37results about How to "Fast aggregation" patented technology

The invention relates to the technical field of solid-state batteries, in particular to a solid-state electrolyte composite membrane, a preparation method thereof and a solid-state battery. The preparation method comprises the following steps: performing ultrasonic-initiated cross-linking polymerization on a polymer solid electrolyte monomer, a cross-linking agent and a surface hydroxylated oxide solid electrolyte to obtain a polymer-oxide solid electrolyte matrix, washing the polymer-oxide solid electrolyte matrix, and soaking the polymer-oxide solid electrolyte matrix in an electrolyte to obtain the solid electrolyte composite membrane. According to the invention, crosslinking of the polymer electrolyte monomer is initiated by ultrasound, and chemical bonds are formed between part of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte, so that the interfacial compatibility of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte is effectively improved, and the ionic conductivity, chemical stability and mechanical strength of the polymer electrolyte are improved; due to the properties of easy processing, good flexibility and the like of the polymer electrolyte, the interface compatibility between the oxide solid electrolyte and the positive and negative pole pieces can be fully improved, the flexibility and the processability are improved, and a win-win effect is achieved.

The invention discloses a method for preparing synthetic quartz sand by a sol-gel method, which comprises the following steps: mixing silicon alkoxide and an alcohol solvent, and stirring to form a homogeneous solution marked as L1; mixing an acidic catalyst, an alcohol solvent and ultrapure water to form a mixed solution, and recording the mixed solution as L2; dropwise adding the L1 solution into the L2 solution, and continuously stirring and hydrolyzing to obtain sol; dropwise adding ammonia water into the sol until the pH value is 5-10, and standing in a vacuum drying oven to obtain wet gel; and drying and sintering the wet gel to obtain the high-purity synthetic quartz sand. The gelation time is accurately controlled through acid-base two-step catalysis, the production period is shortened, and the production efficiency is improved; meanwhile, the size and uniformity of silicon dioxide particles are controlled by controlling the dripping speed of a silicon source, so that the sintering temperature of the synthesized quartz sand is greatly reduced, and the solvent is recycled through distillation when wet gel is dried, so that the production cost is reduced, and the pollution to the environment is reduced.

The invention discloses selenium-containing unsaturated polyesteramide and a preparation method thereof, and the preparation method comprises the following steps: mixing and dissolving a diamine compound, propiolic acid ester and selenolactone in an organic solvent, and carrying out chemical reaction to obtain the selenium-containing unsaturated polyesteramide. A diamine compound, propiolic acid ester and selenolactone are used as raw materials, selenium-containing unsaturated polyesteramide is generated through click polymerization reaction of selenol and alkyne, the novel preparation method of selenium-containing unsaturated polyesteramide is developed, and the prepared polyesteramide is narrow in molecular weight distribution, controllable in structure and adjustable in degradation rate, and can be used for preparing selenium-containing unsaturated polyesteramide. Long-term stability is good, multiple responsiveness is achieved, and optical performance is good; the raw materials are wide in source, tedious substrate synthesis is avoided, the steps are simple, the reaction conditions are mild, the polymerization speed is high, and efficient large-scale production can be achieved; no catalyst is needed, no by-product is generated, and extra purification is not needed.

The invention relates to the technical field of coating preparation, and provides a polyurethane conformal coating preparation method which comprises the following steps: S1, inputting requirements of a conformal coating product and used environmental conditions into a weighing module by an operator, and triggering the weighing module to automatically adjust the ratio of raw materials; s2, sequentially adding the weighed polyurethane resin, curing agent, diluent and assistant into a mixing module, mixing to form a mixed raw material, and collecting state data in the mixing process; s3, obtaining the state data through an evaluation module, and carrying out the evaluation to form an evaluation result; s4, if the mixing qualified threshold value is met, heating the mixed raw material through a heating module; s5, transferring the heated mixed raw material into a reaction kettle to form a reaction raw material; s6, rapidly cooling the reaction raw materials to room temperature, and removing impurities to obtain a conformal coating mother solution; and S7, adding the pretreated nano filler into the mother liquor of the conformal coating, and adding a multi-interface reinforcing agent to form a conformal coating product.

