28results about How to "Easy to oxidize" patented technology

The invention belongs to the technical field of lithium ion batteries, and relates to an electrolyte of a lithium ion battery for a high-nickel ternary positive electrode material and application of the electrolyte, and the electrolyte comprises an organic solvent, a lithium salt and an additive, the additive is prepared from (5-cyanopyridine-3-yl) potassium trifluoroborate. The lithium ion battery electrolyte can form low-impedance interfacial films on the surfaces of a positive electrode and a negative electrode at the same time, interface stability is improved, and better cycling stability and longer service life can be obtained when the lithium ion battery electrolyte is applied to a lithium ion battery.

The invention relates to a silicon-carbon composite material based on modified MXene, a preparation method of the silicon-carbon composite material, a negative electrode and a battery. MXene is prepared by etching an MAX phase through an etching agent; the preparation method comprises the following steps: preparing graphene quantum dots B-GQD and P-GQD + respectively; the graphene quantum dots B-GQD, the graphene quantum dots P-GQD + and the MXene are self-assembled through electrostatic adsorption, and a modified MXene material B / P-GQD / MXene is formed; preparing a porous carbon material deposited with silicon nanoparticles; the modified MXene material B / P-GQD / MXene is adopted to carry out liquid phase coating on the porous carbon material deposited with the silicon nanoparticles, and the silicon-carbon composite material based on the modified MXene is formed. The conductivity of the silicon-carbon composite material can be enhanced, and the rate capability of the lithium ion battery can be improved.

The invention discloses a preparation method and application of a pyrenyl covalent organic framework material containing pyridine nitrogen. The material has good application in the aspect of activating potassium monopersulfate (PMS) to degrade organic pollutants. The preparation method of the pyrenyl covalent organic framework material containing pyridine nitrogen comprises the following steps: taking 1, 3, 6, 8-tetra-(p-aminophenyl)-pyrene and 2, 6-pyridinedicarboxaldehyde as synthesis precursors, and carrying out Schiff base reaction to obtain the pyrenyl covalent organic framework material containing pyridine nitrogen. By introducing a pyridine nitrogen structure, the PMS activation capacity is remarkably improved, the efficient catalytic degradation capacity on bisphenol A is shown, meanwhile, the material is stable in property, does not generate secondary pollution, can be recycled, and has important application value and application prospects in the aspect of organic pollutant degradation.

The invention discloses an automatic magnetic field forming system which comprises a pressed blank conveying device, a boxing box, a conveying material box, a magnetic field pressing machine, a first glove box, a third isolation valve and a discharging box. The pressed blank conveying device comprises a conveying device shell and a conveying belt; the multiple magnetic field presses are connected to the conveying device shell side by side. The conveying device shell is fixed, and the magnetic field press can move relative to the conveying device shell. And the tail end of the pressed blank conveying device is connected with the boxing box. The pressed blank conveying device serves as a conveying channel of the automatic magnetic field forming system and conveys pressed blanks pressed by the magnetic field pressing machines into the boxing box. The pressed blank conveying device, the boxing box and the magnetic field pressing machine in the working state form a closed space, and the closed space is filled with protective gas; the conveying material box can move to the opposite face of the boxing box to be in butt joint with the boxing box, or the butt joint with the boxing box is relieved, and the conveying material box moves away from the boxing box. The invention further discloses an automatic magnetic field forming method which is implemented by adopting the automatic magnetic field forming system.

The present disclosure belongs to the field of battery technologies, and specifically relates to a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. The non-aqueous electrolyte solution includes a non-aqueous organic solvent, a lithium salt, and an optional electrolyte additive. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2, and a width of the positive electrode plate is C cm, wherein a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance of a battery cell of the prepared battery, and can also solve a problem of lithium deposition at an edge of an electrode plate occurred after cycling of the battery cell, to avoid problems, such as thickness failure in high-temperature storage and lithium deposition in high-temperature cycling of the battery cell caused by warping and deformation of a termination tape of a positive electrode plate, an adhesive layer in the termination tape of the positive electrode plate being easily soluble in a non-aqueous electrolyte solution, and the non-aqueous electrolyte solution being easily oxidized, reduced and decomposed at positive and negative interfaces, occurred when the battery is used in a high-temperature environment.

