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108results about How to "Doping achieved" patented technology
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Doped graphene electrode material, macro preparation method and application of doped graphene electrode material
InactiveCN102306781AImprove conductivityGood thermal stabilityCell electrodesHigh current densityDoped graphene
The invention relates to the field of graphene electrode materials, and in particular relates to a doped graphene electrode material, a macro preparation method as well as an application of the doped graphene electrode material in a high-capacity high-multiplying-power lithium ion battery. In the invention, graphene is taken as a raw material. The preparation method comprises the following steps: controlling the temperature rising speed rate through shielding gas; introducing gas containing nitrogen or boron elements in different concentrations at high temperature so as to realize the doping of heteroatoms of the graphene, and get the nitrogen or boron doped graphene; mixing the doped graphene, conductive carbon black and a bonding agent; adding a solvent; coating the mixture on a current collector after grinding; taking the mixture after drying, shearing and tabletting as a working electrode; adding electrolyte containing a lithium salt by taking a lithium plate as a counter electrode / reference electrode; assembling into a button-type lithium ion half-battery in a glove box; and carrying out constant current charge and discharge tests under the condition of high current density. According to the invention, the electrode stability of the material under the condition of high current density is improved, and the fact that the doped graphene has higher specific capacity and excellent cycle performance in a shorter time is realized.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Bismuth oxyhalide light-emitting material with doped rare earth ions and preparation method thereof
InactiveCN103421511AGood luminous propertiesHigh light absorption and excitation efficiencyLuminescent compositionsLight absorbanceBismuth
The invention provides a bismuth oxyhalide light-emitting material with doped rare earth ions and a preparation method of the bismuth oxyhalide light-emitting material with the doped rare earth ions. The chemical formula of the bismuth oxyhalide light-emitting material with the doped rare earth ions is Bil-x-yEuxReyOM, wherein the x is 0.001-0.5, the y is 0-0.5, the M is one or more of Cl, Br and I, and the Re is any one or more of Tb, Ce, Nd, Dy, Sm, Pr, Lu, Er, Tm, Yb, Gd, Ho and La. The preparation method of the bismuth oxyhalide light-emitting material with the doped rare earth ions comprises the steps that (1) bismuth nitrate, rare earth nitrate and halogenated potassium are weighed, and a solution is prepared; (2) thermal treatment is carried out on the obtained solution to obtain produced materials, washing is carried out, thermal treatment is carried out again, and the bismuth oxyhalide light-emitting material with the doped rare earth ions can be obtained, wherein the chemical formula of the bismuth oxyhalide light-emitting material with the doped rare earth ions is Bil-x-yEuxReyOM. The bismuth oxyhalide light-emitting material with the doped rare earth ions can effectively achieve doping, has the good light-emitting characteristic, and is high in absorption efficiency and excitation efficiency to ultraviolet light and light of the visible light waveband, simple in preparation method, easy to control, low in cost of raw materials and low in resultant temperature of the high-temperature solid state method.
Owner:KUNMING UNIV OF SCI & TECH
Method for realizing controlled doping of nano silicon quantum dots
InactiveCN101570312AShort processing timeImprove photoelectric propertiesNanostructure manufactureQuantum dotNanoelectronics
The invention relates to a method for realizing controlled doping of nano silicon quantum dots, which belongs to the technical field of nano photoelectronic devices. The method comprises the steps of preparing a doped amorphous silicon film, preparing a doped amorphous silicon multilayer film, preparing doped nano silicon quantum dots in virtue of laser radiation, and the like. The invention provides a preparation method for convenient, rapid and effective controlled doping of the nano silicon quantum dots, and the method has short processing time, does not damage a film and a substrate in a nanosecond level, and is compatible with the current micro-electronics processing technology. In the implementation process, the method mainly adopts a high-energy laser to irradiate the surface of the film to obtain the nano silicon quantum dots with uniform size, simultaneously realize the controlled doping of impurity concentration and improve the photoelectric property of the film. The doped nano silicon quantum dots prepared by the method have wide application prospect in the fields of future nanoelectronics, nano photoelectronic devices and the like.
