539 results about "Carbon paper" patented technology

The invention belongs to the technical field of fuel cells, and particularly relates to carbon paper for a gas diffusion layer with a water-gas management function and a preparation method of the carbon paper. The carbon paper for the gas diffusion layer comprises at least three alternately stacked carbon layer structures, odd layers are macroporous carbon layers, and the macroporous carbon layers are formed by dipping carbon fiber base paper in a mixed solution of resin and a conductive material and drying the carbon fiber base paper; the even-numbered layers are small-hole carbon layers, and the small-hole carbon layers comprise resin and conductive materials and are coated on the surfaces of the odd-numbered layers; the odd-numbered layers and the even-numbered layers are compounded through a hot-pressing process to form a composite material; the composite material is subjected to high-temperature heat treatment to form a carbon paper A conductive network is formed in the carbon paper, the carbon paper with higher conductivity is prepared, part of the conductive material is filled in the carbon paper to build a microporous structure, the low-gram-weight base paper forms a macroporous structure, and the conductive material and the resin are mixed to form a microporous structure, so that the water and gas management capability is favorably improved.

The invention belongs to the technical field of electrochemistry, and particularly relates to a gas diffusion electrode for efficiently producing hydrogen peroxide in situ and a preparation method thereof. The gas diffusion electrode is composed of a carbon paper substrate, a carbon black gas diffusion layer and a carbon nitride modified carbon nanotube catalyst layer. The preparation method of the gas diffusion cathode comprises the following steps: mixing a carbon nanotube, g-C3N4, isopropanol, 60wt% of PTFE emulsion and water to prepare a mixed solution, and loading a compound of the carbon nanotube and g-C3N4 on one side of a carbon paper substrate by adopting an ultrasonic impregnation mode to prepare a catalyst layer; the other side of the carbon paper substrate is impregnated with carbon black and PTFE emulsion to prepare a diffusion layer, and the diffusion layer is uniformly coated, dried and annealed to prepare the gas diffusion cathode. The gas diffusion electrode is used for efficiently producing hydrogen peroxide through in-situ electrocatalysis, the yield of hydrogen peroxide can reach 1050 mg / L after 1.5 h, the current efficiency is 76%, and the energy consumption is 5.56 KWh / Kg.

The invention discloses a preparation process of a highly graphitized fuel cell microporous layer with a graded pore structure and gradient wetting performance. The preparation method comprises the following steps: firstly, uniformly dispersing carbon black particles in a polyvinylpyrrolidone ethanol solution to prepare a homogeneous viscous spinning solution; then preparing a fiber membrane with a hierarchical pore structure on a plane structure through an electrostatic spinning process, and constructing an excellent water and gas transmission channel; partially entangled fibers are formed in the thickness direction; after drying, stabilization and pre-oxidation are carried out under carbon paper clamping and loading, and fibers are uniformly shrunk and refined; inducing the pre-oxidized fiber membrane to generate highly graphitized transformation under the clamping of a high-purity graphite flake; the preparation method comprises the following steps: taking polytetrafluoroethylene as a raw material, soaking the polytetrafluoroethylene in polytetrafluoroethylene turbid liquid under horizontal placement, drying and melting to enable the polytetrafluoroethylene to be distributed in a gradient manner in the vertical direction, so that good water and gas management performance under a full-humidity working condition (0-100% relative humidity) is realized; and the overall performance of the fuel cell is obviously improved.

The invention discloses a Cl-Bi carbon dioxide reduction electrocatalyst, a preparation method thereof and application of the Cl-Bi carbon dioxide reduction electrocatalyst in preparation of formic acid through catalytic reduction of carbon dioxide, and belongs to the technical field of electrocatalyst materials. The preparation method comprises the following steps: preparing a sodium chloride solution, adjusting the pH value with acid, adding Bi2O3, carrying out a stirring reaction, washing a reactant, and drying to obtain BiOCl; the preparation method comprises the following steps: dispersing BiOCl, carbon black and naphthol in ethanol, carrying out ultrasonic treatment to obtain ink, dripping the ink onto hydrophobic carbon paper, drying, and reducing under negative voltage to obtain the Cl-Bi carbon dioxide reduction electrocatalyst. The prepared Cl-Bi carbon dioxide reduction electrocatalyst is simple in preparation method, free of pollution, rich in raw material and low in price, and the Cl-Bi carbon dioxide reduction electrocatalyst has high formic acid production selectivity, high formic acid yield and excellent stability.

