27results about How to "Less structural defects" patented technology

The invention provides a preparation method of a lithium iron phosphate material, a lithium ion battery and electric equipment, and relates to the technical field of batteries. The method comprises the following steps: mixing raw materials of an iron source, a lithium source and a phosphorus source with a reagent serving as a reducing agent and a carbon source, and grinding to obtain precursor powder; wherein the molar ratio of the lithium source to the iron source is 1.03-1.05, and the molar ratio of the iron source to the phosphorus source is 0.965-0.99; carrying out high-temperature treatment on the precursor powder in an inert atmosphere to obtain a lithium iron phosphate base material; and crushing the lithium iron phosphate base material to obtain the lithium iron phosphate material meeting the particle size requirement. The high-capacity and high-compaction lithium iron phosphate material is obtained by accurately controlling key indexes such as the iron-phosphorus ratio, the carbon content, the graphitization degree and the particle size and combining an optimized processing technology, so that the fast charging performance of a lithium ion battery is improved, and the effect of not reducing the electric quantity while the fast charging requirement is met is achieved.

The invention discloses a preparation method of a continuous graphene nanofiber bundle, and relates to the technical field of graphene fiber materials. The preparation method comprises the following steps: preparing and preparing a graphene oxide nanobelt solution, and adding a plasticizer to obtain a spinning solution; injecting the spinning solution into an electrostatic spinning device, performing near-field electrostatic spinning and air curing, and performing curing forming in a coagulating bath to obtain basic graphene oxide fibers; a plurality of fibers are assembled into nanofiber multifilaments in a coagulating bath, and then the nanofiber multifilaments enter a subsequent multi-stage combined drafting process to prepare a GO fiber aggregate; the GO fiber aggregate is immersed in a Lys-Dopa solution for a reaction, and finally the GO fiber aggregate is collected through a twisting process; reducing the collected GO fibers with hydroiodic acid to obtain reduced graphene fibers, and then performing high-temperature graphitization treatment to obtain a graphene nanofiber bundle product; the graphene fiber preparation process is improved from multiple aspects of raw material preparation, spinning and drafting, Lys-Dopa bath, twisting and the like, a new mechanical property improvement scheme is provided, and development of the graphene fiber field in the future is promoted.

The invention relates to a composite material for a deck and a preparation method thereof, belongs to the technical field of composite materials, and solves the problems that the composite material for the deck in the prior art is easy to break in the installation process due to poor toughness and insufficient impact resistance, and is easy to whiten and yellow due to insufficient weather resistance. The invention provides a composite material for a deck. The composite material comprises polypropylene A, chopped glass fibers, a flexibilizer, rare earth stearate, a compatilizer, an antioxidant and a composite light stabilizer, wherein the composite light stabilizer is a master batch prepared by mixing and compounding a low-molecular-weight benzotriazole light stabilizer and a high-molecular-weight hindered amine light stabilizer and then banburying with polypropylene B. The composite material is high in strength and toughness matching degree, and is not easy to break during installation; and the environment tolerance is good, the weather resistance can reach 4-5 levels, the appearance of the floating fiber reaches a superior level, and the floating fiber can be widely applied to decks of various aircrafts and other structures or appearance parts.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of diisopropyl peroxydicarbonate and application of the diisopropyl peroxydicarbonate. The preparation method comprises the following steps: firstly, adding isopropyl chloroformate and an ester-soluble organic solution into a three-necked flask, starting stirring, adding a hydrogen peroxide solution, slowly dropwise adding a sodium hydroxide solution into the three-necked flask when the temperature of a mixture in the flask is stabilized at-5 DEG C, controlling the time and temperature in the reaction process, finally separating out an organic phase, washing with water, and drying to obtain the isopropyl chloroformate. And drying with anhydrous sodium sulfate to obtain the product. According to the preparation method disclosed by the invention, by optimizing and precisely controlling the preparation process conditions, the preparation process is safe and controllable, the obtained diisopropyl peroxydicarbonate is high in yield and good in stability, can be directly used for preparing polyvinylidene fluoride, can be polymerized under a low-temperature condition without adding a chain transfer agent, improves the molecular chain regularity of polyvinylidene fluoride, has few abnormal structures, and is suitable for industrial production. The crystallinity is high, and the comprehensive performance is good.