The invention discloses a ternary positive electrode material and a preparation method thereof, and relates to the field of battery positive electrode materials and preparation methods thereof.The ternary positive electrode material is prepared from a nickel-cobalt-manganese hydroxide precursor, lithium salt and an oxygen-enriched oxygen storage material, and the oxygen-enriched oxygen storage material is used for generating oxygen in the preparation process, converting bivalent nickel into trivalent nickel, and storing the trivalent nickel in the lithium salt. And the content of divalent nickel is reduced. According to the invention, the oxygen-rich oxygen storage material is adopted as an additive to sinter the ternary positive electrode material so as to dope and / or coat the ternary positive electrode material, and because oxygen is generated in the sintering preparation process of the oxygen-rich oxygen storage material, divalent nickel in the ternary positive electrode material can be better oxidized into trivalent nickel; the content of divalent nickel in the ternary positive electrode material is reduced, so that the lithium-nickel mixed arrangement degree in the ternary positive electrode material is reduced, migration of lithium ions in the charging and discharging process is facilitated, and the specific capacity and rate capability of the ternary positive electrode material are improved.

The invention discloses a high-speed low-temperature spraying gun with a fuel premixing structure and a system of the high-speed low-temperature spraying gun, and belongs to the technical field of material surface modification and coating. The spray gun comprises a powder feeding needle, the powder feeding needle is sleeved with a pre-premixing air distribution unit I and a pre-premixing air distribution unit II, the end of the powder feeding needle penetrates through a premixing common porous catalytic ceramic plate and is communicated with a combustion chamber, and a premixing interlayer is arranged between the pre-premixing air distribution unit II and the premixing common porous catalytic ceramic plate; a fuel gas channel and a powder feeding needle-compressed air channel are arranged in the pre-premixing air distribution unit I, and the powder feeding needle-compressed air channel is arranged on the periphery of the powder feeding needle; an air and gas inlet and a compressed air channel are arranged outside the pre-premixing air distribution unit I; the compressed air channel is communicated with the air inlet, the powder feeding needle-compressed air channel, the premixing interlayer and the outer wall of the combustion chamber; and the fuel gas channel is communicated with the fuel gas inlet and the premixing interlayer. The spray gun can keep flame flow stable, reduce the temperature of particles and inhibit oxidation and decomposition of the particles.

This invention relates to conjugated polymers containing dibenzofuran (thiophene) and carbazole units, their preparation methods, and applications. To address the problems of poor optical contrast, slow response time, and poor cycling stability of existing conjugated polymers as electrochromic materials, this invention uses 2,8-dibromodibenzofuran or 2,8-dibromodibenzothiophene as reactants, reacting them with 9-hexyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole or 9-phenyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole to form conjugated polymers with dibenzofuran (thiophene) and carbazole units in the main chain. The conjugated polymers of this invention exhibit excellent electrochromic properties, including excellent cycling stability, fast switching time, high optical contrast, and low voltage start-up. This invention is expected to be applied in fields such as smart windows, rearview mirrors, military camouflage, and electronic tags in the construction and automotive industries.

The invention relates to a grain boundary diffusion source coating material and method for improving residual magnetism of a (Ce, R)-Fe-B magnet, belongs to the technical field of rare earth permanent magnet materials, and aims to solve the problem that the coercive force of the magnet cannot be reduced when the La element is applied to the cerium-containing magnet in the conventional method for applying the La element to the cerium-containing magnet. The invention relates to a grain boundary diffusion source coating for improving the residual magnetism of a (Ce, R)-Fe-B magnet, the grain boundary diffusion source coating is powder, comprises elements La, Al and Cu, and is expressed as La1-x-yAlxCuy according to atomic percent, x is more than or equal to 25 and less than or equal to 0.35, and y is more than or equal to 0.05 and less than or equal to 0.15. The La1-x-yAlxCuy grain boundary diffusion source coating provided by the invention can improve the residual magnetism and coercive force of the cerium-containing magnet at the same time.

