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54results about How to "High nitrogen doping" patented technology
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Preparation method of high-nitrogen-doped graphene nanoparticles and application of high-nitrogen-doped graphene nanoparticles as negative material of lithium ion battery
ActiveCN104201385AEasy to dopeHigh nitrogen contentMaterial nanotechnologyCell electrodesDoped grapheneZinc nitrate
The invention provides a preparation method of high-nitrogen-doped graphene nanoparticles and application of the high-nitrogen-doped graphene nanoparticles as a negative material of a lithium ion battery. The corresponding method comprises the following steps: slowly dropwise adding a preset quantity of zinc nitrate (Zn(NO3)) methanol solution into a methanol mixed solution which is prepared from a preset amount of 2-methylimidazole (C4H6N2) and a preset amount of polyvinylpyrrolidone (PVP), magnetically stirring and standing for preset time, carrying out centrifugal separation to obtain ZIF-8(a complex formed by zinc and 2-methylimidazole) nanoparticles; and putting the obtained ZIF-8 nanoparticles in a high-temperature furnace and calcining at 600-1,000 DEG C for preset time in the nitrogen atmosphere to obtain the high-nitrogen-doped graphene nanoparticles. The preparation process of the high-nitrogen-doped graphene nanoparticles is simple, and the high-nitrogen-doped graphene nanoparticles are uniform in shape, relatively large in specific surface and high in content of nitrogen, and have great application potentials in aspects of lithium ion batteries, electrochemical energy storage, catalysis and the like. The preparation method of the high-nitrogen-doped graphene nanoparticles is simple and efficient, safe and liable to implement, short in synthesis cycle, is capable of preparing a large quantity of high-nitrogen-doped graphene nanoparticles and is expected to be popularized and industrially applied.
Owner:UNIV OF SCI & TECH OF CHINA
Method for preparing nitrogen doped graphene aerogel through modification of plant extract
ActiveCN107226466ANo pollution in the processSimple preparation stepsGrapheneBase functionNitrogen doped graphene
The invention discloses a method for preparing nitrogen doped graphene aerogel through the modification of a plant extract. The method comprises the following steps: taking 1 to 10 parts of a graphene oxide solution, 0.5 to 12 parts of a nitrogen source, and 1 to 30 parts of a plant extract in parts by volume, stirring, and performing ultrasonic dispersion, so as to obtain a mixed liquor; shifting the mixed liquor into a high pressure reaction vessel, and ensuring that the mixed liquor is reacted for 12 to 20h at 80 to 200 DEG, so as to obtain hydrogel; percooling the hydrogel for 1 to 12h at 0 to 20 DEG C after the hydrogel is dialysed, and taking out and naturally drying the hydrogel, so as to obtain the nitrogen doped graphene aerogel. The graphene aerogel prepared through the method has high nitrogen doping content, lays a foundation for the preparation of various nitrogen doped graphene-based function materials, and can be used for preparing various microswitches, micro sensors, supercapacitors, lithium batteries, solar batteries, refractory materials, catalytic materials, adsorption materials and oil absorption materials. The preparation method is simple in technology and convenient to operate, and can realize large-scale production.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Preparation method and application of high-efficiency nitrogen-doped carbon nanotube
ActiveCN107686105ASmall particle sizeEvenly dispersedOrganic compound preparationCarbon compoundsMultiwalled carbonFiltration
The invention discloses a preparation method of a high-efficiency nitrogen-doped carbon nanotube. The preparation method comprises the following steps: adding a multiwalled carbon nanotube into a nitric acid solution; closing the solution in an autoclave; pressurizing to 0.4 to 1.0 MPa, and stirring; then heating to 120 to 200 DEG C and keeping for 1 to 4 hours; finally, cooling to room temperature by the autoclave; washing to neutral and carrying out suction filtration and drying; mixing the carbon nanotube with a melamine solid according to the mass ratio being 1 to (1 to 4), and uniformly grinding by using mortar; and carrying out high-temperature sintering in nitrogen, washing to neutral and then drying to obtain the nitrogen-doped carbon nanotube. The nitrogen doping amount of the high-efficiency nitrogen-doped carbon nanotube disclosed by the invention is 4.6 to 10.3 weight percent.