The invention provides a general semiconductor test data full life cycle management system, and the system comprises a test source data access module which is used for uploading a source test file in a test machine to the system; the full test data analysis and standard model conversion module is used for converting the uploaded source test file into a test file in a standard data format and transmitting the test file to the multi-dimensional KPI atomic model operation and persistent storage module; the multi-dimensional KPI atomic model operation and persistence storage module is used for calculating a multi-dimensional KPI atomic result according to the data in the test file in the standard data format and storing the multi-dimensional KPI atomic result to a persistence layer database; and the unified service output module is used for receiving a user query request, performing aggregation calculation on the multi-dimensional KPI atomic result in the persistent layer database according to the user query request, and returning a KPI result meeting the user query request. The system can improve the utilization efficiency of semiconductor test data and reduce the operation cost.

The invention relates to the field of photocatalysis and high polymer material preparation, and discloses preparation of a heterogeneous photocatalyst and application of the heterogeneous photocatalyst in controllable free radical polymerization, and the preparation method comprises the following steps: step 1, the adopted photocatalyst has the following structure: a conjugated structure unit containing an electron-donating group and an electron-withdrawing group is connected; according to the efficient cross-linking conjugated catalyst, rapid and controllable free radical polymerization is achieved under the condition of low catalyst dosage, high production efficiency and low production cost are achieved, a deoxygenization device and deoxygenization operation can be omitted through the light-induced controllable free radical polymerization method, polymerization reaction can be accelerated in the presence of oxygen, and the polymerization efficiency is improved. According to the present invention, the heterogeneous photocatalyst is adopted as the catalyst, good polymerization controllability is maintained, the catalyst can be further recycled, the pollution problem of the traditional photocatalyst to the product is avoided, and the light-induced controllable free radical polymerization using the heterogeneous photocatalyst comprises atom transfer free radical polymerization (ATRP) and reversible addition-fragmentation chain transfer (RAFT) polymerization.

The invention discloses a metal organic framework material for quickly detecting acetylene and a preparation method thereof, and an application of the metal organic framework material for detecting dissolved acetylene in transformer oil. The metal organic framework material is composed of a dicarboxylic acid ligand with a flexible thiomethyl group and a metal ion of group IB to form a metal organic framework, and then the soft functional group thiomethyl of the side chain stably adsorbs the metal ions of group VIII to fix them in the metal organic framework, and can quickly adsorb and catalyze acetylene to polymerize acetylene. The polymerized acetylene causes the metal organic framework to undergo a visual color change, so that the metal organic framework can be used as a colorimetric sensor to realize rapid detection of acetylene. Through solvent thermal reaction and soaking reaction, the preparation process does not require harsh reaction conditions and complex processes, and the method is simple. The dissolved acetylene in the transformer oil can be conveniently and quickly detected by colorimetry; the detection limit reaches 4.1ppm, overcoming the problems of the traditional transformer detection process being cumbersome, time-consuming, and costly, and can realize real-time monitoring.

The present invention provides a compound, a liquid crystal composition and a liquid crystal display element. The problem to be solved by the present invention is to provide a liquid crystal display element capable of achieving high-speed responsiveness and high voltage holding ratio (VHR), and to provide a liquid crystal composition containing a polymerizable compound capable of simultaneously achieving fast polymerization speed, appropriate tilt formation, high tilt stability, and high voltage holding ratio (VHR), and a PSA-type or PSVA-type liquid crystal display element in which screen burn-in (IS) is fully suppressed or does not occur, and a compound suitable for modulating the above-mentioned liquid crystal composition containing a polymerizable compound. The method for solving the problem is that the present invention provides a compound having a structure represented by formula (K‑1) in the molecule, and provides a liquid crystal composition containing the compound and an element using the liquid crystal composition. [Chemistry 1]

The present application relates to the technical field of artificial intelligence and federated machine learning, and particularly relates to an asynchronous federated learning aggregation method and system based on clustering cache. The present application clusters clients by intermediate features of the clients. In global aggregation, intra-cluster aggregation is firstly performed, and then global aggregation is performed based on client clusters. The client clusters are dynamically updated. In intra-cluster aggregation, an active set and a slow set are introduced to realize an asynchronous participation mechanism of intra-cluster aggregation. Weighted aggregation of the active set and the slow set solves the problem of system heterogeneity. The present application solves the defect of insufficient timeliness of existing federated learning methods in a data heterogeneous scene, and guarantees the timeliness and model training accuracy of federated learning in the data heterogeneous scene.