The invention discloses a thermally stable gas diffusion layer material and a fuel cell, and relates to the field of fuel cells. When the heat-stable gas diffusion layer material is prepared, short-cut polyacrylonitrile carbon fibers are subjected to papermaking and then cured, and 3-aminothiophene is oxidized and grafted to prepare a modified carbon paper base layer; the preparation method comprises the following steps: carrying out a reaction on a single-layer graphene oxide nanosheet, 6-amino-2-mercaptobenzothiazole and 3-aminoethyl thiophene to prepare a modified single-layer graphene oxide nanosheet; the preparation method comprises the following steps: reacting polyvinylidene fluoride powder, 3-allyl thiophene and single-ended vinyl silicone oil to prepare a modified polyvinylidene fluoride emulsion; and uniformly mixing the modified single-layer graphene oxide nanosheet, a modified polyvinylidene fluoride emulsion and isopropanol, spraying on the modified carbon paper base layer, and reacting with 3, 4-ethylenedioxythiophene to prepare the thermally stable gas diffusion layer material. The thermally stable gas diffusion layer material prepared by the method has excellent porosity, thermal stability, conductivity and corrosion resistance.

The invention discloses a full-automatic multi-station H-shaped flowing electrolytic tank experiment system and a control method thereof, and relates to the technical field of electrolytic tank experiments. Comprising an experiment table top, a mechanical arm is arranged on the top of the experiment table top, a carbon paper module frame is arranged on the top of the experiment table top, a TIP head box frame is arranged on the side, close to the carbon paper module frame, of the top of the carbon paper module frame, a sample bottle frame is arranged on the top of the experiment table top, and a penicillin bottle exchange frame is arranged on the top of the experiment table top. And five groups of H-shaped flowing electrolytic tanks are arranged at the top of the experiment table top and close to one side of the penicillin bottle exchange rack at equal intervals. According to the full-automatic multi-station H-type flowing electrolytic cell experiment system, through collaborative design of the mechanical arm, the quick-change clamp and multiple stations, full-process automation of catalyst coating, electrode assembling, electrolyte circulation, data acquisition and cleaning and sample reserving is achieved, parallel operation of multiple sets of experiments is supported, and the experiment efficiency is improved.

The invention belongs to the field of water electrolysis hydrogen production, and particularly relates to a membrane electrode and a blade coating preparation method and application thereof. The blade coating preparation method provided by the invention comprises the following steps: a) pressing a blade coating substrate to a certain thickness to obtain a pressed substrate; in the step a), the blade coating substrate is nickel foam, nickel felt or carbon paper; b) blade-coating the surface of the pressed substrate with catalyst slurry by using a blade coating machine, drying and hot-pressing to obtain a membrane electrode; in the step b), the ratio of the total mass of the catalyst powder and the binder in the catalyst slurry to the mass of the solvent is 1: (2-4); the distance between a scraper of the blade coater and the pressed substrate is 10-200 [mu] m; the blade coating speed ranges from 1 mm / s to 30 mm / s; the drying temperature is 50 to 90 DEG C. The membrane electrode is prepared by adopting a blade coating process under specific conditions, and the method has the advantages of good coating uniformity of the catalyst layer, high production efficiency and the like, and is particularly suitable for large-scale production of large-area membrane electrodes.

The invention discloses a double transition metal doped RuO2 acidic OER electrocatalyst and a preparation method and application thereof, relates to an OER electrocatalyst and a preparation method and application thereof, and aims to solve the technical problems of high overpotential and poor stability of the existing transition metal doped RuO2 catalyst.The catalyst is (M1) x (M2) yRuO2, M1 is Zr or Ti, and M2 is a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst. M2 is Mo, Nb or Tc; x is equal to 0.02 to 0.1, and y is equal to 0.02 to 0.1. The preparation method comprises the following steps: adding ruthenium salt, M1 salt, M2 salt and ethanol into water, putting the obtained mixed solution into a homogeneous reactor for hydrothermal reaction, washing and drying the product, and annealing. According to the present invention, the prepared electrode is loaded on carbon paper to prepare the electrode for acidic OER electro-catalysis, has the overpotential of 224 mV under the current density of 10 mAcm <-2 >, has excellent stability within 200 h, and can be used in the field of water electrolysis hydrogen production.