Owner:TAIYUAN UNIV OF TECH
Preparation method of nitrogen doped hollow mesoporous carbon sphere
InactiveCN105819422AUniform and smooth spherical morphologyEasy to makeMaterial nanotechnologyPorosityNitrogen doped
The invention discloses a preparation method of a nitrogen doped hollow mesoporous carbon sphere. According to the preparation method, resorcinol-formaldehyde resin is taken as the carbon precursor, melamine is taken as the nitrogen source, cetyl trimethyl ammonium chloride is taken as the template, silicate oligomer is taken as the structure support, ammonia liquor is taken as the catalyst, and the size and morphology of hollow carbon nano sphere can be effectively controlled by changing the amount of ammonia liquor. The obtained hollow mesoporous carbon sphere has the characteristics of hollow structure, high porosity, large specific surface area, large pore volume, uniform mesoporous size, and nitrogen doping.
Owner:NANJING UNIV OF SCI & TECH
Preparation method of nitrogen-doped porous carbon foam material and application of nitrogen-doped porous carbon foam material in metal-air battery
ActiveCN106356537ALarge specific surface areaImprove electrocatalytic performanceFuel and secondary cellsCell electrodesFreeze-dryingPorous carbon
The invention discloses a preparation method of a nitrogen-doped porous carbon foam material and application of the nitrogen-doped porous carbon foam material in a metal-air battery. The preparation method comprises the following steps of carrying out concentrated sulfuric treatment on an organic matter containing nitrogen and oxygen, and freeze drying to obtain a precursor; putting the precursor into a protective atmosphere, warming and carbonizing to obtain the nitrogen-doped porous carbon foam material with a porous foam structure, a large specific surface area, uniformity in nitrogen doping, a favorable mechanical property and a favorable electrochemical property. According to the application of the nitrogen-doped porous carbon foam material used as a catalyst in the metal-air battery, the nitrogen-doped porous carbon foam material has excellent catalytic performance, the air electrode polarization can be effectively reduced, and the discharge performance of the air battery is improved.
Owner:CENT SOUTH UNIV
Preparation method and applications of nitrogen doped carbon particle/graphitized carbon-nitrogen composite material
ActiveCN108054020AIncrease contentAdd storage locationsHybrid capacitor electrodesMaterials preparationNitrogen doped
The invention relates to a preparation method and applications of a nitrogen doped carbon particle / graphitized carbon-nitrogen composite material, and belongs to the field of nano composite material preparation. The preparation method mainly comprises following steps: mixing graphitized ZIF-8 polyhedral particles with urea and glucose, grinding the mixture, then burning the powder at a temperatureof 550 DEG C, then burning the powder at a temperature of 700 to 900 DEG C in an inert gas atmosphere so as to further carbonize the material, and finally carrying out pickling to obtain the nitrogendoped carbon particle / graphitized carbon-nitrogen composite material. Due to the addition of mesoporous nitrogen doped carbon particles, the stacking of graphitized carbon-nitrogen layers is inhibited effectively, and thus the composite material has a large specific surface area and a layered porous structure. The preparation method has the advantages of simple and easy technology, good repeatability, low cost, and easy industrial production. The composite material is used as the electrode material of a super capacitor and has high electrochemical energy storage activity.
Owner:江阴智产汇知识产权运营有限公司
Preparation method of nitrogen-doped carbon aerogel applied to lithium-ion battery
InactiveCN106252660AWith graded pore distributionIncrease energy densityCell electrodesPore distributionHigh energy
The invention discloses a preparation method of nitrogen-doped carbon aerogel applied to a lithium-ion battery. The method comprises the steps of firstly, adding taken resorcinol and melamine to an NaOH water solution with the concentration of 1.2g / L, stirring and transferring the mixed solution to a sealed container for gelatinization and ageing to obtain wet gel, soaking the wet gel into acetone for solvent replacement and then drying to obtain aerogel; and putting the aerogel into a tube furnace for carbonization to obtain the nitrogen-doped carbon aerogel. The nitrogen-doped carbon aerogel by employing the melamine as a nitrogen source and resorcinol-melamine-formaldehyde as a carbon source is formed by doping nitrogen into a carbon material, has hierarchical pore distribution and has high energy density and power density when used for a negative electrode of the lithium-ion battery.