Owner:NANJING UNIV
Er<3+>/Yb<3+> co-doped yttrium lithium fluoride monocrystal and preparation method thereof
InactiveCN102978701AHigh phonon energyPhonon energy low highPolycrystalline material growthFrom frozen solutionsWater vaporOxygen
The invention discloses an Er<3+> / Yb<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+> / Yb<3+> co-doped monocrystal; the molecular formula is LiY(1-x-y)ErxYbyF4, wherein x is greater than or equal to 0.008 and less than or equal to 0.085, and y is greater than or equal to 0.002 and less than or equal to 0.170; the segregation coefficients of Yb<3+> and Er<3+> in the yttrium lithium fluoride are about 1, and efficient intermediate infrared laser of 2.7 microns can be output; and the yttrium lithium fluoride monocrystal has high transmittance of intermediate infrared laser, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+> / Yb<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.
Owner:NINGBO UNIV
Tungsten-doped vanadium dioxide nanopowder and preparation method thereof
ActiveCN102295312ADoping achievedGood dispersionNanostructure manufactureVanadium oxidesVanadium dioxideTungstate
The invention discloses a tungsten-doped vanadium dioxide nanopowder and a preparation method for the nanopowder. The powder is flaky or conic rod-shaped tungsten-doped B-phase vanadium dioxide of which the chemical formula is V1-xWxO2; the flaky V1-xWxO2 is 1-10 nm thick, 350-450 nm wide and 3-5 mum long, and the conic tip diameter of the conic rod-shaped V1-xWxO2 is 15-25 nm, the cone length is110-150 nm, the rod diameter is 130-150 nm and the rod length is 1-2 mum; the preparation method comprises the following steps of: firstly, weighting vanadium pentoxide and ammonium tungstate according to a component ratio of the V1-xWxO2, melting the weighted vanadium pentoxide and ammonium tungstate and preserving heat for at least 20 minutes, then, dipping the molten mass in a quenching media and stirring for at least 12 hours, standing and aging for at least 10 days to obtain a doped sol, afterwards, adding polyethylene glycol aqueous solution into the doped sol, stirring for at least 8 hours to obtain mixed solution, and setting the mixed solution to be airtight for reaction for 2-6 days at the temperature of 180-220 DEG C so as to prepare the tungsten-doped B-phase vanadium dioxide powder. The tungsten-doped B-phase vanadium dioxide powder can be used as electrode material for lithium ion batteries; and after being annealed, the tungsten-doped B-phase vanadium dioxide powder canbe prepared into a phase-change metallic oxide material with wider application, namely, a tungsten-doped M-phase VO2.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Graphene/WSe2/NiFe-LDH aerogel and preparation thereof
ActiveCN109205596ASecurity strippingLow costHybrid capacitor electrodesGrapheneCapacitanceDoped graphene
The invention relates to a graphene / WSe2 / NiFe-LDH aerogel and a preparation method thereof. The preparation method comprises following steps: mixing graphene oxide sheet dispersion liquid and WSe2 nano sheet dispersion liquid; adding at least one of a reducing agent, a crosslinking agent, and a pH adjuster, evenly mixing, carrying out reactions to obtain graphene / WSe2 hydrogel, freeze-drying the hydrogel to obtain graphene / WSe2 aerogel; soaking the graphene / WSe2 aerogel in NiFe-LDH nano sheet dispersion liquid to prepare graphene / WSe2 / NiFe-LDH hydrogel, and carrying out freeze-drying to obtaingraphene / WSe2 / NiFe-LDH aerogel. The provided N,S co-doped graphene / WSe2 / NiFe-LDH (N,S co-doped graphene / tungsten diselenide / NiFe-LDH) preparation method is simple, the cost is low, and the preparedN,S co-doped graphene / WSe2 / NiFe-LDH has excellent electrochemical properties such as large specific capacitance, good cycle performance, small internal resistance, and the like.
Owner:SHANGHAI INST OF TECH
Tantalum-modified high-nickel cathode material and preparation method and application thereof
ActiveCN110993903ADoping achievedImprove electrochemical performanceSecondary cellsPositive electrodesLithium hydroxidePhysical chemistry
The invention discloses a tantalum-modified high-nickel cathode material and a preparation method and application thereof. In the material, the tantalum element is doped on the surface of the high-nickel cathode material, and the doping mass of the tantalum element is 0.1-2%. The preparation method comprises the following steps: mixing tantalum pentoxide, the precursor of the high-nickel cathode material and lithium hydroxide, and carrying out high-temperature calcination to obtain the tantalum-modified high-nickel cathode material. According to the invention, Ta doping can stabilize the layered structure of the body material, widen the lithium ion transmission channel, and further improve the electrochemical performance of the high-nickel material.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Er<3+>/Pr<3+> co-doped yttrium lithium fluoride monocrystal and preparation method thereof
InactiveCN102978700ASensitizationEfficient transferPolycrystalline material growthFrom frozen solutionsFluorescenceWater vapor
The invention discloses an Er<3+> / Pr<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+> / Pr<3+> co-doped monocrystal; and the molecular formula is LiY(1-x-y)ErxPryF4, wherein x is greater than or equal to 0.010 and less than or equal to 0.085, and y is greater than or equal to 0.0001 and less than or equal to 0.008. The yttrium lithium fluoride monocrystal has the advantages of high emission efficiency of fluorescence of 2.7 microns and high transmittance in intermediate infrared ray, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+> / Pr<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.
