67 results about "Carbon fiber electrode" patented technology

The invention discloses a self-driven bio-electro-Fenton sewage treatment method based on granular sludge electroactivity domestication. The sewage treatment method comprises the following steps: firstly, inoculating anaerobic granular sludge into an anode chamber of a microbial fuel cell, fixing a clustered carbon fiber electrode in a biological anode chamber as an electrode collector, taking a cathode as an oxygen reduction cathode, and performing electrochemical enrichment to obtain electroactive granular sludge; then, preparing an iron-cobalt diatomic catalyst from the nitrogen-doped graphene oxide, cobalt phthalocyanine and iron phthalocyanine; and finally, adding the iron-cobalt diatomic catalyst into the electroactive granular sludge to form a hybrid structure, controlling dissolved oxygen in a reaction system, and degrading organic pollutants by adopting an SBR (sequencing batch reactor). The biological electro-Fenton technology has a better effect of removing refractory organic pollutants, and compared with a traditional electro-Fenton method, the self-Fenton technology can achieve the activity of molecular oxygen without external electric energy input.

This application relates to the field of biomedical technologies, and provides a data processing method and related devices. The method includes: collecting first data and second data from a patch clamp electrophysiological system, where the first data is data generated after a configured carbon fiber electrode applies multiple scanning voltages to a cell, and the second data is data generated after a configured stimulating electrode applies an electrical stimulation to the cell and then the configured carbon fiber electrode applies multiple scanning voltages to the cell; extracting target current data from the first data, and generating a first curve based on the target current data and the second data; sampling a single scanning voltage to obtain target sampling points, and generating a corresponding second curve based on the initial current data and the sampling time of the multiple target sampling points in the sampled first data or the sampled second data, so as to be able to obtain the original current and voltage data and convert the original data into an intuitive and effective curve.

The invention discloses a preparation method and application of an activated carbon fiber electrode material modified through nitrogen plasma chemical vapor deposition and acidification, and the preparation method of the activated carbon fiber electrode material comprises the following steps: carrying out cleaning pretreatment on flaky activated carbon fiber; performing normal-temperature nitrogen plasma chemical vapor deposition on the pretreated active carbon fiber to obtain a first modified precursor active carbon fiber N-ACF, immersing the N-ACF in nitric acid, and performing heating acidification treatment to obtain a second modified active carbon fiber N-Acid-ACF, thereby completing the preparation. The electrode material disclosed by the invention is prepared by adopting a green and environment-friendly method, is simple and efficient, effectively improves the electrical generation efficiency of hydrogen peroxide, has ultrahigh degradation performance on phenol, and also has good stability. In addition, polar plates are not consumed in the process, equipment is simple, operation and management are convenient, and wide popularization space and use value are achieved.

The invention belongs to the technical field of battery materials, and provides a sulfide solid electrolyte composite material, a structural energy storage integrated lithium ion battery and a preparation method thereof. The sulfide solid electrolyte composite material comprises an inner core and a coating layer, the surface of the inner core is coated with the coating layer, the inner core is a sulfide solid electrolyte, and the coating layer is an oxygen-containing lithium compound; the species of oxygen-containing lithium compounds are defined. The sulfide solid electrolyte is coated with at least two oxygen-containing lithium compounds, and the oxygen-containing lithium compounds are compatible with the sulfide solid electrolyte in the heat treatment process, so that the air stability and the oxidation resistance of the electrolyte are remarkably improved; a solution method coating and calcining process is adopted, so that a coating layer is uniformly dispersed, and the stability of the composite material is improved; the sulfide solid electrolyte composite material, a carbon fiber electrode and a glass fiber woven cloth diaphragm are assembled into the structural energy storage integrated lithium ion battery, the lithium ion battery has excellent specific capacity, cycling stability and rate capability, and the service life is prolonged.