The invention relates to the field of fuel cells, and particularly discloses a gas diffusion layer, a preparation method thereof and a proton exchange membrane fuel cell applying the gas diffusion layer, and the preparation method of the gas diffusion layer comprises the following steps: preparing porous substrate layer carbon paper; performing hydrophobic treatment on the porous substrate layer carbon paper to obtain hydrophobic carbon paper; a hydrophobic agent and water are mixed to obtain hydrophobic slurry A, conductive powder, a surfactant, a binder and an organic solvent are mixed and dispersed to obtain conductive powder slurry B, the hydrophobic slurry A and the conductive powder slurry B are mixed to form spraying slurry C, the spraying slurry C is sprayed on hydrophobic carbon paper while being stirred, drying and curing are conducted after spraying, and a microporous layer is formed. A gas diffusion layer is obtained; the invention further discloses the gas diffusion layer prepared by adopting the method and the proton exchange membrane fuel cell applying the gas diffusion layer. The application has the characteristics of solving the problems of dispersion uniformity of the conductive powder in the slurry and sedimentation in the coating process, improving the quality of the microporous layer and further improving the performance of the fuel cell.

The invention discloses a green preparation method of carbon fiber paper for a gas diffusion layer of a fuel cell. The green preparation method comprises the following steps: placing carbon fiber body paper with certain gram weight in an overlapping manner according to a preset total gram; impregnating the carbon fiber raw paper in a mixed resin aqueous solution, taking out the carbon fiber raw paper, and precuring to obtain carbon fiber preformed paper; performing hot-pressing curing treatment on the carbon fiber preformed paper at high temperature to obtain carbon fiber hot-pressed paper; and carbonizing and graphitizing the carbon fiber hot-pressed paper at a preset temperature in a protective atmosphere for a preset time to obtain the carbon fiber paper. According to the green preparation method provided by the invention, water is taken as a solvent, water-soluble phenolic resin which is more environment-friendly than alcohol-soluble phenolic resin is taken as a resin matrix, and the performance of the carbon paper is improved by adding different types of water-soluble resin. The invention further discloses the corresponding carbon fiber paper.

The invention discloses carbon paper for a fuel cell gas diffusion layer and a preparation method thereof, and belongs to the technical field of fuel cells. The method comprises the following steps: oxidizing a carbon nanotube under strong acid to obtain a carboxylated carbon nanotube; mixing the ferroferric oxide with a soluble ferric salt solution, and adding a sodium hydroxide solution to prepare a ferroferric oxide / carbon nanotube compound; mixing the Pickring emulsion with an adhesive, a resin diluent and distilled water to obtain a Pickring emulsion adhesive; the method comprises the following steps: dispersing carbon fibers in an aqueous solution containing a dispersant and a surfactant, pulping to prepare carbon fiber slurry, and papermaking to obtain carbon fiber raw paper; the preparation method comprises the following steps: soaking carbon fiber raw paper in a Pickring emulsion adhesive, and carrying out in-situ demulsification to obtain carbon fiber bonded raw paper; and sequentially carrying out three procedures of water removal of the carbon fiber bonding body paper, magnetic field control of orientation of the magnetic conductive particles and hot press molding to obtain the carbon paper. The method disclosed by the invention is simple, low in consumption, cost-saving, environment-friendly and capable of avoiding the problem that the carbon paper cracks due to multiple times of resin impregnation.

The invention discloses a red phosphorus and graphdiyne composite material as well as a preparation method and application thereof, and belongs to the technical field of battery materials. The preparation method comprises the steps that the carbon paper and the red phosphorus are placed in a vacuum closed reactor to be subjected to heat treatment, in the heat treatment process, the red phosphorus is sublimated and desublimated, and desublimated red phosphorus nanoparticles cover the surface of the carbon paper; carrying out electrochemical deposition on the obtained carbon paper covered with red phosphorus on the surface, so that the surface of the carbon paper is covered with a copper simple substance as a catalyst for graphdiyne growth; and adding the obtained carbon paper into a hexaalkynyl benzene solution, reacting in a dark environment, and washing off unreacted copper elementary substance by using an acidic ferric salt mixed solution to obtain the red phosphorus and graphdiyne composite material. The obtained composite material has wide application prospects in lithium ion batteries and other ion battery negative electrode materials.

