196 results about "Carbon nanofiber" patented technology

The invention discloses a method for enriching light metal ions in a pore channel based on carbon nanofiber / carbon fiber nano confinement, and belongs to the technical field of sample pretreatment, and the method comprises the following steps: S1, preparing a carbon nanofiber / carbon fiber confinement material; and S2, putting the carbon nanofiber / carbon fiber confinement material obtained in S1 into a light metal ion solution, and stirring. According to the method for enriching the light metal ions in the pore channel based on the carbon nanofiber / carbon fiber nano confinement, the carbon nanofiber / carbon fiber is used as a confinement fluid carrier, ultrapure water, methanol or n-hexane is used as an extracting agent, a chelating agent does not need to be introduced, the method is green and environmentally friendly, the mass transfer rate is increased, and the method is suitable for large-scale industrial production. Therefore, high enrichment of light metal ions in water is realized.

The invention provides a preparation method of a graphene carbon nanofiber film for oil-water separation, and relates to the field of oil-water separation membranes, and the preparation method comprises the following steps: mixing polyacrylonitrile powder and an N, N-dimethylformamide solution to obtain an electrostatic spinning solution; spinning through an electrostatic spinning machine to obtain a polyacrylonitrile fiber membrane; coating the polyacrylonitrile fiber film with the prefabricated graphene oxide dispersion liquid to obtain a graphene oxide / polyacrylonitrile composite film; carrying out pre-oxidation, activation and carbonization treatment on the composite film to obtain a graphene carbon nanofiber film; according to the method, the waste isostatic pressing graphite which is low in price and easy to obtain is adopted as the raw material, the ammonia activation means is combined, improvement is carried out on the basis of a Hummers method, graphene oxide is prepared, resource recycling is achieved, the isostatic pressing graphite waste generated in the production process is recycled and processed into a product with a high additional value, and therefore the purposes of reducing the production cost and saving resources are achieved.

The invention discloses a solid-state battery negative electrode material and a preparation method and application thereof, and relates to the technical field of solid-state batteries. The preparation method comprises the following steps: uniformly mixing silicon nanowires, silicon nanoparticles, a carbon nanofiber precursor material and a solvent, preparing a negative electrode material precursor by adopting electrostatic spinning, and carrying out pre-oxidation treatment and carbonization treatment to prepare the solid-state battery negative electrode material, wherein the mass ratio of the silicon nanowires to the silicon nanoparticles is 1: (0.1-4). According to the invention, the silicon nanowires and the silicon nanoparticles are cooperated, and the carbon nanofibers are used as a carrier to form a three-dimensional network structure, so that the diffusion path, anisotropic stress distribution and crushing resistance of Li can be shortened, the cycle performance is improved, and the carbon nanofibers not only improve the mechanical stability of Si in the cycle process, but also provide good conductivity for the electrode. The problems of volume change and low conductivity of the silicon negative electrode material in the use process are effectively solved, and the interface stability of the silicon negative electrode material and a solid electrolyte material is enhanced.

The invention relates to the technical field of environmental and biological analysis and detection, in particular to a method for extracting perfluorinated / polyfluorinated compounds based on confinement fluid. The method comprises the following steps: providing a multi-dimensional reticular nanopore material; growing mutually staggered carbon nanofibers on the surface of a substrate through a chemical vapor deposition method; loading a confinement fluid in a pore channel of the multi-dimensional reticular nano-pore channel material; contacting the material with a to-be-detected sample, and extracting; desorbing the extracted material by using a desorption solvent to obtain a desorption solution; and detecting the perfluorinated / polyfluorinated compounds in the desorption solution. A multi-dimensional net-shaped nano pore channel formed by mutual staggering of the carbon nanofibers provides a stable multi-dimensional micro-nano confinement space for confinement fluid. According to the structure, mass transfer and distribution of a target analyte from a complex matrix to a confinement fluid are greatly promoted, so that efficient enrichment of various perfluoro / polyfluoro compounds is realized, and the recovery rate and the detection sensitivity of the method are improved.

