23results about How to "Increased diffusion rate" patented technology

The application provides a positive electrode sheet, a battery and an electric device. The positive electrode sheet comprises a lithium iron manganese phosphate material, the X-ray crystal diffraction spectrum of the positive electrode sheet comprises a characteristic peak of a (200) crystal face with 2θ of 17.2±0.5° and a characteristic peak of a (020) crystal face with 2θ of 29.7±0.5°; the average stacking size D(200) on the (200) crystal face, the average stacking size D(020) on the (020) crystal face and the average particle size D 平均 satisfy the following relationships: D(200) / D(020)≥1.15 and 10%≤D(200) / D 平均 ≤30%. The application makes the positive electrode sheet have high lithium ion diffusion rate and cycle stability by special crystal structure and particle size limitation, and further makes the battery have excellent cycle performance and rate performance.

The application discloses a low-temperature ion nitriding method and application. The low-temperature ion nitriding method comprises the following steps: under a selected temperature condition, ion etching treatment is performed on the surface of a workpiece by adopting an arc-enhanced glow discharge process, and then plasma nitriding treatment is performed on the workpiece by adopting an arc-enhanced plasma process to obtain a nitriding workpiece; wherein, a positive and negative alternating voltage is applied to the workpiece in the arc-enhanced plasma process. The low-temperature ion nitriding method provided by the application can realize nitriding at a lower temperature, effectively improves the deformation degree of the workpiece, and is widely applicable to surface strengthening of cutters, molds and metal parts.

The application belongs to the technical field of battery materials, and particularly relates to a Prussian blue-like nano positive electrode material, a preparation method thereof and a sodium ion battery. x M y [Fe(CN)6] z , wherein M is a transition metal element, and 0

The application relates to the technical field of electroplating, and discloses a chromium electroplating process for improving the hardness of a connector terminal, which comprises the following steps: performing surface pretreatment on the connector terminal, removing surface impurities through ultrasonic cleaning and micro-etching treatment; performing heating treatment on the connector terminal; performing electroplating treatment on the connector terminal by using an electroplating solution comprising trivalent chromium salt, boron nitride nanoparticles, ferroferric oxide nanoparticles, nickel ions, sodium dichromate and chromium alloy additives, so as to form a chromium plating layer; performing passivation treatment on the plating layer; performing low-temperature treatment on the plating layer; and spraying a protective layer on the chromium plating layer. Through the trivalent chromium salt and the sodium dichromate, the trivalent chromium salt is used to reduce hexavalent chromium ions into trivalent chromium, the toxicity of the hexavalent chromium is reduced, the sodium dichromate is used to provide a stable chromium source, the deposition of chromium elements in the electroplating process is ensured, the pollution of hexavalent chromium to the environment and the harm of hexavalent chromium to the health of operators are solved, and the environmental protection and safety of the electroplating process are improved.

This invention relates to the field of titanium alloy chemical heat treatment technology, specifically to a method for preparing a nitrided layer in titanium alloy using ion implantation-assisted plasma nitriding and its application. First, the titanium alloy is polished. Then, different dosages of Ti-La elements are implanted into the surface of the titanium alloy using ion implantation technology. Finally, the implanted titanium alloy is subjected to plasma nitriding. The purpose of this invention is to pre-introduce vacancies, dislocations, and other crystal defects on the surface of the titanium alloy using high-energy ion implantation technology, increasing the nitrogen diffusion channels during the nitriding process and improving nitriding efficiency. Under the same nitriding conditions, a thicker nitrided layer can be achieved. Simultaneously, the extremely fine nitride nucleation formed on the surface under the catalysis of La results in a denser surface, achieving higher surface hardness under the same conditions. This helps improve the mechanical, tribological, and fatigue properties of titanium alloys, and can be applied in aerospace, biomedical devices, and marine equipment fields.

This invention relates to the field of catalyst technology, specifically a magnesium-modified hierarchical ZSM-5 molecular sieve catalyst, its preparation method, and its application. This magnesium-modified hierarchical ZSM-5 molecular sieve catalyst is prepared using the organic template agent N,N-dimethyldipropyltriamine, exhibiting a 90° cross-linked hierarchical structure. This structure enhances the diffusion rate of reactants and products, thereby improving catalytic activity. Furthermore, it possesses a large specific surface area, a short diffusion path, and good stability. The interconnected hierarchical pores of the molecular sieve allow for full utilization of their diffusion characteristics, resulting in excellent catalytic performance in the catalytic cracking of heavy oils. Additionally, the organic template agent used in this invention is significantly cheaper than the template agents used in the synthesis of specially morphological hierarchical porous molecular sieves in current literature, effectively solving the problem of poor catalytic performance and the difficulty in widespread application due to the use of expensive template agents in existing catalysts.