This invention discloses a heterocyclic polyarylamide-polyhydroxyarylamide precipitated fiber, its preparation method, and a heterocyclic polyarylamide-polybenzodioxazole paper, belonging to the technical field of high-performance organic fiber and paper preparation. The preparation method of the precipitated fiber includes the following steps: A. Preparation of the polymerization solution: 3,3'-dihydroxybenzyl diamine (DHB) and 2-(4-aminophenyl)-5-aminobenzimidazole (DAPBI) are dissolved in an organic solvent containing a solubilizing salt, and then terephthaloyl chloride is added to react and obtain a polymer solution with a solid content of 1-10%; B. Precipitation: After degassing, filtering, metering, and spinning, the polymer solution is mixed with a coagulation bath and precipitated to obtain the heterocyclic polyarylamide-polyhydroxyarylamide precipitated fiber. A heterocyclic polyarylamide-polybenzodioxazole paper prepared from this precipitated fiber is also provided. This invention introduces a heterocyclic polyaromatic amide structure through copolymerization, which not only improves the strength and composite properties of the cyclized PBO paper, but also maintains a decomposition temperature comparable to that of pure PBO fiber, exceeding 600℃, demonstrating excellent thermal stability. Furthermore, this method is simple and easy to implement, making it suitable for industrial production applications.

The invention belongs to the technical field of hydrogel, and relates to a preparation method of a hydrogel drug delivery system based on hawthorn pectin and hawthorn alcohol extract. According to the preparation method disclosed by the invention, a hydrogel drug loading system is formed by the hawthorn pectin and alcohol-soluble components in the hawthorn for the first time, the hawthorn pectin is gelatinized by adjusting the pH value and adding a co-solute so as to form the drug loading system, and when the pH value is relatively low, the gelatinization of the high-ester pectin is more facilitated, and the encapsulation efficiency of flavonoid components is more favorably improved.

The invention discloses an EUV oxidation easy-to-clean coating layer as well as a preparation method and application thereof, and relates to the technical field of glass production. According to the technical scheme, the photosensitive coating comprises the following components in percentage by mass: 5-15% of tetrabutyl titanate, 10-20% of a photosensitive resin polymer matrix, 1-3% of a surfactant, 2-5% of a flatting agent, 2-5% of a defoaming agent and 65-80% of a solvent. The coating layer can replace traditional spacer paper, effectively protects the surface of the glass substrate, can be rapidly oxidized and degraded under EUV light irradiation, is easy to clean, and achieves a convenient and residue-free cleaning effect.

The invention belongs to the technical field of nanocrystalline hard alloy, and discloses tungsten carbide-based nanocrystalline hard alloy and a preparation method thereof. The preparation method comprises the following steps that tungsten carbide powder is put into a modified solution containing soluble cobalt salt and soluble lanthanide series metal salt to be soaked, solid matter is collected, washed and dried after soaking is completed, and first powder is obtained; calcining the first powder in a reducing atmosphere to obtain second powder; and mixing the second powder, high-entropy metal carbide powder or high-entropy metal carbonitride powder and boron carbide powder, and then forming and sintering to obtain the tungsten carbide-based nanocrystalline hard alloy. The comprehensive effect of lanthanide series metal, high-entropy metal carbide powder or high-entropy metal carbonitride powder and boron carbide is utilized, and a novel introduction mode is adopted, so that the granularity of tungsten carbide is effectively inhibited, the nanocrystalline hard alloy with excellent hardness, obdurability and high temperature resistance is successfully prepared, and the practicability is very high.

The invention relates to a perovskite cell based on an In (OTf) passivated perovskite layer and a preparation method thereof, through introduction of an indium trifluoromethanesulfonate passivator into the perovskite layer, through strong coordination of trifluoromethanesulfonate and Sn < 2 + >, crystallization of Sn < 2 + > is delayed, a lower oxidation-reduction potential of In < 3 + > is achieved, oxidation of Sn < 2 + > is reduced, and thus high efficiency and stability of mixed tin-lead narrow-band gap perovskite are achieved.