The invention relates to a carbon nano reinforced thermoplastic polyurethane composite material as well as a preparation method and application thereof. The composite material is prepared from the following components in parts by mass: 5 to 20 parts of diisocyanate, 10 to 30 parts of oligomer dihydric alcohol, 1 to 10 parts of bifunctional chain extender and 1 to 20 parts of filler, the filler is prepared from the following components in parts by mass: 0.95 to 18 parts of inorganic filler and 0.05 to 2 parts of carbon-based nano filler; preparing a carbon-based nanofiller of flaky carbon nanofibers, tubular carbon nanofibers or fishbone-shaped carbon nanofibers from reaction gas by using a metal catalyst through a chemical vapor deposition method; the metal catalyst is selected from an iron-nickel catalyst or a nickel-copper catalyst, the reaction gas comprises a carbon source gas and a reducing gas, the carbon source gas is selected from carbon monoxide or ethylene, and the reducing gas adopts hydrogen. Compared with the prior art, the material has good mechanical properties and damping performance, especially has excellent normal-temperature damping performance and damping temperature range, and is suitable for 3D printing.

The invention provides a laser-electric coupling Taylor cone bionic electrospinning process method, a folded conductive metamaterial and application, the preparation method comprises the following steps: dissolving a carbon nanotube in N, N-dimethylformamide, stirring and carrying out ultrasonic treatment, then adding polymer powder, and continuously stirring to obtain a precursor solution; in the first stage, electrostatic spinning is carried out, meanwhile, a laser beam with the wavelength of 589-650 nm is focused on a rotating Taylor cone for electrostatic spinning, the treated spinning film is heated in air, heat preservation is carried out, then the temperature is reduced to the room temperature, and in the first stage, heating is carried out firstly, and then heat preservation is carried out; then raising the temperature in the second stage, keeping the temperature, and finally cooling to room temperature; in the coupled field spinning process, the synergistic effect of arrangement of the carbon nanotubes and the carbon nanofibers induced by photo-thermal response, local fluidity enhancement and an electric field jointly promotes axial dispersion and slidable in the fibers and formation of a self-adaptive network; and the folded conductive metamaterial capable of being folded for 10 million times is successfully prepared.

The application discloses a preparation method of a lithium battery negative electrode material Mo2C / NiO@GO carbon nanofiber, and comprises the following steps: S1, weighing nickel oxide, ammonium molybdate tetrahydrate and a solvent and performing ultrasonic treatment; S2, weighing a high-molecular surfactant, adding the high-molecular surfactant into a beaker and stirring at normal temperature to obtain a spinning solution; S3, adopting a needle tube to suck the spinning solution and performing electrostatic spinning to obtain a precursor, taking down the precursor after spinning is completed, and drying the precursor in an oven; S4, pre-sintering the dried precursor; S5, performing suction filtration on the pre-sintered precursor; and performing heat treatment on the suction filtration and drying precursor to obtain the required lithium ion battery negative electrode material. The preparation method of the application obtains the Mo2C / NiO@GO material with a three-dimensional network structure, improves the specific surface area and the conductivity of the negative electrode material, and the obtained battery has high specific capacity and good cycle stability, and has significant economic value.

The invention discloses a silicon-carbon composite negative electrode material and a preparation method thereof, the silicon-carbon composite negative electrode material comprises a core-shell active unit, a conductive network layer and a composite coating layer, the core-shell active unit is a structure formed by loading boron-doped silicon quantum dots in hollow carbon spheres; the composite material is prepared from the following components in percentage by mass: 11 to 18 weight percent of boron-doped silicon quantum dots, 24 to 36 weight percent of hollow carbon spheres, 31 to 42 weight percent of polyimide-derived nitrogen-doped carbon nanofibers, 3 to 8 weight percent of fluorophosphate-aluminum oxide composite coating layer and 2 to 5 weight percent of lithium titanate modified montmorillonite, the mass ratio of fluorophosphate to aluminum oxide in the fluorophosphate-aluminum oxide composite coating layer is 3: 1, the particle size of the boron-doped silicon quantum dots is 2-5nm, the doping amount of the boron element is 1-3at%, and the purity is not lower than 99.95%. The core-shell structure is used for buffering silicon expansion, the nitrogen-doped carbon fiber is used for constructing a high-efficiency conductive network, the composite coating layer is used for stabilizing an interface, and the inorganic dispersed phase is used for inhibiting agglomeration, so that the specific capacity, the cycling stability and the first charge-discharge efficiency of the lithium ion battery are remarkably improved.