The invention discloses a three-dimensional porous carbon encapsulated V2O5 carbon fiber electrode constructed by in-situ growth and a preparation method and application thereof, belongs to the technical field of aluminum ion battery positive electrode materials, and aims to solve the problems that the intercalation and deintercalation dynamics of AlCl4 in a polyacrylonitrile (Pan)-based carbon fiber is blocked due to disordered graphite structure, and the performance of the Pan-based carbon fiber is influenced. And the material cannot be used as an effective electrode material to be applied to an aluminum ion battery system. According to the preparation method, an in-situ growth technology is adopted, a three-dimensional porous carbon substrate is grown on the surface of carbon fiber, then an orthorhombic system vanadium pentoxide (V2O5) nano material which has high theoretical specific capacity and can realize large-current charging and discharging is packaged in the three-dimensional porous carbon substrate, and the V2O5-based carbon fiber electrode is prepared. According to the electrode, the electrostatic interaction between Al < 3 + > ions and crystal lattices is effectively relieved, the structural advantages of the carbon fibers and the energy storage performance of V2O5 are fully combined, the energy storage effect of the aluminum ion battery is remarkably improved, and a new effective scheme is provided for development of aluminum ion battery electrode materials.

The invention discloses an exosome separation device, a preparation method thereof and an exosome separation and purification method in the technical field of biomedical detection. The device comprises a micro-fluidic chip and an electrochemical workstation electrically connected with the micro-fluidic chip; the micro-fluidic chip comprises a substrate defining a fluid channel and a three-electrode assembly embedded in the inner wall of the fluid channel. The substrate is made of polydimethylsiloxane, and electrodes in the three-electrode assembly are carbon fiber electrodes modified with a zirconium-based metal organic framework. The Zr-MOF is modified on the surface of the electrode, the exosome is captured by the affinity of the Zr-MOF, elution and collection are realized by combining an electrochemical method, and the method has the advantages of high efficiency, rapidness, easiness in control and the like; the immunoaffinity of a specific antibody, the phosphoric acid affinity of a Zr-MOF modified electrode, an amphiphilic strategy and an electrochemical method are combined, so that the exosome separation specificity and separation efficiency are remarkably improved.

A probe for insertion into a brain tissue includes a tubular body having an inner lumen and at least two carbon fiber electrode threads (CFETs) extending through the inner lumen of the tubular body. Each CFET includes a carbon fiber having a proximal portion and a distal portion. The proximal portion of the carbon fiber is coated with a polymer. The distal portion of the carbon fiber is exposed to allow direct contact with the brain tissue. The carbon fiber of each CFET has an aspect ratio between 100 and 1500.

The invention belongs to the technical field of electrochemical sensing, and discloses a preparation method and application of BiOCl and a bismuth membrane electrode. The preparation method of BiOCl comprises the following steps: heating and dissolving bismuth nitrate into concentrated nitric acid, then adding bismuth trioxide into the solution, then adding concentrated hydrochloric acid, fully stirring, standing and cooling to room temperature to obtain a solution A; preparing a 15-25 wt% sodium hydroxide solution as a solution B; the preparation method comprises the following steps: adding water into a reaction container, heating to 65-85 DEG C, then adding concentrated hydrochloric acid, then adding a non-sulfur non-phosphorus surfactant while stirring, stirring until the solution is clear, simultaneously dropwise adding the solution A and the solution B into the reaction container, reacting for 15-15.5 hours, then dropwise adding the solution B again, adjusting the pH value of the solution to 9-11, cooling to room temperature, and drying to obtain the target product BiOCl. The bismuth membrane electrode is obtained by modifying a carbon fiber electrode with BiOCl. The bismuth membrane electrode can be used for detecting one or two of Pb < 2 + > content and Cd < 2 + > content in a water body / blood, and can also be used for integrating a portable heavy metal detection device.