The invention discloses a preparation method and application of a granular material with ferroferric carbide and zero-valent iron co-loaded on the surface of silicon dioxide coated ferroferric oxide, and belongs to the technical field of catalytic materials and environmental protection. The preparation method of the material comprises the following steps: firstly preparing a ferroferric oxide particle material by a hydrothermal method, then preparing silicon dioxide coated ferroferric oxide by hydrolysis reaction, and finally co-loading zero-valent iron and ferroferric carbide on the surface of the silicon dioxide coated ferroferric oxide by reduction reaction. The granular material is formed by loading the ferroferric carbide and the zero-valent iron on the surface of the silicon dioxide coated ferroferric oxide. According to a reduction loading method, ferroferric carbide and zero-valent iron are firmly combined on the surface of silicon dioxide coated ferroferric oxide through covalent interaction, so that the stability of the material surface is greatly improved, the activity of the material is improved, and the service life of the material is prolonged. The material provided by the invention is safe and non-toxic, and is suitable for efficiently and stably treating nitrite pollution of a high-salinity water body.

The application is a honeycomb concrete wave-absorbing structure based on a full-dielectric phase gradient metasurface, which is composed of a base fiber honeycomb concrete and a top full-dielectric phase gradient metasurface structure. The base fiber honeycomb concrete is divided into a multi-layer structure by different contents of wave-absorbing agents, the impedance matching is adjusted by changing the content and type of the wave-absorbing agents, and the function of maximum absorption of electromagnetic waves is achieved. The fiber wave-absorbing honeycomb woven by wave-absorbing fibers enables the concrete to have good toughness and strength, and achieves the dual effect of synergistic enhancement of wave-absorbing and mechanical properties. The size and shape of the micro units in the full-dielectric phase gradient metasurface can be flexibly adjusted, different micro units are combined, electromagnetic waves produce different phases, and the purpose of flexibly adjusting the electromagnetic wave-absorbing performance of different frequency bands is achieved. Through the combination of 3D fiber honeycomb structure, multi-layer wave-absorbing structure and metasurface and other factors, the optimal electromagnetic wave-absorbing structure is prepared, and the requirements of thin, light, wide and strong of the electromagnetic wave-absorbing material are met.

The utility model relates to the technical field of crystallization casting, in particular to a structure for improving aluminum alloy oil-gas sliding casting surface quality, which comprises a dummy bar head and a crystallizer, a graphite ring is embedded above the inner wall of the crystallizer, and the outer side of the graphite ring is connected with a plurality of graphite ring air inlet pipes. A honeycomb graphite plug is installed on the inner side of the outer wall of the lower portion of the adapter plate, and the inner wall of the pressing plate communicates with an ultra-micro pressure relief valve through an air adjusting hole. Through the cooperation between the ultra-micro pressure relief valve and the adapter plate, the volume of molten aluminum in crystals is controlled by air pressure, so that the molten aluminum does not contact with the adapter plate, the adapter plate is not damaged, the service life of the adapter plate is prolonged, and the problems that the adapter plate is damaged and the service life of the adapter plate is shortened due to the fact that the molten aluminum is likely to contact with the adapter plate are effectively solved; and the problem that in the overflowing process, the molten aluminum is prone to being oxidized, dross on the surface of the molten aluminum is disturbed, and the aluminum dross sinks easily and is mixed in a cast ingot to form casting defects is solved.

The present application relates to the field of chemical technology, and provides a mussel mucin cream dressing and a preparation method thereof. The preparation method includes: obtaining a preset mass percentage of mussel mucin, an oily matrix, sodium hyaluronate, silk protein and a pH regulator; after dissolving the mussel mucin in purified water and heating it to 80±5°C, adding a pH regulator to the mussel mucin to adjust the pH value to a preset range; adding sodium hyaluronate and silk protein to the mussel mucin and stirring them fully, as a water phase for standby use; heating the oily matrix to 75‑90°C, as an oil phase for standby use; adding the oil phase to the water phase, stirring the oil phase and the water phase by a stirring device, until the oil phase and the water phase are evenly mixed, and obtaining a mussel mucin cream dressing of an oil-in-water system. The oil-in-water system changes the storage conditions of the product from special refrigerated or frozen storage to conventional room temperature storage, saving storage and transportation costs, and making it more convenient to use.