The invention relates to the technical field of refractory materials for steelmaking, in particular to a long-life refined ladle brick and a preparation method thereof. The long-life refined ladle brick provided by the invention consists of a mixture and a binding agent, the mixture is prepared from the following raw materials in parts by weight: 55 to 84 parts of RH magnesium aluminate spinel brick reclaimed materials with the particle size of less than or equal to 8mm, 5 to 9 parts of fused magnesia with the particle size of less than or equal to 1mm, 10 to 15 parts of macrocrystalline fused magnesia fine powder and 6 to 15 parts of carbon nanofibers; the binding agent comprises the following raw materials in parts by weight: 1-3 parts of liquid phenolic resin, 1-6 parts of silica sol and 1-2 parts of liquid water glass. The long-life refined ladle brick provided by the invention has the advantages of good volume stability, strong thermal shock resistance, excellent oxidation resistance and slag erosion resistance and long comprehensive service life.

The invention discloses an oxygen-doped carbon nanofiber bifunctional electrocatalytic oxidation film and a preparation method and application thereof. The atomic ratio of nitrogen atoms to oxygen atoms in the oxygen-doped carbon nanofiber bifunctional electrocatalytic oxidation film is 11: (6-15). The catalytic performance of the electrocatalytic oxidation film can be improved by controlling the atomic ratio of nitrogen atoms to oxygen atoms in the oxygen-doped carbon nanofiber bifunctional electrocatalytic oxidation film, and then the catalytic efficiency of the electrocatalytic oxidation film is improved.

This invention belongs to the field of microwave absorbing materials technology, specifically relating to a composite carbon nanofiber microwave absorbing material, its preparation method, and its applications. The composite carbon nanofiber microwave absorbing material is obtained by electrospinning and heat treatment using a polynuclear pentameric acid metal complex as a precursor and polyacrylonitrile as a carbon source. The polynuclear pentameric acid metal complex is any one of trinuclear iron pentameric acid, dinuclear cobalt pentameric acid, and dinuclear nickel pentameric acid. The excellent microwave absorption performance of the composite carbon nanofiber microwave absorbing material in this invention achieves uniform loading of the nanophase, increases the number of heterogeneous interfaces, and enhances dissipation processes such as interfacial polarization, providing a feasible path to solve the common problems of particle agglomeration and impedance mismatch in composite systems.

This invention belongs to the field of lithium-sulfur battery technology, providing a zirconium-based flexible carbon nanofiber membrane, its preparation method, a lithium-sulfur battery cathode, and a lithium-sulfur battery. The preparation method involves mixing a zirconium source, a polymer, and an organic solvent to form a spinning solution; the spinning solution is electrospun to obtain a fiber membrane; the fiber membrane is then carbonized to obtain the zirconium-based flexible carbon nanofiber membrane. This invention yields a zirconium-based flexible carbon nanofiber membrane with high conductivity, a well-structured microstructure, and active sites for zirconium-based compound nanoparticles. The zirconium-based flexible carbon nanofiber membrane with its well-structured microstructure and active sites for zirconium-based compound nanoparticles exhibits excellent chemical / physical adsorption characteristics for polysulfides. Simultaneously, the zirconium-based compound nanoparticles possess excellent electrocatalytic properties, accelerating efficient conversion between polysulfides, achieving efficient electron transfer and ion diffusion, and realizing high sulfur utilization. This results in excellent areal capacity electrochemical performance. When used as a cathode in lithium-sulfur batteries, it enables the lithium-sulfur battery to exhibit outstanding rate performance and cycle stability, promoting the development of lithium-sulfur batteries towards low-altitude economic applications. Furthermore, the zirconium-based flexible carbon nanofiber membrane, when combined with a high-sulfur-loaded sulfur cathode (greater than 6 mg / cm³), further enhances the effectiveness of the process. 2 Together, they constructed a novel "sandwich" sulfur cathode, resulting in a high-capacity lithium-sulfur battery.

