32 results about "Ionic diffusion" patented technology

This invention belongs to the field of hydraulic structure analysis technology, specifically disclosing a gravity dam coupling analysis method, system, electronic equipment, and storage medium, including: models describing water flow in concrete, the relationship between water pressure and stress, the dissolution reaction process, and the coupling of ion diffusion with water flow. By acquiring influencing variables, parameters of each model are correlated, and a solubility function considering performance parameters is established and dynamically updated. The solubility function is iteratively trained using experimental data to construct a finite element model, and simulations are performed based on the trained function. Early warnings are generated based on the simulation results to predict the concrete deterioration process and optimize maintenance decisions. It has the following advantages: by coupling multiple models such as water flow, chemical dissolution, and hydraulic fracturing, the long-term deterioration process of concrete under the action of water flow and dissolution is accurately simulated. The introduction of a solubility function and dynamic updating of material parameters, considering time-varying deterioration effects, comprehensively improves the accuracy of deterioration prediction and simulation results.

The application relates to a high-capacity porous niobium pentoxide material and a preparation method and application thereof, relates to niobium pentoxide and preparation and application thereof, and aims to solve the technical problems of low conductivity and slow ion diffusion of existing orthogonal phase niobium pentoxide materials. The material is formed by interconnection of 100-300 nm niobium pentoxide matrix nanoparticles, growth of 10-30 nm secondary nanoparticles on the surface, and a 'raspberry-like' multi-level assembly morphology; the material has a pore diameter of 2-20 nm, a specific surface area of 15-45 m 2 / g; and has an orthogonal phase niobium pentoxide structure and carbon doping characteristics. The material is prepared by using a surfactant containing a quaternary ammonium cation as a soft template, utilizing electrostatic-coordination synergistic action to drive niobium salt and organic quaternary ammonium cation assembly, and high-temperature sintering in an inert atmosphere. When used as a negative electrode of a lithium ion battery, the material reaches a capacity of 350 mAh / g at a current density of 0.1 A / g, and can be used in the field of fast-charging type alkali metal ion batteries.

A composite cathode material precursor, its preparation method, and its application are disclosed. The composite cathode material precursor comprises an N-doped iron phosphate core and an M-doped iron phosphate coating layer covering the surface of the iron phosphate core. The N element includes at least one selected from Mn, Ni, Co, Cr, V, Mg, Sr, Nb, La, Nd, Ce, and Y, and the M element includes at least one selected from Al, Ti, and Zr. By introducing doping elements N and M into the core and coating layer of the cathode material precursor, respectively, the crystal structure of iron phosphate can be adjusted, improving its conductivity and ion diffusion rate. Furthermore, the doping elements N and M form a synergistic effect in the composite cathode material precursor, comprehensively improving the structural stability, cycle life, ion transport rate, and electrochemical performance of the cathode material by optimizing the crystal nucleus structure, enhancing the stability of the coating layer, and regulating the electronic structure.

The invention relates to the technical field of electrochromic materials and glass preparation, in particular to a preparation method of sandwich type all-solid-state inorganic electrochromic glass which is formed by sequentially compounding a tempered glass layer, a film layer and an electrochromic film layer pile. The thickness of the tempered glass layer is 4 mm, and the film layer is a PVB film and is 0.76 mm thick. The electrochromic film layer stack takes sodium-calcium non-tempered glass with the thickness of 3mm as a substrate, and an anti-ion diffusion layer, a first conductive layer, a first resistive layer, a negative electrode color changing layer, a second resistive layer, a positive electrode color changing layer, a third resistive layer, a second conductive layer and an outermost protective layer are sequentially arranged on the surface of the substrate from inside to outside; the anti-ion diffusion layer is a silicon dioxide layer, and the thickness is 200 nm. According to the preparation method of the sandwich type all-solid-state inorganic electrochromic glass provided by the invention, through precise design of each film layer structure of the glass and gradient optimization of a preparation process, the comprehensive performance of a product is synergistically improved, and many problems in the prior art are effectively solved.

The application relates to a supercapacitor electrode material CNT@M-Ni-OH and a preparation method and application thereof, which comprises the following steps: (1) modifying carbon nanotubes by using a modifier to obtain modified carbon nanotubes; (2) growing microporous MOFs on the modified carbon nanotubes by using a solvothermal or hydrothermal method to obtain a carbon nanotube@MOF composite material; and (3) preparing an electrode material CNT@M-Ni-OH by mixing a dispersion liquid of the carbon nanotube@MOF composite material with a nickel salt solution and performing a hydrothermal reaction, wherein M is a metal ion in the MOFs. The material is a core-shell structure formed by a large number of nanosheet-shaped hydroxides coated around CNTs, can provide more contact areas with electrolytes, promotes ion diffusion, and meanwhile, the CNTs can effectively improve the conductivity of the electrode material and improve electrochemical performance.