Owner:ZHEJIANG UNIV
Preparation method of nitrogen-doped graphene
InactiveCN104760951ARaw materials are easy to obtainSimple and easy preparation processDextrose MonohydrateMass ratio
The invention discloses a preparation method of nitrogen-doped graphene. The preparation method is realized through the following process: weighing melamine and dextrose monohydrate according to a certain mass ratio, grinding for 30min in an agate mortar; placing the mixture in a horizontal quartz tube furnace heating area, introducing argon in a certain flow as protective gas, raising the temperature in a furnace chamber to 450 DEG C in a certain rising rate, and carrying out heat preservation for 90min, raising the temperature in the furnace chamber to a certain temperature in the same rising rate, and carrying out heat preservation for 60min; after the reaction is finished, taking out the product when the temperature in the furnace chamber naturally cools to the room temperature, wherein the product is the nitrogen-doped graphene. The preparation method disclosed by the invention has the characteristics of easily available raw material, low cost, simple preparation process, clean and environment-friendly synthesis path, no pollution, and high nitrogen doping amount; the preparation method has popularization and application value.
Owner:XINJIANG UNIVERSITY
Method for preparing nitrogen-doped carbon material from biomass
InactiveCN112194127AEasy to dopeIncrease loadCarbon compoundsEnergy inputActivated carbonEnvironmental engineering
The invention relates to a method for preparing a nitrogen-doped carbon material from biomass. The method comprises the following steps: crushing biomass into fine particles; uniformly mixing the crushed biomass particles with an acidic ammonium salt solution according to a certain ratio to form a mixture; putting the mixture into a hydrothermal reaction kettle, and carrying out a hydrothermal reaction under a certain temperature condition; dehydrating and drying hydrothermal carbon obtained after the hydrothermal reaction; and putting the dried hydrothermal carbon into a pyrolyzing furnace, and carrying out rapid pyrolysis under the protection of an inert atmosphere under a certain temperature condition to obtain a nitrogen-doped carbon material subjected to rapid pyrolysis. According tothe invention, the raw material adopted by the method is renewable energy, covers all biomass raw materials, and has the advantages of rich reserves, low cost and environmental protection compared with coal as a raw material for preparing the activated carbon.
Owner:HEFEI UNIV OF TECH
Preparation method and application of carbon-nitrogen doped ternary metal oxides
The invention relates to a preparation method and application of carbon-nitrogen doped ternary metal oxides. The preparation method includes the steps of S1, synthesizing a Zn-IM framework material coordinated by zinc and 2-methylimidazole; S2, weighing the Zn-IM framework material and cobalt nitrate hexahydrate, and dispersing the Zn-IM framework material and the cobalt nitrate hexahydrate into a solvent for microwave reaction to obtain a coordinated Co-Zn-IM framework material; S3, weighing the coordinated Co-Zn-IM framework material, sodium dodecyl sulfate, hexadecyl trimethyl ammonium bromide and copper chloride dihydrate, and dispersing the above materials into a solvent for microwave reaction to obtain a coordinated trimetallic heterozygous Cu-Co-Zn-IM framework material; S4, roasting the coordinated trimetallic heterozygous Cu-Co-Zn-IM framework material prepared in the step S3 so as to obtain the carbon-nitrogen doped ternary metal oxides. The preparation method has the advantages that with the 2-methylimidazole serving as a ligand, highly nitrogen-doped metal oxides can be obtained, and accordingly the prepared carbon-nitrogen doped ternary metal oxides are high in electrochemical stability and specific capacity and can act as an anode material of lithium ion batteries to improve the specific capacity of the lithium ion batteries.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Nitrogen-doped titanium dioxide solvent thermal preparation method
InactiveCN1935668AAvoid growing upMild preparation conditionsPhysical/chemical process catalystsTitanium dioxideGas phaseSolvent
The invention provides a solvent-heat preparing method of N-doped TiO2, comprising: adding TiO2 into the solvent of N-containing organic alkali and water or alcohol, ultrasonic vibrating, pouring the mixture into a corrosion-resistant stainless steel hydrothermal reactor at room temperature, raising temperature to make solvent heat reaction, filtering, washing and drying and making it. And the invention overcomes the aggregation growth in the high temperature gas-phase reacting course, directly adopts TiO2 to one-step synthesize it by simple solvent heat synthesis process. And it has good dispersivity, small and uniform particles, high nitrogen doping quantity, high catalytic activity in the sun, etc.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method and application of nitrogen-doped porous carbon fiber material
ActiveCN111235698AIncrease the active siteIncrease surface nitrogen contentElectroconductive/antistatic filament manufactureHybrid capacitor electrodesCarbon fibersSpinning