The invention discloses an unmanned ship autonomous cluster formation obstacle avoidance navigation method. The method mainly comprises the following steps: initializing parameters, position, course and operation plan of each ship in an unmanned ship cluster; in the sailing process, the pilot boat and the following boat share sailing information to the cluster network; in the sailing process, sea area environment information is detected according to a sensing module of the unmanned ship, and whether an obstacle is encountered or not is judged; when an obstacle is encountered, the unmanned ship formation carries out control behavior conversion, and corresponding obstacle avoidance measures are taken. According to the method, through obstacle avoidance path planning of a pilot boat, local collision avoidance of following boats based on a dynamic window, and ranking according to formation parameters during obstacle avoidance of the whole formation, when an unmanned boat cluster encounters an obstacle, respective optimal control behaviors can be flexibly adopted for collision avoidance on the basis of guaranteeing safety and accessibility, and the unmanned boat cluster is more accurate in obstacle avoidance. And moreover, rapid aggregation can be realized after obstacle avoidance, cluster navigation can be continuously kept, and the obstacle avoidance efficiency is effectively improved.

This invention discloses a soybean bidirectional promoter, a recombinant vector, its construction method, and its applications, belonging to the field of plant genetic engineering technology. The soybean bidirectional promoter of this invention can simultaneously drive gene expression in two directions. By tandemly connecting three genes at the front and back ends of this bidirectional promoter, it is possible to achieve simultaneous expression of six genes driven by a single promoter. Furthermore, by utilizing this bidirectional promoter in combination with the ZQ6 enhancement sequence and the 35S:MdMYB10 expression cassette, a method for simultaneously and significantly enhancing the expression levels of more than six genes was developed, and based on this, a method for enabling plants to emit noticeable self-luminescence under dark conditions was developed. The method for efficient and coordinated multi-gene transformation mediated by the soybean bidirectional promoter provided by this invention can be applied to constructing a soybean multi-gene coordinated transformation system, achieving rapid aggregation of superior traits, and cultivating new soybean germplasm with excellent traits.

The invention relates to the technical field of biology, and discloses a construction method and application of a corn high-frequency haploid induction line breeding population, and the construction method comprises the following steps: selecting a plurality or more haploid induction lines with higher inductivity as population construction parents, and carrying out diverse hybridization and mixed harvesting on seeds to obtain a line selection initial population; carrying out two rounds of genetic equilibrium, sowing and selecting single plants with high inductivity, carrying out half-sib selection on the mixed pollen of the whole population, sowing and selecting single plants with high inductivity, carrying out half-sib selection on the mixed pollen of the selected single plants, and carrying out equivalent mixing on the screened excellent single plants to obtain an improved population. According to the method, a conventional method for breeding a second-loop line through an induction line is broken, haploid induction line breeding is combined with population improvement and half-sib selection, and multi-gene rapid polymerization of haploid control induction characters is achieved; a haploid breeding technology is utilized for feeding back for haploid induction line breeding, and haploid induction characters are rapidly fixed in a mode of creating an induction line DH line, so that the corn high-frequency haploid induction line is bred.

The present invention relates to a liquid-crystalline (LC) medium comprising polymerisable compounds containing a thioalkyl group for optical, electro-optical and electronic purposes, in particular for use in LC displays, especially in PSA (polymer sustained alignment) or SA (self-alignment) type LC displays, to a PSA or SA mode LC display comprising the LC medium and to a process for the production of the LC display.

The invention discloses a method and application of an underwater front polymerization method for rapidly preparing epoxy composite materials, the method being as follows: (1) ultrasonically dispersing BADGE, EOM, CE, and IOC-8SbF6 to obtain component A; (2) ultrasonically dispersing BADGE, EOM, CE, TPED, and CuCl2.H2O to obtain component B; step (3) uniformly mixing the A / B components, adding carbon fiber, fumed silica, cement, and quartz sand, and mechanically stirring until uniform, to obtain an epoxy premixed slurry; (4) injecting the epoxy premixed slurry into the interface of the underwater bonded material or into a mold using a syringe; (5) exciting at one end of the epoxy premixed slurry, irradiating with a UV lamp, until polymerization begins. The entire polymerization process of the present invention is completed within a few minutes, providing a new idea for underwater in-situ ultra-fast synthesis of high-strength epoxy-based composite materials and underwater in-situ bonding.

