158results about How to "Improve diffusivity" patented technology

The invention provides a lithium-mixed coated modified ternary positive electrode material as well as a preparation method and application thereof, and relates to the technical field of lithium battery raw materials. Various lithium sources are mixed according to a certain proportion to prepare a ternary positive electrode, co-doping modification is carried out through cooperation of Li3PO4 and a W / Al / Zr / Y / B-containing compound, double-layer coating modification is carried out through cooperation of the Li3PO4 and a Ti / Al-containing compound for primary coating and cooperation of an anhydrous Li compound and TiP2O7 or Ti3 (PO4) 4 for secondary coating, and a double-gradient fast ion conductor coating layer is constructed. The structural stability, the thermal stability, the first discharge capacity and efficiency, the multiplying power, the circulation and storage performance and the like of the single-crystal or polycrystal ternary positive electrode material under different voltage and power conditions are improved; the lithium-mixed multi-element composite ternary positive electrode provided by the invention has the advantages of more stable layered structure, higher safety, higher electronic conductivity, better multiplying power, high specific capacity and long cycle performance.

The invention discloses a polymerizable compound, a liquid crystal composition containing the polymerizable compound and a liquid crystal display device. The polymerizable compound is a compound shown as a formula I, in the formula I, # imgabs 0 # and # imgabs 1 # are respectively and independently represented as # imgabs 2 #, # imgabs 3 # or # imgabs 4 #, and # imgabs 5 # and # imgabs 6 # are not simultaneously represented as # imgabs 7 #; any hydrogen in the # imgabs8 and # imgabs9 can be substituted by alkyl or alkoxy of C1-C5, alkenyl or alkenyloxy of C2-C5, alkyl or alkoxy of C1-C5 substituted by fluorine, alkenyl or alkenyloxy of C2-C5 substituted by fluorine and halogen, and any one or more of-CH2-which is not connected can be independently substituted by-O-,-S-,-CO-,-CH2O-,-OCH2-,-COO-and-OOC-respectively. The polymerizable compound has the advantages of small SEM particles after polymerization and excellent diffusivity and antistatic performance. When being used in a liquid crystal display component, the liquid crystal display component has the advantages of good uniformity, rapid static electricity release and avoidance of bad display phenomena such as broken bright spots. And # imgabs10 # I is adopted.

The invention discloses a high-performance polyacrylonitrile-based carbon fiber and a preparation method thereof, and the preparation method comprises the following steps: proportionally mixing polyacrylonitrile, a solvent and a plasticizer, heating and stirring to obtain a uniform spinning solution; the plasticizer is diphenyl phthalate, bisphenol A-bis (diphenyl) phosphate ester or resorcinol bis (diphenyl) phosphate ester; spinning the spinning solution to prepare a polyacrylonitrile fiber precursor; carrying out hot drawing treatment on the polyacrylonitrile fiber precursor, and then carrying out pre-oxidation and carbonization treatment to obtain polyacrylonitrile-based carbon fibers; the pre-oxidation temperature ranges from 200 DEG C to 300 DEG C, and the pre-oxidation time ranges from 80 min to 160 min. The preparation method of the carbon fiber can effectively improve the spinnability and the draftability of the PAN fiber, and can promote the crystallinity and the graphitization degree of the carbon fiber to be improved, so that the mechanical property of the fiber is enhanced.

The invention provides a diaphragm with a gradient bulk density coating, a preparation method of the diaphragm, a battery and electric equipment, and relates to the technical field of diaphragms. The diaphragm with the gradient bulk density coating comprises a base material and a coating, and the coating is arranged on at least one side of the base material; the coating is prepared from the following raw materials: aluminum oxide, needle-like boehmite, a dispersing agent, an adhesive, an ether surfactant and water; the coating comprises multiple layers, the mass content of aluminum oxide is reduced layer by layer from the side adjacent to the base material to the side away from the base material, and the mass content of needle-like boehmite is increased layer by layer. And the obtained diaphragm with the gradient bulk density coating has high heat resistance, high wettability and high liquid retention rate.

