46 results about "Graphene quantum dot" patented technology

This invention relates to the field of battery material preparation technology, and particularly to a high-capacity ultra-fast charging graphite composite anode material, its preparation method, and its application. The graphite composite anode material comprises, from the inside out: a graphite core, a hierarchical porous hard carbon layer, and graphene quantum dots; the graphene quantum dots are distributed within the pores and on the surface of the hierarchical porous hard carbon layer. Through a carefully designed gradient structure, this invention significantly improves the reversible capacity and cycle stability of the material while ensuring high initial coulombic efficiency.

The application provides a method for repairing waste positive electrode materials, which comprises the following steps: mixing waste positive electrode materials, graphene quantum dots containing amino groups and a solvent, and then removing the solvent to obtain a coated material; mixing the coated material with an organic lithium salt and performing heat treatment to obtain a heat-treated material, and then mixing the heat-treated material with an inorganic lithium salt and performing calcination to obtain repaired waste positive electrode materials. The method for repairing waste positive electrode materials promotes subsequent lithium supplement by coating graphene quantum dots containing amino groups in advance, and then performs lithium supplement in stages, first introduces an organic lithium salt to realize pre-lithium supplement, and finally introduces an inorganic lithium salt to perform lithium supplement, so that the surface conductive modification, lattice defect repair and electrochemical performance of the waste positive electrode materials are greatly improved.

This invention relates to a method for preparing a graphene-based coated iron catalyst for the deep removal of trace amounts of acetylene and ethylene impurities from electronic-grade hydrogen chloride, belonging to the field of catalyst technology. The method involves dispersing phenolic resin and graphene quantum dots in toluene, adding allyltrimethylammonium bromide, ferrocene methylamine, and sodium ethoxide, heating and stirring the reaction, and adjusting the pH with acetic acid. Citric acid and ferric acetylacetone are then added, and the mixture is stirred. Sodium borohydride is added in two stages, and the reaction is continued with stirring to obtain a gel precursor. The gel precursor is then ultrasonically dispersed, dried, and subjected to staged heating in a nitrogen-hydrogen atmosphere to obtain the resin-based coated iron catalyst. The catalyst prepared by this invention can effectively remove trace amounts of acetylene and ethylene impurities from electronic-grade hydrogen chloride, improving the purity of electronic-grade hydrogen chloride.

This invention relates to the field of graphene quantum dot film technology, and discloses a graphene quantum dot film, its preparation method, and its applications. The film is composed of the following components: modified graphene quantum dots, inorganic nanoparticles, a polymer matrix, a dispersant, a crosslinking agent, and additives. Through the optimized integration of raw material design and preparation process, the graphene quantum dot film of this invention achieves a synergistic improvement in both microstructure and macroscopic performance. From a macroscopic perspective, the film's transmittance reaches a maximum of 91.3% at 550 nm, and its light absorption coefficient reaches 4.0 × 10⁻⁶. 4 cm ‑1 The material exhibits a maximum tensile strength of 48.6 MPa and an elongation at break of 4.5%, and maintains a high performance retention rate even after humid heat and ultraviolet light aging. These superior properties are attributed to the synergistic effect of modified graphene quantum dots, modified inorganic nanoparticles, and optimized polymer matrices, as well as the regulation of processes such as segmented ultrasonication-intermittent stirring and gradient curing.

Nanoparticles made of a metal oxide are heated to a temperature of from 70°C to less than 350°C. Graphene quantum dots are deposited on the surface of the nanoparticles made of a metal oxide by bringing a carbon-containing compound into contact with the nanoparticles made of a metal oxide while maintaining this heated state, thereby forming graphene-nanoparticle composites having the nanoparticles made of a metal oxide and graphene quantum dots deposited thereon.

The application discloses a fluorescent particle induced ultra-transmittance radiation refrigeration film and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing DCPDA monomers, graphene quantum dot dispersion liquid and an ultraviolet curing agent to obtain a mixed solution; concentrating the mixed solution to obtain a casting solution; coating the casting solution on the surface of a substrate to obtain a wet film; and curing the wet film to obtain the fluorescent particle induced ultra-transmittance radiation refrigeration film. By introducing the fluorescent particles into a polymer matrix and adding the ultraviolet curing agent, the fluorescent particle induced ultra-transmittance radiation refrigeration film is formed, the high transmittance of sunlight and the high infrared emissivity are realized, the radiation refrigeration performance of the fluorescent particle induced ultra-transmittance radiation refrigeration film is excellent, and the fluorescent particle induced ultra-transmittance radiation refrigeration film is suitable for building energy saving, photovoltaic cell cooling and cold chain transportation and the like. The preparation process is simple and suitable for large-scale application.