The invention provides a polystyrene-maleic anhydride-lactide copolymer, the polystyrene-maleic anhydride-lactide copolymer has a structure shown in the following formula, R1 and R2 are respectively and independently selected from C1-C10 substituted or unsubstituted alkyl groups and C6-C30 substituted or unsubstituted alicyclic groups or aryl groups, x and y are respectively integers in a range of 5 to 50, n is an integer in a range of 10 to 120, and p is an integer in a range of 20 to 260. The preparation method comprises the following steps: firstly, carrying out copolymerization on styrene and maleic anhydride to prepare low-molecular-weight SMA, carrying out polycondensation on lactic acid or lactic acid oligomer to synthesize low-molecular-weight polylactic acid, carrying out terminal hydroxylation modification on the low-molecular-weight polylactic acid, and finally, carrying out high-temperature polymerization on the terminal hydroxylation low-molecular-weight polylactic acid and SMA under the action of a chain extender to prepare the copolymer. The copolymer has rigidity and strength of a polylactic acid chain segment and flexibility and toughness of an SMA chain segment at the same time, mechanical performance, heat resistance and processability are excellent, and the industrial application field is widened. # imgabs0 #

A method for producing a fluorine-containing polymer in which a monomer containing vinylidene fluoride is polymerized in a polymerization medium of a polymerization solvent (A) containing at least one type of compound selected from the group consisting of compounds represented by formula (1) and formula (2). The description in formulae (1)-(2) is omitted. # imgabs0 #

A text detection method comprises the following specific steps that S1, a text detection model is established, the text detection model comprises a backbone network, an FPN network and three output branches, and the three output branches are a complete segmentation mask branch, a reduced version segmentation mask branch and an offset detection branch; s2, obtaining an original label, decomposing the original label to generate label data of three branches, and inputting the label data into the text detection model for training and supervision; s3, inputting a character image, and after the character image passes through the trained text detection model, respectively outputting a complete semantic segmentation mask, a reduced semantic segmentation mask and an offset graph by three branches; calculating the'post-offset coordinates' of each pixel in the complete semantic segmentation mask by combining the complete semantic segmentation mask and the offset graph; then, the reduced version semantic segmentation mask is utilized to determine which reduced version instance area the'offset coordinate 'of each pixel in the complete semantic segmentation mask falls in, and each pixel of the complete semantic segmentation mask belongs to the corresponding text instance.

The invention discloses a pyridine-phenol compound, polyester prepared from the pyridine-phenol compound as well as a preparation method and application of the pyridine-phenol compound. The pyridine-phenol compound has a structure as shown in a formula (I), wherein in the formula (I), R1 is selected from amino, dimethylamino or pyrrolidinyl; r2 is selected from nitro, fluorine or trifluoromethyl; r3 is selected from hydrogen, methoxyl, methyl, isopropyl, tert-butyl or fluorine; and R4 is selected from hydrogen, methoxyl, methyl, ethyl, isopropyl, tert-butyl or fluorine. The pyridine-phenol compound is an efficient organic catalyst and can catalyze ring-opening polymerization of a cyclic monomer to prepare aliphatic polyester, the conversion rate of the cyclic monomer is high, and the dispersion coefficient (PDI) of the synthesized polyester is low. The catalyst is insensitive to the environment (stable to air and water), does not contain metal, and is mild in reaction condition, high in reaction selectivity and high in polymerization speed. # imgabs0 #

The invention belongs to the field of cassava molecular markers, and particularly relates to a cassava KASP marker and application of the cassava KASP marker in cassava variety distinguishing. The 27 KASP markers provided by the invention have good distinguishing ability in cassava genetic analysis, and can effectively reveal genetic differences among different materials. The DNA fingerprint spectrum of 184 parts of cassava materials is constructed based on 27 core KASP markers, and the purpose of rapid variety identification can be achieved. The KASP marker disclosed by the invention can be used for effectively identifying false selfing offspring. In conclusion, the KASP marker provided by the invention provides a new method and thought for genetic improvement and variety identification of cassava, provides a powerful tool for subsequent cassava breeding and genetic improvement research, and is beneficial to breeding of new varieties with excellent characters.

The invention belongs to the field of color contact lenses, and particularly relates to contact lens ink resin as well as a preparation method and application thereof. The method comprises the following steps: 1) preparing a mixture of a monomer, a solvent and a photoinitiator, 2) curing the monomer mixture with ultraviolet light, 3) controlling viscosity accumulation, and 4) activating with an adhesion promoter and the photoinitiator. And the filler does not contain a cross-linking agent or a chain transfer agent. The prepared resin can be used as a base film layer coating and a pigment layer coating. The resin is suitable for transfer printing and UV curing, and cannot be contaminated by pigments.