The invention discloses a hollow silicon dioxide microsphere with a double-layer shell structure and a preparation method thereof, the hollow silicon dioxide microsphere with the double-layer shell structure is a spherical body comprising an inner core layer and an outer shell layer, the inner core layer and the outer shell layer are spherical bodies, the inner core layer and the outer shell layer form the double-layer shell structure, the inner core layer is located in the outer shell layer, and the outer shell layer is located in the outer shell layer. The interior of the inner core layer is of a hollow structure, a hollow structure is formed between the inner core layer and the shell layer, and the thickness of the inner core layer is 10-100 nm; the thickness of the outer shell layer is 10-50nm; the distance between the inner core layer and the outer shell layer is 5-100nm, mesopores are uniformly distributed in the inner core layer and the outer shell layer, and the pore diameter of the mesopores is 1-10nm. The hollow silicon dioxide microsphere with the double-layer shell structure is uniform in particle size distribution, good in monodispersity, relatively high in strength and good in dispersity. The preparation method of the microspheres is simple and easy to implement and easy to industrialize, and the hollow silicon dioxide microspheres with the double-layer shell structure can be prepared through a self-template method and a simple and effective selective etching strategy.

The invention provides a nickel-chromium alloy coating, a preparation method thereof and a high-temperature alloy, and the nickel-chromium alloy coating comprises the following components in percentage by mass: 33-48% of Ni, 1-5% of NH4Cl, 1-10% of FeAl, 1-10% of Al2O3, 1-10% of Si, 3-8% of Al, 0.2-0.8% of rare earth element and the balance of Cr. Through the alloying effect of nickel and chromium, a stable passivation layer is formed in the coating, corrosion of a corrosive medium to a matrix can be effectively prevented, and the corrosion resistance of the coating is improved. Through the synergistic effect of nickel and chromium, the coating can form a compact oxidation film at high temperature. The coating has better thermal conductivity and is suitable for coating the inner surface and the outer surface of the boiler. According to the invention, wettability and diffusivity between the coating and the matrix can be improved, and chemical bonding between the coating and the matrix is promoted, so that the coating is not easy to peel off or damage on the matrix, and the nickel-chromium alloy coating and the matrix have good bonding performance.

The invention provides a preparation method of a metal-doped short b-axis HZSM-5 molecular sieve, which comprises the following steps: 1) adding deionized water into a guiding agent, uniformly stirring at room temperature, and then adding a silicon source to obtain silica sol; 2) adding an aluminum source and an inducer into the silica sol, and uniformly stirring to obtain a molecular sieve precursor; 3) adding a metal source into the molecular sieve precursor, and carrying out pre-crystallization; 4) after the pre-crystallization is completed, transferring the mixture into a hydrothermal kettle for hydrothermal crystallization; 5, after hydrothermal crystallization is completed, centrifuging, washing, drying and roasting are conducted, and the metal-doped short b-axis HZSM-5 molecular sieves are obtained.According to the HZSM-5 molecular sieves prepared through the method, active metal and short b-axis hole channel structures are introduced at the same time through in-situ synthesis, the catalytic activity and diffusion performance of the molecular sieves can be improved at the same time, and the application prospects are very good.

The invention relates to the technical field of aluminum alloy materials, in particular to an aluminum alloy material, an aluminum alloy conductor wire core and a preparation method and application of the aluminum alloy conductor wire core. The aluminum alloy material comprises, by mass, 0.3%-1.0% of iron (Fe), 0.03%-0.2% of magnesium (Mg), 0.1%-0.8% of manganese (Mn), 0.08%-0.3% of zirconium (Zr), 0.004%-0.03% of boron (B), 0.015%-0.65% of rare earth (RE), 0-0.12% of silicon (Si) and the balance aluminum (Al) and inevitable impurities, the single impurity is not larger than 0.03%, and the sum of the impurities is not larger than 0.1%. Wherein the rare earth (RE) is prepared from the following components in percentage by mass: 0.003 to 0.1 percent of lanthanum (La), 0.004 to 0.15 percent of cerium (Ce) and 0.008 to 0.4 percent of scandium (Sc). The prepared aluminum alloy material has the characteristics of high conductivity, high strength, heat resistance, corrosion resistance and good fracture and impact toughness, is very suitable for being used as a cable conductor, and is particularly applied to places with high requirements on high temperature, vibration, movement, corrosion and the like, such as power cables, electrical connecting wires, drag chain cables applied to metal smelting places and the like.