The application relates to the technical field of permanent ferrite preparation, in particular to a method for preparing strontium ferrite by a multi-field coupling auxiliary molten salt method. First, a chemical coprecipitation method is improved to obtain a mixture containing an excess precipitant, inorganic salt and strontium ferrite precursor; then the mixture is subjected to heat treatment under multi-field coupling; finally, strontium ferrite powder is obtained after washing and drying. The application simplifies the chemical coprecipitation process, avoids Sr loss and realizes in-situ salt formation; a multi-element molten salt system is constructed during heat treatment, and an alkali-containing molten salt system with activation is proposed; in the molten salt liquid phase environment, multi-physical fields such as magnetic fields and ultrasonic vibration force fields are cooperated to control the orientation and growth of grains, new driving force and fast channels are provided for ion diffusion, and the rapid synthesis of strontium ferrite and the control of microstructure and size are realized in a low temperature and short time.

The application provides a co-doped lithium iron phosphate material and a preparation method and application thereof. The co-doped lithium iron phosphate material comprises iron site doping elements and lithium site doping elements. The content of the iron site doping elements in the co-doped lithium iron phosphate material is I F , the content of the lithium site doping elements in the co-doped lithium iron phosphate material is I L , I F and I L satisfy the following relationship: I = 4 x (I F 2 / I L ) / 9(I F +I L ), wherein 0 < I ≤ 1. The co-doped lithium iron phosphate material is co-doped at the lithium site and the iron site, and the relationship between the doping contents is reasonably controlled, so that the ion diffusion rate and the conductivity of the material are improved, and meanwhile, the capacity of the lithium iron phosphate material is normally exerted, and the cycle service life is not affected.

A semiconductor structure and a method for forming the same are disclosed. The method includes forming a diffusion barrier layer on a substrate. The step of forming the diffusion barrier layer includes: forming a first diffusion barrier layer on the substrate at a first preset temperature; and forming a second diffusion barrier layer on the first diffusion barrier layer at a second preset temperature. The first preset temperature is lower than the second preset temperature. Because the first preset temperature is lower than the second preset temperature, the rate of forming the first diffusion barrier layer is lower, resulting in an increased time for forming the first diffusion barrier layer. This allows dopant ions in the embedded layer more time to diffuse and distribute within the substrate, resulting in a more uniform concentration distribution of dopant ions in the embedded layer within the substrate. This reduces the concentration gradient of dopant ions in the substrate, thereby reducing the probability of dopant ions in the embedded layer diffusing to the substrate surface. In subsequent process steps, this increases the probability of neutralization between dopant ions in the epitaxial layer and dopant ions in the embedded layer.

The application discloses a marine pipe pile chloride ion diffusion analysis method and system, wherein the method steps comprise the following steps: acquiring marine pipe pile parameters of a marine pipe pile to be detected; obtaining a chloride ion diffusion analysis equation considering time-varying surface chloride ion concentration based on the marine pipe pile parameters; and completing chloride ion diffusion analysis in the interior of the marine pipe pile to be detected based on the chloride ion diffusion analysis equation. The surface chloride ion concentration of the analysis method is related to time, and the chloride ion transmission condition of the marine pipe pile under different surface chloride ion concentration conditions can be simulated.

The application discloses an ethanol synergistic solvent-thermal in-situ phosphorization calcium-based defluorination material for eggshell and a preparation method and application thereof, and steps are as follows: adding a phosphorus source into an eggshell calcium source, then adding an ethanol / water mixed solvent, stirring to form a uniform reaction system; adjusting the pH of the reaction system to be alkaline; performing a solvent-thermal reaction under a closed condition; and separating, washing, drying and grinding the product after the reaction through an 80-mesh screen to obtain the material. The application constructs a reaction environment in an ethanol / water mixed solvent system, performs a solvent-thermal treatment under an alkaline condition, converts the eggshell calcium source in-situ, and forms a calcium-phosphorus composite structure. The synergistic effect of ethanol regulates the polarity and ion diffusion behavior of the reaction system, and improves the structural uniformity and pore characteristics of the material. The obtained material can be used for water treatment and defluorination after washing, drying and grinding treatment. The process is simple, the structure is controllable, the defluorination rate of the obtained material can reach 98.31%, and the material is not sensitive to the interference of common coexisting anions.

