62results about How to "Increased diffusion rate" patented technology

The invention relates to the technical field of lithium battery positive electrode material preparation, in particular to coated doped type lithium manganese iron phosphate gradient temperature control preparation equipment and method.The equipment comprises five temperature control bins arranged side by side, a sintering bin, a vertical flow guide plate, a unique temperature control gas inlet assembly and the like work cooperatively, the temperature control gas inlet assembly can flexibly adjust the gas state, and the temperature control gas inlet assembly can control the temperature of the lithium manganese iron phosphate; the preparation method comprises the following steps: firstly, mixing a lithium source, a manganese source and the like with a specific composite carbon source, and performing spray drying to obtain precursor particles; according to the preparation method, the defects of a traditional preparation technology in the aspects of temperature control and coating forming are overcome, accurate gradient temperature control can be achieved, the temperature uniformity can be improved, the coating effect can be optimized, and the preparation method is suitable for industrial production. And the performance of the lithium manganese iron phosphate positive electrode material is remarkably improved.

The invention provides a preparation method of a high-compaction high-capacity lithium iron phosphate material, which comprises the following steps: (1) mixing polyvinyl alcohol, iron phosphate, a lithium source, a carbon source and water to obtain slurry A; mixing iron phosphate, a lithium source, a carbon source and water to obtain slurry B; (2) performing spray drying on the slurry A, and performing low-temperature sintering to obtain a black material C; performing spray drying on the slurry B, and performing high-temperature sintering to obtain a black material D; and (3) mixing the black material C and the black material D, crushing, adding barium titanate, carrying out ball milling, and drying to obtain the lithium iron phosphate material. The polyvinyl alcohol is partially acetylated modified polyvinyl alcohol. The sintering temperature is reduced by adding the modified polyvinyl alcohol to prepare the compact lithium iron phosphate material with smaller particle size, and the lithium iron phosphate material and the lithium iron phosphate material obtained by high-temperature sintering form grading of large and small particles, so that the compaction density of the lithium iron phosphate is improved.

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 relates to the technical field of battery materials, in particular to a layered oxide positive electrode material, a preparation method thereof and application to a sodium battery. The expression of the layered oxide positive electrode material is: AB2Y2X2O12, wherein, A is a sodium storage layer site doping element, B is a transition metal layer cation site doping element, C is a transition metal layer anion site doping element, and Y is a shuttle ion doping element. In the charging and discharging process of the layered oxide positive electrode material, the shuttle ion shuttles between the transition metal layer and the sodium storage layer, which can improve the stability and sodium ion diffusion rate of the material, and effectively solve the problems of unstable iron-manganese-based layer oxygen circulation, low coulomb efficiency and slow sodium ion diffusion rate.

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.

The invention provides a metal / heteroatom co-doped silicon carbon negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium ion battery materials. The metal compound and heteroatoms are uniformly distributed on the porous carbon substrate in an in-situ growth doping manner, so that the electron conductivity of the material is improved, the diffusion rate of lithium ions in the material and on an interface is also improved, and the reaction kinetics of the silicon-carbon negative electrode material is further synergistically improved. Meanwhile, the prepared silane deposited silicon-carbon negative electrode material has good conductivity, high structural stability and long cycle life.

This utility model discloses a temperature and humidity control device for a constant temperature and humidity test chamber, including a test chamber body. A fixed frame is sleeved on the inner wall of the test chamber body. Several sets of baffles are rotatably connected to the inner wall of the fixed frame. A transmission component is sleeved on one end of each baffle. A connecting joint is sleeved on the inner bottom wall of the test chamber body. A branch pipe is connected through the top of the connecting joint. A diffusion component is connected through the top of the branch pipe. The transmission component includes a gear ring sleeved on one end of each baffle. This temperature and humidity control device for a constant temperature and humidity test chamber, through the setting of the transmission component and baffles, achieves the effect of adjusting the direction and position of hot air, effectively avoiding local temperature accumulation or dead zones. At the same time, based on the temperature detected by the temperature and humidity sensor, the data is fed back to the integrated controller. The integrated controller controls the exhaust fan speed and the baffle angle, enabling rapid response to changes in temperature and humidity setpoints, reducing system fluctuations, and improving dynamic balance efficiency.