This invention relates to the fields of medical device technology, biosignal processing, and artificial intelligence-assisted diagnostic technology. Specifically, it relates to a non-invasive dynamic monitoring system and method for gastric function based on quantum sensing and multimodal artificial intelligence. The system includes a quantum dot biosensor array, a multimodal signal fusion processor, an artificial intelligence dynamic evaluation algorithm, and a cloud-based collaborative diagnostic platform. The quantum sensor uses graphene quantum dot material and achieves 128-channel parallel acquisition through capacitive coupling. In this invention, by setting up the quantum dot biosensor, the sensitivity reaches the single-photon level, the resolution is 0.1μV, the frequency response range is 0.01-100Hz, and the anti-interference capability is 90dB common-mode rejection ratio, thus improving signal acquisition accuracy and anti-interference capability.

The application provides an antistatic resin composition for electric wire and cable and a preparation method thereof, and belongs to the technical field of polymer material processing, and the preparation method comprises the following steps: S1: preparing a quaternary ammonium salt type ionic liquid-graphene quantum dot composite; S2: plasma pre-activation treatment of a main body resin; S3: targeted grafting and compounding of the activated main body resin and the composite; S4: multi-component gradient compatible compounding; and S5: dynamic vulcanization-extrusion molding. The application solves the problems of unstable performance, poor component compatibility and low process controllability of the existing antistatic resin, and through component optimization and process innovation, finally obtains a resin composition which is durable in antistatic performance, resistant to aging and wear, uniform in performance, strong in process controllability and suitable for large-scale production, and can be widely applied to scenes such as mines, chemical industry and electronics which have strict requirements on the antistatic performance of electric wire and cable.

This invention discloses Ti3C2T x This research focuses on the aerogel growth of gold nanomaterials using (MXene) / functionalized graphene quantum dots and their applications, belonging to the field of organophosphorus pesticide analysis and detection technology. Citric acid, serine, and arginine were dissolved in deionized water and heated to obtain citrate-arginine-serine quantum dots; Ti3A1C2(MAX) was then etched using lithium fluoride and hydrochloric acid to obtain Ti3C2T. x (MXene); To Ti3C2T x A quantum dot solution was added dropwise to generate a microgel; a gold nanoparticle growth solution was added dropwise to the microgel, followed by incubation with chloroauric acid and then a reducing agent. After the reaction was complete, the mixture was centrifuged, washed, and vacuum dried to obtain graphene quantum dot-functionalized gold nanoparticles. This invention utilizes the superior conductivity of Ti3C2T... x Gold nanoparticles were grown on functionalized graphene quantum dot microgels and used as electrocatalytic active materials. An electrochemical sensor was constructed using aptamers as recognition molecules to detect the organophosphorus pesticide methamidophos.

This invention relates to the field of groundwater pollution remediation technology, specifically to a multifunctional synergistic filler and a green electricity-driven electrochemical groundwater remediation method. The filler uses attapulgite or montmorillonite-modified biomass pyrolytic carbon as a substrate, in-situ constructing a three-dimensional interconnected conductive network of graphene quantum dots and carboxylated carbon nanotubes. It anchors bifunctional catalytic sites composed of layered bimetallic hydroxides and defective metal oxides, possessing multiple functions including water permeability, adsorption and capture, electron transfer, and electrocatalytic reduction. Based on this filler, this invention constructs an e-PRB remediation wall, using solar green electricity to drive a fluctuating electric field to enhance the directional migration and in-situ fixation of heavy metals. An integrated multi-field coupling numerical model and dual intelligent control algorithm enable adaptive operation, simultaneously completing targeted heavy metal remediation, resource recovery, and in-situ regeneration of the filler. This method boasts high remediation efficiency, low carbon footprint, and environmental friendliness, making it suitable for various in-situ remediation scenarios for heavy metal pollution in groundwater.