This invention discloses a method for preparing Zr-2.5Nb alloy by hot-pressing sintering coarse-grained pre-alloyed spherical powder below the β phase transformation temperature. The method includes: 1. Selecting coarse-grained spherical Zr-2.5Nb alloy pre-alloyed powder prepared by the plasma rotating electrode method as raw material; 2. Placing the raw material into a mold and placing it in a hot press furnace under vacuum; 3. Heating to a temperature below the β phase transformation temperature of Zr-2.5Nb alloy and holding at that temperature for hot-pressing sintering; 4. Cooling to room temperature to obtain a dense Zr-2.5Nb alloy. This invention utilizes the characteristics of coarse-grained spherical Zr-2.5Nb alloy pre-alloyed powder—namely, its fine grain structure, crystal defects, and metastable α′ martensitic phase transformation activity—to achieve efficient densification at lower temperatures and suppress grain coarsening, resulting in a Zr-2.5Nb alloy material with uniform structure, high density, and excellent overall performance, suitable for the field of biomedical implants.

This invention provides a short-process manufacturing technology for high-performance titanium-aluminum alloys, relating to the technical field of titanium-aluminum alloy material preparation. The manufacturing technology uses hydrogenated dehydrogenated powder, aluminum-vanadium alloy, and aluminum-niobium alloy as raw materials. Through hydrogenated dehydrogenation powder preparation, cold isostatic pressing, vacuum sintering, and subsequent processing, a uniformly composed titanium-aluminum alloy is prepared. Utilizing the intrinsic brittleness of titanium-aluminum after its self-propagating reaction, and combining the high purity and easily breakable characteristics of aluminum-vanadium and aluminum-niobium master alloys, the technology achieves thorough mixing and refinement of multiple elements under solid-state conditions. This avoids the microstructure inhomogeneity caused by diffusion limitation in high-vanadium and high-niobium systems, and overcomes the problems of component segregation, coarse microstructure, and difficulty in removing inclusions associated with traditional casting methods for preparing titanium-aluminum alloys. Through the powder metallurgy short-process manufacturing design, this technology offers significant technical advantages in reducing raw material and manufacturing costs, improving compositional and microstructure uniformity, enhancing comprehensive mechanical properties, and achieving large-scale production.

This invention relates to a pretreated reinforced recycled aggregate concrete and its preparation method, comprising the following raw materials: 320-360 parts cement; 20-40 parts fly ash; 80-120 parts mineral powder; 585-670 parts manufactured sand; 1050-1200 parts recycled coarse aggregate; 156-172 parts water; and 11-12.3 parts admixtures. After pretreatment, the concrete prepared from the recycled coarse aggregate exhibits significantly improved performance compared to the untreated recycled coarse aggregate. The synergistic effect of multiple pretreatment methods significantly improves the water absorption, crushing index, and apparent density of the raw coarse aggregate. Pretreatment of the recycled coarse aggregate provides enhanced conditions for internal hydration in the recycled concrete and simultaneously improves the surface roughness of the recycled coarse aggregate, thus enhancing the workability and increasing the strength of the concrete.

This invention relates to the field of anode materials, specifically to an antimony-based anode material, its preparation method, and a lithium-ion battery. The method involves preparing Schiff base-functionalized carbon quantum dots by adding a phosphorus source, an antimony source, and the Schiff base-functionalized carbon quantum dots to a reaction solvent, followed by a solvothermal reaction. This antimony-based anode material achieves a synergistic improvement in high specific capacity, long cycle life, excellent rate performance, and high structural stability, making it a highly promising anode material for lithium batteries, particularly suitable for high-energy-density, long-life lithium-ion batteries.

The present application relates to lithium battery electrode material technical field, specifically to a kind of fluidized bed element doped silicon-carbon negative electrode material and its preparation method, lithium battery;Preparation method includes: the boron lithium compound is placed in heating container, inert carrier gas is imported, heating makes it be gaseous form, carrier gas is connected fluidized bed reactor gas path, gaseous boron lithium compound is imported into the fluidized bed that has been ahead of time into porous carbon, boron lithium element co-doping is carried out;Then again pass into silane mixed gas, gas phase cracking deposition silicon, form boron lithium element co-doped silicon-carbon material, or the addition timing of silane mixed gas is same with the addition timing of gaseous boron lithium compound;Finally pass into carbon source, carry out CVD carbon coating;The carbon-coated boron lithium element co-doped silicon-carbon material prepared by the present application can improve ion diffusion rate and electronic conductivity, significantly improve battery kinetics and initial efficiency.