The invention discloses a protection method for a touch circuit, which comprises the following steps of: coating a layer of protection film on the surface of the touch circuit of a protection panel, and adding an electrical isolation layer between the protection film and the touch circuit, wherein the special insulating film is prepared in the modes of polymerization, film casting, drying and cutting, the preparation raw material is polyimide, the special insulating film is in a liquid state and is poured on the flat protective panel to form a solution with a certain concentration, the solution is uniformly spread by a roller of a film casting machine or a smooth workbench to form a thin film, and the thin film is placed on the protective panel. Along with volatilization of the solvent, the solution is gradually cured to form a film which passes through a uniform thin film, then drying treatment is carried out to remove the solvent, and finally the film is cut into the required size. According to the protection method for the touch circuit, the surface of the touch circuit is coated with the protection film and the electrical isolation layer, physical damage such as scraping and impacting can be effectively prevented, and therefore the durability of the touch circuit is improved.

A method for producing a fluorine-containing copolymer in which a monomer containing tetrafluoroethylene is polymerized in a polymerization medium containing at least one polymerization solvent (A) selected from the group consisting of compounds represented by formulae (1) to (3). The description in formulae (1)-(3) is omitted. # imgabs0 # CH3-Z2 (3)

This invention relates to the interdisciplinary field of financial technology and systems engineering, specifically to a controllable financial fusion system and method. A capital plasma generation module transforms dispersed, low-activity financial capital into highly liquid, highly responsive capital plasma; a magnetic field confinement and focusing system constrains and focuses capital flow paths; a critical point detection and ignition trigger module accurately determines whether capital aggregation has reached the fusion critical point and initiates the capital release procedure; a control rod adjustment and negative feedback system dynamically adjusts the intensity of capital release in real time; an energy conversion and output channel converts the capital energy released by fusion into actual economic output; and a safety shell and emergency shutdown system immediately halts capital release in the event of system failure, effectively isolating risks and ensuring stable system operation. This invention achieves efficient capital aggregation and precise control by mapping a nuclear fusion physics model, reducing risk and improving accuracy, constructing a closed-loop financing risk control system, adapting to major projects, and supporting multi-system operation.

The present invention relates to the field of robot visual perception technology, specifically a three-dimensional scene reconstruction method based on cross-channel attention mechanism feature fusion, including: S1, collecting multiple binocular stereo vision images to be three-dimensionally reconstructed after distortion correction and stereo correction, and constructing a training set; S2, constructing a three-dimensional scene reconstruction network; S3, selecting a binocular stereo vision image to input into the three-dimensional scene reconstruction network, and obtaining the predicted disparity of each different stage; S4, constructing a loss function, calculating the loss between the predicted disparity and the real disparity of each different stage, and looping from S3 to S4 until the loss function converges; then updating the weight of the three-dimensional scene reconstruction network; S5, testing the trained three-dimensional scene reconstruction network, and obtaining the three-dimensional depth information of the binocular stereo vision three-dimensional reconstruction scene. The present invention greatly improves the efficiency of context feature fusion and improves the binocular stereo vision disparity estimation performance.

The utility model relates to extrusion granulation technical field especially relates to a kind of nanometer material compression granulation equipment, including base, the upper surface of base is fixedly installed with stand, the top of stand is fixedly installed with compression box, and the top of compression box is fixedly installed with material hopper, rotation is installed in the compression box with shaft, and the outer wall of shaft is fixedly installed with the stirring rod of equidistance annular distribution, first auger rod is also rotationally installed in the compression box, and first auger rod is located below the shaft, the outer wall of one side of compression box is fixedly installed with auger cylinder, and the end of first auger rod is located in auger cylinder. The utility model has obvious advantages, spraying and stirring synergistic accelerate material polymerization;First auger rod realizes preliminary extrusion plastic forming, densification;Second auger rod completes secondary extrusion with extrusion cylinder, accurately controls granule quality;Granulation mechanism can flexibly adjust granule size shape, high efficiency and stability, satisfy multi-field demand.

The invention discloses a preparation method of Janus water-based microgel, and belongs to the technical field of microgel. According to the preparation method, the Janus water-based microgel is successfully prepared by taking vortex oscillation emulsion formation as a basis and taking ultraviolet irradiation as a polymerization mode. The method comprises the following steps: 1, preparing a solution: weighing a polymeric monomer / a cross-linking agent / an initiator, and preparing an oil phase solution containing a Span 80 surfactant; preparing an ATPS aqueous solution; 2, preparation of liquid drops of the Janus emulsion; 3, preparation of the Janus water-based microgel; and 4, washing the Janus water-based microgel. The oil phase and the surfactant used in the invention are cheap and easily available, the preparation method is simple, and Janus water-based microgels with different morphologies can be obtained by changing the aqueous two-phase components and the types of the surfactant. The Janus water-based microgel prepared by the invention is expected to be used for drug encapsulation and treatment.