This invention belongs to the field of biosensing technology, specifically relating to a modified carbon fiber electrode for detecting dopamine, its preparation method, and its application. The modified carbon fiber electrode comprises a carbon fiber electrode onto which gold-platinum bimetallic nanoparticles and polydopamine are sequentially modified. The preparation method specifically includes: firstly, modifying the surface of activated carbon fiber filaments with chloroauric acid and sodium citrate to obtain Au@CF; then, modifying the Au@CF surface with ascorbic acid and chloroplatinic acid to obtain platinum nanoparticles, obtaining Au / Pt@CF; finally, immersing the Au / Pt@CF in a dopamine solution to coat the Au / Pt@CF surface with polydopamine, obtaining PDA@Au / Pt@CF. This electrode has advantages such as high sensitivity, low detection limit, strong anti-interference ability, good biocompatibility, and high mechanical stability, making it suitable for dynamic monitoring of dopamine in the living brain.

The invention discloses a large-interlayer-spacing LDH carbon fiber electrode material and an alkaline zinc-based flow battery thereof, and belongs to the field of zinc-based flow batteries. The preparation method disclosed by the invention is simple and efficient, and the prepared EDTA-coated LDH has a uniform layered structure with relatively large interlayer spacing and good chemical stability. According to the invention, the diffusion effect of Zn (OH) 4 < 2-> is enhanced, so that Zn (OH) 4 < 2-> can be rapidly conducted in the electrode material, and the effect of reducing a reaction energy barrier can also be achieved in the OH dissociation process. The method is applied to the zinc-based flow battery, the ion diffusivity can be obviously improved, the Zn deposition is more uniform, the concentration polarization of the battery is reduced, and the service life of the battery is effectively prolonged.

The invention discloses a vanadium oxide / carbon-based active material carbon fiber structure supercapacitor and a preparation method thereof, and the preparation method comprises the steps: carrying out the mixing and compounding of vanadium oxide and a carbon-based active material, preparing an active material, loading the active material on a pretreated carbon fiber material through a curtain coating technology, and preparing an electrode, separating the two carbon fiber electrodes by using glass fiber as a diaphragm; and preparing a solid epoxy resin electrolyte, enabling the solid epoxy resin electrolyte to fully infiltrate the carbon fiber electrode and the glass fiber diaphragm, and carrying out hot press molding through a hot press to prepare the supercapacitor with the vanadium oxide / carbon-based active material carbon fiber structure. The supercapacitor provided by the invention has relatively high specific capacitance, energy density and cycle life, and the preparation method of the supercapacitor is simple, convenient, easy to use, low in cost and suitable for large-scale production.

The invention discloses a structural supercapacitor based on 3D printing and a preparation method thereof, and belongs to the field of structural supercapacitors. The super capacitor of the structure is composed of two carbon fiber electrodes, specific structures with tenon and mortise microarrays are formed on the surfaces of the two carbon fiber electrodes in a 3D printing mode, after the two carbon fiber electrodes are combined to form a mortise and tenon structure, in-plane slippage does not occur, a cavity is formed between the two carbon fiber electrodes, and the two carbon fiber electrodes are arranged in the cavity. And polymer gel electrolyte is poured into the cavity. The super capacitor with the structure prepared by the method has the advantages of a device prepared by an existing preparation method, ion transmission channels can be uniformly dispersed and distributed, the transmission channels are straight, in addition, compared with a traditional preparation method, diaphragms such as glass fibers do not need to be added between two electrodes, and the preparation method is simple and convenient. Therefore, the ion transmission is smoother, and the mechanical property and the electrochemical property of the device can be fully exerted.

An electrical appliance having an electrostatic dust collecting device using carbon fiber includes: a main body including an inlet; a charging device arranged on the main body at an edge of the inlet and configured to charge pollutants in the air; an air moving device arranged inside the main body and configured to suck in air containing pollutants and discharge the air to the outside; and a dust collecting device arranged in an air passage and configured to collect pollutants charged by the charging device from the air. The charging device includes: a plurality of carbon fiber electrodes arranged toward the inlet and configured to generate electrons to charge pollutants; a printed circuit board on which the plurality of carbon fiber electrodes are arranged; and a ground electrode arranged adjacent to the printed circuit board without facing the plurality of carbon fiber electrodes.