The invention discloses a preparation method of a fuel cell gas diffusion layer with a gradient microporous layer, relates to a preparation method of a fuel cell gas diffusion layer, and aims to solve the technical problem of poor water-gas management capability of the existing gradient gas diffusion layer. The preparation method comprises the following steps: preparing dispersion liquid according to different volume fractions of the alcohol solvent, and adding the carbon powder and the water repellent agent into the dispersion liquid to obtain different slurries; the preparation method comprises the following steps: preparing a slurry from a Dongli commercial gas diffusion layer, sequentially coating the surface of hydrophobic carbon paper with the slurry to obtain a gas diffusion layer with a multi-layer microporous layer structure, forming a gradient microporous layer pore channel structure in the longitudinal direction, and ensuring that the porosity of the gas diffusion layer is 82.97%. The peak power density of the fuel cell provided by the invention is 1659-1833 mW.cm <-2 >, which is improved by 21.99%-34.78% compared with that of a fuel cell using a Dongli commercial gas diffusion layer, and the fuel cell can be used in the field of fuel cells.

The present disclosure provides a conductive carbon paper and a preparation method and use thereof, which fall within the technical field of fuel cells. The conductive carbon paper includes a carbon fiber and a binder component, wherein the binder component contains an elastic aid; when a load of 1 MPa is applied in the thickness direction of the carbon paper, the bulk density thereof is 0.30-0.40 g / cm3. The preparation method of the conductive carbon paper is: preparing a carbon fiber base paper including the elastic aid, placing the same in a glue solution for impregnation, and then drying, curing, and carbonizing to obtain. The conductive carbon paper is used for a fuel cell to solve the technical problem that the electrical resistivity of the carbon paper is high when compressed and it is difficult to recover after compression.

The invention discloses a method for improving the mechanical property of carbon paper for a proton exchange membrane fuel cell, which comprises the following steps: obtaining carbon paper raw paper by a carbon fiber modification method and a carbon paper preparation method, and carrying out hot pressing and carbonization on the carbon paper raw paper to obtain a carbon paper finished product. The surface of a finished product can be in an uneven state, the interface bonding strength of the material is effectively improved, the number of communicating pores of the carbon paper body paper is increased, the follow-up phenolic resin dipping capacity of the body paper is improved, and therefore the mechanical properties such as the bending strength of the carbon paper body paper are improved.

The invention relates to a high-entropy alloy composite material with excellent performance under normal-temperature and normal-pressure conditions and application of the high-entropy alloy composite material to electrolyzed water. According to the method, an electrochemical workstation is used for carrying out constant-voltage electrodeposition, the high-entropy alloy material NiFeCoZnCuMnCr is loaded on the surface of the treated carbon paper, the influence of multiple influence factors on the performance and morphology of the high-entropy alloy composite material is explored, and the optimal preparation condition of the high-entropy alloy composite material is found. The high-entropy alloy composite material with a core-shell structure of which the shell is made of multi-metal hydroxide (NiFeCoZnCuMnCr) LDH and the core is made of high-entropy alloy NiFeCoZnCuMnCr HEAs is optimally synthesized by regulating and controlling the total concentration of a precursor solution to be 0.21 mol L <-1 > and the proportion of metal salts to be Ni: Fe: Co: Zn: Cu: Mn: Cr to be 1: 5: 15: 3: 1: 1: 1, the overpotentials required by the high-entropy alloy composite material OER and HER to reach the current density of 100 mA cm <-2 > are 378 mV and 331 mV respectively, and the high-entropy alloy composite material has excellent electro-catalytic performance.

The invention discloses a coating mechanism and carbon paper processing equipment, and belongs to the technical field of fuel cell processing devices.The coating mechanism comprises a rack, a coating roller, a blade coating module and a slit extrusion coating module. The coating roller is rotatably arranged on the rack; the blade coating module is movably arranged on the rack, the blade coating module can be close to or away from the coating roller, and when the blade coating module is close to the coating roller, the blade coating module and the coating roller can define a material containing area; and the slit extrusion coating module is movably arranged on the rack and can be close to or far away from the coating roller. The device has both a blade coating mode and a slit extrusion coating mode, an operator can select any one coating mode according to needs, the equipment cost in the experiment stage is reduced, and the occupied space of the equipment is reduced.