The invention relates to the technical field of lithium ion batteries, and discloses a high-nickel ternary positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing and sintering a nickel-cobalt-manganese precursor, a lithium source, niobium salt and fused salt. According to the preparation method of the high-nickel ternary positive electrode material provided by the invention, the niobium salt and the molten salt form a liquid phase environment at a relatively low temperature, and the niobium element can efficiently enter a crystal lattice, so that uniform bulk phase doping in a real sense is realized, and the electrochemical stability and the thermal stability are improved; meanwhile, the niobium doping can ensure the rapid and uniform transmission of the lithium source, so that the lithiation is more sufficient, and the lithium-nickel mixed arrangement caused by lithium deficiency is reduced in dynamics.

The application relates to a secondary battery and a power consumption device, and belongs to the technical field of batteries. The secondary battery comprises a positive pole piece and a negative pole piece, the positive pole piece comprises a positive pole current collector and a positive pole active layer arranged on the surface of the positive pole current collector, the positive pole active layer comprises a positive pole active material; the negative pole piece comprises a negative pole current collector and a negative pole active layer arranged on the surface of the negative pole current collector, the negative pole active layer comprises a negative pole active material; and the secondary battery satisfies 0.14<=Z<=4.67; wherein Z=(n1 / n2)*(p1 / p2). The secondary battery can maintain high energy density, and has good fast charging performance and long cycle life.

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.

The invention relates to the cross technical field of sodium-ion batteries and glass preparation, in particular to a sodium-ion battery negative electrode material and a preparation method thereof, and the sodium-ion battery negative electrode material comprises a current collector and a composite active coating attached to the current collector; the composite active coating is formed by coating and drying slurry, and the slurry comprises a glass material, a conductive material and a binder. According to the invention, the glass material is introduced into the composite active coating, so that the structural stress in the sodion deintercalation process is effectively buffered, and the phase change and structural collapse of the electrode material are inhibited, thereby remarkably improving the cycling stability; meanwhile, the ion diffusion rate and the electron conduction efficiency are enhanced and the rate capability and the capacity performance are improved by a three-dimensional conductive network formed by the glass material, the conductive material and the binder in a synergistic manner, the overall preparation process is simple, the cost is relatively low, and a feasible material solution is provided for high-performance application of the sodium-ion battery in the field of large-scale energy storage.

The invention discloses a negative electrode material and a preparation method and application thereof. The preparation method of the negative electrode material comprises the following steps: carbonizing a mixture containing graphite and a coating agent, wherein the coating agent comprises a molecular sieve and liquid phase pitch; the mass ratio of the molecular sieve to the liquid phase pitch is 5-25%; the mass ratio of the coating agent to the graphite is 1%-15%. The negative electrode material comprises a graphite matrix and a composite coating layer coating the surface of the graphite matrix, the composite coating layer comprises amorphous carbon and a molecular sieve skeleton, and the composite coating layer contains pores; wherein the mass ratio of the composite coating layer to the graphite matrix is 1%-15%. The preparation method can optimize the pore size and other parameters of the obtained negative electrode material and the comprehensive performance of the obtained battery, and also has the advantages of low cost, simple process, easy large-scale production and the like.

The application relates to a micro-micro-mesoporous composite pore system ZSM-5 molecular sieve and a synthesis method and VOCs adsorption application thereof. On the basis of maintaining original micropore structure, a second micropore structure and a mesopore structure are introduced, wherein the original micropore structure can adsorb small molecules such as dichloromethane, the newly introduced second micropore structure can adsorb macromolecules such as m-xylene, the mesopore structure can improve the molecular diffusion rate, reduce the desorption temperature and improve the desorption speed. The application also relates to a preparation method of the material, mainly adopting an inorganic cation or a surfactant-mediated molecular sieve controllable desilication method. The material shows higher adsorption capacity and lower desorption temperature in the adsorption process of VOCs with a relatively wide boiling point distribution.

The invention relates to the technical field of battery materials, in particular to a preparation method of an alpha-zirconium phosphate coated ternary positive electrode material, which comprises the following steps: S1, dissolving and mixing a zirconium source and a phosphorus source, and then introducing into preparation equipment for gelation reaction to obtain a precursor; wherein the preparation equipment detects the viscosity change of reactants in the gelation reaction process in real time, the gelation reaction process is divided into different stages according to the viscosity change, and the corresponding stirring speed and temperature are adjusted according to the different stages; s2, outputting the precursor obtained in S1 from preparation equipment, washing and drying, and calcining at high temperature for 2-6 hours to obtain the alpha-zirconium phosphate nanosheet; and S3, mixing and ball-milling the alpha-zirconium phosphate nanosheet and the ternary positive electrode material in an ethanol medium, and drying to obtain the alpha-zirconium phosphate coated ternary positive electrode material. According to the preparation method of the alpha-zirconium phosphate coated ternary positive electrode material, provided by the invention, the alpha-zirconium phosphate coated ternary positive electrode material can be simply and quickly obtained, and the preparation method has a good application value.