The present application relates to the technical field of batteries, and in particular to a conductive binder, a solid-state battery cell, and a preparation method therefor and a use thereof. The solid-state battery cell comprises a positive electrode and a negative electrode, and a solid-state electrolyte layer arranged between the positive electrode and the negative electrode. The negative electrode contains the conductive binder. The conductive binder comprises a polymer having flexible segments and rigid segments, and a conductive carbon material and metal nanoparticles that are combined with the polymer. The conductive binder added to the negative electrode of the solid-state battery cell in the present application forms a three-dimensional conductive network structure by means of the polymer and the conductive carbon material and metal nanoparticles that are combined into the polymer. Therefore, the conductive binder can form a three-dimensional continuous conductive network structure on surfaces of negative electrode materials such as a silicon-based material, not only promoting uniform transport of ions and electrons and increasing the electronic conductivity and ionic diffusion coefficient, but also effectively mitigating volume change of the negative electrode materials during charging and discharging.

The application relates to a preparation method and application of a high-power-density all-solid-state supercapacitor negative material, and the method is characterized in that Ti3AlC2 and double fluorine salt are used as raw materials to in-situ synthesize multi-layer Ti3C2(OH) with hexagonal holes through high pressure x F y Then, carbon quantum dots are used as microwave sensitizing agents to prepare few-layer / single-layer products through a microwave-assisted chemical exfoliation method; the products are assembled into all-solid-state supercapacitors together with ZnMn2O4 positive electrodes and Zn3(PO4)2 solid-state electrolytes. Through the double innovation of double fluorine salt high-pressure in-situ pore forming and carbon quantum dot microwave sensitization exfoliation, the ion diffusion rate of the material is increased to 3-5 times that of traditional Ti3C2, and the electronic transmission efficiency is increased to 4-6 times, the prepared capacitor has a power density of greater than or equal to 6000 W / kg, can support a rescue unmanned aerial vehicle to realize a maximum load of 40-50 kg, 3-5 seconds from 0 to 120 km / h acceleration, and solve the problems of load limitation and lagging of mobile response caused by traditional materials.

A biomass-based carbon / nickel-cobalt-aluminum composite electrode based on cation vacancies is prepared and its application in flexible devices. The method is characterized by: using biomass as the carbon source, preparing hierarchical porous biomass-based carbon through phosphoric acid activation as a carrier, then growing a NiCoAl-LHs ternary layered structure in situ on the carbon carrier surface via solvothermal deposition, and finally achieving Al through alkaline etching. 3+ Selective dissolution was employed to construct a cation-vacancy-rich composite electrode material exhibiting both ultra-high specific capacitance and stability. Biomass char provided a conductive framework, constructed a hierarchical porous structure, and effectively suppressed LDH sheet aggregation; metallic Al... 3+ The introduction of [a specific technology / method] can enhance the structural stability of LDH; by utilizing the synergistic effect of carbon support and cation vacancies, the interlayer spacing of LDH can be increased, improving its resistance to OH [a specific substance / effect]. ‑ Increase adsorption capacity and accelerate the absorption of OH- in electrolytes ‑ The ion diffusion rate was high. The supercapacitor assembled using a constructed cation-vacancy-rich biomass-based carbon / nickel-cobalt-aluminum composite material as electrodes exhibited excellent specific capacitance, high energy density, and cycling stability. Furthermore, the fabricated device possesses excellent flexibility and sensitivity, showing broad application prospects in the sensor field.

The application discloses an rGO / Sn / Cu2O composite material and a preparation method and application thereof, wherein compared with Cu2O and Sn / Cu2O composite materials, the rGO / Sn / Cu2O composite material has improved first discharge specific capacity. This is mainly attributed to the synergistic effect of the rGO three-dimensional conductive network on the structure, so that the composite material has fast electron transmission on the electrode surface and fast ion diffusion in the electrode, thereby causing the electrode performance of the composite material to be significantly improved. In addition, the flexible graphene three-dimensional network further relieves the volume change caused by the expansion and shrinkage of nano Sn particles, promotes the stability of the structure; the added rGO buffer layer effectively adjusts the internal strain generated by the great expansion between Sn nano particles in the electrochemical process, and further improves the conductivity of Cu2O, thereby maintaining the structural integrity of the cycle electrode, and further improving the cycle stability of the Cu2O nano material.