The invention discloses a simple preparation method of a high-performance film composite forward osmosis membrane, and belongs to the technical field of water treatment. The preparation method comprises the following steps: firstly, selecting a basement membrane with an ultra-large aperture as a supporting layer of the TFC to relieve a concentration polarization phenomenon and provide a larger interface specific surface area for the growth of polyamide; then, a surfactant is introduced into the water-phase solution to further promote the improvement of the effective water delivery area of the membrane. And finally, carrying out interfacial polymerization reaction on the surface of the substrate membrane to synthesize the TFC-FO membrane with higher performance. The TFC-FO membrane prepared through the method has excellent water flux and interception performance, the FO performance of the TFC-FO membrane is continuously improved along with increase of the pore diameter of the supporting layer, and the application potential of the TFC-FO membrane in the technical field of water treatment is greatly improved.

The application discloses a device and method for preparing graphene by electrophoretic hydrodynamic cavitation liquid phase stripping, which comprises a graphite flake raw material slurry tank, a diaphragm pump, a high-pressure pump, an electrophoretic high-pressure liquid phase stripping assembly, a first cyclone separator, a second cyclone separator, a graphene slurry tank and a wastewater tank; the diaphragm pump and the high-pressure pump are installed on a pipeline between the graphite flake raw material slurry tank and an input end of the electrophoretic high-pressure liquid phase stripping assembly; the first cyclone separator and the second cyclone separator are installed on a pipeline connected to an output end of the electrophoretic high-pressure liquid phase stripping assembly; a discharge port of the first cyclone separator is communicated with a feed port of the second cyclone separator; and a discharge port of the second cyclone separator is communicated with the graphene slurry tank. Compared with a traditional chemical method, the device has the advantages of green environmental protection, less defects of graphene structure and better preservation of characteristics of graphene; and compared with a traditional physical method, the device has the advantages of high production efficiency and better dispersibility.

The invention relates to the technical field of cable preparation, in particular to a breakage-resistant photoelectric composite cable for wiring in a narrow space. Comprising a composite crosslinked polyethylene cable protection layer and an optical cable, and the composite crosslinked polyethylene cable protection layer comprises the following components in percentage by mass: 16-18% of precursor powder, 5-6% of a charring agent, 74.6-78% of PE, 0.6-0.8% of triallyl cyanate and 0.4-0.6% of dicumyl peroxide. The cerium nitrate, the yttrium nitrate and the sodium stannate are compounded to prepare the spherical rare earth nano material, and yttrium ions of the yttrium nitrate and the sodium stannate can finally form a crystal material with an approximately spherical polyhedral structure, so that the mechanical property of the composite crosslinked polyethylene cable protection layer is improved; according to the present invention, the composite material is not easily layered and cracked under the long-time pressure bearing condition, the microstructure of the composite material is changed so as to achieve the more compact structure, and the pressure resistance is improved to a certain extent.

The invention relates to the technical field of chemical synthesis, and discloses a PMMA impact modifier and a preparation method and application thereof.The PMMA impact modifier comprises a core layer, a transition layer and a functional shell layer, the core layer is sequentially coated with the transition layer and the functional shell layer, the core layer is a soft monomer crosslinking layer, the transition layer is a soft monomer and hard monomer crosslinking layer, the functional shell layer is a hard monomer crosslinking layer, the functional shell layer contains a photochromic component. Through the multi-layer structural design of the core layer, the transition layer and the functional shell layer, the shock resistance, the optical performance and the functional performance are synergistically improved; the core layer endows the material with good toughness and energy absorption capability, the transition layer effectively buffers performance difference between layers and keeps transparency, and the functional shell layer introduces a photochromic component while ensuring structural rigidity and durability, so that the material has a peep-proof function under the change of illumination conditions; the method is suitable for application scenes with high requirements on safety and functionality, such as PMMA products, automobile glass and the like.

This invention relates to the field of carbon composite materials, specifically providing a MOF-pitch-based porous carbon composite material, its preparation method, and its applications. The preparation method includes the following steps: doping a transition metal oxide and a nitrogen source into a MOF material to obtain a MOF precursor; mixing the MOF precursor with an amine crosslinking agent and oxidized pitch, followed by pre-carbonization and activation to obtain pitch-based porous carbon; and fluorinating the pitch-based porous carbon to obtain the MOF-pitch-based porous carbon composite material. The MOF-pitch-based porous carbon composite material prepared by this method possesses high pore volume, high crush strength, and high initial efficiency, exhibiting excellent electrochemical and electrical properties when used as a negative electrode material for lithium-ion batteries.