The invention discloses electroplating sewage treatment equipment and method, and relates to the technical field of sewage treatment. Comprising an equipment body, a medicament adding assembly and a cleaning assembly, the medicament adding assembly and the cleaning assembly are fixed to the outer wall of the equipment body, a screening assembly used for intercepting precipitates and an adsorption assembly used for pumping sewage are arranged in the equipment body, and the equipment body comprises a main box body; the agent adding assembly comprises a plurality of agent boxes fixed to the outer wall of the main box body, and adding pumps are fixedly connected to the tops of the agent boxes. According to the sewage treatment device, chemicals are added into the main box body in a small amount and multiple times according to a set sequence, so that the chemicals are fully diffused in sewage and fully react with the sewage, and precipitates generated in the reaction process can be continuously intercepted and screened out in the reciprocating lifting process of the lifting plate; the diffusion effect of the medicament in the sewage is better facilitated, the treatment capacity of the medicament is improved, and the influence of precipitates on the diffusion of the medicament is prevented.

The COB lamp strip capable of reducing the light-emitting dark area comprises an FPC circuit board, a bonding pad is welded on the FPC circuit board, a plurality of light-emitting chips are welded on the bonding pad in the linear direction of the bonding pad, the light-emitting chips are covered with fluorescent colloid, the fluorescent colloid is of a spherical protruding structure, and the light-emitting dark area is smaller than the light-emitting dark area. The radius of an arc on the outer side of the fluorescent colloid is 1.2-1.8 mm, and the height of the fluorescent colloid is 1.1-1.5 mm. Compared with the prior art, according to the COB lamp strip capable of reducing the light-emitting dark areas, the COB light source is directly welded to the surface of the flexible circuit board, and the outer side of the light-emitting chip is covered with the layer of arc-shaped fluorescent colloid of the spherical structure; the light-emitting chips are arranged on the lamp strip and matched with the fluorescent colloid, so that the brightness of light emitted by the light-emitting chips is higher, the diffusion effect along the arc face of the colloid is better, the range of the light-emitting angle is enlarged, the overall lighting effect of the lamp strip is improved, and the dark space problem of the lamp strip is solved; and the glue consumption can be saved, and the overall production and manufacturing cost is reduced.

The invention discloses a method for preparing a neodymium iron boron permanent magnet through composite diffusion, and relates to the technical field of rare earth permanent magnet material processing. The method comprises the following steps: step 1, weighing a main alloy material and an auxiliary alloy material; secondly, the main alloy material is smelted and cast into a throwing piece through a piece casting furnace, and then the throwing piece is subjected to annealing treatment. According to the invention, through a composite grain boundary diffusion technology, evaporation treatment is firstly carried out to obtain an intermediate-state magnet, so that the demagnetization exchange coupling effect between adjacent main phase grains is enhanced, and a channel beneficial to subsequent diffusion of heavy rare earth elements is also formed; and then complete diffusion between grain boundaries is achieved, the maximum diffusion depth is achieved, and the best diffusion effect is achieved through subsequent aging treatment.

The invention discloses a modified graphene heating film material and a preparation method thereof, a solvent dissolves modified resin into a liquid state through the solubility of the solvent, and the modified resin can effectively increase the dispersivity of other materials, so that the other materials are effectively and uniformly distributed after being mixed. The graphene powder is a main conductive component and has a heating effect after being electrified, and the carbon black is an auxiliary conductive material. The coupling agent can improve the crosslinking property of the material, and the modified resin is combined, so that the overall bonding strength and flexibility of the material can be improved. And the curing agent can quickly harden and solidify the slurry when the material is dried. And the defoaming agent can eliminate microbubbles generated in the slurry due to stirring and slurry preparation, so that the overall uniformity of the slurry is improved. And the solvent is ethanol which has good solubility and volatility and can be quickly volatilized when the slurry enters a drying stage, so that the sheet resistance uniformity of the surface of the heating film is improved.