The invention discloses a preparation method of a metal-containing closed-pore-rich hard carbon nanofiber material and application of the metal-containing closed-pore-rich hard carbon nanofiber material as a sodium-ion battery negative electrode material. The interior of the metal-containing hard carbon nanofiber material rich in closed pores contains metal, and the outer layer of the metal-containing hard carbon nanofiber material rich in closed pores is a carbon coating layer; the number of closed pores in the metal-containing hard carbon nanofiber material rich in closed pores is greater than the sum of the number of micropores and mesopores. The prepared metal-containing hard carbon nanofiber material rich in closed pores has sufficient sodium storage space, good sodium ion adsorption capacity and good electrolyte barrier property. The sodium storage capacity of the hard carbon negative electrode can be greatly improved, side reactions in the cycle process are inhibited, the cycle stability of the sodium-ion battery negative electrode is improved, and the performance is excellent. Meanwhile, the overall energy density of the battery can be further improved through the self-supporting integrated electrode structure design, and good application prospects are achieved.

This invention belongs to the field of nanomaterials, materials science and energy storage devices, and more specifically, it relates to the development of cathode materials for lithium-ion batteries. The objective of the invention is to improve the efficiency of lithium-ion batteries by ensuring uniform distribution of lithium cobalt phosphate nanoparticles in carbon nanofibers obtained from a single solution using electrospinning and thermal treatment methods, making them suitable for use as cathode materials. The technical result of the invention: it is possible to ensure uniform distribution of lithium cobalt phosphate nanoparticles in carbon nanofibers obtained by electrospinning and thermal treatment, control the morphology and particle size of the cathode material, distribution uniformity, and increase the formation efficiency of the lithium cobalt phosphate cathode by increasing its electrochemical performance. The technical result is achieved by coating lithium cobalt phosphate with carbon by electrospinning and heat treatment, which simplifies and makes the synthesis process more efficient. By simultaneously forming lithium cobalt phosphate with polymer carbonization, the carbon layer is immediately and uniformly coated on the surface of the nanofiber, improving its conductive properties. The material obtained by this method can be used as a high-voltage and long-lasting cathode material, increasing the performance of lithium-ion batteries.

The invention belongs to the technical field of new energy materials, and relates to a preparation method for preparing a copper-doped carbon nanofiber coated cerium-doped manganous oxide composite material serving as a high-cycle-stability zinc positive electrode of an aqueous zinc ion battery by combining an electrostatic spinning method and high-temperature annealing.

The application discloses a CoS2 / CoO heterojunction nanosheet three-dimensional assembled carbon nanofiber material and a preparation method and application thereof, and the preparation method comprises the following steps: S1, preparing ZIF-67 nanoparticles; S2, preparing ZIF-67 / PAN mixed sol, and obtaining a solid carbon fiber film through electrostatic spinning; S3, growing Co(OH)2 / PAN from a template in the presence of Co(NO3)2; and S4, pre-oxidizing in an air atmosphere at 200-300 DEG C, and then performing heat treatment on a reaction product and a sulfur source in a nitrogen atmosphere at a mass ratio of 1:(10-40) at 300-600 DEG C, so that the CoS2 / CoO heterojunction nanosheet three-dimensional assembled carbon nanofiber material is obtained. The PAN used in the method is cheap and easy to obtain, and compared with a traditional method for preparing an electrocatalyst material of a zinc-air battery, the method has the advantages of simple process, low cost, simple operation and large-scale production.

A method for producing sulfurizcd-carbon cathode materials for electrochemical cells involves mixing carbon nanofibers, sulfur, and a monomer (e.g., acrylonitrile) to form a mixture, polymerizing the monomer to encapsulate the nanofibers and sulfur within a polymer matrix (e.g., polyacrylonitrile), and pyrolyzing the matrix to chemically bond carbon from the polymer to the nanofibers and sulfur, yielding sulfurized-carbon particles fused to the nanofibers. The pyrolyzed material forms a fluffy powder that is compressed into a free-standing dry film, wherein the nanofibers and longer nanofiber yarns create a three-dimensional conductive network enhancing mechanical stability and electrical conductivity. The film is laminated to a current collector to form a cathode. Optional pore- loading with molecular sulfur improves capacity and cycle life, achieving >70% sulfur utilization without wet processing solvents.