The invention discloses a preparation method and application of a nitrogen-doped porous carbon fiber and belongs to the technical field of preparation of porous carbon fiber materials. The preparationmethod comprises the following steps of firstly, preparing a polyacrylonitrile / polyvinylpyrrolidone spinning precursor solution, then obtaining a porous polyacrylonitrile fiber through a wet spinningmethod by utilizing different solubilities (phase separation) of the polyacrylonitrile and the polyvinylpyrrolidone in an aqueous solution, soaking and activating the obtained porous polyacrylonitrile fiber in a potassium hydroxide solution, taking the polyacrylonitrile as a carbon source and a nitrogen source, and carrying out one-step high-temperature carbonization activation treatment in an inert atmosphere to obtain the nitrogen-doped porous carbon fiber. The porous carbon fiber material has a hierarchical porous carbon skeleton structure with high specific surface area, high nitrogen content and mutual crosslinking, a fast channel is provided for electron transmission, the ion diffusion distance is shortened, the wettability and conductivity of the material are increased, and good electrochemical performance is shown. The preparation process is simple, the equipment dependence is low, and the method is suitable for large-scale industrial production.
Owner:BEIHUA UNIV
High-capacitance polyindole nitrogen-doped porous carbon material and preparation method thereof
InactiveCN107045944AHigh nitrogen dopingImprove charge and discharge stabilityHybrid capacitor electrodesHybrid/EDL manufactureCapacitanceHigh rate
The invention discloses a high-capacitance polyindole nitrogen-doped porous carbon material and a preparation method thereof, and belongs to the technical field of processing of a carbon material. The high-capacitance polyindole nitrogen-doped porous carbon material comprises the following constituents based on parts by weight: 10-30 parts of indole compound, 30-90 parts of oxidizing agent, 60-180 parts of activating agent and 300-1,000 parts of solvent. The nitrogen-doped porous carbon material provided by the invention has the characteristics of relatively high nitrogen-doped quantity, large-pore diameter distribution, high charge-discharge stability, high-rate performance and high specific capacitance value.
Owner:JIANGXI SCI & TECH NORMAL UNIV
Method for preparing nitrogen-doped graphene by treating carbonate by shock waves
InactiveCN104261388ALow requirements for production conditionsNo protectionShock waveChemical reaction
The invention discloses a method for preparing nitrogen-doped graphene by treating carbonate by shock waves and belongs to the technical field of processes. The method comprises the following steps: uniformly mixing a carbon source, a reducing agent and a nitrogen source and compacting to obtain an initial blank; colliding a sample box by using a flyer to induce chemical reaction to obtain powder; putting the powder into a reactor, adding concentrated nitric acid for purification, reacting and filtering and washing to obtain a solid a; and drying to obtain the nitrogen-doped graphene. The number of molecular layers of the nitrogen-doped graphene is 1-6, and the nitrogen doping content is high, so that the nitrogen-doped graphene has good oxygen reduction catalytic activity. The method is low in cost, short in production period, simple in process and low in requirements on production conditions, hardly causes dangers in the production process and can be put into industrial production conveniently.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Nitrogen-doped expanded graphite paper current collector and preparation and application thereof
ActiveCN110875477ALow densityImprove conductivityElectrode carriers/collectorsSecondary cellsLithium–sulfur batteryElectrical battery
The invention belongs to the field of battery materials, and particularly discloses a nitrogen-doped expanded graphite paper current collector, which comprises expanded graphite paper and a nitrogen-doped amorphous carbon material compounded on the surface of the expanded graphite paper in situ. The invention further discloses a preparation method for the current collector. The graphite paper is infiltrated with ionic liquid, the graphite paper infiltrated with the ionic liquid is subjected to heat preservation for 5 min to 8 h at the temperature of 400 DEG C to 1000 DEG C in the air atmosphere, and the current collector is obtained. The invention also discloses the application of the current collector in preparation of a positive electrode, a battery, especially a lithium-sulfur battery.According to the preparation method for the carbon-based current collector provided by the invention, one-step treatment of nitrogen doping and expansion of the graphite paper is realized, the nitrogen doping improves the conductivity of the graphite paper, the expansion realizes the infiltration of the graphite paper by the electrolyte, buffer space is provided for the volume change of the activematerial in the charging and discharging process, and meanwhile, the active material is restrained between the layers of the expanded graphite paper, so that the active material can be prevented fromfalling off from the current collector, and the stability of the electrode is improved.
