and manganese microelements for promoting potato growth can be uniformly added, the purpose of fertilizer efficiency improvement is achieved, and meanwhile, the powder flow cooling technology is applied, so that the device can stably operate for a long period, and the production effect is good.

The invention provides a silicon-carbon negative electrode material and a preparation method thereof, and relates to the technical field of battery manufacturing. The silicon-carbon negative electrode material comprises porous carbon, nano silicon and a nano carbon layer, at least part of the nano silicon is distributed in pores of the porous carbon; at least part of the surface of the porous carbon is covered by the nanocarbon layer; and the half-peak width FWHM of the diffraction peak of the porous carbon at 16-26 degrees in an X-ray diffraction pattern is less than 12. The high-crystallinity porous carbon carrier with the FWHM smaller than 12 is utilized, the mechanical strength of a framework is remarkably enhanced, the volume expansion of nano silicon can be effectively bound, the structural integrity is maintained, and the expansion rate of the pole piece is reduced by matching with carbon layer coating, so that the cycle life of the battery is greatly prolonged.

This invention relates to a lithium iron phosphate composite electrode material and its preparation method, belonging to the field of electrode material technology. The preparation method of this invention significantly improves the electrochemical performance of the material through a wet-mixing precursor, modified carbon nanotube composite, and double-layer carbon coating process. The modified carbon nanotubes are treated with melamine, potassium hydroxide, and boric acid to achieve nitrogen / boron co-doping and surface functionalization, constructing efficient electron transport channels and shortening the lithium-ion diffusion path through a microporous structure; their high aspect ratio and improved graphitization effectively alleviate charge-discharge volume expansion and ensure high-temperature structural stability. The double-layer carbon coating consists of a polydopamine inner layer and a glucose-derived carbon outer layer. The inner layer strengthens the interface bonding through chemical bonding and guides uniform lithium-ion diffusion, while the highly conductive outer carbon layer provides a fast electron transport channel and mechanical protection, synergistically optimizing ion / electron transport efficiency.

This invention discloses a surface coating modification process for fast-charging graphite anode materials, belonging to the field of surface coating modification of graphite anode materials. The process includes the following steps: Graphite pretreatment: Natural spherical graphite or artificial graphite is selected as raw material and ball-milled for 3-8 hours. An appropriate amount of dispersant can be added to prevent graphite particle agglomeration. The ball-milled graphite particles are then acid-washed using a 10%-30% hydrochloric acid or sulfuric acid solution. This invention effectively removes impurities and defects from the graphite surface and increases the specific surface area and surface active sites of the graphite particles by precisely controlling the graphite pretreatment conditions, such as appropriate ball-milling time, acid concentration, and temperature. Simultaneously, a gradient coating structure is adopted, with multiple coatings using phenolic resin ethanol solutions of different mass fractions. Combined with conductive additives such as carbon nanotubes and graphene, as well as the introduction of metal salts, a more complete conductive network is constructed.

The invention discloses a binder-free transition metal sulfide composite nitrogen-doped graphene negative electrode material and a preparation method thereof, and belongs to the technical field of secondary battery negative electrode materials. According to the technical scheme, the preparation method comprises the following steps: 1) dissolving zinc nitrate, cobalt nitrate and nitrogen-doped graphene in a mixed solution of ethanol and water, uniformly mixing, adding ammonium fluoride and urea, and continuously stirring; 2) adding foamed nickel and the uniformly mixed solution into a high-pressure reaction kettle for hydrothermal treatment, cooling, washing and drying to obtain a Zn-Co-precursor; (3) calcining the Zn-Co-precursor in an inert atmosphere, and (4) adding the Zn-Co-precursor into a high-pressure reaction kettle containing a sulfur source for hydrothermal vulcanization treatment, washing and drying to obtain the ZnCo2S4-coated NGr / NF negative electrode material.The graphene negative electrode material can improve the overall performance and stability of a secondary battery.

The invention discloses a PAA-based conductive binder for a silicon-based negative electrode of a lithium ion battery and a preparation method of the PAA-based conductive binder, and belongs to the technical field of lithium batteries. The method comprises the following steps: respectively dissolving polyacrylic acid and ferric citrate in deionized water to prepare a PAA aqueous solution and a ferric citrate aqueous solution; and adjusting the pH value of the PAA solution by using ammonia water. And dropwise adding the ferric citrate aqueous solution into the PAA aqueous solution to form a PAA-FeCA cross-linked network with incompletely dissociated Fe < 3 + >, thereby obtaining the PAA-based conductive binder for the silicon-based negative electrode of the lithium ion battery. The carboxylated carbon nanotubes can be further added into the PAA-based conductive binder for the silicon-based negative electrode of the lithium ion battery. The lithium ion battery binder has good conductivity, and a binder network effectively buffers volume expansion of silicon, so that a silicon negative electrode shows good cycle performance and rate capability, and the lithium ion battery binder has good application prospects in lithium ion battery silicon-based materials.