The utility model relates to the technical field of protein detection, and discloses a Fe3O4 (at) AuNPs magnetic molecular imprinting sensor detection system which comprises an electrochemical workstation, a magnetic electrochemical molecular imprinting sensor, a carrier, a container, a metal disc and an alternating electric field generation module, the magnetic electrochemical molecular imprinting sensor comprises a working electrode, a counter electrode and a reference electrode, the working electrode, the counter electrode and the reference electrode are all connected with the electrochemical workstation, the working electrode is partially inserted into the container, the metal disc is arranged at the bottom of the container, and the positive electrode of the alternating electric field generating module is connected with the working electrode. The negative electrode of the alternating electric field generation module is connected with the metal disc, the carrier is arranged at the bottom of the working electrode, the carrier is a Fe3O4 (at) AuNPs carrier, and the Fe3O4 (at) AuNPs carrier is obtained by combining a molecularly imprinted polymer of protein with Fe3O4 and then combining with AuNPs. According to the utility model, the detection speed, the detection range and the detection effect of protein are improved.

The invention discloses a preparation method of a PDACN-Si photocatalytic hydrogen production catalyst, and belongs to the field of photocatalysts. A template method and a microwave-assisted heating strategy are adopted, dicyandiamide is used as a carbon nitride synthesis precursor, SiO2 is used as a hard template, dicyandiamide and 2-aminothiophene-3-formonitrile are rapidly polymerized on the SiO2 template under microwave-assisted heating, then the SiO2 template is etched through NaOH, and the PDACN-Si photocatalyst with macropores of a honeycomb structure is successfully prepared. The prepared PDACN-Si catalyst shows excellent photocatalytic activity when applied to the reaction process of photocatalytic preparation of hydrogen.

The invention belongs to the technical field of photocuring films, and particularly relates to a flexible organic packaging composition with high leveling performance and a use method and application thereof. The flexible organic packaging composition is prepared from the following raw materials in parts by weight: 30 to 70 parts of bifunctional non-silicon acrylate monomer, 10 to 40 parts of bifunctional silicon-containing acrylate monomer, 5 to 20 parts of monofunctional silicon-containing acrylate monomer, 1 to 20 parts of monofunctional non-silicon acrylate, 1 to 10 parts of alicyclic / bridged ring monofunctional acrylate monomer and 0.1 to 5 parts of photoinitiator. The flexible organic packaging composition provided by the invention is high in polymerization speed and high in conversion rate, and particularly has relatively strong leveling performance and strong limit film forming ability on the premise of ensuring excellent packaging performance (water and oxygen barrier), so that the flexible organic packaging composition also has relatively strong ability of filling holes in rough surfaces, and can effectively avoid generation of micro holes and micro cavities.

The invention discloses an interface modification method for preparing a negative-electrode-free lithium metal battery by utilizing ultraviolet polymerization tannic acid composite Ag particles. The interface modification method is used for solving the problems that a negative electrode of a negative-electrode-free lithium metal battery in the prior art is poor in lithium affinity, relatively large in nucleation obstruction, non-uniform in lithium deposition, relatively poor in lithium stripping / plating reversibility and the like. The method comprises the specific steps that the Cu foil is placed in hydrochloric acid to be shaken and oscillated, and then deionized water and ethyl alcohol are used for repeatedly cleaning the Cu foil for three times; and preparing a phosphate buffer solution. Dispersing tannic acid in a phosphate buffer solution to obtain a polymerization solution; and the cleaned Cu foil is placed in a polymerization solution and irradiated by an ultraviolet lamp, and the Cu foil with the poly-tannic acid film on the surface is obtained. And the copper foil with the tannic acid film on the surface is further placed in an AgNO3 solution for reaction, and then the Cu foil with the poly-tannic acid film interface compounded with Ag particles is obtained. The poly-tannic acid thin film compounded with the Ag particles improves the interface of the Cu foil to a certain degree. Compared with the prior art, the method has the advantages that the lithium nucleation obstruction and the lithium nucleation overpotential of the Cu foil negative electrode are reduced, and the reversibility of plating / stripping lithium is enhanced, so that an SEI film formed at a negative electrode interface is more stable. And moreover, the generation of lithium dendrites can be effectively inhibited, the cycle performance and safety of the battery are improved, and the cycle service life of the battery is prolonged.