Owner:HUNAN UNIV OF SCI & TECH
Preparation method of improved type graded porous carbon-doped material
InactiveCN109368636ASimple processImprove output per unit timeCarbon compoundsFreeze-dryingPorous carbon
The invention relates to a preparation method of an improved type graded porous carbon-doped material. The method mainly overcomes the shortcomings of complex technology, long production cycle, relatively low efficiency, much wastewater discharge, relatively high cost and the like of CN105480963A, abandons original steps such as deionized water purifying and balancing treatment and soaking treatment in an acid solution, and adopts a process of directly freeze-drying the prepared hydrogel and performing high-temperature carbonization and then washing and drying to obtain a target product. Compared with the prior art, in particular to the CN105480963A, the graded porous carbon-doped material prepared by the method provided by the invention has the advantages of more abundant doping atoms, more porous structures on the surface and more excellent electrical properties.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Preparation of nitrogen-doped biochar material and method for improving dark fermentation hydrogen production performance
ActiveCN111111739ASimple production processAbundant sources of materialsPhysical/chemical process catalystsFermentationDark fermentationNitrogen atmosphere
The invention provides nitrogen-doped biochar which is simple in production process and low in green cost, and the nitrogen-doped biochar is applied to the process of improving the dark fermentation hydrogen production performance for the first time. The nitrogen-doped biochar material takes corncob powder and melamine as raw materials; the high-nitrogen-doped biochar material is finally obtainedthrough high-pressure and high-temperature cooking, activator dipping, nitrogen atmosphere carbonization, washing and drying, and the bottleneck that in the prior art, the nitrogen-doped biochar material preparation process is low in nitrogen content, high in cost and complex in process, and dark fermentation hydrogen production efficiency is low is overcome.
Owner:QILU UNIV OF TECH
A kind of nitrogen-doped porous carbon, its preparation method and its application as supercapacitor electrode material
ActiveCN106629724BLarge retention valueLarge specific surface areaCarbon compoundsHybrid capacitor electrodesCapacitancePorous carbon
The invention discloses a nitrogen-doped porous carbon, a preparation method and its application as a supercapacitor electrode, belonging to the technical field of energy materials and applications. The invention uses the natural waste product peanut shells as raw materials, and prepares nitrogen-doped porous carbon after ball milling, sieving, high-temperature activation and washing. The nitrogen-doped porous carbon prepared by this method has hierarchical pores of micropores and mesopores, the pore diameter is mainly distributed in the range of 2 to 5 nanometers, the specific surface area is 1000 to 1200 square meters per gram, and the mass ratio of nitrogen content is 8 to 10%. The specific capacitance is 290-310 Faradays / g, and the mass energy density of the prepared nitrogen-doped porous carbon-based supercapacitor is 40-43 Wh / kg, and has excellent cycle stability, so it can be better used in supercapacitors. Capacitor electrode field.