The application provides an ultra-sulphate concrete capable of curing chlorides in situ and a preparation method thereof, raw materials of the ultra-sulphate concrete include, in terms of weight fractions, granulated blast furnace slag 70-75 parts, desulfurization gypsum 15-18 parts, activated shell powder 8-12 parts, curing agent 1.5-3.0 parts, sodium aluminate 0.4-1.0 parts, nano-silicon dioxide 0.3-0.8 parts, graphene 0.01-0.05 parts, sea sand 120-150 parts, gravel 280-320 parts, water 40-45 parts and water reducing agent 0.3-0.6 parts; wherein, the sea sand is not subjected to desalination treatment; the application constructs a sodium aluminate-graphene-nano-silicon dioxide-activated shell powder-curing agent multi-site synergistic curing system, the curing rate of chlorides in the sea sand is more than 96%, and the diffusion of chlorides can be effectively inhibited, and the mechanical properties and use stability of the ultra-sulphate concrete are improved.

Preparation of hydrogen vacancy-rich biomass-based carbon / nickel-cobalt composite electrode and flexible sensing application thereof, characterized by using biomass as a carbon source, growing NiCo-LDH on the surface thereof in situ through a solvothermal deposition method, further combining with electrochemical activation treatment to cause irreversible deprotonation of cobalt hydroxyl in the layered double hydroxide, accurately introduce hydrogen vacancies, and form Co-O-H with strong adsorption to cations v Active centers, and constructed hydrogen vacancy-rich composite electrode materials with high specific capacitance and cycle stability. Biomass carbon carrier as a conductive and structural support skeleton effectively inhibited the aggregation of LDH nanosheets. Using the synergistic effect of carbon carrier and hydrogen vacancy, the rapid reversible intercalation and deintercalation of multivalent cations and charge compensation were promoted, which significantly improved the ion diffusion kinetics and redox reaction stability. Based on the above structural characteristics, the composite electrode prepared by the application exhibits excellent ion storage performance in various neutral electrolytes, and can further construct flexible sensing and energy storage integrated devices for real-time signal monitoring of human joint movement.

A coated pane includes a substrate and an electrically conductive layer stack on a surface of the substrate, which, starting from the substrate, includes a dielectric barrier layer preventing ion diffusion with a refractive index of at least 1.9 and a layer thickness of 5 nm to 18 nm, a dielectric anti-reflective layer with a refractive index of at most 1.6, an electrically conductive layer with a layer thickness of 75 nm to 120 nm, a dielectric blocking layer for controlling oxygen diffusion with a refractive index of at least 1.9 and a layer thickness of 10 to 25 nm, and a dielectric optical layer with a refractive index of at most 1.6.

This application provides a two-dimensional VOPO4 material with adjustable interlayer spacing, its preparation method, and its applications. Addressing the problems of insufficient reversible capacity, poor rate performance, and structural degradation during cycling of existing two-dimensional layered VOPO4 materials as anodes in potassium-ion batteries, this application provides a solution for intercalation modification of VOPO4 materials. Specifically, the two-dimensional VOPO4 material is a two-dimensional VOPO4 nanosheet modified by intercalation with aniline derivatives. The aniline derivatives are intercalated into the interlayer spaces of VOPO4, resulting in an interlayer spacing of 15.8 Å–20.9 Å. By pre-inserting aniline derivatives of specific molecular sizes into the interlayer spaces of VOPO4, expanded two-dimensional VOPO4 nanosheets with adjustable interlayer spacing are formed. The expanded interlayer space provides more spacious channels and more active sites for potassium ion transport, thereby improving ion diffusion kinetics and structural stability.

This application provides a method and system for synchronously monitoring pH and potential during the synthesis of magnetic iron oxide, relating to the field of electrochemical monitoring technology. The method includes: acquiring voltage signals output from a pH electrode and an indicator electrode and preprocessing them to form a synchronous time-series data stream; then, after signal conditioning, inputting the signal into a time-frequency transformation module for wavelet packet decomposition to extract characteristic frequency band components corresponding to ion diffusion and electron transfer, and reconstructing pH and potential characteristic curves; further, inputting the two characteristic curves into a dynamic coupling analysis unit to calculate the instantaneous phase difference and amplitude correlation coefficient, and constructing a Lissajous figure accordingly; finally, comparing the Lissajous figure with a standard elliptical trajectory, and obtaining the monitoring results of pH and potential deviations when the figure deviates from the trajectory. This application achieves accurate synchronous monitoring of pH and potential under strong coupling conditions.