This disclosure provides a method for unsealing decompressed photovoltaic (PV) laminates, belonging to the field of PV module recycling technology. The method uses a solution comprising terpinene, isopropanol, and lauroyl sarcosine as the unsealing agent to disrupt the cross-linked network structure of EVA, causing EVA to lose its adhesiveness and releasing the EVA. This achieves complete separation of the backsheet, glass, and silicon layer in the decompressed PV laminate, facilitating the subsequent recycling of organic and metal resources from the backsheet. The entire process is green, efficient, and produces no secondary pollution. The unsealing agent can be recovered and recycled through distillation and condensation, resulting in significant economic benefits.

This invention relates to a deep purification process for aluminum hydroxide seeds in alumina production, belonging to the field of alumina production technology. The process includes: primary hot water washing, secondary hot water washing, and stop determination. The deep purification process for aluminum hydroxide seeds protected in this application innovatively performs precise washing of aluminum hydroxide seeds, ensuring that the aluminum hydroxide seeds are free of oxalate before decomposition, thereby improving seed purity and decomposition activity, and completely preventing the negative impact of oxalate accumulation on product quality and production efficiency.

This invention belongs to the technical field of comprehensive utilization of phosphorus iron slag and lepidolite, specifically disclosing a rubidium- and cesium-doped lithium iron phosphate material, its preparation method, and its application. The rubidium- and cesium-doped lithium iron phosphate cathode material provided by this invention has a Li, Rb, and Cs mass ratio of 4:(0.3~0.9):(0~0.6). Specifically, lepidolite powder is roasted with concentrated sulfuric acid to obtain roasted slag, which is then treated with water to obtain a lithium-containing solution. Finally, the lithium-containing solution is mixed with phosphorus iron slag and subjected to a hydrothermal reaction to prepare the lithium iron phosphate material. This invention innovatively demonstrates that under hydrothermal reaction conditions, the lithium extraction solution from lepidolite can react with phosphorus iron slag in situ to generate rubidium- and cesium-doped lithium iron phosphate, improving the recycling performance of lithium iron phosphate and achieving high-value utilization of waste residue.

The utility model discloses a traditional Chinese medicinal material active ingredient extraction device relates to traditional Chinese medicinal material extraction technical field, including broken grinder frame, broken grinding motor box, vibration frame, component extraction frame and stirring motor box, start stirring motor, heating element, temperature sensor and solenoid valve drive part, the output shaft of stirring motor drives stirring driving axle high -speed rotation through the shaft coupling, the component of first chain sprocket drive part is same with second chain sprocket drive part, the power of stirring driving axle is synchronous with stirring driven axle, and the ball bearing of driven axle is the friction resistance when reducing stirring driven axle rotation, ensures rotation steady, and the outer wall surface upside and downside of stirring driving axle and stirring driven axle are installed stirring piece, and stirring piece rotates with driven axle, simultaneously, the operator injects solvent mixture through the liquid injection pipe welding of component extraction frame left end upper side through -penetrating place, makes to medicine and solvent mixture and turns over, breaks partial concentration difference.

This utility model relates to the field of chemical wastewater treatment technology and discloses an anode-cathode bed with a function to shorten regeneration time. The bed includes a cathode bed body, with a second motor fixedly installed on the top of the body. A cam is fixedly mounted on the power output shaft of the second motor. This anode-cathode bed with shortened regeneration time function, through a control controller, uses a third motor to drive a stirring rod to rotate, causing the stirring rod to agitate the regenerated liquid inside the cathode bed body. The second motor drives the cam to rotate, causing the cam to move up and down on the inner wall of the cathode bed body via a rotating plate. This allows the mounting rod to drive a scraper to thoroughly scrape and agitate the inner wall of the cathode bed body, preventing the regenerated liquid from adhering to the inner wall. A locking block engages with a locking slot; when the locking block is pressed by external force, it resists a spring, disengaging from the slot. This allows the scraper to disengage from the mounting rod via a sealing plate, facilitating disassembly and replacement by personnel according to usage conditions.

The application discloses a phosphate-based positive electrode material, a preparation method thereof, a positive electrode sheet and a battery. The preparation method of the phosphate-based positive electrode material comprises the following steps: preparing a solid-phase precursor material by using raw materials containing an iron source, a phosphorus source, a lithium source, a first carbon source and a doping element source; placing the solid-phase precursor material in a non-active atmosphere, pre-sintering the solid-phase precursor material at 500-600 DEG C for 6-12 hours to obtain a semi-finished product; placing materials containing the semi-finished product in a non-active atmosphere, performing gradient sintering, and then reducing the temperature to 20-30 DEG C at a rate of 0.5-3 DEG C / min to obtain the phosphate-based positive electrode material; and the doping element source accounts for 0.5wt%-1.5wt% of the total mass of the phosphate-based positive electrode material. According to the embodiment of the application, the crystallinity in the crystal can be controlled, so that the cycle stability of the phosphate-based positive electrode material is effectively improved.