Owner:NINGBO UNIV
Softening method for producing ferroelectric and ferromagnetic composite material powder by home position
A soft chemical method for in-situ preparing powder with ferroelectric and ferromagnetic composite materials is carried out by adding ferrite metal nitrate and ferroelectric metal nitrate into citric acid solution, heating, stirring, adding into ferroelectric metal alkoxide, adjusting pH value, obtaining homogeneous and stable sol, preparing powder, drying the obtained precursor, baking, burning and heat treating the burnt powder to obtain the final powder. It is cheap and simple, and has better chemical evenness, high purity and fine particles.
Owner:UNIV OF SCI & TECH BEIJING
Rare-earth-ion or transient metal ion doped scandium aluminium-magnesium-salt fluorescent lining base
InactiveCN101070472ADoping achievedSimple manufacturing processLuminescent compositionsSemiconductor devicesManufacturing cost reductionOctahedron
Aluminum magnesium acid indium fluorescence undercoat is a mixture of a rare earth ionic or transition-metal ionic. The fluorescence undercoat is made of mixing aluminum magnesium acid scandium host crystal with rare earth ionic instead of scandium ionic or transition-metal ionic instead of aluminum or magnesium ionic. The ways of making the fluorescence undercoat can be divided into five methods: pull method, temperature gradient method, crucible fall method, heat change method or floating-zone method. The advantages of making white glowing diode by the fluorescence undercoat are: increases the stability of radiant capacity of the components, simplifies the making article of the white glowing diode, decreases the cost and increases the glowing efficiency of white glowing diode.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Sulfur-nitrogen co-doped graphene modified graphite felt composite electrode and preparation method thereof
ActiveCN111509235AImprove performanceImprove responseCell electrodesRegenerative fuel cellsDoped grapheneThiourea
The invention discloses a sulfur-nitrogen co-doped graphene modified graphite felt composite electrode and a preparation method thereof. The preparation method comprises the following steps: s1, adding graphene oxide into deionized water to prepare a 1mg / ml-5mg / ml solution, carrying out ultrasonic oscillation dispersion, carrying out magnetic stirring, adding thiourea and a reducing agent to obtain a mixed solution, adjusting the pH value to 7.8-8.5, and continuing stirring to obtain a uniform and stable suspension; s2, transferring the suspension into a reaction kettle, sealing the reaction kettle, putting the reaction kettle into a constant-temperature drying box, heating for 10-14 hours at 170-220 DEG C, naturally cooling, taking the reaction kettle out, carrying out vacuum filtration on the suspension in the reaction kettle, washing and drying to obtain sulfur-nitrogen co-doped graphene; s3, dissolving the sulfur-nitrogen co-doped graphene into an organic dispersing agent to prepare a solution with the concentration of 1mg / ml-5 mg / ml; carrying out ultrasonic oscillation and magnetic stirring to obtain a uniform and stable sulfur-nitrogen co-doped graphene suspension, soaking acleaned graphite felt electrode in the suspension for 20-48h, drying, and carrying out heat treatment on the dried graphite felt electrode in a tubular furnace at 700-1100 DEG C for 2-5h to obtain thesulfur-nitrogen co-doped graphene modified graphite felt composite electrode.