The utility model relates to a kind of electrode structure of supercapacitor, to solve the problem of insufficient electrode and electrolyte interface contact, big resistance. The structure includes electrode main body, its one side is sequentially provided with porous layer, intermediate layer and electrolyte reservoir. The porosity of porous layer is not less than 50%, aperture range is 1-100nm, can significantly increase the actual contact area of electrode and electrolyte, reduce interface resistance. Intermediate layer is conductive polymer layer, can relieve interface stress, improve interface stability, while optimizing electrode surface characteristics, so that electrolyte is more easily spread and soak. The cavity volume of electrolyte reservoir accounts for 30%-40% of total volume, ensure sufficient supply of electrolyte. The device improves ion transport efficiency, reduces ion diffusion resistance, enhances electrode mechanical strength, prolongs the service life of supercapacitor, improves electrochemical performance through the synergistic effect of porous layer, intermediate layer and electrolyte reservoir.

A flexible structure for negative ion heating, relating to the field of negative ion heating structure technology, includes a flexible heating mesh, a flexible perforated support layer, and a negative ion generating layer arranged sequentially, as well as a negative ion generating device. The flexible heating mesh is generally mesh-like. The flexible perforated support layer is disposed between the flexible heating mesh and the negative ion generating layer and has several perforations. The negative ion generating device includes several negative ion emitters mounted on the negative ion generating layer. The released negative ions pass through the perforations of the flexible perforated support layer and then diffuse outward through the mesh of the flexible heating mesh. This invention achieves the dual effects of heating and negative ion release. The perforations of the flexible perforated support layer and the mesh of the flexible heating mesh form a continuous negative ion diffusion channel, providing a complete negative ion diffusion path. The flexible structure can conform to the curvature of the human body and can be widely used in cushions, mattresses, chair backs, and physiotherapy protective gear.

A bimetallic MAX phase and its joule heat preparation method and application in supercapacitors belong to the technical field of MAX phase preparation. By accurately controlling the heating power and action time, the synthesis of bimetallic MAX phase is completed in a very short time, ensuring that the product has a highly uniform layered structure and conductivity. The synergistic effect of bimetallic elements enhances the material's electron transport capacity. After synthesis, the material is treated by chemical etching to selectively remove some metal atoms, creating a rich porous network structure on the surface, increasing the specific surface area and the number of active sites. The porous structure provides efficient ion diffusion paths and charge storage interfaces for supercapacitor electrodes, improving the energy storage density, power output, and long-term cycle stability of the capacitor, and reducing the internal resistance, making it suitable for high-frequency charging and discharging scenarios. This method not only simplifies the preparation process and improves the yield, but also provides a reliable material basis for the development of high-performance energy storage devices.

This application relates to a positive electrode active material and its preparation method, and a battery, belonging to the field of battery technology; the positive electrode active material has a core-shell structure, the core of the core-shell structure includes a lithium-rich manganese-based active material, and the shell layer of the core-shell structure includes Li2SO4, Li2SeO4, and Li2Se. x S 1‑x At least two of the following O4, wherein 0 < x < 1, are obtained by coating Li2SO4, Li2SeO4 and Li2Se with a lithium-rich manganese-based active material. x S 1‑x At least two of the shells formed in O4, utilizing Li2SO4, Li2SeO4, and Li2Se x S 1‑x O4 and other materials have high ionic conductivity, which can effectively promote the transport of lithium ions at the interface of lithium-rich manganese-based active materials, giving the positive electrode active material a high ion diffusion coefficient.

Disclosed herein are embodiments of a glass composition including SiO2 in an amount in a range from 53 mol % to 84 mol %, Al2O3 in an amount in a range from 0.3 mol % to 20 mol %, Na2O in an amount in a range from 3 mol % to 16 mol %, and at least one of Cs2O or Rb2O in an amount in a range from 0.05 mol % to 8 mol %. The glass composition has a first silver ion diffusivity at 110° C. of 5×10−19 m2 / s or less, and the glass composition has a second silver ion diffusivity at 350° C. of at least 5×10−17 m2 / s at 350° C. The glass composition is particularly suitable for use as a glass substrate of a photonic chip package.