Owner:ANHUI UNIVERSITY
Preparation method of three-dimensional nitrogen-doped carbon fibers
InactiveCN105951216AStable structureImprove structural stabilityPhysical treatmentCarbon fibresFiberInorganic salts
The invention discloses a preparation method of three-dimensional nitrogen-doped carbon fibers. The preparation method comprises steps as follows: (1) 1 g of commercially available short carbon fibers are added to a mixed solution of 30 mL of commercially available concentrated sulfuric acid and 10 mL of commercially available concentrated sulfuric acid, the mixture reacts at the temperature of 60 DEG C for 1-4 hours, and acidized carbon fibers are obtained; (2) 1 g of the acidized carbon fibers are put into a crucible and subjected to microwave treatment in a microwave oven; (3) 200 mg of the product obtained in the step (2) is mixed with ammonium salt; (4) the mixture obtained in the step (3) is subjected to thermal treatment in an N2 atmosphere, and the three-dimensional nitrogen-doped carbon fibers are obtained, wherein ammonium salt is one of NH4Cl, (NH4)2SO4 and (NH4)3PO3. The preparation method is simple to operate, the carbon fibers with stable structures are obtained with a microwave expansion method, inorganic salt is taken as a nitrogen source, nitrogen doping treatment is performed in the thermal treatment process, follow-up cleaning and drying processes are not required, and the obtained product has good structural stability and high nitrogen doping content.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Ultralow-oxygen-content three-dimensional nitrogen-doped graphene aerogel and preparation method thereof
ActiveCN113387346AReduce oxygen contentLow nitrogen dopingGrapheneDoped grapheneNitrogen doped graphene
The invention discloses an ultralow-oxygen-content three-dimensional nitrogen-doped graphene aerogel and a preparation method thereof, belonging to the technical field of graphene aerogel. According to the method, a graphene oxide precursor is adopted for preparation of low-carboxyl highly-hydroxylated graphene oxide through an electrolytic method; and then one-step hydrothermal reduction nitrogen-doped in-situ self-assembling and high-temperature sintering are conducted to obtain the ultralow-oxygen-content three-dimensional nitrogen-doped graphene aerogel with a light three-dimensional grid structure, wherein an oxygen content is less than 0.1 at.%, a nitrogen doping amount is 4-12%, and pyridine type nitrogen accounts for 30-80%.
Owner:GRIMAT ENG INST CO LTD
Preparation method of composite positive pole material for lithium sulphur battery
InactiveCN103107318BImprove conductivityLarge specific surface areaCell electrodesModified carbonPhysical chemistry
The invention discloses a preparation method of a composite positive pole material of a lithium sulphur battery. The preparation method comprises the following steps of: (1) utilizing activation and nitrogen doping to simultaneously carry out modification on a carbon aerogel to obtain a modified carbon aerogel material; and (2) slowly adding the modified carbon aerogel in an organic sulfur solution, taking a supercritical fluid as an extraction agent to ultrasonically extract in an extraction kettle under room temperature, carrying out pressure reduction and separation, leaching by an ethanol eluting agent, and drying to obtain the modified carbon aerogel-sulfur composite positive pole material. The material prepared by the preparation method provided by the invention has the advantages that the sulfur content is high, the sulfur particles are small, the granularity is uniformly controllable, and the material simultaneously has higher conductibility, specific surface area and porosity. The recovery of the used organic solvent is simple in the preparation process, the extraction agent is circularly used through compression, the extraction efficiency is high, the operation is simple, and the pollution is not generated.
Owner:SHENZHEN RES INST CENT SOUTH UNIV
Preparation and application of hydrophobic Schiff base cobalt-beta cyclodextrin-graphene porous carbon composite material
ActiveCN110931271AImprove hydrophobicityEfficient constructionHybrid capacitor electrodesCarbon preparation/purificationCarbon compositesCapacitance
The invention relates to preparation and application of a hydrophobic Schiff base cobalt-coated beta cyclodextrin-graphene porous carbon composite material. The method comprises the following steps: synthesizing a hydrophobic 5-chlorosalicylaldehyde dicyandiamide Schiff base cobalt metal complex by adopting a homogeneous reaction kettle and an alcohol-thermal method, then forming an inclusion compound with hydrophobic beta-cyclodextrin, stably crosslinking with graphene oxide, and finally filtering, washing, drying, calcining at high temperature and the like. The material has the following advantages that the 5-chlorosalicylaldehyde dicyandiamide schiff base cobalt metal complex has a hydrophobic structure, and reaction basic conditions are provided for successful embedding of beta-cyclodextrin with an internal hydrophobic and external hydrophilic structure; a solvothermal method and a carbonization method are adopted, so that the process is simple and environment-friendly; the water / alcohol medium system enhances the dispersity of the material. When the material is used as a supercapacitor electrode material, the material is charged and discharged in a range of 0-0.4 V, the specific capacitance can reach 500-1000F / g when the discharge current density is 1A / g, and the material has excellent electrochemical characteristics and chemical stability.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Graphene and preparation method thereof as well as electrode material