The invention discloses an electrochemical preparation method of a component-controllable indium-indium oxide nanosphere composite catalyst and CO2 reduction application of the component-controllable indium-indium oxide nanosphere composite catalyst. The component-controllable indium-indium oxide nanosphere composite catalyst is prepared from indium nitrate, urea, trisodium citrate, deionized water, absolute ethyl alcohol, a carbon paper electrode and Nafion. Different indium oxide nanosphere precursors are synthesized under the high-temperature and high-pressure reaction conditions of a one-step hydrothermal method, the precursors are placed in a muffle furnace to be subjected to high-temperature calcination to obtain indium oxide nanospheres, the obtained indium oxide nanospheres are subjected to electrode sheet preparation, and the indium-indium oxide nanosphere composite catalyst with controllable components is obtained through electrochemical reduction treatment. The composite material is applied to CO2 electrochemical reduction.

The invention relates to a membrane electrode assembly and a fuel cell, the membrane electrode assembly comprises a catalyst layer (10), a gas diffusion layer (20) and a bipolar plate (30), the gas diffusion layer (20) comprises a porous layer (21) and a carbon paper layer (22), the bipolar plate (30) is provided with ridge parts (31) distributed at intervals, the top surfaces of the ridge parts (31) are in contact with the carbon paper layer (22), the carbon paper layer (22) is provided with carbon paper hydrophilic areas (221) distributed at intervals, and the carbon paper hydrophilic areas (221) are in contact with the porous layer (21). The porous layer (21) is provided with porous hydrophilic areas (211) which are distributed at intervals, the porous hydrophilic areas (211) correspond to the carbon paper hydrophilic areas (221), a part of each carbon paper hydrophilic area (221) is overlapped with a local area of the corresponding ridge part (31), and another part of each carbon paper hydrophilic area (221) is located in a runner area (32). The membrane electrode assembly can improve the electric pile performance under high current density, improve the electric pile power generation efficiency, and improve the whole system efficiency from the system level.

The invention belongs to the technical field of proton exchange membranes, and particularly relates to carbon paper and a preparation method and application thereof. The surface density of the carbon paper is 150g / m < 2 >-300g / m < 2 >, and the volume density of the carbon paper is 0.4 g / cm < 3 >-1.2 g / cm < 3 >. The carbon paper provided by the invention has relatively high surface density, can tolerate extremely high working condition pressure while giving consideration to flexibility, and fully meets relatively harsh use conditions such as a high-pressure cavity environment of a hydrogen production electrolytic cell.

The invention relates to the technical field of gas diffusion layers, and discloses a preparation method and application of a crystalline porous material doped gas diffusion layer, and the preparation method comprises the following steps: S1, adding 6-9 parts by mass of carbon black, a crystalline porous material, 0.1-0.2 part by mass of a thickening agent, 2-4 parts by mass of a water repellent agent and 5-8 parts by mass of a dispersing agent into 75-85 parts by mass of a solvent, and uniformly stirring; wherein the mass ratio of the carbon black to the crystalline porous material is 1: (0.3-1.5), stirring and defoaming to obtain microporous layer slurry; and S2, coating carbon paper subjected to hydrophobic treatment with the microporous layer slurry, and then sequentially drying and sintering to obtain the gas diffusion layer. The gas diffusion layer is prepared from the crystalline porous material with a stable structure and uniform pore size, so that the gas-liquid transmission capability of the gas diffusion layer can be enhanced, the performance of the fuel cell is further improved, and the service life of the fuel cell is further prolonged.