The present invention belongs to the technical field of positive electrode active materials, and specifically relates to a nano single crystal lithium iron phosphate and its preparation method and application. The preparation method comprises the following steps: after ball milling a mixture containing a lithium source, an iron source and a phosphorus source in a supercritical fluid, roasting, removing impurities and drying to obtain lithium iron phosphate; after dispersing the lithium iron phosphate in propylene glycol and sintering, a nano single crystal lithium iron phosphate is obtained. The preparation method of the nano single crystal lithium iron phosphate of the present invention combines supercritical fluid technology with secondary sintering, so that the carbon coating on the surface of the lithium iron phosphate is uniform and the grain size of the lithium iron phosphate is refined, thereby improving the electron transmission rate and cycle stability of the lithium iron phosphate.

The invention discloses a quick drying fan of a dish washing machine. The fan comprises an impeller, a fixing piece and a rotating shaft. The fixing piece is provided with a central channel for air to pass through, the rotating shaft is connected with the fixing piece and installed in the channel, and the axial direction of the rotating shaft is kept consistent; a shaft body of the rotating shaft is divided into a plurality of sections in the axial direction, the diameters of all the sections are different, and the sections are used for being matched with rotatable installation of the impeller and limiting connection of the fixing piece; the fixing piece achieves installation of the fan through the threads of the connecting part. On the other hand, the invention provides the dish-washing machine applying the quick drying fan, the dish-washing machine comprises the inner container and the air duct, and the quick drying fan is installed at the air inlet of the inner container through the fixing piece and driven by air discharged from the air outlet of the air duct to rotate. The quick drying fan is arranged at the joint of the air inlet of the inner container of the dish-washing machine and the air outlet of the air duct, so that a good diffusion effect on airflow in the air duct can be achieved, all parts in the dish-washing machine are quickly dried, and the purpose of quick drying is achieved.

The invention discloses a fly ash zeolite-based sustained-release material as well as a preparation method and application thereof. The material is a compound with an FAU / Zeoliite faujasite nanocrystal structure. According to the method, high-value resource utilization can be carried out on the fly ash remaining after combustion of a coal boiler, and in the synthesis process, various trace beneficial mineral nutrient substances of the fly ash are automatically loaded in the space of the honeycomb-shaped micro-mesoporous cage frame channel, so that required energy and mineral requirements can be provided for soil microorganisms and soil animals; the slow-release effect can be achieved, and macroelement nutrient chemicals can be completely replaced. The slow-release medium containing the material provided by the invention is a composition carrying trace mineral nutrients required by plants and macro nutrients lacked in a soil environment; the fertilizer can be widely applied to soil fertilizers, promotion of ecological balance of soil microorganisms and soil animals, promotion of degradation or inactivation of toxic substances in soil, soil pH improvement, plant fertilizers, promotion of plant growth, plant irrigation and the like, and has good effects.

The present invention discloses a LiAlH4-based composite hydrogen storage material and a solid-phase preparation method thereof. The method first prepares a lithium aluminum alloy by smelting in an inert atmosphere, then prepares a LiAl alloy by low-temperature freezing ball milling under liquid nitrogen cooling conditions, refines the grains and particle size of the lithium aluminum alloy, and finally obtains a coordinated aluminum-based composite hydrogen storage material by ball milling through a hydrogenation reaction in a hydrogen atmosphere. The present invention adopts a solid-phase preparation method, and can prepare LiAlH4 without using a catalyst, while avoiding the use of an organic solvent, eliminating the subsequent solvent removal process, and directly preparing LiAlH4 without passing through an intermediate phase Li3AlH6. The prepared LiAlH4-based composite hydrogen storage material does not contain Li3AlH6, has a low hydrogen release temperature, and a fast hydrogen release rate, and can realize the large-scale preparation and application of LiAlH4.