PendingCN109748263AReduce the number of layersEasy to introduceHybrid capacitor electrodesGrapheneCarbonizationNitrogen doped graphene
The invention provides a preparation method of graphene. The preparation method comprises the following step: carbonizing an organic matter containing carbon and nitrogen to obtain graphene. The organic matter containing carbon and nitrogen is prepared by the following step: mixing a nitrogen-containing phenanthrene compound with an organic matter to obtain the organic matter containing carbon andnitrogen; the nitrogen-containing phenanthrene compound has the structure of formula I as shown in the specification, wherein R1-R8 are independently selected from alkyl, aromatic or alkoxy groups with the number of each of hydrogen atom and carbon atom being 1-12; m is equal to 0 or 1; n is equal to 0 or 1; and the organic matter is selected from one or more of vitamin, cyanamide, amino acid andnitrogen-containing dye. In the invention, a nitrogen-doped graphene material is prepared by direct carbonization of the organic matter containing carbon and nitrogen in one step, no step of removinga metal catalyst or transferring is required, the preparation process is simple and easy to operate, and the cost is saved. The invention also provides the graphene and an electrode material.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Preparation method for cold plasma nitrogen-doped carbon fibers
InactiveCN106337274AImprove structural stabilityHigh nitrogen dopingPhysical treatmentAir atmosphereFiber
The invention discloses a preparation method for cold plasma nitrogen-doped carbon fibers. The preparation method comprises the steps: (1) placing 1 g of commercially available short chopped carbon fibers in an atmosphere furnace, and carrying out heat preservation for 10-60 minutes at the temperature of 450 DEG C, to obtain heat-treated carbon fibers; (2) adding the heat-treated carbon fibers obtained in the step (1) to 100 mL of H2O2 with the mass concentration of 10%-30%, and oxidizing for 2-24 hours, to obtain oxidized carbon fibers; and (3) placing the oxidized carbon fibers obtained in the step (2) in an N2, NH3 or air atmosphere cold plasma generating device with the gas flow rate of 1 L / min-5 L / min, and carrying out nitrogen doping treatment for 10-60 minutes at 10-40 W, to obtain the nitrogen-doped carbon fibers. The preparation method has the advantages of low energy consumption, easy operation, environmental friendliness, and no need for subsequent cleaning and drying processes; and the obtained product has good structure stability and high nitrogen doping amount.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Method for preparing nitrogen-doped carbon material by utilizing fluorine-containing macromolecules
ActiveCN112723334ALow costRealize environmental protection and waste utilizationCarbon fibresHybrid capacitor electrodesDoped carbonPolymer
The invention relates to a method for preparing a nitrogen-doped carbon material from fluorine-containing macromolecules, which comprises the following steps: putting a fluorine-containing macromolecule precursor material in an ammonia atmosphere, and calcining at 360-1200 DEG C to obtain the nitrogen-doped carbon material, wherein the fluorine-containing polymer precursor material is a polymer of which the relative molecular mass is 1,000 to 10,000,000 and part of hydrogen is substituted by fluorine. In this way, the nitrogen-doped carbon material can be obtained at a low temperature, and due to the fact that electron exchange of fluorine and nitrogen species can greatly promote doping of the nitrogen element, the nitrogen content of the nitrogen-doped carbon material obtained through the method can reach 10% or above. Besides, controllable doping of the nitrogen content and type on the conductive carbon felt can be realized by regulating and controlling the reaction temperature.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Nitrogen-doped porous carbon material as well as preparation method and application thereof
ActiveCN111874886AEnsure mixing uniformityLarge specific surface areaCell electrodesCarbon preparation/purificationPorous carbonFreeze-drying
The invention belongs to the technical field of porous carbon materials, and discloses a nitrogen-doped porous carbon material as well as a preparation method and application thereof. The method comprises the following steps: 1) in a mixed solvent containing water, mixing a triblock copolymer F127, an organic nitrogen source, magnesium chloride and potassium ferrate, adding agarose, uniformly mixing the components, cooling the mixture to form hydrogel, and freeze-drying the hydrogel to obtain dry gel; 2) carbonizing the dry gel to obtain a nitrogen-doped porous carbon material, wherein the carbonization treatment is to carbonize the dry gel at the temperature of 800-900 DEG C; or the carbonization treatment is that the xerogel is subjected to primary carbonization, acid treatment and secondary carbonization. The method is simple, and the obtained nitrogen-doped porous carbon material has a large specific surface area, a large number of defect sites, a high nitrogen doping amount and excellent oxygen reduction performance. The invention also discloses the application of the nitrogen-doped porous carbon material in electrocatalytic oxygen reduction reaction as an oxygen reduction reaction electrocatalyst.