The invention belongs to the field of flow batteries, and particularly relates to an alkaline zinc-iron flow battery. The alkaline zinc-iron flow battery comprises an ion conduction membrane unit, an electrolyte unit and an electrode unit, the ion conduction membrane unit is a porous ion conduction membrane with negative charge, and can quickly conduct positively charged carriers and repel negatively charged active substances; a positive electrode of the electrolyte unit is a ferricyanide couple, a negative electrode of the electrolyte unit is a zinc couple, a positive electrode supporting electrolyte is a lithium-based mixed alkali metal solution, and a negative electrode supporting electrolyte is an alkali metal solution; the positive electrode and the negative electrode of the electrode unit are both porous carbon nanosheet array modified carbon fiber electrodes, so that the concentration polarization of a positive electrode active material can be reduced, and the carbon fiber electrodes can also be used as active sites for zinc deposition of the negative electrode. The alkaline zinc-iron flow battery disclosed by the invention is excellent in performance and shows a very good application prospect.

The invention belongs to the field of electrochemical sensors, and discloses an anti-pollution microelectrode for identifying pseudomonas aeruginosa strains and detecting phenazine spatial distribution of the pseudomonas aeruginosa strains as well as a preparation method and application of the anti-pollution microelectrode. The anti-pollution microelectrode comprises a carbon fiber electrode base body, a Fe-HHTP-PDA composite substrate layer and a Fe-HHTP-SBMA anti-pollution layer. The two-dimensional conductive metal organic framework material Fe-HHTP is doped in the anti-pollution layer based on the PDA substrate and the SBMA, so that the problem of signal attenuation caused by insulativity of the anti-pollution layer is successfully solved; by virtue of a two-dimensional ordered structure and a mixed valence iron node, the Fe-HHTP not only serves as a conductive bridge to maintain electron transmission, but also specifically catalyzes an oxidation-reduction reaction of phenazine substances, so that the anti-pollution function is realized, and meanwhile, the detection sensitivity is maintained and even improved. The preparation method is simple and convenient to operate and controllable in modification, and does not need a traditional high-pressure and high-temperature process.

The invention discloses a 3D printing carbon fiber electrode multistage spiral structure supercapacitor and a preparation method thereof, and the method employs continuous carbon fibers as a flexible substrate and a carbon-based electrode active material as an active material to prepare a braided electrode. The whole electrode assembly is coated with 1-ethyl-3-methylimidazole chloride / chitosan / hydroxyethyl methylacrylate electrolyte, and then the woven electrode and silica gel are extruded out through a coaxial nozzle by a direct writing technology, so that in-situ packaging of the woven electrode is realized. Experiments prove that the flexible solid supercapacitor in a free form can be produced, and the obtained supercapacitor has enhanced tensile strength, excellent long-term cycling stability, low diffusion resistance and consistent performance in various bending states, and paves a way for the next generation of wearable electronic products.

The invention discloses a self-supporting polymer-based carbon fiber electrode and a preparation method thereof and a dual-carbon battery, the self-supporting polymer-based carbon fiber electrode is formed by blending and carbonizing a polymer material and a carbon-based material, and the preparation method comprises the following steps: (1) adding the polymer material and the carbon-based material into an organic solvent, reacting for 1-5 days at 20-80 DEG C, and heating and stirring to obtain a spinning solution; and (2) performing electrostatic spinning on the spinning solution, pre-oxidizing in air, and carbonizing at the temperature of 400-700 DEG C to obtain the self-supporting polymer-based carbon fiber electrode. According to the invention, the sp3 / sp2 structure is adjusted into the carbon layer at a certain hybridization rate, and good balance between lithium ion conduction and electron conduction is realized, so that the carbon electrode with excellent reaction kinetics is obtained. When the polymer anode and the carbon-based cathode are paired, the high-voltage dual-carbon battery has excellent rate capability and stable cycle durability, and the cycle durability is greatly prolonged. The preparation process is simple, and the electrochemical performance of a soft package battery prepared from the obtained dual-carbon battery is not affected in the deformation processes of bending, folding and the like.