Owner:SHENYANG JIANZHU UNIVERSITY
Manganese-doped regeneration lithium iron phosphate positive electrode material and method for preparing same
InactiveCN108376768ANarrow particle size distributionGood electrical conductivityCell electrodesWaste accumulators reclaimingCurrent collectorCarbon source
The invention relates to a method for preparing a manganese-doped regeneration lithium iron phosphate positive electrode material. The method includes steps of 1), calcining waste lithium iron phosphate battery positive electrode materials, then stripping the lithium iron phosphate battery positive electrode materials from positive electrode current collectors, and sieving the lithium iron phosphate battery positive electrode materials to obtain waste positive electrode materials; 2), supplementarily adding lithium sources, iron sources, manganese sources and phosphorus sources into the wastepositive electrode materials according to the contents of elements in the waste positive electrode materials to allow a final molar ratio of the lithium sources to the iron sources to the manganese sources to the phosphorus sources to be 1.05:(0.9-0.99):(0.01-0.1):1, adding carbon sources into the waste positive electrode materials according to 1-25% of theoretical lithium iron phosphate output mass, carrying out wet ball-milling to obtain uniform mixtures; 3), calcining the uniform mixtures under the protection of inert atmosphere at the temperatures of 600-750 DEG C for 2-10 hours to obtainthe manganese-doped regeneration lithium iron phosphate positive electrode material. The method has the advantages that the method is simple in process and easy to scale up, the manganese-doped regeneration lithium iron phosphate positive electrode material prepared by the method is narrow in particle size distribution, good in electric conductivity, high in specific capacity, stable in cycle andexcellent in rate capability, and the method is suitable for industrially recycling waste lithium iron phosphate battery positive electrode materials on a large scale.
Owner:STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +3
Preparation method of biomass porous carbon electromagnetic wave-absorbing material taking egg white as precursor
ActiveCN110482526ALarge specific surface areaLow costOther chemical processesCarbon preparation/purificationWater bathsProtein solution
The invention discloses a preparation method of a biomass porous carbon electromagnetic wave-absorbing material taking egg white as a precursor, and belongs to the technical field of electromagnetic wave-absorbing material preparation. The method comprises the following steps: pretreating egg white to obtain a uniform protein solution; adding a potassium carbonate solution into the protein solution to form a uniform solution, titrating, and carrying out ultrasonic crushing to obtain a precursor solution; heating the precursor solution in a water bath to obtain a porous carbon precursor; freezing the precursor with liquid nitrogen, and freeze-drying the precursor to obtain a dried porous carbon precursor; and heating and carbonizing the dried porous carbon precursor in an argon atmosphere.Selection of carbon source materials of the porous carbon is broadened, and compared with other carbon source materials, the selected carbon source belongs to renewable biomass and is low in cost. Theporous carbon material has a large specific surface area, and has a large number of active scattering sites due to introduction of nitrogen, so that the porous carbon material has good electromagnetic wave-absorbing performance.
Owner:HARBIN INST OF TECH
Tungsten-doped vanadium dioxide nanopowder and preparation method for the same
ActiveCN102295312BDoping achievedGood dispersionNanostructure manufactureVanadium oxidesVanadium dioxideTungstate
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Magnetic alpha-Fe2O<3-[delta]>C<[delta]>/FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, preparation method and applications thereof
ActiveCN104971751AControl dopingSimple processPhysical/chemical process catalystsWater/sewage treatment by irradiationHeterojunctionElectron
The invention discloses a magnetic alpha-Fe2O<3-[delta]>C<[delta]> / FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, a preparation method and applications thereof. The preparation method comprises the following steps: taking FeCl3.6H2O as the iron source and NH4VO3 as the vanadium source, evenly stirring, adjusting the pH to 7.5-8.5, adding glucose to obtain a precursor solution; subjecting the precursor solution to a hydrothermal reaction, and burning the reaction product so as to obtain the magnetic alpha-Fe2O<3-[delta]>C<[delta]> / FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst. In the provided preparation method, the C element in glucose is doped into the crystal lattices of FeVO4 and Fe2O3, thus the controllable change of relative contents of C element in the two phases can be achieved; the electron-cavity separation rate, photocatalytic efficiency, and application stability of the photocatalyst are effectively improved; at the same time, the magnetic performance of the heterojunction photocatalyst is improved in a certain degree, and thus the magnetic recovery of the photocatalyst becomes more easier.