The application provides a composite energy transmission layer-based evaporation isotopic battery and a preparation method thereof, relates to the technical field of isotopic batteries, and comprises a radioactive source layer, a semiconductor material layer and a graphene quantum dot composite energy transmission layer arranged between the two layers. The graphene quantum dot composite energy transmission layer is formed by compounding graphene quantum dots and graphene-based materials. The graphene quantum dots generate fluorescent radiation under the excitation of radioactive source radiation. The fluorescent radiation is at least partially absorbed by a semiconductor energy conversion unit formed by the contact between the composite energy transmission layer and the semiconductor material layer, and an electron-hole pair is generated to realize electric energy output. Meanwhile, the semiconductor energy conversion unit can also directly respond to radioactive source radiation to generate an electron-hole pair to realize electric energy output. The application improves the energy utilization efficiency of the evaporation isotopic battery by constructing a composite energy utilization path of radiation energy + light energy-electric energy.

This invention discloses a functionalized graphene quantum dot fluorescent ink composition and its preparation method, belonging to the technical field of anti-counterfeiting printing functional materials. The ink composition, based on a total weight of 100 parts, comprises 0.8-2.5 parts of graphene quantum dots co-modified with phosphonic acid and poly(N-vinylcaprolactam), 25-40 parts of an aqueous polyurethane dispersion, 0.5-1.5 parts of benzo-15-crown-5-carboxylic acid, 0.3-0.8 parts of a dispersant, 0.2-0.6 parts of a leveling agent, 0.1-0.3 parts of a defoamer, and the balance being deionized water. The quantum dots are prepared by a one-step hydrothermal method using citric acid, N-vinylcaprolactam, and vinylphosphonic acid as core raw materials in the presence of an initiator and a crosslinking agent. The ink of this invention simultaneously possesses photoluminescence, temperature response, and Fe... 3+ It features a triple anti-counterfeiting function with specific identification, and there is a synergistic enhancement effect between temperature sensitivity and ion response. At the same time, the ink has excellent storage stability and printability, making it suitable for high-end anti-counterfeiting fields.

This invention relates to the field of biosensor technology, and in particular to an electrochemiluminescence sensor, its fabrication method, and its applications. The sensor comprises a three-electrode system, wherein the working electrode includes a substrate electrode, an amino-functionalized vertically ordered mesoporous silica film formed on the surface of the substrate electrode, and nitrogen-doped graphene quantum dots confined within the amino-functionalized vertically ordered mesoporous silica film; the electrolyte used in the sensor is a phosphate buffer containing luminol. This invention achieves highly sensitive and selective detection of superoxide dismutase (SOD) by constructing an electrode modified with nitrogen-doped graphene quantum dots confined within an amino-functionalized vertically ordered mesoporous silica film, utilizing its enhanced luminol-dissolved oxygen electrochemiluminescence signal and the specific quenching effect of SOD on superoxide anions.

This invention provides an efficient method for preparing halogen-doped graphene quantum dots, comprising the following steps: adding 1,3,6-trinitropyrene to a polytetrafluoroethylene reactor, adding a halobenzene solvent, ultrasonically dispersing the mixture, and then carrying out a solvothermal reaction. After the reactor cools to room temperature, the solvent is removed by a rotary evaporator, finally obtaining graphene quantum dot powder. Using halobenzene as both solvent and dopant source enables one-step completion of doping and synthesis, avoiding the need for additional dopants and catalysts. The reaction system is simple, the process flow is greatly simplified, and the preparation cycle is significantly shortened.

The present application relates to the technical field of plant breeding, and discloses a method for efficiently inducing peony subterranean bud polyploidy and application thereof, comprising subterranean bud disinfection, cell synchronization, minimally invasive pretreatment, preparation of CS- Alg / PPy photothermal response slow-release microspheres, loading of composite inducer, microsphere implantation and photothermal regulation induction, polyploidy identification screening and transplanting, wherein the composite inducer comprises colchicine, 6-BA and graphene quantum dots, can block chromosome separation, realize cell chromosome doubling, regulate growth point cell division, simultaneously repair cell damage, improve bud survival rate, assist photothermal regulation to realize precise drug release, and promote expression of polyploid plant excellent traits. The method has high induction rate, high homozygosity and high bud survival rate, is suitable for cultivation of ornamental, cut flower, medicinal and stress-resistant peonies, and is advanced and practical in technology.