The utility model discloses a packaging structure capable of improving substrate wiring space and reducing packaging size. The packaging structure comprises a substrate and a plurality of chip dies, the die is flatly laid on the top surface of the substrate and is connected with a contact finger on the substrate; and in the die, the power input end and the grounding input end of the main chip are connected with a power contact PWR finger and a ground contact GND finger on the top surface of the substrate. The front surface of the dummy die is a metal conductive layer, and the back surface of the dummy die is a non-metal insulating layer; the dummy die is divided into a PWR die and a GND die; the back surfaces of the PWR die and the GND die face downwards; the power input end and the grounding input end of the main chip are respectively connected with the front surfaces of the PWR die and the GND die; the PWR finger and the GND finger are respectively connected with the front surfaces of the PWR die and the GND die; a power supply and a grounding output end of the main chip are respectively connected with a power supply and a grounding input end of the auxiliary chip.

The application discloses a SiC reactor for cyclohexanone aminooxidation and a design method thereof, and relates to the technical field of chemical reactors. The SiC reactor comprises a reactor shell, a plurality of reaction channels, a plurality of composite plates, and a plurality of reaction channels. The axis direction of the reaction channel is parallel to the axis direction of the reactor shell. The plurality of composite plates are arranged in the plurality of reaction channels. The flat plate and the corrugated plate made of silicon carbide are arranged in the axial direction of the reaction channel and matched with the rhombic through-hole structure. The fluid in the reaction channel can be disturbed, the radial diffusion effect of the fluid is improved, and the effective residence time of the fluid is prolonged. Based on the excellent heat conduction performance of silicon carbide and the plate combination structure, the heat exchange between the wall surface and the fluid is strengthened, the temperature field distribution in the channel is optimized, the mass transfer and heat transfer conditions of the material are improved, and the generation effect of cyclohexanone oxime is improved.

The invention belongs to the technical field of oil-solid two-phase particle filtration, and particularly relates to a modified glass fiber filter material for oil-solid two-phase particle air filtration and a preparation method thereof. The modified glass fiber filter material is obtained by depositing a modified nano silicon dioxide solution on the surface of the glass fiber filter material through an impregnation method; wherein the modified nano silicon dioxide is obtained by modifying nano silicon dioxide through a silane coupling agent. Modified nano silicon dioxide is obtained by grafting a functional group with oleophylic performance on the surface of nano silicon dioxide through silane, and then the modified nano silicon dioxide is added on the surface of the filter material to change the surface roughness of the filter material, so that the wettability of the filter material is changed from two aspects, and the separation of deposited oil and solid particles on the filter material can be realized; the oil accumulated on the surface of the filter material is quickly conveyed into the filter material, so that the flowing capacity of the oil on filter fibers is enhanced, the formation of an oil film is inhibited, and the increase rate of pressure drop in the filtering process is reduced.

The application discloses an integrated stretchable flexible wearable biosensor and a preparation method thereof, and belongs to the technical field of electrochemical sensing.The integrated stretchable flexible wearable biosensor is wrapped by a PAN / SiO2 sweat absorption layer.The method comprises the following steps: preparing a stretchable conductive composite fiber; preparing an integrated stretchable flexible sensing fiber; preparing a PAN / SiO2 sweat absorption layer; and preparing a sensor.The conductive composite fiber in the application can maintain stable performance under multiple bending and twisting, the sensor is integrated with a flexible integrated circuit chip and a flexible power supply device to obtain a fabric sensing system, the fabric sensing system can process acquired sensor data, and the detection data can be uploaded to a mobile terminal and a cloud end in real time through Bluetooth technology, real-time monitoring and management of a health condition of the biosensor are realized, six specific biomarkers can be efficiently detected by using only 1 muL of sweat, the amount of sweat required for activating the biosensor is 1 / 3 of that of the prior art, and the fabric sensing system can easily adapt to a tensile strain caused by exercise.