![Magnetic alpha-Fe2O<3-[delta]>C<[delta]>/FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, preparation method and applications thereof](https://images-eureka.patsnap.com/patent_img/a435961c-31b8-4cdc-9faa-b6efc798df4a/HDA0000748439760000011.PNG "Magnetic alpha-Fe2O<3-[delta]>C<[delta]>/FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, preparation method and applications thereof")
![Magnetic alpha-Fe2O<3-[delta]>C<[delta]>/FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, preparation method and applications thereof](https://images-eureka.patsnap.com/patent_img/a435961c-31b8-4cdc-9faa-b6efc798df4a/HDA0000748439760000012.PNG "Magnetic alpha-Fe2O<3-[delta]>C<[delta]>/FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, preparation method and applications thereof")
![Magnetic alpha-Fe2O<3-[delta]>C<[delta]>/FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, preparation method and applications thereof](https://images-eureka.patsnap.com/patent_img/a435961c-31b8-4cdc-9faa-b6efc798df4a/HDA0000748439760000021.PNG "Magnetic alpha-Fe2O<3-[delta]>C<[delta]>/FeVO<4-x+[delta]>C<x-[delta]> heterojunction photocatalyst, preparation method and applications thereof")
Owner:SHAANXI UNIV OF SCI & TECH
Multi-doped graphene composite nano material and preparation method and application thereof
InactiveCN109999884AFacilitated reaction kineticsPromote absorptionMaterial nanotechnologyWater/sewage treatment by irradiationDoped graphenePyrophosphate
The invention provides a multi-doped graphene composite nano material and a preparation method and application thereof. The method comprises the steps that dispersion liquid of graphene oxide, urea, pyrophosphate and silicon dispersion liquid, a selenium hydrazine hydrate dispersion liquid, a sodium molybdate saturated aqueous solution and the like serve as raw materials to realize multi-doping ofnitrogen, phosphorus, silicon and molybdenum selenide to graphene, and the obtained multi-doped graphene composite nano material can improve the reaction dynamics of carbon, provides more active sites for energy storage, has excellent visible light absorption performance, can fully utilize sunlight to carry out photocatalytic degradation on environmental pollutants, and has good photocatalytic performance. After heteroatoms are doped, the reactivity of the graphene oxide or the graphene is improved, so that further doping of the residual heteroatoms is facilitated; moreover, the interaction among the heteroatoms further improves the doping stability.
Owner:杭州鼎好新材料有限公司
Preparation method of porous nitrogen-doped graphene/carbon nanotube composite conductive agent
InactiveCN107039656AMild reaction conditionsNo pollution in the processCell electrodesSecondary cellsDoped grapheneCarbon nanotube
The invention discloses a preparation method of a porous nitrogen-doped graphene / carbon nanotube composite conductive agent. The preparation method comprises the steps of inoculating phanerochaete chrysosporium into a seed expansion culture solution for aerobic culture to obtain a seed liquid; adding the seed liquid and a graphene suspension liquid into a nutrition limitation culture solution, and dispersing the product subjected to constant-temperature shaking culture and processing in deionized water to obtain a nanopore graphene oxide suspension liquid; mixing the product and a carbon nanotube suspension liquid, performing ultrasonic processing, adding the mixed suspension liquid to an anaerobic denitrifying bacteria culture solution, and inoculating denitrifying bacteria seed liquid for anaerobic culture to obtain the porous nitrogen-doped graphene / carbon nanotube composite conductive agent. A two-step green preparation method is employed, a toxic reagent is not used, the preparation method has the advantages of moderate and controllable reaction process and low cost, and is easy to promote, and the prepared porous nitrogen-doped graphene / carbon nanotube composite conductive agent can be widely applied into the fields of a lithium ion battery and the like.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Sulfur-doped crystal carbon nitride for photocatalytic decomposition of water to produce hydrogen and preparation method and application thereof
PendingCN112473713ADoping achievedReduce volatilityChemical industryCatalyst activation/preparationFreeze-dryingMaterials science
The invention discloses sulfur-doped crystal carbon nitride for photocatalytic decomposition of water into hydrogen as well as a preparation method and application of the sulfur-doped crystal carbon nitride, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: by taking trithiocyanuric acid or a mixture of trithiocyanuric acid and melamine as a raw material, carrying out hydrothermal freeze drying to pre-polymerize reactants, calcining to obtain sulfur-doped carbon nitride, and carrying out short-time molten salt treatment to obtain the sulfur-doped crystal carbon nitride. According to the method, heteroatom doping and crystallization modification means are combined, so that sulfur atoms are fixed in a carbon-nitrogen networkthrough hydrothermal freeze-drying prepolymerization, sulfur volatilization can be effectively reduced through short-time molten salt treatment, and sulfur doping is achieved on the basis that crystal carbon nitride is obtained. The sulfur-doped crystal carbon nitride is small in forbidden band width and large in specific surface area, wherein the photocatalytic hydrogen production activity is remarkably higher than that of crystal carbon nitride, sulfur-doped carbon nitride and bulk-phase carbon nitride. In addition, fused salt calcination time is remarkably shortened, and energy conservation is improved.