The present application relates to the technical field of multilayer film, disclose a kind of high transmittance multilayer composite optical film and preparation method thereof, the optical film includes polyester base film, pre-coating and functional coating from bottom to top;Pre-coating includes A layer and B layer from bottom to top;Polyester base film refractive index > A layer refractive index > B layer refractive index;A layer includes the following components: water-based polyester resin, water-based polyurethane resin, hydroxyl silicon dioxide, titanate coupling agent, curing agent and water;B layer includes the following components: water-based polyurethane resin, water-based epoxy acrylic resin, carboxylated graphene quantum dots, curing agent and water.The present application utilizes double-layer pre-coating structure, and there is good adhesion between pre-coating and polyester base film, functional coating and between the layers of pre-coating, while by regulating the refractive index of pre-coating, the interference of reflected light at the interface of polyester base film and coating is cancelled, and then the transmittance of optical film is improved.

The application relates to the technical field of intelligent materials, in particular to a conductive composite fiber based on graphene and graphene quantum dot bridging and a preparation method thereof. The application precisely regulates the spherical morphology of graphene quantum dots through a hierarchical ultrasonic-freezing template method, constructs a micron-level groove structure on the surface of a hybrid material by using plasma etching-mechanical embedding, forms a'mortise and tenon' type interface reinforced composite through the synergistic action of physical embedding-pi stacking, and finally realizes the axial directional arrangement of a conductive network by combining airflow field regulation spinning. The application adopts physical means throughout the process, ensures the safety of the material, and the obtained fiber has fast photo-thermal response, high conductivity and excellent stability, the preparation method is simple, and the application is suitable for industrial production.

The present invention relates to granular cotton containing graphene quantum dot-containing polyester fibers, and to a filling containing the same. [Solution] The granular cotton of the present invention comprises a polyester fiber containing graphene quantum dots with a particle size of 10 nm or less, and synthetic fibers other than polyester fibers.

The application belongs to the technical field of composite electrode materials, and relates to a preparation method of a ternary CoS / NiCoAl-LDH / NGQDs heterostructure electrode material and application thereof. First, carbon cloth is immersed in a solution containing cobalt ions and 2-methyl imidazole, so that a cobalt-based metal organic framework (Co-MOF) array is grown in situ on the carbon cloth substrate. Then, through hydrothermal sulfidation treatment, the Co-MOF precursor is converted into hollow cobalt sulfide (CoS) nanotubes. Second, a nickel-cobalt-aluminum layered double hydroxide (NiCoAl-LDH) nanosheet is uniformly deposited on the surface of the CoS nanotube by electrodeposition, so as to form a hierarchical core-shell structure. Finally, nitrogen-doped graphene quantum dots (NGQDs) are anchored on the surface of the composite material through electrostatic adsorption, so as to complete the construction of the ternary heterostructure. The core advantage of the application lies in the directional construction of a synergistic interface, and each component solves different key problems: CoS provides a stable conductive network, NiCoAl-LDH endows multiple-electron redox reaction activity, and NGQDs improve the interface stability and charge injection efficiency.

This invention discloses a method for the large-scale preparation of porous graphene-based two-dimensional sheet materials. The method includes: S1, preparation of porous graphene-based two-dimensional sheet materials: graphene quantum dot aqueous solution and a polyacrylamide chloride organic solution are added sequentially to a reaction flask for interfacial polymerization, resulting in porous graphene-based two-dimensional sheet materials at the interface; S2, large-scale preparation: immediately following S1, the interfacial polymerization time is extended to 1-24 hours. By increasing the number of reaction flasks, the yield of porous graphene-based two-dimensional sheet materials is multiplied, achieving large-scale preparation. This invention utilizes graphene quantum dots as the main component and restricts the growth of porous graphene to a two-dimensional interface from bottom to top through free interfacial polymerization. Large-scale preparation is achieved by extending the interfacial polymerization time. From the initial synthesis stage to the reaction termination, the morphology and structure of the porous graphene-based two-dimensional sheet materials remain stable throughout, providing a new approach for the low-cost large-scale preparation of porous graphene-based two-dimensional sheet materials.