The invention relates to a series-fed four-arm spiral circularly polarized omnidirectional antenna based on a carbon material, and belongs to the technical field of microwave antennas. According to the antenna, a four-arm helical antenna is made of a carbon material, and omnidirectional circularly polarized radiation is realized through a feed network. Compared with a traditional metal antenna, the carbon material is adopted to replace metal, the weight and cost of the antenna are effectively reduced, and meanwhile good antenna performance is kept. The feed network adopts the microstrip line design, the structure is simple, special devices and materials are not needed, and the cost is further reduced. The antenna has the advantages of being simple in structure, easy to process and manufacture, good in omnidirectional circular polarization radiation characteristic and the like, and has wide application prospects in the fields of satellite communication, mobile communication, radar systems and the like.

The invention belongs to the technical field of environmental protection, and relates to a FeMnZrOx catalyst for denitration of tail gas of a diesel engine and a preparation method of the FeMnZrOx catalyst. The preparation method comprises the following steps: uniformly mixing zirconium salt, manganese salt, ferric salt and a solvent, adding citric acid, and uniformly mixing to obtain a mixed solution; and heating the mixed solution, and drying and calcining after heating to obtain the FeMnZrOx catalyst. The process for synthesizing the FeMnZrOx catalyst is simple, easy and convenient to operate, low in cost, high in thermal stability and good in poisoning resistance, the prepared catalyst can improve the acidity of the catalyst and promote NH3-SCR reaction, meanwhile, the content of oxygen adsorbed on the surface of the catalyst can be improved, the oxygen storage capacity can be improved, the activity of the catalyst is improved, and the purposes of saving energy and reducing emission are achieved.

The invention belongs to the technical field of microwave absorbing materials, and relates to a preparation method of a Ni-MWCNTs / MXene composite material for in-situ regulation and control of growth of CNTs. The invention discloses a preparation method of a Ni-MWCNTs / MXene composite material for in-situ regulation and control of growth of CNTs, and the preparation method comprises the following steps: by taking a few-layer Ti3C2Tx dispersion liquid as an electrolyte, a nickel sheet as a working electrode and a graphite electrode as a counter electrode, applying 0.1-3V voltage, depositing for 1-20 hours, and carrying out CVD in-situ growth to obtain the Ni-MWCNTs / Ti3C2Tx composite material. The invention further discloses the Ni-MWCNTs / MXene composite material for in-situ regulation and control of growth of the CNTs, Ni particles and carbon nanotubes are loaded on the Ni-MWCNTs / MXene composite material, the average particle size of the Ni particles is 10-30 nm, and the average tube diameter of the carbon nanotubes is 20-50 nm. According to the Ni-MWCNTs / Ti3C2Tx composite material and the preparation method thereof, a catalytic strategy of adsorbing metal ions through electrophoretic deposition is adopted, few layers of Ti3C2Tx are used as an electrolyte, in-situ regulation and control growth of CNTs is carried out on MXene, and the Ni-MWCNTs / Ti3C2Tx composite material with the excellent wave absorbing performance is obtained.

The present invention belongs to the technical field of lithium ion batteries, and relates to an electrolyte for a lithium ion battery with a high nickel ternary positive electrode material and its application, including an organic solvent, a lithium salt and an additive; the additive includes (5-cyanopyridine-3-yl) potassium trifluoroborate. The lithium ion battery electrolyte of the present invention can form a low-impedance interface film on the positive and negative electrode surfaces at the same time, improve the interface stability, and be applied to lithium ion batteries to obtain better cycle stability and lifespan.

The application discloses a Cu-Sn-S metal sulfide adsorbent for capturing Ni 2+ , and has the molecular formula K 2‑ x Cu x (H2O) x [Cu2Sn2S6], x =0.1~1.9; has a two-dimensional layered structure, each electronegative layer skeleton is sequentially composed of [Sn-Cu-S], [Cu-S] and [Sn-Cu-S] three sub-layers, wherein K + is located in the pores of two [Sn-Cu-S] sub-layers and is used for balancing the charge of the layer skeleton; when Ni 2+ is adsorbed, Cu + in the [Sn-Cu-S] sub-layer is exchanged with Ni 2+ , so that the high-efficiency and high-selectivity capture of Ni 2+ in radioactive wastewater is realized.