The application discloses a high-capacity capacitor electrode material and a preparation method thereof, and relates to the technical field of capacitor electrode materials. In the preparation of the high-capacity capacitor electrode material, polyacrylonitrile, lignin, pitch, zinc acetate and acetylacetone iron are uniformly mixed to prepare a spinning solution, and a composite fiber filament is obtained through electrostatic spinning; the composite fiber filament is high-temperature carbonized to obtain a composite carbon nanofiber; polythiophene is polymerized and deposited on the composite carbon nanofiber to obtain a polythiophene modified composite carbon nanofiber; the polythiophene modified composite carbon nanofiber and poly(ethylene glycol) methacrylate are reacted to obtain a functionalized composite carbon nanofiber; the functionalized composite carbon nanofiber, acetylene black and a bonding agent are mixed and ground to obtain a mixed slurry, and the high-capacity capacitor electrode material is prepared by coating and drying the mixed slurry. The high-capacity capacitor electrode material obtained by the application has excellent electrochemical performance.

This invention discloses a ZnF2 gradient-structured carbon nanofiber current collector, comprising porous carbon nanofiber material with an interconnected network structure and ZnF2 distributed within the porous carbon nanofiber material. Along the thickness direction of the current collector, the mass ratio of ZnF2 to the porous carbon nanofiber material continuously increases, ranging from 0.05 to 1:1. This invention simultaneously achieves ZnF2 gradient distribution, directional lithium-ion transport, and in-situ LiF-rich SEI generation, solving two key problems: low internal space utilization and SEI instability in three-dimensional carbon-based current collectors. This invention uses conventional carbon sources such as polyacrylonitrile and raw materials such as zinc acetate, combined with mature electrospinning, carbonization, and plasma fluorination processes. The preparation process is simple, parameters are controllable, and it is suitable for large-scale production, showing significant application prospects in the field of high-performance lithium metal batteries.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a high-entropy alloy composite carbon fiber negative electrode material for a lithium ion battery and a preparation method of the high-entropy alloy composite carbon fiber negative electrode material. The electrical property of the composite material formed by the high-entropy alloy and the carbon nanofibers in an equimolar ratio or nearly equimolar ratio design needs to be further improved. In order to solve the problems, the invention provides the high-entropy alloy composite carbon fiber negative electrode material for the lithium ion battery, the high-entropy alloy composite carbon fiber negative electrode material for the lithium ion battery is an electrode material formed by compounding a high-entropy alloy and carbon nanofibers, and the high-entropy alloy is composed of five or seven metal elements according to a non-equimolar ratio or a near molar ratio. The lithium storage capacity of the material can be effectively enhanced, the synergistic effect among multiple principal elements is fully played, the problem of active dilution caused by'averages' is avoided, and the reversible capacity and cycling stability of the composite negative electrode material are remarkably improved.

The invention discloses a toughened wear-resistant polyester fiber and application thereof. On one hand, the invention provides the toughened wear-resistant polyester fiber, and the toughened wear-resistant polyester fiber is prepared from the following raw material components in parts by mass: 100 parts of PET resin, 6 to 12 parts of modified carbon nanofibers, 2 to 6 parts of nano titanium dioxide, 12 to 18 parts of maleic anhydride grafted polyolefin elastomer, 16 to 24 parts of modified magnesium hydroxide, 6 to 12 parts of coated ammonium polyphosphate and 4 to 8 parts of hydroxylated carbon nanotubes. And 0.3 to 0.5 part of a composite antioxidant. On the other hand, the invention provides a preparation method and application of the toughened wear-resistant polyester fiber. The flame-retardant automobile interior textile fabric has the advantages of excellent toughness, excellent wear resistance, excellent strength, excellent mechanical properties and excellent flame retardance, and can be widely applied to the field of automobile interior textile fabrics.