This invention relates to the field of functional fiber materials technology, specifically disclosing a multifunctional graphene masterbatch and its application in antibacterial and cooling fibers. This invention employs purely physical exfoliation to prepare high lattice integrity (Raman spectroscopy). D / I G Graphene quantum dots with a particle size ≤0.14 are pre-composite and melt-spun under vacuum freeze-drying to achieve uniform dispersion and axial orientation within the fiber. The resulting fiber exhibits a tensile strength of 5.3 cN / dtex, a thermal conductivity of 0.27 W / (m·K), and an antibacterial rate >99.9% against Staphylococcus aureus and Escherichia coli. This antibacterial rate remains above 99% after 50 washes and above 95% after 100 washes, demonstrating exceptional durability, and without the leaching of chemical antibacterial agents. This invention achieves fiber reinforcement, a cooling sensation, and long-lasting safe antibacterial properties simultaneously through a purely physical process.

This invention discloses a high-gloss antibacterial ceramic glaze and its preparation method, relating to the field of ceramic glaze technology. By weight, its raw material composition includes: 75-85 parts of base glaze, 8-10 parts of antibacterial system, 6-10 parts of nucleating agent, 3-8 parts of colorant, 1.5-3 parts of auxiliary agent, 0.2-1.5 parts of functional additive, and 0.5-1.5 parts of nano-glossing agent. The functional additive is a compound of graphene quantum dots, quaternary ammonium salt modified montmorillonite, and rare earth carbonates in a weight ratio of (0.02-0.08):(0.1-0.3):(0.1-1). This ceramic glaze achieves a balance of high gloss, efficient and long-lasting antibacterial effect, and excellent glaze quality.

The present application belongs to the field of nanometer carbon material preparation, discloses a kind of carbon quantum dots and preparation method thereof prepared by waste recovery, suitable for UV curing coating application, aims at solving the problems such as poor batch consistency of carbon dots prepared from waste and insufficient compatibility with coating, realizes the high value closed loop of electrochemical aluminum / transfer film waste coating waste material.The present application uses the waste coating waste material containing nitrogen polymer in the industry as raw material, after pre-classification and alkali alcohol mixed solvent pretreatment, hydrothermal carbonization and purification, surface modification is completed by UV photochemical grafting specific UV curing monomer, and 2-10nm nitrogen-doped graphene quantum dot powder is prepared;The process parameters such as hydrothermal and grafting are optimized, to realize the covalent bonding of carbon quantum dots and UV curing coating.The raw material of the present application is green and low cost, the batch consistency of the product is significantly improved, the compatibility and storage stability of the coating are greatly improved, and after adding, the fluorescence anti-counterfeiting and curing tracing of UV curing coating can be realized, which meets the requirements of double carbon target and new material industry development.

This invention discloses a triple-junction concentrating solar cell with a graphene quantum dot ultraviolet energy management layer and its fabrication method, solving the problems of severe ultraviolet irradiation damage, concentrated hot spots, and rapid efficiency decay in existing triple-junction concentrating solar cells under high-concentration light, as well as the large energy waste and poor material stability of traditional ultraviolet management schemes. This invention adds a graphene quantum dot composite material layer to the cell surface, and through surface state modulation, enables the graphene quantum dots to primarily undergo non-radiative recombination, efficiently converting ultraviolet photon energy into heat energy. Preferably, the composite material layer is designed as a patterned structure matched with the metal grid electrodes, achieving localized heat generation and rapid heat dissipation. This invention suppresses ultraviolet irradiation damage and localized hot spot formation at the source without affecting the cell's absorption of the effective spectrum, significantly improving the cell's photoelectric conversion efficiency, long-term reliability, and lifespan. The overall solution is fully compatible with existing semiconductor fabrication processes, facilitating large-scale mass production and industrial application.

The application relates to the technical field of anti-fake printing ink, and discloses a printing adaptability improvement method of functionalized graphene quantum dot composite anti-fake fluorescent ink. The method is characterized in that: the graphene quantum dots are sequentially subjected to silane coupling agent hydrolysis condensation treatment and oligomer grafting treatment, cross-linking functional groups and anchoring groups are introduced, and then the graphene quantum dots are mixed with connecting material resin and a boronic acid group-containing cross-linking agent to prepare the composite anti-fake fluorescent ink. The ink exhibits excellent fluorescent maintenance performance in the drying process after printing, the process condition is mild, raw materials are easy to obtain, and the existing printing equipment can be adapted.