The present application relates to the technical field of building engineering, and particularly relates to a wall type damper cantilever wall construction device and a construction method. The construction device comprises a formwork group and a frame module group. The middle part of the formwork group is provided with a rectangular frame opening, which is divided into upper and lower cantilever wall pouring areas. The reinforcing mesh is bundled in the areas, and the embedded parts are fixed. The frame module group comprises slidingly sleeved U-shaped upper and lower mold bases. Diagonal vertical screw rods and screw pipes constitute a first adjusting assembly to control the spacing. The left and right side plates are provided with grooves to install movable formworks. Horizontal screw rods and screw pipes constitute a second adjusting assembly to control the displacement of the movable formworks. The construction method is as follows: the reserved inner formwork of the formwork group is installed, the reinforcing mesh is bundled, the embedded parts are installed, and then the inner formwork is sealed. The frame module group is placed, the movable formworks are positioned to ensure that the channel opening diameters are consistent, the movable formworks are withdrawn, and the upper and lower mold bases are adjusted to be attached to the embedded parts. The concrete is poured synchronously, the formworks are removed after curing, the plain concrete of the channel opening is cut, and finally the damper is installed to realize the integrated molding of the upper and lower cantilever walls.

The invention discloses a nickel-loaded hierarchical porous SAPO-34 catalyst and a preparation method and application thereof.The method comprises the steps that an aluminum source is added into a water solution of a phosphorus source, stirring is conducted, then a template agent and a silicon source are added, stirring and uniform mixing are conducted, and a precursor solution is prepared; carrying out hydrothermal reaction treatment on the precursor solution, and calcining a product to prepare an original SAPO-34 carrier; the preparation method comprises the following steps: putting an original SAPO-34 carrier into an organic acid solution, stirring, and drying and calcining to obtain an acid-treated SAPO-34 carrier; and adding the SAPO-34 carrier subjected to acid treatment into a Ni (NO3) 2 solution, fully stirring and uniformly mixing, drying, and carrying out heat treatment to obtain the nickel-loaded hierarchical porous SAPO-34 catalyst. The method is simple in process and reasonable in design, the catalyst has an excellent hierarchical porous structure and appropriate surface acidity, the reaction activity and selectivity of the catalyst are effectively improved, and the reaction energy efficiency is effectively improved.

The application relates to a method for preparing fluorinated graphene, and belongs to the graphene material field. The preparation method comprises the following steps: mixing and dispersing waste lithium battery recovery graphite powder, an intercalation agent and a dispersing agent in water to form a slurry, keeping the slurry at 40-60 DEG C for 4-8 hours, then spraying the slurry through a high-pressure device to form high-speed jets, and realizing graphite layer peeling through the cross impact of multiple jet beams, then adding a fluorination agent, keeping the slurry at 150-200 DEG C for 6-12 hours, centrifugally separating upper clear liquid, filtering and washing, vacuum drying, and obtaining fluorinated graphene. The application realizes graphite layer peeling through liquid cross impact, has high production efficiency, the obtained graphene sheet layer is regular and neat, has few structural defects, and the performance of the graphene is improved; the peeling strength can be adjusted by adjusting the jet speed, different layer number graphene products can be obtained, and the production is continuous, and the efficiency is relatively high; the raw material is waste lithium battery recovery graphite, the cost is low, the obtained graphene contains oxygen-containing functional groups, and has good water solubility.

The invention discloses a method for preparing a layered PEEK composite material used for a compressor valve plate, belonging to the technical field of composite material preparation technology, including the preparation of an inner layer structure PEEK composite material, the preparation of an outer layer structure PEEK composite material and secondary injection molding. The invention adopts PEEK as a base resin, prepares an inner layer structure material with high mechanical strength and an outer layer structure material with excellent corrosion resistance through composite modification, obtains a layer structure through a secondary injection molding process, enables the product to have excellent corrosion resistance while maintaining the high strength characteristics of PEEK.