The invention provides high-conductivity and high-strength carbon paper and a preparation method thereof, and relates to the technical field of carbon paper. The preparation method comprises the following steps: pretreating chopped carbon fibers, mixing the pretreated chopped carbon fibers with a dispersing agent, a binder and conductive carbon powder to prepare slurry, and performing papermaking to prepare a carbon paper precursor; carrying out impregnation treatment on the carbon paper precursor in an impregnation liquid formed by thermosetting resin and conductive carbon powder, and then carrying out resin curing to prepare cured carbon paper; performing carbonization treatment on the cured carbon paper, and then performing graphitization treatment. The carbon paper is prepared by the preparation method. By adding the conductive carbon powder into the carbon paper precursor, the conductive carbon powder on the surface of the carbon fiber can enhance the surface roughness of the carbon fiber and improve the strength of a carbon fiber junction point in the carbon paper precursor, so that the prepared carbon paper precursor has better mechanical properties and electrical properties.

The present invention discloses a high-pressure water electrolysis hydrogen production device, including an electrolytic cell stack and a high-pressure clamping structure. The electrolytic cell stack includes a plurality of pole plates and membrane electrodes that are alternately stacked in sequence. Titanium felt and carbon paper are respectively arranged on both sides of the membrane electrode, and a carbon paper pressing groove is arranged on the pole plate near the carbon paper side. The high-pressure clamping structure clamps the electrolytic cell stack, and the carbon paper is pressed into the carbon paper pressing groove. During the clamping installation, excessive compression of the carbon paper is avoided, thereby improving the service life of the water electrolytic cell. The carbon paper pressing groove controls the compression amount of the carbon paper, so that the compression of the carbon paper is always within a limit. The moderate compression of the carbon paper improves the mass transfer capacity of hydrogen while ensuring that the high-pressure water electrolysis hydrogen production device does not leak, thereby improving the performance of the water electrolytic cell.

The invention discloses a method for synthesizing glycine by coupling oxalic acid with nitrate under the electro-catalysis of a molecular catalyst lead phthalocyanine, and belongs to the technical field of materials and electro-catalysis. The method comprises the following steps: uniformly mixing lead phthalocyanine, a dispersing agent and a binding agent to prepare catalyst slurry; loading the catalyst slurry on carbon paper to obtain carbon paper containing a catalyst; an H-type electrolytic tank is assembled, in the H-type electrolytic tank, an electrolyte of an anode chamber is a sulfuric acid solution, an electrolyte of a cathode chamber is a sulfuric acid solution containing oxalic acid and potassium nitrate, and the cathode chamber and the anode chamber are separated through an ion exchange membrane; a calomel electrode is inserted into the cathode chamber as a reference electrode, carbon paper containing a catalyst is used as a working electrode, a platinum sheet is inserted into the anode chamber as a counter electrode, and glycine is obtained through electrolysis. The glycine is prepared by using the lead phthalocyanine as the catalyst, so that the reaction efficiency can be effectively improved, the reaction energy consumption is reduced, and the production process is simplified.

The invention discloses a method for preparing a microporous layer for a fuel cell from fluorinated carbon nanotube modified carbon black, which comprises the following steps: step 1, dispersing carboxylated carbon nanotubes in absolute ethyl alcohol, adding an ammonia water solution after ultrasonic stirring, and then adding tridecafluorooctyltriethoxysilane for reaction to obtain fluorinated carbon nanotubes; step 2, mixing carbon black and fluorinated carbon nanotubes in absolute ethyl alcohol, performing ultrasonic magnetic stirring, and then adding polytetrafluoroethylene to obtain modified slurry; 3, uniformly spraying the modified slurry onto the surface of carbon paper, and drying; and step 4, after drying, carrying out heat treatment on the carbon paper in air, then heating and carrying out heat preservation, so that polytetrafluoroethylene is sintered and firmly bonded with carbon black particles in the carbon paper to obtain a microporous layer. According to the method, the fluorination process is simplified, the production cost is reduced, the prepared microporous layer has good hydrophobicity and keeps high conductivity, and therefore the electrochemical performance of the fuel cell under the high-humidity operation condition can be improved.

The invention discloses a Joule thermal preparation method of a silicon-based composite material compounded by a silicon-based phase and a metal phase and application of the Joule thermal preparation method in a lithium ion battery, and relates to the technical field of lithium ion battery negative electrode materials, and the Joule thermal preparation method specifically comprises the following steps: S1, obtaining a silicon-based original material compounded by the silicon-based phase and the metal phase by adopting a suspension smelting and rapid quenching technology; s2, mixing the silicon-based original material with a conductive agent, and obtaining a silicon-based original material-conductive agent powder material through a sanding technology; and S3, placing the silicon-based original material-conductive agent powder material in rolled carbon paper, clamping the carbon paper at two ends of an electrode, introducing current, raising the temperature of the carbon paper to the highest temperature within a certain time through Joule heat generated by pulse discharge, and preparing the silicon-based composite particles on the carbon paper by using the Joule heat, the silicon-based composite material is obtained. The method disclosed by the invention is simple to operate, good in process controllability, high in yield and low in cost, and shows excellent comprehensive performance in the lithium ion battery.