This invention provides a porous iridium-based titanium anode with high bonding strength for electrochemical descaling and its preparation method, relating to the field of electrochemical electrode material preparation technology. The aforementioned porous iridium-based titanium anode is constructed by sequentially preparing a TiO2-SnO2 composite layer, a SnO2-IrO2 composite transition layer, and an IrO2 glaze layer on the surface of a titanium substrate, and then constructing a porous iridium electrodeposition layer using a PS microsphere template method. The PS microsphere template method creates a highly ordered porous array, significantly improving the effective reaction area and ion diffusion efficiency of the electrode, directly translating into an excellent descaling rate. Furthermore, strong chemical bonds are formed between the various layers, endowing the anode with excellent stability. By controlling the electrolyte composition for preparing the iridium electrodeposition layer, uniform deposition of IrO2 within the pores can be ensured, giving the anode excellent electrochemical descaling performance.

A semiconductor structure and a forming method thereof, the forming method comprising: providing a substrate, including a substrate and a first fin material layer on the substrate, the substrate including a first device region and a second device region adjacent to the first device region, and a first punch-through ion prevention layer is further formed between the substrate and the first fin material layer in the first device region; removing the first fin material layer in the second device region to expose a sidewall of the first punch-through ion prevention layer; forming an ion blocking layer on the exposed sidewall of the first punch-through ion prevention layer; after forming the ion blocking layer, forming a second punch-through ion prevention layer on the substrate in the second device region; forming a second fin material layer on the second punch-through ion prevention layer; and performing a fin patterning process to pattern the first fin material layer into a first device fin and to pattern the second fin material layer into a second device fin. Forming the ion blocking layer is conducive to blocking ion diffusion between the first punch-through ion prevention layer and the second punch-through ion prevention layer.

The application relates to a nitrogen-doped multi-level microporous carbon material and a preparation method thereof, and belongs to the technical field of carbon materials. A conjugated microporous polymer of an alkyne porphyrin is obtained by coupling reaction of a halogenated aromatic hydrocarbon containing bromine and an alkyne benzene compound under the joint action of copper and palladium catalysts. By pyrolysis at different temperatures, some functional groups in the polymer are cracked and escape in the form of gas, which continuously forms pores in the carbon skeleton and gradually changes into a nitrogen-doped multi-level microporous carbon material. The nitrogen-doped sites in the structure of the multi-level microporous carbon material generate defect sites and provide a large number of active sites; meanwhile, the multi-level microporous structure forms a three-dimensional through structure between pores, effectively shortening the ion diffusion path; pyrolysis can change the polymer skeleton into a short-range ordered structure, providing an interlayer embedding channel for ions; and the energy storage mechanism of the material is defect adsorption, interlayer embedding and micropore filling respectively.

This invention relates to the field of zinc-ion battery technology, specifically to an electrolyte and a zinc-ion battery containing the electrolyte. The electrolyte provided by this invention comprises a zinc salt, water, and an additive composition. The additive composition comprises a calcium salt and an amine compound containing three or more hydroxyl groups. The calcium salt provides Ca... 2+ The calcium salt has a strong attraction to electronegative oxygen atoms in H₂O, which can lock in free water molecules in the bulk electrolyte, thereby forming a large solvation sheath, breaking the original hydrogen bond network between water molecules, and thus lowering the freezing point of the electrolyte. However, the calcium salt only acts on the bulk electrolyte and cannot alleviate the capacity loss caused by the slow ion diffusion kinetics at the positive electrode interface. More importantly, during cycling, calcium ions may embed between the MnO₂ material layers, blocking proton transport channels, leading to structural collapse and capacity decay.

This invention discloses a fast-charging graphite anode material, its preparation method, and its application. The steps are as follows: Step 1, pulverizing a graphite precursor to obtain fine powder; Step 2, mixing the fine powder with a pore-forming agent, heating and reacting under an inert atmosphere, and then washing and drying to obtain a porous graphite precursor; Step 3, mixing the porous graphite precursor with a liquid granulating agent and a catalyst uniformly, solidifying and granulating under heating conditions, and then oriented under a vertical magnetic field to obtain porous secondary graphite particles; Step 4, sequentially carbonizing the porous secondary graphite particles at low and high temperatures under gas protection to obtain a fast-charging graphite anode material with a core-shell structure; its core is porous secondary graphite particles, and the shell is an amorphous carbon coating layer. By combining the synergistic process of "magnetic field oriented granulation, hierarchical pore formation, and core-shell structure regulation," the prepared fast-charging graphite anode material can simultaneously achieve high compaction density, high ion diffusion rate, and long cycle life.