A plurality of grating strips are fixed on a plurality of keels in a nailing mode and arranged at intervals in the width direction of a mounting frame, the cross section of each grating strip is integrally arranged in a trapezoid shape, the vertex angle of the cross section of each grating strip ranges from 90.5 degrees to 95 degrees, and the two ends, in the width direction, of each grating strip are inwards folded at the position of the bottom edge to form bottom slits; according to the grating sound absorption assembly provided by the utility model, the plurality of grating strips are nailed and fixed on the plurality of keels and are arranged at intervals in the width direction of the mounting frame, so that the fixing effect of the grating strips is excellent, the possibility of vibration is reduced, the cross sections of the grating strips are integrally arranged in a trapezoidal shape, and the trapezoidal surfaces of the grating strips can form an excellent diffusion effect; the sound absorption effect is assisted; the cross sections of the grid strips are trapezoidal, so that the fixing stability of the grid strips is improved; after sound waves are transmitted in from the gaps between the grating bars and reach the bottom slits, a resistant silencing effect is formed, and the effect of absorbing low-frequency noise is facilitated.

The present invention relates to thel field of lithium ion batteries. Disclosed are a surface-coated positive electrode material and a preparation method therefor, and a lithium ion battery. The positive electrode material comprises a base body and a coating layer covering the surface of the base body; the characteristic peaks of the coating layer at a position where 2θ is 31°-35° according to an XRD test are in a bimodal distribution; and the ratio Ib / Ia of the peak intensity Ib of the secondary peak to the peak intensity Ia of the main peak in the bimodal distribution is 0.8-1. The surfce-coated positive electrode material has high ion and electron conduction capability, and can accelerate the diffusion rate of ions and electrons in the positive electrode material, thereby significantly improving the rate capability of the lithium ion battery comprising the positive electrode material. Meanwhile, the surface-coated positive electrode material having the specific coating layer can avoid catalytic corrosion between the positive electrode material and an electrolyte, thereby improving the cycling stability of the lithium ion battery comprising the positive electrode material. In addition, the thermal stability of the surface-coated positive electrode material having the specific coating layer is significantly improved.

The present invention discloses a multifunctional spraying device, which mainly comprises a first spraying mechanism and a second spraying mechanism arranged on a device body, wherein the first spraying mechanism performs mixed-pressure atomization through high pressure, and is mainly used for atomizing and spraying a working fluid (such as a disinfectant, a nutrient solution or a pesticide, etc.) to obtain small-molecule dry mist, which can ensure the stable performance of the working fluid, while the second spraying mechanism performs temperature-raising atomization by heating and pressurizing, and is mainly used for atomizing and spraying a synergist (for diffusion and suspension), and obtains particle diffusion smoke with good diffusion effect and long-lasting suspension. At the same time, since the second nozzle is arranged below the first nozzle, by utilizing the suspension ability and diffusion ability of the diffusion smoke, the dry mist and the diffusion smoke can be fully combined to efficiently perform three-dimensional disinfection operations, pesticide spraying operations or crop fertilization.

The invention discloses a method for improving the stability of sulfide electrolyte to lithium on a large scale, belongs to the field of solid electrolyte materials of lithium metal batteries, and particularly relates to preparation of electrolyte materials, preparation of conductive agents, preparation of composite positive pole pieces and preparation of all-solid-state lithium metal batteries. According to the invention, the sulfide electrolyte is soaked in the liquid inorganic metal halide and then is mechanically compounded with the sulfide electrolyte to prepare the composite sulfide electrolyte with high ionic conductivity and high density, and the electrolyte can effectively reduce lithium deposition overpotential and inhibit lithium from puncturing a solid electrolyte layer; glycosyl carbide prepared from inositol hexaphosphate, 2-hydroxymethyl imidazole, polyaniline and glucose is used as a conductive agent, so that the conductivity and critical current density of the composite positive pole piece are remarkably improved; and the prepared all-solid-state lithium metal battery is stable in circulation and excellent in rate capability and safety, so that the all-solid-state lithium metal battery has great application potential in the fields of vehicle preparation and the like.