The invention discloses carbon paper resistivity on-line automatic detection equipment and method. The carbon paper resistivity on-line automatic detection equipment comprises a pressure head module, a detection data acquisition unit, a driving unit and a calculation control unit, the driving unit is used for driving a lifting pressure head of the pressure head module to lift; the detection data acquisition unit is used for acquiring thickness and area data of the carbon paper and calculating carbon paper voltage and current data required by the resistance of the carbon paper; and the calculation control unit is used for receiving the detection data acquired by the detection data acquisition unit in real time and calculating the resistivity of the carbon paper according to the detection data. According to the invention, the efficiency and precision of carbon paper resistivity detection are improved, the full automation of the detection process is realized, the problems of low efficiency, large error and insufficient automation degree in the traditional method are solved, and an efficient and reliable detection solution is provided for industrial production.

The invention discloses an oxygen-vacancy-rich copper-based nano material and a preparation method and application thereof.The preparation method comprises the following steps that under the condition that an alcohol solvent serves as a hydrophilic agent, a copper salt solution serves as an electrolyte, constant-potential electro-deposition is conducted on the surface of hydrophobic carbon paper, the electrolyte is replaced, cyclic voltammetry current modification is conducted, and the oxygen-vacancy-rich copper-based nano material is obtained. Wherein the potential window in the cyclic voltammetry process is-0.3 V to-0.8 V. The particle size of the oxygen vacancy-enriched copper-based nano material can be 1-2 microns, and the main morphology of the oxygen vacancy-enriched copper-based nano material is a broken irregular polyhedron. The oxygen-vacancy-enriched copper-based nano material can be applied to electrocatalytic carbon dioxide reduction reaction, has high multi-carbon product selectivity and has a quite excellent CO by-product inhibition effect.

The invention discloses a carbon-based aqueous zinc ion supercapacitor and a preparation method thereof, and belongs to the technical field of zinc ion supercapacitors. The capacitor comprises a positive electrode, a negative electrode, a multi-element electrolyte and a porous diaphragm, the anode is an activated carbon composite material; the negative electrode is a rolled zinc foil; the multi-element electrolyte is a mixed system aqueous solution formed by dissolving zinc trifluoromethanesulfonate, zinc sulfate, zinc chloride, zinc perchlorate and an electrolyte additive in deionized water; and the porous diaphragm is glass fiber. The preparation method comprises the following steps: uniformly mixing the activated carbon composite material, the conductive black and the binder in proportion, adding the organic solvent, grinding into slurry, coating the slurry on the carbon paper, performing vacuum drying to obtain the positive electrode plate, and assembling the positive electrode plate with the multi-element electrolyte, the negative electrode and the porous diaphragm. The raw material cost and the energy consumption are low, the operability is greatly improved, and the repeatability is good.

The invention provides carbon paper for a fuel cell, a preparation method of the carbon paper and the fuel cell, and the preparation method of the carbon paper for the fuel cell comprises the following steps: providing a polytetrafluoroethylene film, and preparing slurry which comprises graphitized carbon fibers, carbon nanotubes, polytetrafluoroethylene emulsion, phenolic resin dry powder, ethylene glycol, deionized water and triton; coining the slurry on the polytetrafluoroethylene film by using the polytetrafluoroethylene film as a substrate and adopting a silk-screen printing process to prepare a carbon paper blank; putting the carbon paper blank into a drying oven for curing, and stripping the polytetrafluoroethylene film in the cured carbon paper blank to obtain initial carbon paper; and putting the initial carbon paper into a drying oven, and sequentially carrying out carbonization treatment and graphitization treatment under atmosphere protection to prepare the carbon paper. The method is simple in process, controllable in cost and easy for large-scale production, and the prepared carbon paper has good porosity, high transverse conductivity and high transverse gas permeability.