Owner:NANKAI UNIV
Preparation method of lithium and nitrogen co-doped diamond film
InactiveCN103952681AShallow donor levelEnhanced Electron MobilityChemical vapor deposition coatingChemistryDiamond thin film
The invention discloses a preparation method of a lithium and nitrogen co-doped diamond film. The preparation method comprises the following steps: coating a layer of suspension liquid containing a lithium source on the surface of a substrate on which a diamond film is pre-deposited; after drying, putting into a reaction chamber of a heater chemical vapor deposition system, heating in a hydrogen atmosphere to melt powder containing the lithium source and allowing lithium to be dispersed in diamond; subsequently further depositing the lithium and nitrogen co-doped diamond film in a nitrogen-containing atmosphere by adopting a heater chemical vapor deposition method. The lithium and nitrogen co-doped diamond film has low surface work function, is liable to emit electrons under the effect of heat and the effect of an electric field, and can be applied to thermo-electron energy transforming components and field emission display components.
Owner:NANJING UNIV OF SCI & TECH
Method for rapid solvent-free preparation of heteroatom-doped graphitized carbon with high specific surface area
InactiveCN107311142AOvercome the defects of large consumption and environmental pollutionOvercoming Pollution DefectsCarbon preparation/purificationSulfonateOrganic sulfonic acid
The invention discloses a method for rapid solvent-free preparation of heteroatom-doped graphitized carbon with high specific surface area. The method comprises the following steps: carrying out grinding and mixing on organic sulfonate and / or organic phosphonate and oxygen-containing organic polymer; then putting a mixture in protective atmosphere, and carbonizing at high temperature; washing and drying a carbonized product to obtain the heteroatom-doped graphitized carbon with the high specific surface area and mesopore and micropore structures. The method has the advantages of simple operation, no need of solvent, high yield and controllable heteroatom content; in addition, the production cost is greatly reduced, and industrial production is facilitated.
Owner:CENT SOUTH UNIV
Preparation method of nitrogen-sulfur co-doped porous graphene by means of supramolecular template method
The invention relates to a preparation method of nitrogen-sulfur co-doped porous graphene by means of a supramolecular template method. According to the preparation method of the nitrogen-sulfur co-doped porous graphene by means of the supramolecular template method, graphene oxide is used as a raw material, a complex of the graphene oxide and melamine trimeric thiocyanate is obtained through supramolecular polymerization between the melamine and the trimeric thiocyanate, then the melamine trimeric thiocyanate is removed by calcination, and the nitrogen-sulfur co-doped porous graphene is prepared. According to the preparation method of the nitrogen-sulfur co-doped porous graphene by means of the supramolecular template method, compared with the prior art, a pore-forming agent or template agent is not needed to be introduced additionally, heteroatom precursors involved are all cheap industrial raw materials, so that the advantages of simple operation, low production cost and the like are achieved, the porous graphene is obtained, while nitrogen-sulfur co-doping is further achieved, and the obtained nitrogen-sulfur co-doped porous graphene has excellent electrochemical properties.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Preparation method of sharpened monocrystal high-voltage spinel lithium nickel manganese oxide cathode material
ActiveCN110438557AIncrease profitSimple and efficient operationPolycrystalline material growthCell electrodesManganese oxideNickel
The invention discloses a preparation method of a sharpened monocrystal high-voltage spinel lithium nickel manganese oxide cathode material. The preparation method comprises the steps that (1) a lithium source, a nickel source, a manganese source, dopants, a fluxing agent and organic acid are mixed evenly; (2) a heating furnace is heated up to 80-300 DEG C and subjected to heat preservation, thena mixed material obtained in the step (1) is put into the heating furnace to be subjected to heat preservation for 0.5-30 h at the temperature, and a low-temperature eutectic mixture is formed; and (3) the low-temperature eutectic mixture obtained in the step (2) is placed into the heating furnace at the preset temperature of 300-700 DEG C to be heated and ignited, then sintered and naturally cooled with the furnace, and thus the sharpened monocrystal high-voltage spinel lithium nickel manganese oxide cathode material is obtained. The preparation method is simple in process, high in efficiencyand low in equipment requirement, the raw material mixing level of a liquid phase combustion method can be reached, raw material splashing in the liquid phase combustion method ignition process is further avoided, and large-scale production is easy to realize.