This invention provides a waste paper pulp decolorization and color adjustment device, relating to the field of waste paper pulp recycling technology. It includes: a processing tank; a top support frame fixedly installed on the top of the processing tank; a vertical rotating shaft connected inside the processing tank and connected to the top support frame; a drive motor fixedly installed outside the processing tank; a synchronous belt connected to the top of the drive motor and connected to the top of the vertical rotating shaft; and a planetary rotating frame connected to the outside of the vertical rotating shaft, located inside the top of the processing tank. The drive motor, through the transmission action of the synchronous belt, drives the vertical rotating shaft to rotate, causing the large impeller on the vertical rotating shaft to rotate accordingly. This efficiently mixes and stirs the waste paper pulp inside the processing tank, effectively accelerating the flow rate of the waste paper pulp within the tank. This solves the problem in the bleaching and decolorization process of waste paper pulp where it is difficult to achieve sufficient and uniform mixing of the bleaching agent and the waste paper pulp, easily leading to inconsistent decolorization results.

The invention discloses a doped iron hydrogen phosphate precursor and a preparation method and application thereof.The preparation method of the doped iron hydrogen phosphate precursor comprises the steps that a solution containing a phosphorus source and a solution containing an oxidizing agent are added into a solution containing an iron source and a metal doping source respectively, a reaction is conducted, and a reaction solution is obtained; and adjusting the reaction liquid to be acidic, aging, and carrying out solid-liquid separation to obtain the doped iron hydrogen phosphate precursor. According to the preparation method, the metal doping source is added into the reaction liquid for preparing the iron hydrogen phosphate precursor to prepare the doped iron hydrogen phosphate precursor, so that the distribution uniformity of metal doping ions in the iron hydrogen phosphate precursor is effectively improved, and the problem of relatively poor ion uniformity of the iron hydrogen phosphate precursor prepared by a solid-phase reaction method is effectively solved; the intrinsic electron conductivity of the material and the diffusion rate of sodium ions are further improved, so that the electrochemical performance of the material is favorably improved.

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.

The invention provides a preparation method of a room-temperature ammonia gas sensor based on oxide sol-gel and the sensor, which can be applied to the technical field of gas sensors and the technical field of micro-nano sensors. The preparation method comprises the following steps: irradiating a substrate through laser, and performing in-situ preparation on the surface of the substrate to obtain at least two patterned laser-induced graphene electrodes; the preparation method comprises the following steps: dissolving a precursor of a multi-element metal oxide in a target solvent to prepare a multi-element oxide sol-gel mixed solution with target concentration; coating a multi-element oxide sol-gel mixed solution with target concentration on the area where the at least two laser-induced graphene electrodes are formed, and forming a multi-element sol-gel film covering the at least two laser-induced graphene electrodes and the area between the electrodes; and irradiating the multi-element sol-gel film by using laser, and adjusting the laser irradiation power in the irradiation process so as to convert the multi-element sol-gel film into the nano-particles with ammonia gas sensitivity.

The invention provides a positive electrode material, a secondary battery and an electric device, and belongs to the technical field of electrochemical energy storage. According to the positive electrode material, the coating layer containing the nickel cobalt lithium manganate is arranged on the surface of the manganese iron lithium phosphate, the unit cell parameter a-axis length of the manganese iron lithium phosphate is controlled to be a1nm, the unit cell parameter c-axis length of the nickel cobalt lithium manganate is controlled to be c1nm, the unit cell parameter c-axis length of the nickel cobalt lithium manganate is controlled to be c2nm, and the condition that c2 / (a1 + c1) is larger than or equal to 0.98 and smaller than or equal to 1.02 is met, so that lithium diffusion channels of the manganese iron lithium phosphate and the nickel cobalt lithium manganate can be fused into a whole; the lithium diffusion rate is improved, and the rate capability of the secondary battery comprising the positive electrode material is improved.