The invention discloses a method for industrially producing nano-metal particles on a large scale, which comprises the following steps of: growing nano-metal particles on a graphene composite carbon fiber electrode in situ by adopting a direct current electroplating mode, and enabling the nano-metal particles deposited at a vertical graphene edge to fall off and sink by utilizing an ultrasonic vibration mode. The size of the metal nano-particles is controlled, the metal nano-particles fall off the surface of the electrode in time, and therefore continuous and large-batch production is achieved. The method for obtaining the nano-metal particles is carried out in a normal-temperature aqueous solution, the process is simple, energy is saved, consumption is low, and large-scale preparation of the metal nano-particles can be achieved; and no toxic or harmful gas is generated in the production process, so that the method is environment-friendly.

The objective is to provide a carbon fiber electrode material that can form a uniform and thin MPL (microporous layer) on its surface, and a method for manufacturing the same. [Solution] The carbon fiber electrode material comprises a carbon fiber fabric formed from warp and weft threads, and a web made of multiple carbon fibers, wherein the web is positioned on one side of the carbon fiber fabric, and at least one end of the carbon fibers of the web is inserted into the weave of the carbon fiber fabric, so that the carbon fibers of the carbon fiber fabric and the carbon fibers of the web are attached to each other. The length of the carbon fibers of the web may be in the range of 20 mm to 150 mm. The thickness of the carbon fibers of the web may also be in the range of 5 μm to 10 μm.

To provide an electrosurgical instrument by which extensive surface areas of biological tissue can be coagulated quickly and uniformly on the surface.SOLUTION: In a surgical instrument 15 according to the present invention for the treatment of a tissue surface 14, particularly for coagulation or ablation of the tissue surface, an electrode 23 composed of carbon fibers or at least containing carbon fibers functions to conduct current to the tissue surface. Anisotropy of the electrical conductivity of the carbon fibers or of the formed electrode enables realization of a large-area and uniform current distribution. This applies in the case of direct-contact coagulation as well as in the case of mixed coagulation in plasma generation with the electrode at least partially in contact with the tissue surface. Due to the configuration of the electrode surface by the carbon fibers and particularly their high thermal conductivity, sticking of the electrode to the tissue surface is effectively avoided.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of food analysis and detection, and particularly discloses a method for rapidly detecting tartaric acid in wine based on a molecularly imprinted polymer (MIP) modified carbon fiber electrode. According to the method, a tartaric acid molecularly imprinted polymer layer is constructed on the surface of a carbon fiber electrode by adopting an electrochemical polymerization technology, and high-sensitivity and high-selectivity detection of tartaric acid is realized in a potential range of-0.5 to + 0.6 V (vs.Ag / AgCl) in combination with a differential pulse voltammetry (DPV). The modified electrode has excellent conductivity and specific recognition capability, the detection limit is as low as 0.05 [mu] mol / L, and the linear range is 1-800 [mu] mol / L. The method is simple and convenient to operate, the single detection only needs 20 seconds, the relative standard deviation is less than 3.5%, the recovery rate reaches 95-102%, the method can be directly applied to stock solution detection of complex wine matrixes (such as dry red wine, dry white wine and sweet wine), complex pretreatment is not needed, and an efficient and reliable analysis means is provided for wine brewing process monitoring and quality evaluation.

The invention discloses an aluminum ion structure energy storage composite material based on a pure carbon fiber electrode and a preparation method thereof, and belongs to the technical field of aluminum ion structure energy storage. The invention provides an aluminum ion structure energy storage composite material configuration based on an asphalt-based carbon fiber structure electrode material, and the limitation that a carbon fiber electrode must be modified in the previous preparation of an aluminum ion structure energy storage composite material is made up. The aluminum ion structure energy storage composite material prepared from the pitch-based carbon fiber has the advantages of high specific capacity, good cycle performance, high capacity retention rate and the like. The technology has the advantages of being simple in process, low in cost, high in assembly efficiency and the like, and is suitable for large-scale production of the aluminum ion structure energy storage composite material.