Owner:SOUTH CHINA UNIV OF TECH
Nitrogen-doped three-dimensional bicontinuous porous structure ultra-thin carbon layer and its preparation method and application
ActiveCN106517133BLarge specific surface areaHigh nitrogen dopingCarbon preparation/purificationCarbon layerElectrical battery
The invention discloses a nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer and a preparation method and application thereof. The preparation method comprises the steps that shrimp shell pretreatment is conducted, by taking urea or melamine or pyrrole as a nitrogen source and taking shrimp shells subjected to treatment as a raw material, under inert gas flow, low-temperature pre-carbonization is conducted, then, high-temperature pyrolysis is conducted with alkaline matter, acid treatment is conducted at last, and the nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer is obtained. The nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer prepared through the method has a unique nano ultrathin carbon layer structure, a high specific surface area and a total pore volume, is simple in technology, low in cost, friendly to environment, and has good physical and chemical properties. The nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer can be applied to a supercapacitor, a secondary battery and gas absorption, and a new way for developing new energy biomass materials is opened up.
Owner:HUAZHONG UNIV OF SCI & TECH
A kind of composite material, its preparation method and application
ActiveCN104659381BHigh Nitrogen DopingHigh catalytic activity for oxygen reductionMaterial nanotechnologyFuel and primary cellsMaterials preparationCobalt metal
The invention discloses a composite material as well as a preparation method and an application thereof. The composite material has a core-shell structure which takes cobalt metal as an inner core and carbon nanomaterial doped with nitrogen atoms as a shell, wherein the surface of the cobalt metal inner core is evenly wrapped with cobalt oxide, the doping content of the nitrogen atoms is within the range of 2-9.6%, and the mass fraction of cobalt element is within the range of 5-20%. The preparation method comprises the following steps: (1) mixing melamine, concentrated acid and water in proportion, and heating until the mixture is transparent; (2) feeding the carbon nanomaterial and cobalt salt, evenly mixing and cooling; (3) drying; (4) heating up to 500-800 DEG C under the condition of insulating oxygen, and calcining for 2-10 hours. The carbon-cobalt composite nanomaterial is higher in nitrogen doping amount, has better oxygen reduction catalytic activity and stability, and is simple in preparation technology and low in cost, thus being suitable for large-scale production.
Owner:HUAZHONG UNIV OF SCI & TECH
A kind of nitrogen-doped expanded graphite paper current collector and its preparation and application
ActiveCN110875477BLow densityImprove conductivityElectrode carriers/collectorsSecondary cellsLithium–sulfur batteryElectrical battery
Owner:HUNAN UNIV OF SCI & TECH
A method for preparing nitrogen-doped carbon material containing pure pyridine nitrogen based on chemical vapor deposition
ActiveCN106784872BHigh nitrogen dopingNitrogen doping amount controllableMaterial nanotechnologyCell electrodesPyridiniumCarbon fibers
The invention discloses a method for preparing a nitrogen-doped carbon material containing pure pyridine nitrogen on the basis of chemical vapor deposition. The method comprises the following steps: generating carbon nanofibers on the surface of a substrate by virtue of a chemical vapor deposition method, performing corrosion treatment on the carbon nanofibers by adopting a hydrofluoric acid, and performing nitrogen doping on the carbon nanofibers subjected to the corrosion treatment to obtain the nitrogen-doped carbon material. The preparation method is easy to operate, low in cost and suitable for large-scale production; the prepared nitrogen-doped carbon material has the characteristics of large nitrogen doping amount and doping amount controllability, and the application requirement of a fuel cell is met by a pure pyridine nitrogen-containing structure.
Owner:CENT SOUTH UNIV
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