Owner:HUNAN CHANGYUAN LICO CO LTD
Preparation method of negative electrode lead plaster of lead-acid storage battery and negative electrode plate
ActiveCN112436143AEliminate picklingEliminates alkali washing and other processesLead-acid accumulator electrodesNitrogen and non-metal compoundsFiberElectrical battery
Owner:FENGFAN
Titanium tantalate-based photocatalyst doped with niobium and vanadium as well as preparation method and application of titanium tantalate-based photocatalyst
ActiveCN109158101AFacilitates separation and transferExtend your lifeWater/sewage treatment by irradiationWater treatment compoundsIonChemical measurement
The invention discloses a titanium tantalate-based photocatalyst doped with niobium and vanadium as well as a preparation method and application of the titanium tantalate-based photocatalyst, and belongs to the field of inorganic photocatalytic materials. According to the stoichiometric ratio of TiTa18-x-yNbxVyO47, wherein x and y are respectively the molar volumes of Nb<5+> doped and substitutedTa and V<5+> doped and substituted Ta, x is 0.1 to 5.4 and y is 0.1 to 2, raw materials containing Ti<4+>, Nb<5+>, Ta<5+> and V<5+> are weighed, a proper amount of a compound containing Li<+> ions isweighed as a sintering aid, and the pure phase titanium tantalate-based photocatalyst doped with niobium and vanadium is obtained by adopting a stepped sintering process. According to the invention, the titanium tantalate-based photocatalyst is obtained by doping the Nb with the V and the absorption in a visible light range is enhanced; meanwhile, lattice disturbance greatly improves the separation efficiency of photo-induced charge and enhances the photocatalytic ability. The titanium tantalate-based photocatalyst doped with niobium and vanadium is simple in preparation technology, low in cost, good in stability of photocatalytic materials, and capable of degrading organic pollutants under the irradiation of ultraviolet light and near ultraviolet light, and especially degrading the organic pollutants in water, thereby facilitating environmental protection.
Owner:NANTONG TEXTILE & SILK IND TECH RES INST +1
Sisal-based nitrogen and phosphorus co-doped activated carbon as well as preparation method and application thereof
InactiveCN112225217ASolving activitySolve efficiency problemsCarbon compoundsActivated carbonSisal fiber
The invention discloses sisal-based nitrogen and phosphorus co-doped activated carbon, and further discloses a preparation method of the sisal-based nitrogen and phosphorus co-doped activated carbon.The method comprises the following steps: sequentially subjecting sisal fibers to impregnating, drying, carbonizing, activating, washing and drying in a mixed solution to obtain the sisal-based nitrogen and phosphorus co-doped activated carbon. The mixed solution is prepared by adding potassium hydroxide, a hydrogen peroxide solution, urea and potassium phosphate into deionized water. The invention further provides application of the sisal-based nitrogen and phosphorus co-doped activated carbon. The sisal fibers are treated by a one-step method, so that the sisal-based nitrogen-phosphorus co-doped activated carbon prepared from the sisal fibers is of a hierarchical porous structure and has a reasonable specific surface area and excellent electrical properties.