The application discloses an application of graphene quantum dots, and a zinc ion battery electrolyte and a zinc ion battery. The application is specifically an application of graphene quantum dots with electronegative groups containing nitrogen, sulfur and oxygen on the surface as electrolyte additives of the zinc ion battery. The graphene quantum dots as the electrolyte additives can adsorb zinc ions in the electrolyte solution, uniformly co-deposit on the negative electrode surface, and then induce the zinc ions to preferentially deposit along the (002) crystal surface parallel to the electrode surface, so that the formation of zinc dendrites is fundamentally inhibited. In addition, the graphene quantum dots are light in mass, do not affect the energy density of the battery, are stable in performance, do not produce side reactions, can be recycled in the charging and discharging process, and achieve long-time performance improvement. The aqueous zinc ion battery with the graphene quantum dots added in the electrolyte can continuously light up an LED array, and has a good prospect in the field of high-energy-density zinc ion batteries.

This invention discloses a high-performance polyether ketone ketone fine synthesis process, including the following steps: Step 1: raw material preparation; Step 2: raw material pretreatment; Step 3: monomer activation; Step 4: segmented polymerization; Step 5: gradient post-treatment. This invention achieves precise targeted modification of different performance shortcomings of polyether ketone ketone through hydroxyl-terminated bisphenoxyphenyl sulfone, rare earth modified hexaphenoxycyclotriphosphazene, amino-based graphene quantum dots, and fluorinated aryl end-capping agents. Unlike conventional methods of single-component modification or physical blending, this invention achieves synergistic effects through intermolecular hydrogen bonding and chemical bonding, fundamentally solving the limitations of traditional polyether ketone ketone performance improvement and realizing systematic optimization of comprehensive performance.

The invention discloses a method and a system for directionally removing non-volatile acid radicals and recovering urea in high-concentration urea wastewater, and belongs to the technical field of wastewater treatment and resource recovery. The method comprises the following steps: firstly, introducing wastewater into a pretreatment unit, adding a synergistic treatment agent compounded by alkali metal salt, an organic complexing agent and nano catalytic particles, and directionally precipitating non-volatile acid radicals to form a compact precipitate; intensified solid-liquid separation is completed through an ultrasonic-assisted horizontal spiral discharging sedimentation centrifuge, residual acid radicals in supernate are deeply adsorbed through graphene quantum dot-temperature responsive magnetic nanoparticle composite modified anion exchange resin, and the acid radicals are almost completely removed; then, urea is concentrated by adopting a low-temperature evaporation-waste heat recovery coupling process, and high-purity urea crystals are separated out through segmented temperature-pressure gradient crystallization; the resin saturated by adsorption is separated and recovered through a magnetic field, and is recycled after temperature regulation and mild regeneration; the method is suitable for resourceful treatment of industrial high-concentration urea wastewater.

This invention discloses a high-penetration anti-fouling protective film, comprising: a substrate layer; and a high-penetration pitting coating, which is laminated onto the upper surface of the substrate layer via a light-transmitting adhesive layer and consists of the following components in parts by weight: 4-5 parts fluorinated polyether acrylate, 3-4.5 parts titanium dioxide dispersion, 0.5-1 part nitrogen heterocyclic monomer, 0.05-0.1 part azo initiator, 0.01-0.1 part graphene quantum dots, 0.1-0.3 parts photoinitiator, 0.1-0.3 parts crosslinking agent, and 85-90 parts organic solvent. This invention exhibits excellent high-penetration performance, making it suitable for applications requiring extremely high light transmittance, such as electronic product screens and outdoor glass; it also demonstrates outstanding anti-fouling performance; and its overall performance is excellent, possessing not only high penetration and strong anti-fouling properties but also good wear resistance and anti-yellowing properties, with strong adhesion between the coating and the substrate; furthermore, its preparation process is simple and its production cost is low.

This invention relates to the field of carbon nanotube technology, specifically disclosing a high-pressure resistant carbon nanomaterial composite conductive agent and its preparation method. The raw materials for this high-pressure resistant carbon nanomaterial composite conductive agent include passivated single-walled carbon nanotubes, nano-alumina-coated graphene quantum dots, cationic surfactants, anhydrous ethanol, and deionized water. This invention successfully constructs a composite conductive agent that possesses high-pressure electrochemical stability, retention of the conductive network structure under high voltage solid density, and good processing adaptability through an organic combination of fluorination passivation, nano-alumina coating, and electrostatic self-assembly of cationic surfactants.