The application discloses a kind of polybenzodifuranone and its constant potential polymerization preparation method, belong to organic conductive polymer material preparation technical field, benzodifuranone (BFDO) and supporting electrolyte are dissolved in polar aprotic solvent, and electrolyte is obtained by mixing uniformly;With platinum metal electrode as working electrode and counter electrode, with saturated calomel electrode as reference electrode, three electrodes are connected with direct current power supply and are placed in the electrolyte, in air atmosphere, electrochemical polymerization reaction is carried out using constant potential method;After reaction, the reaction liquid is extracted and filtered, dried, to obtain polybenzodifuranone (PBFDO).The application uses constant potential electrochemical polymerization method, n-type conductive polymer polybenzodifuranone can be synthesized in air atmosphere in one step, without catalyst, high-temperature anaerobic environment and complex post-processing, the product conductivity is 1.157-18.28 S / cm.Process simplification, low cost, process controllable, can realize green scale preparation and industrialization application.

The application belongs to the technical field of sodium ion batteries, and discloses a preparation method of a double-site co-doped sodium ion battery positive electrode material. The method comprises the following steps: (1) according to the molar ratio of each metal element in the chemical formula of the target product, corresponding metal salts are weighed and dissolved in an ethanol solution to obtain a metal salt solution; oxalic acid is dissolved in an ethanol solution to obtain an oxalic acid solution; (2) under ultrasonic conditions, the metal salt solution is added dropwise into the oxalic acid solution, and stirring is continuously performed; after the metal salt solution is completely added dropwise, ultrasonic treatment is continuously performed; the suspension treated by ultrasonic treatment is placed in an oven for drying, and the powder obtained by drying is ground; (3) the ground powder is placed in a corundum box and then placed in a tube furnace for sintering; first, heating is performed to 500 DEG C for heat preservation; after cooling, the tablet is taken out, the pressed tablet is continuously placed in the tube furnace, heating is performed to 900 DEG C for heat preservation, after cooling, the tablet is taken out and ground, and the target product is obtained.

This invention discloses a lithium iron phosphate cathode material, its preparation method, and a lithium-ion battery. The preparation method includes the following steps: preparing a particle size D50 of 1... D1 Large-particle-size lithium iron phosphate cathode material; preparation of particle size D50 is I D2 Small-particle-size lithium iron phosphate cathode material; the two are mixed and carbon-coated to obtain lithium iron phosphate cathode material; wherein, the residual carbon content of the first carbon source is less than that of the second carbon source; the volume fraction of the small-particle-size lithium iron phosphate cathode material is X2, I=I D1 ×(1-X2)∕[8×(X2×I] D2 )], 0 < I < 3. The method of the present invention grades large and small lithium iron phosphate cathode materials with carbon coating, limiting I D1 I D2 The relationship with X2, and carbon coating after gradation, improve the compaction density, electronic conductivity and lithium-ion diffusion rate of the material, thereby improving the electrical performance of lithium iron phosphate cathode material.

This invention provides a novel method for preparing a self-supporting porous supercapacitor material, belonging to the field of supercapacitor electrode materials. The preparation method includes the following steps: immersing nickel foam in a corrosion solution containing iron salts and a sulfur source, then placing it within the coil of an alternating magnetic field induction heating device for in-situ corrosion reaction, generating an Fe-doped nickel-based composite on the pore walls of the nickel foam, thus obtaining a precursor; drying and oxidizing the precursor to obtain the novel self-supporting porous supercapacitor material; the sulfur source includes one or both of thiosulfate and thiourea; the nickel-based composite includes Ni(OH)₂ and Ni₃S₂; the nickel-based composite is a porous structure composed of nanoclusters; adjacent pores in the porous structure are interconnected. The synergistic effect of the thermal, electric, and magnetic fields of the alternating magnetic field accelerates corrosion kinetics, promotes the formation of a bicontinuous porous structure, and enhances the electrochemical energy storage performance of the material.

The application provides a method for connecting titanium aluminum carbide and niobium by adopting a titanium intermediate layer and a connected joint, and relates to the technical field of welding. The method comprises the following steps: S1, preparing a component to be connected; the component to be connected is formed by sequentially stacking titanium aluminum carbide base material, an intermediate layer and niobium base material from top to bottom, and the material of the intermediate layer is titanium; S2, performing discharge plasma sintering on the component to be connected under a preset air pressure to obtain a connected joint. By adopting the method, the cracking of the joint can be inhibited, the decarburization or Al evaporation of Ti3AlC2 at high temperature can be inhibited, thereby the deterioration of the base material is inhibited; the generation of brittle intermetallic compounds can be avoided, which is helpful to improve the interface bonding strength, thereby the strength of the connected joint is improved.