The invention belongs to the technical field of electrode paste preparation, and particularly relates to an efficient and environment-friendly electrode paste production process. A composite binder and a corncob powder-lignin composite carbonized precursor are prepared, hexamethylenetetramine-melamine resin is used as a composite cross-linking agent, the rigidity and thermal stability of boron modified phenolic resin in the composite binder are enhanced through a B-O bond, a phenolic hydroxyl group of the boron modified phenolic resin and plant pitch form a hydrogen bond, and the plant pitch is subjected to heat preservation and heat preservation. A hydrogen bond-covalent bond cross-linked network is formed under the action of the cross-linking agent, so that the high-temperature structure stability is guaranteed; the corncob powder fixes lignin through a porous framework, multistage pore channels are formed after carbonization, interface gaps are filled, the lignin is pyrolyzed at a high temperature to generate a carbon nano-whisker reinforced framework, thermal stress can be dispersed, interface bonding can be enhanced, and therefore the compactness and high-temperature stability of the electrode paste are improved. In addition, the bio-based composite binder is adopted to replace traditional petroleum-based asphalt, so that the emission of harmful substances is reduced from the source, and the environmental protection benefit and the high performance of the product are both considered.

The invention discloses a method for synthesizing tungsten-doped lithium iron phosphate carbon nano composite fibers by a solvothermal method, and belongs to the technical field of lithium ion battery positive electrode materials. The method comprises the following steps: S1, preparing a polyacrylonitrile spinning solution by taking N, N-dimethylformamide as a solvent, and carrying out electrostatic spinning to obtain a fiber membrane; s2, performing high-temperature calcination on the fiber membrane in the step S1 to prepare a carbon nanofiber material; s3, dissolving an iron source, a lithium source, a phosphorus source and a tungsten source in a solvent, adding the carbon nanofiber material prepared in the step S2, soaking, performing high-temperature solvothermal reaction, cooling to room temperature, cleaning, and drying to obtain a carbon nano composite fiber material; and S4, performing high-temperature calcination on the carbon nano composite fiber material prepared in the step S3 in a nitrogen atmosphere to obtain the tungsten-doped lithium iron phosphate carbon nano composite fiber material. According to the invention, the charge transfer characteristic and conductivity of lithium iron phosphate are improved by doping element tungsten and compounding carbon nanofibers.

The invention relates to the technical field of electrochemical energy storage, and discloses a preparation method of a bismuth carbon nanowire-based planar electrochemical filter capacitor, which comprises the following steps of: (1) adding 2g of polyacrylonitrile and 1g of bismuth nitrate pentahydrate into 20mL of dimethylformamide, and stirring for 12 hours at room temperature in an argon atmosphere to obtain a white transparent viscous spinning precursor solution; (2) filling the spinning precursor solution into an injector with a 20G needle, and taking a roller wrapped by aluminum foil as a receiving device; according to the bismuth carbon nanowire-based planar electrochemical filter capacitor and the preparation method thereof, bismuth nitrate pentahydrate and polyacrylonitrile are co-dissolved in a spinning precursor solution, and after electrostatic spinning and gradient heat treatment, in-situ generation and uniform embedding of bismuth or oxide nanoparticles thereof in a carbon nanofiber matrix are realized; the problems of particle aggregation and weak interface bonding caused by a traditional post-loading method are effectively avoided, and the integrity and cycling stability of the electrode structure are improved.

The invention discloses a method and system for improving formula performance of a brake pad based on reinforcement learning, and relates to the technical field of simulation optimizing.The method comprises the steps that preloading treatment is conducted on carbon nanofibers, and preloading type carbon nanofiber active filler with the electric response release characteristic is prepared; a preloaded carbon nanofiber active filler is adopted to construct a process-performance associated simulation environment for describing the evolution law of the friction layer; setting a process planning intelligent agent and a formula regulation and control intelligent agent to share a reward function in a simulation environment, and forming a multi-target reinforcement learning optimization framework; through interactive training of a multi-target reinforcement learning optimization framework and a simulation environment, outputting optimal process-formula parameters and a trained strategy network; and a carbon nanofiber brake pad sample piece is prepared according to the optimal process-formula parameters. According to the method, the technological parameters and the formula parameters are dynamically and cooperatively adjusted in the decision interaction process, the limitation of split optimization of the technological parameters and the formula parameters in a traditional mode is broken through, and integrated optimization of the technology and the formula is achieved.