The present application relates to the technical field of rubber materials, and specifically discloses a highly flexible rubber material for hydraulic pipes and a preparation method thereof. The rubber material is mainly made of the following raw materials: nitrile rubber, chloroprene rubber, hyperbranched fluoropolymer, dioctyl phthalate, zinc oxide, magnesium oxide, stearic acid, sulfur, accelerator, carbon black, white carbon black, coupling agent, antioxidant; the hyperbranched fluoropolymer is obtained by reacting 2-octenyl succinic anhydride, 3-(2-aminoethylamino)propylamine, diamine, 4,4,4-trifluorobutyric acid, and p-aminophenylacetic acid. The rubber material, through the mutual coordination between the raw materials, has the advantages of high tensile strength, high elongation at break, low compression permanent deformation rate, high resilience, and good flexibility, and can adapt to the application of hydraulic pipes, enhance reliability and safety, and meet market demand.

The invention discloses application of an ionic liquid functionalized copper compound nano-catalyst in degradation of antibiotics. A preparation method of the ionic liquid functionalized copper compound nano-catalyst comprises the following steps: (1) carrying out alkylation reaction on raw materials including 2-mercapto-1-methylimidazole and long-chain halogenated alkane; (2) carrying out ion exchange reaction on a product obtained in the step (1) and bis (trifluoromethanesulfonyl) lithium imide to obtain sulfydryl functionalized ionic liquid; and (3) fully mixing a copper acetate aqueous solution with the sulfydryl functionalized ionic liquid prepared in the step (2), separating to obtain an oil phase containing copper ions, and carrying out precipitation reaction on the oil phase and a strong alkali aqueous solution to obtain the ionic liquid functionalized copper compound nano-catalyst. The ionic liquid functionalized copper compound nano-catalyst disclosed by the invention is novel in structure, the dosage of the photocatalyst is lower when antibiotics are degraded, the degradation efficiency of 90% or above can be realized only in 5 minutes, and excellent catalytic activity and cycling stability are shown.

The invention belongs to the technical field of supercapacitor electrode materials, and relates to an all-solid-state supercapacitor based on a CuCo2O4-PDMT composite electrode and a preparation method thereof.The preparation method comprises the steps that copper nitrate and cobalt nitrate serve as metal sources, and a CuCo2O4 bottom layer is prepared through constant-potential electro-deposition-muffle furnace annealing; 2, 5-dimethylthiophene (DMT) is used as a monomer, a PDMT top layer is prepared through cyclic voltammetry electropolymerization, and a CuCo2O4-PDMT composite electrode is formed; polyethylene glycol (PEG) is used as a gel matrix, lithium perchlorate (LiClO4) is used as an ion source, nano TiO2 is used as a reinforcing agent, and the composite gel electrolyte is prepared through'microwave dissolution-ultraviolet curing '. The composite electrode and the gel electrolyte are assembled into the all-solid-state symmetrical supercapacitor, so that the defects of high electrode electron transmission impedance, low gel electrolyte ion conductivity and insufficient cycling stability of the existing all-solid-state supercapacitor are overcome, and the collaborative construction of the composite electrode conductive network and the gel electrolyte ion channel is realized; and the performance limitation of traditional single component optimization is broken through.

The invention relates to preparation of a sodium-ion battery negative electrode material, and discloses a preparation method and application of a sodium-ion battery hard carbon negative electrode material with a rich closed-pore structure. Porous carbon with a high specific surface area (more open pores) is modified by asphalt, and the modified hard carbon negative electrode material has fewer open pores and abundant closed pores, so that the low voltage (lt) of the negative electrode material can be greatly improved; 0.1 V) platform capacity, and the first coulombic efficiency of the negative electrode material is also effectively improved. The preparation method has the characteristics that the raw material asphalt is low in cost and easy to obtain, the carbon product yield is high, the preparation process method is simple, environment-friendly and the like, and large-scale industrial production is facilitated.

The invention discloses a synthetic quartz crucible, preparation equipment thereof and a method for inhibiting brown rings on the inner surface of the synthetic quartz crucible, and belongs to the technical field of quartz crucibles. The equipment comprises a melting chamber, an air inlet system, an electrode, a helium inlet system, an exhaust system, a mold vacuum system and a mold, the mold, the mold vacuum system and the electrode are all positioned in the melting chamber; the melting chamber is communicated with the air inlet system, the helium inlet system and the exhaust system; the mold vacuum system is arranged on the outer side of the mold to vacuumize the mold; the electrode is arranged above the mold. The gas environment in the melting chamber is controlled through the air inlet system, the helium inlet system and the exhaust system, the vacuum degree in the mold is adjusted through the mold vacuum system, pollution and impurity enrichment on the inner surface of the crucible can be effectively reduced, microbubbles on the inner surface of the crucible can be reduced, and then structural defects caused by bubble breakage are reduced. By adopting the equipment to prepare the synthetic quartz crucible, the number of brown rings on the inner surface of the crucible can be effectively inhibited.