This utility model discloses a structure for enhancing the compressive strength of high-sulfur ore pellets, relating to the field of high-sulfur ore pellet technology. It includes a first protective shell, with a second protective shell located on the right side of the first protective shell. Handles are fixedly connected to the outer walls of both the first and second protective shells. Several first springs are fixedly connected to the inside of each of the first and second protective shells. By setting the first and second protective shells outside the pellet and configuring protective covers and elastic plates inside, a multi-layered buffer structure is formed. When the pellet is subjected to external force, the first springs and elastic plates can effectively absorb and disperse the impact force, preventing the pellet from breaking or pulverizing due to collision or compression, thereby significantly improving the compressive strength of the pellet. The eight protective covers and elastic plates are evenly distributed in a spherical shape, providing all-round protection for the pellet and ensuring a stable buffering effect in all directions.

The application relates to the technical field of new energy materials, and discloses a yolk-shell structure cobalt-vanadium sulfide@ hollow carbon nanospheres and a preparation method thereof. 1.097 The CoS 1.097 / V7S8 composite sulfide is a yolk, the hollow carbon sphere is a shell, and a reserved buffer gap is constructed between the yolk and the shell. The target material is prepared through a template mediation process, a carbon layer coating process, a cobalt-vanadium sulfide precursor loading process, a hydrothermal sulfidation process, an etching process and a post-processing process. The yolk-shell structure cobalt-vanadium sulfide@ hollow carbon nanosphere material prepared by the application has high capacity, long cycle stability and high rate performance, solves the pain point of insufficient cycle life of existing cobalt-vanadium sulfides, and can promote the large-scale application of sodium ion batteries in the large-scale energy storage field.

This invention relates to a salt spray resistant and anti-aging curing coating and its preparation method, belonging to the field of coating technology. The coating includes modified epoxy resin, ternary nanocomposite filler, composite light stabilizer, hydrophobic eutectic solvent, polysiloxane-modified aromatic amine curing agent, and bio-based polyurethane curing agent. The modified epoxy resin is prepared by reacting bisphenol F epoxy resin, KH-560 silane coupling agent, and tetrabutylammonium bromide, followed by the addition of bi-terminated epoxy silicone oil, 3,3'-dithiodipropionic acid, and p-toluenesulfonic acid, and then by adding pentaerythritol phosphate and antioxidant 1010. The polysiloxane-modified aromatic amine curing agent is prepared by reacting m-phenylenediamine as a matrix, KH-560 silane coupling agent, diphenylsilanediol, and dibutyltin dilaurate. The bio-based polyurethane curing agent is prepared by reacting castor oil-modified polyol, isophorone diisocyanate, dibutyltin dilaurate, dimethylolpropionic acid, and trimethylolpropane.

The invention belongs to the field of adsorption materials, and discloses an MIL-53 (Al)-4A molecular sieve-silica gel composite adsorption runner material and a preparation method thereof. The preparation method comprises the following steps: immersing glass fiber paper subjected to dust removal and grease removal in a silane coupling agent-containing aqueous solution, taking out the glass fiber paper, processing the glass fiber paper into a cylindrical channel-containing blank body, and sequentially immersing the cylindrical channel-containing blank body in a silicon source and boron source-containing aqueous solution and an acidic aqueous solution to obtain the cylindrical channel-containing blank body with alkali-resistant modified silica gel loaded on the surface; and sequentially immersing in an acidic aqueous solution containing an aluminum source and terephthalic acid and an aqueous solution containing a silicon source, the aluminum source and a sodium source to obtain the MIL-53 (Al)-4A molecular sieve-silica gel composite adsorption runner material. According to the method, the 4A molecular sieve and the aluminum-based MOF (MIL-53 (Al)) are simultaneously grown in situ on the cylindrical channel-containing blank body with the alkali-resistant modified silica gel loaded on the surface, so that the problems of powder falling and pulverization caused by infirm physical combination are effectively solved.

The invention provides a ternary positive electrode material and a preparation method thereof, a positive plate, a battery, a battery pack and electric equipment, the ternary positive electrode material comprises secondary particles DA, the secondary particles DA comprise a plurality of primary particles EA, and at least part of the primary particles EA in the secondary particles DA extend from the center of the secondary particles DA to the surface of the secondary particles DA; the exposed ratio of the (010) crystal face of the ternary positive electrode material is greater than or equal to 82%, and the ternary positive electrode material can improve the structural stability and the ionic conductivity of the ternary positive electrode material, and improve the electrochemical performance such as the rate and the cycling stability of the battery.

The invention relates to the technical field of pressure swing adsorption (VPSA) gas separation, and discloses an air suspension oil-free VPSA oxygen generation system capable of actively recovering residual gas, which comprises an oxygen generation host module, a gas path switching module, a buffer output module and a central control module. And the gas path switching module is integrated with a tower top pressure-equalizing regulating valve with continuous opening degree regulating capability, a tower bottom pressure-equalizing control valve and a tower bottom gas supplementing assembly independently communicated with the atmosphere. The central control module executes cooperative control based on the real-time pressure difference data: in the pressure equalizing process, the opening degree of a tower top pressure equalizing regulating valve and the real-time pressure difference are controlled to be subjected to inverse correlation dynamic regulation, and the flow speed is limited to prevent bed pulverization; synchronously opening a tower bottom pressure equalizing control valve to recover bottom dead gap gas potential energy; in the initial stage of pressure increasing and decreasing, the natural pressure difference between the adsorption tower and the atmosphere is used for controlling the air supply assembly to achieve unpowered auxiliary air intake and exhaust. The system operation energy consumption can be effectively reduced, molecular sieve pulverization is prevented, and the oxygen production efficiency is improved.