This invention discloses a manganese-based cathode material for zinc-ion batteries, its preparation method, and its application. The cathode material is a composite material formed by adding a metaborate-based compound to a manganese-based oxide. The metaborate-based compound includes at least one of seven compounds: lithium metaborate, sodium metaborate, potassium metaborate, iron metaborate, magnesium metaborate, manganese metaborate, and aluminum metaborate. The manganese-based oxide includes at least one of nine compounds: α-MnO2, β-MnO2, γ-MnO2, δ-MnO2, T-MnO2, λ-MnO2, Mn2O3, Mn3O4, and ZnMn2O4. The metaborate ion can react on the surface of the manganese-based cathode material to form a boron-containing protective layer, thereby inhibiting the excessive formation of by-reaction products and manganese dissolution. This enhances the structural stability of the manganese-based cathode material and improves its cycle and rate performance in zinc-ion batteries.

The application discloses a heavy oil efficient conversion combined technology, and the process comprises the following contents: (1) obtaining unconverted oil after heavy feedstock is subjected to ebullated bed hydroprocessing; the unconverted oil has the following properties: the mass content of n-heptane asphaltene is 1.0%-9.0%, preferably 5%-8%; the sulfur content is 0.3%-1.5%, preferably 0.8%-1.2%; the metal (Ni+V+Fe) content is 30 mg / kg-120 mg / kg, preferably 60 mg / kg-90 mg / kg; (2) the unconverted oil in step (1) enters a solvent extraction unit to obtain a raffinate phase, a solvent and a mixed stream of an extract phase, then the solvent and the extract phase are separated to recover the solvent and obtain the extract phase of a rich alkane component; (3) the raffinate phase in step (2) enters a coking unit to perform green coke reaction, and low-sulfur petroleum coke and a gas-liquid mixed stream are obtained, the gas-liquid mixed stream enters a coking separation unit to obtain coking gas, coking naphtha, coking diesel and coking wax oil. The method can greatly improve the overall conversion rate of residual oil, and simultaneously produce negative electrode coke and high-viscosity-index high-quality heavy lubricating oil raw materials.

This invention discloses a CNT composite negative electrode sheet for sulfide all-solid-state batteries and its preparation method, belonging to the field of all-solid-state battery technology. The negative electrode sheet includes a negative current collector and an active modification layer loaded on its surface. The active modification layer is composed of a binder, metal nanoparticles, a carbon conductive phase, and a CNT supporting phase. The mass ratio of metal nanoparticles, carbon conductive phase, and CNTs is (0.5–4):(5–7):(0.2–1), and the binder content accounts for 3 wt%–10 wt% of the dry weight of the modification layer. The preparation method employs a two-step ball milling method: first, the solvent and each powder are pre-mixed and ball-milled; then, a binder slurry is added and ball-milled a second time. The resulting slurry is coated onto the surface of the current collector and dried to obtain the electrode sheet. This invention constructs a three-dimensional network structure using CNTs, enhancing the mechanical strength of the modification layer and inducing uniform lithium deposition, effectively suppressing lithium dendrite growth. This technology is simple, provides uniform dispersion, and can significantly improve the cycle stability and safety performance of sulfide all-solid-state batteries, making it suitable for high-energy-density energy storage scenarios.

The invention discloses a lithium iron phosphate positive electrode material, a preparation method thereof and a battery, and belongs to the technical field of batteries, the preparation method comprises the following steps: mixing an iron source, a lithium source, a phosphorus source, a dopant and a grinding agent, and carrying out dry ball milling to obtain precursor powder; and sintering the precursor powder under the protection of inert gas to obtain the lithium iron phosphate positive electrode material. According to the method, high-purity graphite / acetylene black is used as a grinding agent and a carbon source, a doping agent is added at the same time, a solvent does not need to be used, a ball-milled material does not need to be dried, uniform compounding of a precursor and construction of a conductive network are achieved in one step through the mechanochemical effect, and then the conductive network is obtained through high-temperature sintering. The prepared lithium iron phosphate positive electrode material has excellent electrochemical performance and relatively high compaction density, and still keeps relatively good electrochemical performance in a low-temperature environment, so that a new development direction is provided for production of lithium iron phosphate.

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.

The invention discloses a potassium ion battery dual-binary alloy negative electrode and a preparation method and application thereof. The dual binary alloy negative electrode is obtained by dissolving commercial SbCl3, BiCl3 and CuSO4 in an acidic aqueous solution and then carrying out one-step substitution reaction through iron powder. The method is simple in process, low in cost and good in operability and repeatability, and the prepared material is high in parameter proportion adjustability. When used as the negative electrode of the potassium ion battery, the material has the advantages of improving volume expansion in an alloying process, accelerating transmission of potassium ions in a charging and discharging process and the like, and can be potentially applied to the negative electrode of the potassium ion battery in a large scale.

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.