The present application relates to the technical field of seawater desalination materials, and particularly relates to a flexible porous carbon nanofiber membrane electrode, a preparation method and application thereof, wherein polyacrylonitrile and a non-metal oxide used as a porogen are used as precursors, and through an electrostatic spinning, carbonization and alkaline solution etching process, a flexible porous carbon nanofiber membrane electrode with a hierarchical porous structure is obtained, the mass ratio of polyacrylonitrile to the non-metal oxide is 3:1-10:1, and the method is a simple, controllable and easy-to-promote method for preparing the flexible porous carbon nanofiber membrane electrode, the prepared self-supporting porous carbon nanofiber material has good mechanical properties and can be freely bent and cut; meanwhile, the material has rich micropores and mesopores, the hierarchical porous structure has a high specific surface area, and thus the desalination performance of the electrode material is obviously improved.

The application belongs to the technical field of electrochemical energy storage, and particularly relates to a composite electrode and a preparation method and application thereof. The composite electrode is obtained by electrostatically combining a polymer and an active material precursor in a specific combination, and then being subjected to post-processing, and comprises a supporting base layer and a porous fiber layer arranged on at least one side of the supporting base layer, the porous fiber layer and the supporting base layer forming an integrated structure; the porous fiber layer comprises carbon nanofibers and active materials dispersed in the carbon nanofibers. The composite electrode structure can realize the integration of supporting, current collecting and electrochemical functions, and has the characteristics of stable structure, small interface resistance, ultrathin thickness, flexibility, high specific surface area, high conductivity and long cycle life.

The application discloses a high-thermal-conductivity silica gel and a preparation method thereof, and belongs to the technical field of high polymer composite materials.The composition comprises the following components in parts by weight: 100 parts of vinyl silicone oil, 10-20 parts of hydrogen-containing silicone oil, 0.1-1 part of a platinum gold catalyst, 1-5 parts of a silane coupling agent, 50-200 parts of functional fillers, and 0.03-0.1 part of an inhibitor.The functional fillers comprise carbon nanofiber / ZnO / MgO composite materials and alumina with a particle size of 10-30 nm treated by the silane coupling agent.The functional fillers endow the high-thermal-conductivity silica gel with excellent thermal conductivity, flame retardation and electromagnetic wave absorption performance, and the high-thermal-conductivity silica gel can be widely applied to thermal management and electromagnetic protection in the fields of new energy vehicles, aerospace and the like.

The present invention generally relates to the metal batteries. The present invention discloses sodium-plated host material comprising sodium-plated or bonded with metal modified electrospun carbon nanofiber, wherein the metal is selected from tin (Sn), silicon (Si), germanium (Ge), zinc (Zn), cobalt (Co) and lead (Pb). The present invention also discloses a process for preparation of sodium-plated host material and a full cell comprising the sodium- plated host material.

The invention discloses a composite solid electrolyte membrane, a preparation method thereof and a solid-state battery. The composite solid-state electrolyte membrane comprises a first solid-state polymer electrolyte layer, a second solid-state polymer electrolyte layer located on the first solid-state polymer electrolyte layer and a third solid-state polymer electrolyte layer located on the second solid-state polymer electrolyte layer, wherein the first solid-state polymer electrolyte layer, the second solid-state polymer electrolyte layer and the third solid-state polymer electrolyte layer all contain carbon nanofibers; and the content of carbon nanofibers in the first solid polymer electrolyte layer and the third solid polymer electrolyte layer is higher than the content of carbon nanofibers in the second solid polymer electrolyte layer. The composite solid electrolyte membrane with a multilayer structure is prepared by introducing a high-strength carbon nanofiber network structure, so that the tensile strength and impact resistance of the electrolyte membrane can be improved, and the structural stability of the battery in the cycle process can be ensured.