The invention discloses a semiconductor structure and a forming method thereof, and the method comprises the steps: providing an initial substrate which comprises a plurality of active regions; the active regions are etched to form a substrate, the substrate comprises channel regions located in the active regions, and each channel region is provided with at least one convex part or at least one concave part or a combination of a plurality of convex parts and a plurality of concave parts; and forming a storage gate structure on the surface of the channel region, wherein the projection of the convex part or the concave part on the surface of the substrate is located in the projection range of the storage gate structure on the surface of the substrate. According to the semiconductor structure and the forming method thereof, the channel length of a flash memory device is increased, and the erasing efficiency of the device is optimized.

The invention relates to the technical field of membrane separation materials and discloses an SD membrane based on synergistic alcohol phase system interfacial polymerization and a preparation method of the SD membrane. The SD membrane has high flux, controllable desalination rate and excellent operation stability. The preparation method comprises the following steps: (1) adding a polymer into an organic solvent to obtain a mixed solution; (2) continuing to add a pore-foaming agent to obtain a precursor solution; (3) carrying out vacuum defoaming treatment on the precursor solution, and blade-coating the precursor solution on a carrier to obtain a base membrane; (4) sequentially infiltrating the base membrane into the synergetic alcohol phase system solution and the oil phase solution to perform polyamide treatment to obtain an SD membrane; the synergetic alcohol phase system solution comprises an interfacial polymerization amine monomer, a diffusion regulator, a network building agent and a functional copolymerization monomer; the diffusion regulator comprises monohydric alcohol of which the number of carbon atoms is less than or equal to 3; the network building agent comprises polyhydric alcohol with the number of carbon atoms smaller than or equal to 3 or a polymer of the polyhydric alcohol; the functional comonomer comprises an alcohol amine compound with the number of carbon atoms less than or equal to 4; the oil phase solution includes an interfacial polymerization acyl chloride monomer.

The invention provides a two-component sealant which comprises a component A and a component B. The component A comprises the following components in parts by weight: 30-60 parts of alkoxy modified polyisobutene, 1-10 parts of simethicone, 35-55 parts of calcium carbonate, 5-20 parts of silane modified magnesium hydroxide, 0.5-3 parts of fumed silica and 0.2-2 parts of a curing agent. The component B is prepared from the following components in parts by weight: 30 to 60 parts of alkoxy modified polyisobutene, 35 to 55 parts of calcium carbonate, 5 to 20 parts of silane modified magnesium hydroxide, 0.5 to 3 parts of fumed silica, 2 to 8 parts of a cross-linking agent, 1 to 5 parts of a silane coupling agent and 0.05 to 0.5 part of a catalyst. The double-component sealant provided by the technical scheme of the invention not only can improve the bonding strength of the photovoltaic module and reduce the water vapor transmittance, but also can prevent external chloride ions and sodium ions from corroding batteries in the module, and can prolong the service life of the photovoltaic module.

The application discloses a functional ceramic reinforced multiphase refractory brick and a preparation method thereof, and relates to the technical field of refractory bricks. The functional ceramic reinforced multiphase refractory brick is prepared from the following components in parts by mass: 25-35 parts of corundum, 15-20 parts of silicon carbide, 12-18 parts of mullite, 1-2 parts of lanthanum oxide, 8-12 parts of silicon nitride, 5-10 parts of zirconium oxide, 2-4 parts of borax, 1-3 parts of titanium dioxide, 4-6 parts of calcium aluminate cement, 0.5-1.5 parts of a metal chelating agent, 0.2-0.5 parts of sodium hexametaphosphate and 3-5 parts of deionized water. Compared with the general metal chelating agent in the prior art, the specific structure metal chelating agent used in the application can form stable chelates with metal ions in the raw materials, strengthens the interface bonding between inorganic particles, inhibits the migration and agglomeration of metal ions at high temperatures, reduces structural defects and improves the overall stability of the brick body.