Provided is a joint of a copper terminal and an aluminum conductor. A copper terminal connecting member of the joint is connected to a conductive core of the aluminum conductor by means of a transition welding layer, and the joint can also be provided with a reinforcing welding layer. Further provided is a method for preparing the joint using plasma arc welding. According to the invention, the connection portion of the copper terminal with the aluminum conductor is filled with solder in a plasma arc welding manner, such that copper and aluminum are connected by means of the solder. Damage to an aluminum oxide layer during welding increases the conductivity and can also isolate the copper terminal and the aluminum conductor, thus preventing an electrochemical reaction between the copper and the aluminum, prolonging the service life of the joint of the copper terminal and the aluminum conductor, and ensuring the mechanical and electrical performance of the connection structure.

This method for recovering a valuable metal from a used LIB includes: a step of adding, to an electrode assembly taken out of a detoxified used LIB, metallic zinc in an excess amount relative to a mass of the electrode assembly; a step of heating a mixture of the electrode assembly and the metallic zinc to form a molten metal; a step of taking out the molten metal and separating the molten metal into an alloy metal and a slag; and a step of heating the alloy metal to volatilize zinc in the alloy metal, and thereby, recovering an alloy metal of a valuable metal.

The invention discloses a preparation method of a copper oxide-carbon nitride nanotube composite particle with a core-shell structure. The preparation method comprises the following steps: S1, preparing a carbon nitride nanotube by a water-induced phase transformation forming method; s2, dispersing a predetermined amount of carbon nitride nanotubes in deionized water, and uniformly mixing to obtain a carbon nitride dispersion liquid; s3, soluble copper salt is added into the carbon nitride dispersion liquid, stirring and mixing are conducted, drying and grinding are conducted, and mixed powder is obtained; and S4, calcining the mixed powder in a reducing atmosphere, and grinding to obtain the core-shell structure copper oxide-carbon nitride nanotube composite particles. The core-shell structure of the copper oxide-carbon nitride nanotube composite particle can adjust the electronic structure and improve the electrical properties of the material; cu2O nuclear energy is introduced, so that the energy band position of the core-shell structure nano-particles is raised, a Z-type energy band structure is formed, charge carrier transfer is accelerated, and the photo-reduction capacity is improved. The invention further discloses the copper oxide-carbon nitride nanotube composite particle with the core-shell structure and application of the copper oxide-carbon nitride nanotube composite particle.

The utility model discloses energy-saving aluminum alloy door and window heat insulation strip processing equipment, and relates to the technical field of aluminum alloy door and window heat insulation strips. The heat insulation strip comprises supporting plates, rotating shafts are arranged on one sides of the opposite faces of the supporting plates in a rotating mode, a stirring barrel is fixedly arranged between the rotating shafts, auxiliary stirring assemblies are arranged on one rotating shaft and the supporting plate, and a barrel cover is detachably arranged on the upper surface of the stirring barrel. A disc can be rotated by starting a second motor, a convex rod can slide along the inner surface of a hollow rod through rotation of the disc, the hollow rod can reciprocate through a movable rod and a sleeve, a rack can reciprocate through a fixed block, and the heat insulation effect can be improved through a heat insulation film. The rack can drive the gear to swing back and forth, and the stirring barrel can swing by matching the connecting rod with the rotating shaft, so that the raw materials can be mixed more sufficiently.

The invention provides a preparation process of a formaldehyde-free adhesive, and relates to the technical field of material science, the preparation process of the formaldehyde-free adhesive completely avoids the use of formaldehyde, eliminates the potential harm of formaldehyde to the environment and human health from the source, and can be used for preparing the formaldehyde-free adhesive by accurately controlling the ratio of the raw materials and reaction conditions and adding specific auxiliaries. The prepared formaldehyde-free adhesive is remarkably improved in the aspects of viscosity, bonding strength, water resistance and other key properties, in the preparation process, parameters such as temperature, stirring speed and reaction time are elaborately optimized, nitrogen is introduced to keep an inert environment of a reaction system, and the formaldehyde-free adhesive is prepared. Side reactions such as oxidation are effectively prevented, and the quality and the stability of the product are improved. The optimized preparation process is simple to operate and easy to control, the production efficiency can be improved, the production cost can be reduced, and large-scale industrial production is facilitated.