Owner:FANGDA CARBON NEW MATERIAL CO LTD +1
Doping method for silicon based rear earth doped luminescent material
The invention provides a method for preparing silicon-based rare earth adulterated luminescent material and is characterized in that: the method comprises the following steps: step 1: silicon-based underlay material, or film on silicon-based underlay material is taken; step 2: A layer of silicon-based film including impurity is prepared on the underlay material or the film on the silicon-based underlay material through ion injection or deposition method; step 3: The silicon-based film material on the silicon-based material is crystallized by way of annealing and compound quantum dots containing impurity element are prepared at the same time; step 4: the rare earth ions are adulterated by way of ion injection; step 5: the rare earth ions are activated by way of annealing.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Lithium cobalt oxide positive electrode material, preparation method thereof and lithium battery
InactiveCN113060769AIncrease capacityImprove cycle stabilityCell electrodesCobalt compoundsPhysical chemistryCharge compensation
The invention provides a lithium cobalt oxide positive electrode material and a preparation method thereof, the preparation method is characterized in that three elements Ba, Ga and Ru with different modification action mechanisms are doped into a lithium cobalt oxide lattice, and the barium element realizes the purpose of reducing a Li < + > diffusion energy barrier by adjusting a geometric structure and an electronic structure of lithium cobalt oxide; the gallium element plays a role in stabilizing the lattice structure of the lithium cobalt oxide through high binding energy with oxygen; the ruthenium element plays a role in inhibiting charge compensation behavior of oxygen in lithium cobalt oxide under high voltage and irreversible phase change under 4.55 V by reducing an energy level overlapping region of a 3d track of cobalt and a 2p track of oxygen, and under the action of three different regulation mechanisms, the capacity, the cycling stability and the rate capability of the lithium cobalt oxide positive electrode material under high voltage are improved, and meanwhile, the lithium cobalt oxide positive electrode material has wider practical applicability in the aspect of electrochemical energy storage due to the good electrochemical charge-discharge behavior of the lithium cobalt oxide positive electrode material.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Preparation method of moisture-proof and efficient ozone decomposition agent
PendingCN113083289AMany poresRich in contentHeterogenous catalyst chemical elementsDispersed particle separationManganese oxideEnvironmental chemistry
The invention relates to a preparation method of a moisture-proof and efficient ozone decomposition agent, the preparation method comprises the step of synchronously carrying out transition metal ion doping and manganese dioxide high-activity crystalline phase conversion, and specifically comprises the following steps: adding a framework material in a process of synthesizing manganese dioxide by a hydrothermal method to obtain a mesoporous manganese dioxide material with a low particle size and a high specific surface area, realizing transition metal ion co-catalyst doping and conversion from a low catalytic activity crystal phase to a high catalytic activity crystal phase of manganese dioxide through a post-treatment reaction, and performing the conventional granulation process on the obtained ozone destroying active component to finally obtain the high-environment-humidity-resistant mesoporous ozone destroying agent. The agent has the advantages that the operation is simple, additional heating is not needed, ozone tail gas is efficiently degraded at low temperature, the cost is low, and excellent catalytic performance can still be kept in a high-humidity environment.
Owner:江苏治水有数环保科技有限公司
Doped ternary positive electrode material and preparation method and application thereof
ActiveCN113666429AEasy to dopeDoping achievedCell electrodesSecondary cellsFreeze-dryingLithium hydroxide
The invention provides a doped ternary positive electrode material and a preparation method and application thereof. The preparation method comprises the steps of S1, mixing a replacement plasma, an organic replacement agent and a solvent, and carrying out a dissolution thermal reaction to obtain a dissolution thermal reaction solution; S2, mixing and stirring the dissolved thermal reaction solution and nickel-cobalt-manganese hydroxide, and then freeze-drying to obtain a freeze-dried product; S3, grinding the freeze-dried product, and then mixing with lithium hydroxide to obtain a mixed material; and S4, calcining the mixed material to obtain the doped ternary positive electrode material. The doped ternary positive electrode material prepared by the method provided by the invention is stable in structure, has good cycle performance and safety when being applied to the lithium ion battery, and also has good rate capability.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD
Cobalt oxide nanosheet coated with nitrogen-doped carbon layer and preparation method and energy storage application of cobalt oxide nanosheet
PendingCN113707861ADoping achievedImprove conductivityMaterial nanotechnologyCell electrodesCarbon layerArgon atmosphere
The invention discloses a nitrogen-doped carbon layer-coated cobalt oxide nanosheet and a preparation method and energy storage application thereof. The preparation method comprises the following steps: thermally synthesizing a cobalt oxide nanosheet precursor through a solvent, and then loading a polyvinylpyrrolidone coating layer which is simultaneously used as a nitrogen source and a carbon source on the surface of the cobalt oxide nanosheet precursor; finally, carrying out high-temperature calcination under the protection of an argon atmosphere, and fully utilizing in-situ carbonization and decomposition of polyvinylpyrrolidone to obtain the cobalt oxide nanosheet coated with the nitrogen-doped carbon layer. The material is simple in preparation method, low in cost, easy to control in process and capable of being produced in batches; and when the cobalt oxide nanosheet coated with the nitrogen-doped carbon layer prepared by the invention is used as a lithium ion battery negative electrode material, the cobalt oxide nanosheet has excellent specific capacity and rate capability.
Owner:HEFEI UNIV OF TECH
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