The invention discloses a vanadium-boron-doped carbon fiber electrode, a preparation method thereof and an all-vanadium redox flow battery, and the preparation method of the vanadium-boron-doped carbon fiber electrode comprises the following steps: taking a proper amount of nitrogen source, boron source, vanadium salt and organic chelate as preparation raw materials, dissolving in an ethanol aqueous solution, stirring and dispersing uniformly, and evaporating and drying to obtain a solid mixture; performing high-temperature pyrolysis treatment on the solid mixture, and performing ultrasonic dispersion in deionized water to obtain a vanadium-boron doped carbon nanotube; taking the vanadium-boron-doped carbon nanotube and polyacrylonitrile as matrixes, and adopting an electrostatic spinning method to obtain a nanofiber membrane; and performing pyrolysis treatment on the nanofiber membrane to obtain the vanadium-boron-doped carbon fiber electrode. According to the invention, the doping of the organic complex greatly improves the hydrophilicity of the electrode and the adsorption capacity to vanadium ions, and the doping of boron can form a V-B-C active site, and the V-B-C active site and the V-N-C active site form a synergistic effect, so that the electrochemical activity is improved.

A carbon fiber implantable probe, a method of manufacturing the carbon implantable probe, and a method of implanting the probe in an implantation site, such as a nerve. The carbon fiber implantable probe includes a flexible probe body, a carbon fiber microarray (CFMA) comprising one or more carbon fiber electrodes at least partially embedded in the flexible probe body, and a signal conductor connected to the one or more carbon fiber electrodes of the CFMA. In one example, the CFMA includes carbon fiber electrodes having conductive carbon cores partially surrounded by an insulative coating. The combination of the CFMA with the flexible probe body, made of silicone rubber for example, can improve implantation processes.

The invention discloses a carbon fiber structure electrode interface performance sample preparation and testing method, and belongs to the technical field of structure energy storage composite material testing. Surface modified carbon fibers are adopted as structural electrodes, electrode fiber monofilaments are stripped from the carbon fiber electrodes under a magnifying lens, the two ends of the electrode fiber monofilaments are fixed to the two sides of a U-shaped carrier respectively, and the middle portions of the electrode fiber monofilaments are suspended in the middle of the carrier and are in a straightened state; mixing resin, a pore forming agent and a curing agent, and uniformly stirring to prepare a structural electrode resin solution; the method comprises the following steps: dipping a structural electrode resin solution by using an injector, dripping the structural electrode resin solution on an electrode fiber monofilament, dripping a plurality of micro-droplets on one fiber, curing to obtain a test sample, and testing the interface performance of the carbon fiber structural electrode by using a tension testing machine and a super field depth microscope to accurately obtain the interface strength of the carbon fiber structural electrode. And the microstructure change rule of the surface of the carbon fiber electrode in the interface damage process of the carbon fiber structure electrode can be obtained.

The invention discloses a method for preparing and testing a carbon fiber structure electrode interface performance sample, which comprises the following steps of: taking surface modified carbon fiber as a structure electrode, stripping an electrode fiber monofilament from the carbon fiber electrode under a magnifying lens, and respectively fixing two ends of the electrode fiber monofilament on two sides of a concave carrier; enabling the middle part of the electrode fiber monofilament to be suspended in the middle of the carrier and to be in a straightened state, mixing resin, a pore forming agent and a curing agent, and uniformly stirring to prepare a structural electrode resin solution; the method comprises the following steps: dipping a structural electrode resin solution with an injector, dripping the structural electrode resin solution on an electrode fiber monofilament, curing in a low-oxygen pore-forming agent atmosphere, performing ultrasonic post-treatment in a solvent atmosphere, infiltrating electrolyte to obtain a test sample, and testing the interface performance of the carbon fiber structural electrode by adopting a tension testing machine and an ultra-field-depth microscope. The interface strength of the carbon fiber structure electrode can be accurately obtained, and the surface microstructure change rule of the carbon fiber electrode in the interface damage process of the carbon fiber structure electrode can be obtained.