The invention discloses a method for improving the carbonization performance of low-carbon clinker by utilizing ettringite. The method comprises the following steps: mixing low-carbon clinker, ettringite and water, and pressing and molding the mixture; drying the molded sample, and then carbonizing the mixture for 12-24 hours under the conditions of a CO2 concentration of 15-20%, a temperature of 50-70°C, a humidity of 50-80%, and an air pressure of 0.1-0.3MPa to obtain a carbonized clinker; and adding ettringite to the low-carbon clinker so that the ettringite is gradually carbonized under the CO2 condition and releases water to retain water, thereby providing partial carbonization strength and extending the effective carbonization time of the low-carbon clinker, thereby effectively improving the carbonization strength and carbon fixation rate of the low-carbon clinker, and the low-carbon clinker can be used in a carbonization environment with high temperature and low CO2 concentration in the tail gas of a cement industrial kiln.

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

The invention discloses a hierarchical pore EUO molecular sieve as well as a preparation method and application thereof. The morphology of the hierarchical pore EUO molecular sieve is fusiform; the catalyst has micropores and mesopores; the pore volume of the micropores is 0.12 to 0.15 cm < 3 > / g; and the pore volume of the mesopores is 0.14-0.25 cm < 3 > / g. According to the synthetic route, the hierarchical pore EUO molecular sieve with high crystallinity is prepared by a one-step hydrothermal crystallization method through optimization of the ratio of a silicon-aluminum source to a synthetic system and addition of seed crystals. The EUO molecular sieve provided by the invention has a relatively large mesoporous volume, so that the EUO molecular sieve has excellent diffusion performance, and has excellent reaction stability in an isomerization reaction of m-xylene.

The invention relates to the technical field of aqueous zinc ion batteries, and discloses a high-utilization-rate and high-stability zinc electrode as well as a preparation method and application thereof. The zinc electrode comprises a base body and a functional coating attached to the surface of the base body, and the functional coating is formed by coating the surface of the base body with slurry formed by zinc powder, an adhesive and a functional additive and drying the slurry. According to the obtained zinc electrode, the zinc ion diffusivity under the high DOD condition can be remarkably improved, the free water induced parasitic side reaction and the stress cracking problem caused by the volume effect are inhibited, the long circulation stability under the high zinc metal utilization rate (15-96%) condition is prolonged, and the good application prospect is shown in a low N / P zinc-based device.

The invention relates to the technical field of photocatalytic materials, and particularly discloses a three-dimensional composite photocatalytic material, a preparation method thereof and a wastewater treatment system. Comprising Fe3S4 particles and a polyurethane material, the Fe3S4 particles are loaded in the polyurethane material; the loading capacity of the Fe3S4 particles is 5 to 25 weight percent. Fe3S4 particles with ordered charges are loaded in a polyurethane material, the prepared three-dimensional composite photocatalytic material has Fe < 2 + > and Fe < 3 + > redox pairs, generation of active oxygen is promoted through light-induced Fe < 2 + > and Fe < 3 + > continuous redox circulation, and antibiotic degradation is facilitated. And the polyurethane material enlarges the contact surface area of the three-dimensional composite photocatalytic material and pollutants, so that the mass transfer and diffusion effects of a catalyst interface are facilitated, and the interaction of pollutants and active oxygen is enhanced to realize degradation of antibiotics.

The invention discloses a negative pole piece, a battery monomer, a battery and a power utilization device, the negative pole piece comprises a main body area, a thinning area arranged on one side of the main body area and a tab arranged on one side of the thinning area, the compaction value of the thinning area is smaller than that of the main body area, and the thickness of the tab is smaller than that of the main body area. The compaction value of the thinning area close to the tab is reduced corresponding to the main body area, so that the purpose of influencing the transmission resistance of lithium ions in the negative pole piece is achieved, the high temperature rise near the tab of the negative pole piece is improved, and the problems of side reaction increase, negative pole local internal resistance increase, local lithium precipitation and capacity diving caused by the high temperature rise are further avoided.