The application discloses a kind of based on laminated continuous fiber periodic structure path planning method and device, the method includes: according to the configuration of the first preset rule to determine to select periodicity single cell structure;Based on single cell structure in design domain division unit, and based on all units in design domain to single cell structure is arranged and combined processing;Based on the connection relationship between the nodes of the configuration of all single cell structures in design domain is determined by preset minimum distance, and the adjacent matrix indicating node connection relationship is established;Based on adjacent matrix, initial node and traversal direction, according to the second preset rule is carried out path planning to obtain based on laminated continuous fiber periodic single cell structure path.The application can realize the path planning of periodic structure of complex single cell type composition and the periodic single cell structure of different single cell type combination, and combined with composite laminated idea to reduce the structural defects caused by fiber dislocation when 3D printing periodic structure.

This invention relates to a large effective area ultra-low attenuation multi-core optical fiber and its applications. The large effective area ultra-low attenuation multi-core optical fiber includes at least four core layers and a common cladding surrounding and covering the core layers. The core layers are symmetrically and uniformly distributed across the fiber cross-section. Each core layer is surrounded by an inner cladding and a recessed inner cladding layer, arranged sequentially from the inside to the outside. The common cladding layer includes a first outer cladding layer and a second outer cladding layer. The relative refractive index difference between the first and second outer cladding layers increases from the inside to the outside. This invention, through a multi-layer cladding structure of "inner cladding-recessed inner cladding-first outer cladding-second outer cladding layer," combined with the increasing relative refractive index difference between the first and second outer cladding layers from the inside to the outside, achieves a synergistic improvement in ultra-low attenuation, large effective area, ultra-low inter-core crosstalk, excellent bending resistance, and good system compatibility, providing an ideal transmission medium for long-distance, high-capacity space-division multiplexing optical communication systems.

The present invention provides a thin film transistor, a manufacturing method thereof and a display panel. The manufacturing method of the thin film transistor includes: a substrate; a gate layer and a gate insulating layer sequentially located on the substrate; a hydrogen-containing layer located on the gate insulating layer; a semiconductor layer located on the hydrogen-containing layer, the semiconductor layer including a source doping region and a drain doping region, the source doping region and the drain doping region are respectively arranged at two ends of the semiconductor layer at intervals; a source electrode layer and a drain electrode layer are respectively located on the source doping region and the drain doping region. By forming a hydrogen-containing layer between the gate insulating layer and the semiconductor layer, the atomic structure in the gate insulating layer is optimized, the structural defects are reduced, the threshold voltage is reduced, and the on-state current is increased, so as to improve the device performance, thereby improving the yield and reliability of the panel.

The invention provides a method for forming a semiconductor structure, and relates to the technical field of semiconductors. The forming method comprises the following steps: forming an initial semiconductor structure which comprises a plurality of channels; a laminated structure is formed in each channel, the laminated structure extends to the surface of the initial semiconductor structure, and the laminated structure comprises an insulating layer, an oxide layer and a sacrificial layer; protective gas and auxiliary gas are introduced into the channels and react, so that a protective layer is formed on the surface of the sacrificial layer in a conformal mode, the protective gas comprises silicon ions, and the auxiliary gas comprises oxygen ions; and etching the laminated structure with the protective layer, removing a part of the laminated structure at the bottom of the channel and removing the laminated structure on the surface of the functional layer so as to expose the surfaces of the substrate and the functional layer. According to the invention, the protection layers are formed on the film layers in the channel of the etching device, so that the integrity of the morphology of the etched film layers and the etching contour is ensured, and a good structural basis is provided for the subsequent technological process of the device.

The present invention belongs to the field of biomedical technology, and relates to a flexible neural electrode and a preparation method thereof. After the initial neural electrode is treated with oxygen plasma, the initial neural electrode is immersed in a dopamine hydrochloride solution for a first electropolymerization to obtain a neural electrode with a modified electropolymerized PDA layer, and then the neural electrode with the modified electropolymerized PDA layer is immersed in an EDOT solution for a second electropolymerization, and then annealing is performed to obtain a flexible neural electrode. The present invention introduces a composite layer composed of an electropolymerized PDA layer located below and an electropolymerized PEDOT layer located above at the electrode site of the initial neural electrode, thereby significantly enhancing the interface bonding force, improving the conductivity, stability and biocompatibility of the electrode, thereby extending the service life of the neural electrode, and solving the problem of easy detachment and performance degradation of the PEDOT coating in the prior art.