The invention discloses a device and a method for carbon fiber electrode active material coating and CVD (chemical vapor deposition) growth, and belongs to the field of carbon fiber electrodes. The device comprises an array coating machine and a CVD gas distribution system. The array coating machine is mainly used for preparing the positive electrode of the lithium battery, and the CVD growth process is mainly used for preparing the negative electrode of the lithium battery. The array coating machine is two-coordinate numerical control equipment, and a piezoelectric valve is controlled by writing a control program to quantitatively coat a target material. And the surface of the carbon fiber can be coated in an array shape at the minimum interval of 3mm, so that after the carbon fiber has electrode activity, a composite material prepared from the carbon fiber still has relatively good interlayer mechanical property. The gas distribution system is of a cuboid cabinet structure, trundles are installed below the gas distribution system to facilitate movement, and a main control panel is arranged right in front of the device. The left side surface is a gas inlet, the right side surface is a gas outlet, the back surface of the device is a device power supply interface, and the upper surface of the device is a device working state indicator and is used for carrying out A-path or B-path atmosphere supply control on different CVD growth equipment.

The application discloses a kind of carbon fiber electrode materials of hierarchical porous carbon load and its preparation method and its application in supercapacitor.The preparation method is: first, activated carbon fiber CFO is prepared by ion beam treatment method, then uniform and viscous egg white and hierarchical porous carbon containing slurry is uniformly coated on the surface of activated carbon fiber CFO, and the hierarchical porous carbon modified carbon fiber material is obtained by drying, calcination carbonization, and the carbon fiber electrode material of hierarchical porous carbon load is obtained.The method has the advantages of simple process, high efficiency, strong structure and performance controllability.Based on the adhesion of egg white, hierarchical porous carbon with good porosity and large specific surface area is loaded on the surface of carbon fiber, and during calcination carbonization, the hierarchical porous carbon is sintered with carbon fiber into one body by rearranging the carbon chain of egg white, which improves the specific surface area and porosity of carbon fiber, and improves the electrochemical performance of carbon fiber electrode.

The invention belongs to the technical field of battery materials, and particularly discloses a pretreatment process of PAN-based carbon fibers and application of the PAN-based carbon fibers in preparation of a high-activity flow battery electrode material. The method comprises the following steps: soaking a polyacrylonitrile (PAN) precursor in an aqueous solution containing a pretreating agent such as potassium dichromate, and carrying out chemical pretreatment, so that the surface of the PAN fiber is subjected to primary structural transformation; and respectively carrying out pre-oxidation and carbonization treatment on the obtained material to obtain the PAN-based carbon fiber electrode material with the catalyst on the surface. When the obtained carbon fiber material is used as an electrode material of the all-vanadium redox flow battery, the electrode reaction kinetics of the positive electrode and the negative electrode of the battery can be effectively improved, and the energy conversion efficiency and the rate capability of the battery are improved. The method is easy to operate, compared with a traditional electrode preparation technology, energy consumption is low, the process is simple, large-scale production is easy to achieve, and the method has good application prospects in the field of vanadium battery electrode materials.

The invention discloses pore-adjustable carbon fiber paper for a supercapacitor electrode and a preparation method of the pore-adjustable carbon fiber paper, and belongs to the technical field of composite materials. Waste lyocell fibers are subjected to PFI pulping and then uniformly mixed and dispersed with coniferous fibers, a material precursor is prepared by using a wet non-woven technology and then impregnated with a phosphoric acid solution, then two-dimensional fiber paper is obtained after low-temperature drying and stepped heating carbonization are conducted in sequence, then the material is placed in deionized water to be subjected to ultrasonic cleaning, and the two-dimensional fiber paper is obtained. The self-supporting porous paper-based carbon fiber electrode material is obtained. The self-supporting porous carbon fiber paper prepared by the method has the characteristics of self-supporting performance, high specific surface area, high specific capacitance capacity and the like, and has excellent electrochemical performance when being used as an independent electrode of a supercapacitor.